WorldWideScience

Sample records for beam line design

  1. Beam line design using G4BeamLine

    CERN Document Server

    Dogan, Arda

    2014-01-01

    In Turkey in Ankara TAEK SANAEM Proton Accelerator Facility (PAF), there is a cyclotron which produces a focused intense 30 MeV proton beam and sends this beam to four different arms, three of which uses this beam to produce pharmaceutical medicine. The remaining one is spared for R&D purposes and the idea was to use these protons coming out from the fourth arm to use space radiation tests, which cannot be done in Turkey at the moment. However, according to SCC 25100 standards which is for 30 MeV protons, the beam coming out of cyclotron is too intense and focused to use for space radiation tests. Therefore, the main aim of my project is to design a beam line which will defocus the beam and reduce the flux so that the space radiation tests can be done according to the standards of SCC 25100.

  2. Status of Design of PEFP Beam Lines

    Energy Technology Data Exchange (ETDEWEB)

    Park, Bum Sik; Cho, Yong Sub; Kwon, Hyeok Jung; Jang, Ji Ho; Hong, In Seok; Kim, Han Sung; Yun, Sang Pil; Lee, Hwa Ryun; Kim, Kye Ryung; Choi, Byung Ho [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2009-10-15

    PEFP(Proton Engineering Frontier Project) is developing a high current 100MeV proton linear accelerator. 20MeV and 100MeV proton beam lines are also under development for beam applications. 10 beam lines will be developed to support various purposes. Two kind of proton beam energy will be transported to 2 beamlines for industrial applications and 3 beamlines for various researches. The characteristic design scheme of PEFP beam lines is the application of a programmable AC magnet. Beam distribution to 3 research beam lines will be conducted sequentially to increase the operation efficiency by using it. To provide flexibility of the irradiation conditions, each beam line is designed to have specific beam parameters. The development of beamline components, including magnets, is conducted in parallel. The details will be reported.

  3. Status of Design of PEFP Beam Lines

    International Nuclear Information System (INIS)

    PEFP(Proton Engineering Frontier Project) is developing a high current 100MeV proton linear accelerator. 20MeV and 100MeV proton beam lines are also under development for beam applications. 10 beam lines will be developed to support various purposes. Two kind of proton beam energy will be transported to 2 beamlines for industrial applications and 3 beamlines for various researches. The characteristic design scheme of PEFP beam lines is the application of a programmable AC magnet. Beam distribution to 3 research beam lines will be conducted sequentially to increase the operation efficiency by using it. To provide flexibility of the irradiation conditions, each beam line is designed to have specific beam parameters. The development of beamline components, including magnets, is conducted in parallel. The details will be reported

  4. Design principles for high current beam injection lines

    International Nuclear Information System (INIS)

    We discuss the design principles for high current injection beam lines having a high degree of beam quality preservation. These principles are applied to designing a high current e-beam injection line delivering 10 MeV e-beams from the injector to an accelerator driving LTV FELs, as proposed at CEBAF

  5. Conceptual design of parallel beam lines for tandem accelerator

    International Nuclear Information System (INIS)

    In order to get enough beam current for each parallel beam line, the beam intensity distribution along aperture on the diaphragm is calculated to deduce a function which is verified by computer program for simulating charged particle beam transport systems, based on this function relationship between emittance of beam and the different aperture parameters on diaphragm is analyzed. At the end, a conceptual design of parallel beam line is given and the parameters of the optical elements are calculated. The results are accurate and credible. quality of beam can reach the requirements of user for nuclear physics experiments. (authors)

  6. Design of Neutral Beam-Line of EAST

    Institute of Scientific and Technical Information of China (English)

    胡纯栋; 盛鹏; 许永建; 梁立振; 谢远来; 韦江龙; 谢亚红; 李军; 刘智民; 刘胜; 蒋才超

    2011-01-01

    Neutral beam injector for EAST is designed to deliver deuterium beams with a power of 2 MW to 4 MW at an energy of 50 keV to 80 keV into the plasma with a beam dimension of 12 cm× 48 cm. Considering the beam generation and transmission, a columniform beam-line of Ф 250 cm × 400 cm is designed with a neutralizer, ion dump, calorimeter, bending magnet and cryopanels. The arrangement of the internal elements for the beam-line is reported. A rectangular sleeve coupled to the ion source is employed as the neutralizer. At the downstream of the neutralizer, a dipole magnet separates the residual ions from the beam passage with a reflection radius of 42 cm for the full energy particles. The calorimeter and the ion dump serve as high heat flux components, which will work as thermal inertia targets in the first phase of operation.

  7. Design and development of radiation absorber for sighting beam line

    International Nuclear Information System (INIS)

    During the commissioning of Indus-2 , it is necessary to view the synchrotron radiation that will be emanating from the dipole exit ports. The 100 beam line from dipole 11 was earmarked for sighting beam line. The synchrotron radiation power density would be around 340 watts on the photon absorber inside the radiation absorber module, at the specified beam power of Indus-2. The beam striking on this photon absorber produces x-rays and Bremsstrahlung radiation. These are to be stopped and absorbed by radiation absorber. The photon absorber and the radiation absorber are integrated in a single vacuum chamber and actuated by a pneumatic cylinder connected using a bellow. Radiation absorber was needed to isolate the diagnostic components and to protect them from radiation a well as heat when they were not in use. The paper describes the design, calculation and development of the dynamic photon cum radiation absorber. The ultimate vacuum performance is also described. (author)

  8. Beam line design for synchrotron spectroscopy in the VUV

    International Nuclear Information System (INIS)

    The character of the radiation source provided by an electron storage ring is briefly reviewed from the point of view of utilization for VUV spectroscopy. The design of beam line components is then considered with special reference to the problems of contamination of optical surfaces and vacuum protection. The issues involved in designing mirrors for use with storage rings are considered with emphasis on the questions of power dissipation, image quality and materials selection

  9. Design of Database System of HIRFL-CSR Beam Line

    International Nuclear Information System (INIS)

    This paper introduces the database design and optimization for the power supply system of Lanzhou Heavy Ion Accelerator CSR (HIRFL-CSR) beam line. Based on HIFEL-CSR main Oracle database system, the interface was designed to read parameters of the power supply while achieving real-time monitoring. A new database system to store the history data of power supplies was established at the same time, and it realized the data exchange between Oracle database system and Access database system. Meanwhile, the interface was designed conveniently for printing and query parameters. (authors)

  10. Design of general apochromatic drift-quadrupole beam lines

    Science.gov (United States)

    Lindstrøm, C. A.; Adli, E.

    2016-07-01

    Chromatic errors are normally corrected using sextupoles in regions of large dispersion. In low emittance linear accelerators, use of sextupoles can be challenging. Apochromatic focusing is a lesser-known alternative approach, whereby chromatic errors of Twiss parameters are corrected without the use of sextupoles, and has consequently been subject to renewed interest in advanced linear accelerator research. Proof of principle designs were first established by Montague and Ruggiero and developed more recently by Balandin et al. We describe a general method for designing drift-quadrupole beam lines of arbitrary order in apochromatic correction, including analytic expressions for emittance growth and other merit functions. Worked examples are shown for plasma wakefield accelerator staging optics and for a simple final focus system.

  11. The expert system OPTRAN (Ver 1.0) and its application to beam transportation line design

    International Nuclear Information System (INIS)

    The expert system OPTRAN (Ver 1.0) used for beam transportation line design is introduced. The knowledge storage and reasoning principle, of which the intelligence part of OPTRAN are composed, have been described in detail. By using OPTRAN (Ver 1.0), the design of a beam transportation line for extracted ion beam of Cyclone 30 was completed

  12. Preliminary design of electrostatic sensors for MITICA beam line components

    Energy Technology Data Exchange (ETDEWEB)

    Spagnolo, S., E-mail: spagnolo@igi.cnr.it; Spolaore, M.; Dalla Palma, M.; Pasqualotto, R.; Sartori, E.; Serianni, G.; Veltri, P. [Consorzio RFX, Associazione EURATOM-ENEA sulla Fusione, 35127 Padova (Italy)

    2016-02-15

    Megavolt ITER Injector and Concept Advancement, the full-scale prototype of ITER neutral beam injector, is under construction in Italy. The device will generate deuterium negative ions, then accelerated and neutralized. The emerging beam, after removal of residual ions, will be dumped onto a calorimeter. The presence of plasma and its parameters will be monitored in the components of the beam-line, by means of specific electrostatic probes. Double probes, with the possibility to be configured as Langmuir probes and provide local ion density and electron temperature measurements, will be employed in the neutralizer and in the residual ion dump. Biased electrodes collecting secondary emission electrons will be installed in the calorimeter with the aim to provide a horizontal profile of the beam.

  13. Neutron beam-line shield design for the protein crystallography instrument at the Lujan Center

    International Nuclear Information System (INIS)

    We have developed a very useful methodology for calculating absolute total (neutron plus gamma-ray) dose equivalent rates for use in the design of neutron beam line shields at a spallation neutron source. We have applied this technique to the design of beam line shields for several new materials science instruments being built at the Manuel Lujan Jr. Neutron Scattering Center. These instruments have a variety of collimation systems and different beam line shielding issues. We show here some specific beam line shield designs for the Protein Crystallography Instrument. (author)

  14. Design studies for a long base-line neutrino beam

    CERN Document Server

    Ball, A E; Vassilopoulos, N

    1995-01-01

    Strong interest has recently been shown in very long base-line neutrino beams, directed at existing or planned massive detector facilities, in order to extend the search for neutrino oscillations. Among such possibilities are beams from CERN pointing towards the Gran Sasso Underground Laboratory in the Ionian Sea off the west coast of the Peloponnese. In order to establish the basic parameters, a number of possible configurations for such beams have been studies covering a range of neutrino energy bands, estimates of the neutrino fluxes, event rates and backgrounds at typical detectors are reported. Considerations have been gioven to the optimum lenght and radius of the decay tunnels. It is shown that with one year of operation, a neutrino oscillation search down to limits of sin2 Ø = 0.01 and m2 = 0.001eV2 could be made with currently proposed detectors.

  15. Final design of the neutral beam lines for the Tokamak Fusion Test Reactor

    International Nuclear Information System (INIS)

    Final design of the neutral beam lines for TFTR has been completed. A prototype has been assembled at Lawrence Berkeley Laboratory and is undergoing testing as part of the Neutral Beam System Test Facility (NBSTF). The final neutral beam line (NBL) configuration differs in several details from that previously reported upon; certain components have been added; and testing of the cryopump system has led to some design simplification. It is these developments which are reported herein

  16. Design studies for a long base-line neutrino beam

    Energy Technology Data Exchange (ETDEWEB)

    Ball, A.E. [European Lab. for Particle Physics (CERN), Geneva (Switzerland); Katsanevas, S. [University of Athens, 104 Solonos, GR-106 80 Athens (Greece); Vassilopoulos, N. [University of Athens, 104 Solonos, GR-106 80 Athens (Greece)

    1996-12-11

    Strong interest has recently been shown in very long base-line neutrino beams, directed at existing or planned massive detector facilities, in order to extend the search for neutrino oscillations. Among such possibilities are beams from CERN pointing towards the Gran Sasso Underground Laboratory in Italy and the NESTOR Underwater Laboratory in the Ionian Sea off the west coast of the Peloponnese. In order to establish the basic parameters, a number of possible configurations for such beams have been studied covering a range of neutrino energy bands; estimates of the neutrino fluxes, event rates and backgrounds at typical detectors are reported. Considerations have been given to the optimum length and radius of the decay tunnels. It is shown that with one year of operation, a neutrino oscillation search down to limits of sin{sup 2} 2{theta}=1.1 x 10{sup -2} and {Delta}m{sup 2}=3.5 x 10{sup -4} eV{sup 2} could be made with currently proposed detectors. (orig.).

  17. Design studies for a long base-line neutrino beam

    International Nuclear Information System (INIS)

    Strong interest has recently been shown in very long base-line neutrino beams, directed at existing or planned massive detector facilities, in order to extend the search for neutrino oscillations. Among such possibilities are beams from CERN pointing towards the Gran Sasso Underground Laboratory in Italy and the NESTOR Underwater Laboratory in the Ionian Sea off the west coast of the Peloponnese. In order to establish the basic parameters, a number of possible configurations for such beams have been studied covering a range of neutrino energy bands; estimates of the neutrino fluxes, event rates and backgrounds at typical detectors are reported. Considerations have been given to the optimum length and radius of the decay tunnels. It is shown that with one year of operation, a neutrino oscillation search down to limits of sin2 2θ=1.1 x 10-2 and Δm2=3.5 x 10-4 eV2 could be made with currently proposed detectors. (orig.)

  18. Design and end chamfer simulation of PEFP beam line curved dipole magnets%Design and end chamfer simulation of PEFP beam line curved dipole magnets

    Institute of Scientific and Technical Information of China (English)

    朱应顺; 杨梅; 张卓; 陈宛; 尹宝贵; 石才土; 康文

    2011-01-01

    The design, fabrication and field measurement of 11 DC curved dipole magnets for the PEFP Beam Line have been completed. In this paper, a design method for a complex end chamfer using OPERA-3D is proposed. The conventional method for estimating chamfer sh

  19. Beam Transfer Line Design for a Plasma Wakefield Acceleration Experiment (AWAKE) at the CERN SPS

    CERN Document Server

    Bracco, C; Brethoux, D; Clerc, V; Goddard, B; Gschwendtner, E; Jensen, L K; Kosmicki, A; Le Godec, G; Meddahi, M; Muggli, P; Mutin, C; Osborne, O; Papastergiou, K; Pardons, A; Velotti, F M; Vincke, H

    2013-01-01

    The world’s first proton driven plasma wakefield acceleration experiment (AWAKE) is presently being studied at CERN. The experimentwill use a high energy proton beam extracted from the SPS as driver. Two possible locations for installing the AWAKE facility were considered: the West Area and the CNGS beam line. The previous transfer line from the SPS to the West Area was completely dismantled in 2005 and would need to be fully re-designed and re-built. For this option, geometric constraints for radiation protection reasons would limit the maximum proton beam energy to 300 GeV. The existing CNGS line could be used by applying only minor changes to the lattice for the final focusing and the interface between the proton beam and the laser, required for plasma ionisation and bunch-modulation seeding. The beam line design studies performed for the two options are presented.

  20. Magnet lattice design of the SSRF electron-beam transfer lines

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Under three-dimensional plane geometrical constraints (X,Y,θ), with two asymmetric achromatic sections,the combined three-section structural FODO-like magnet lattice design is adopted and finely optimized in the SSRF electron-beam transfer lines. The magnet lattice has high flexibility and robustness, and the Courant-Snyder parameters can be easily adjusted within a wide range to meet the requirements of transmission and injection for different operation modes of the linear accelerator, booster synchrotron, and storage ring. In this article, the main parameters of the linear optics design of the SSRF electron-beam transfer lines are described, involving the physical design criteria, the total geometrical layout, the magnet lattice, and the beam Courant-Snyder parameters matching. The studies of the variant beam dynamic simulation program calculations show that the design purpose of the efficient beam transmission and injection will be basically achieved.

  1. Optics calculations and beam line design for the JANNuS facility in Orsay

    Energy Technology Data Exchange (ETDEWEB)

    Chauvin, N. [Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, CNRS/IN2P3, Univ Paris-Sud, UMR8609, ORSAY-Campus F-91405 (France)]. E-mail: chauvin@csnsm.in2p3.fr; Henry, S. [Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, CNRS/IN2P3, Univ Paris-Sud, UMR8609, ORSAY-Campus F-91405 (France); Flocard, H. [Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, CNRS/IN2P3, Univ Paris-Sud, UMR8609, ORSAY-Campus F-91405 (France); Fortuna, F. [Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, CNRS/IN2P3, Univ Paris-Sud, UMR8609, ORSAY-Campus F-91405 (France); Kaitasov, O. [Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, CNRS/IN2P3, Univ Paris-Sud, UMR8609, ORSAY-Campus F-91405 (France); Pariset, P. [Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, CNRS/IN2P3, Univ Paris-Sud, UMR8609, ORSAY-Campus F-91405 (France); Pellegrino, S. [INSTN, CEA-Saclay, 91191 Gif-sur-Yvette Cedex (France); Ruault, M.O. [Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, CNRS/IN2P3, Univ Paris-Sud, UMR8609, ORSAY-Campus F-91405 (France); Serruys, Y. [CEA-Saclay, DEN/DMN/SRMP, 91191 Gif-sur-Yvette Cedex (France); Trocelier, P. [CEA-Saclay, DEN/DMN/SRMP, 91191 Gif-sur-Yvette Cedex (France)

    2007-08-15

    JANNuS (Joint Accelerators for Nano-Science and Nuclear Simulation) will be a unique user facility in Europe dedicated to material modification by ion beam implantation and irradiation. The main originality of the project is that it will be possible to perform implantation and irradiation with simultaneous multiple ions beams and in situ characterization by transmission electron microscopy (TEM) observation or ion beam analysis. This facility will be composed of two experimental platforms located in two sites: the CEA-SRMP in Saclay and the CNRS-CSNSM in Orsay. This paper will focus on the design of two new transport beam lines for the Orsay site. One of the most challenging parts of the JANNuS project (Orsay site) is to design two new beam lines in order to inject, into a 200 kV TEM, two different ion beams (low and medium energy) coming from two existing pieces of equipment: a 2 MV Tandem accelerator and a 190 kV ion implanter. For these new beam lines, first order beam calculations have been done using transfer matrix formalism. A genetic algorithm has been written and adapted to perform the optimization of the beam line parameters. Then, using the SIMION code, field maps of the electrostatic elements (quadrupoles, spherical sectors) have been calculated and ion trajectories have been simulated. We studied specifically the optical aberrations induced by the electrostatic spherical deflectors. Finally, the results of the first order calculations and the field map simulations show a good agreement.

  2. The Final Beam Line Design for the HiRadMat Test Facility

    CERN Document Server

    Hessler, C; Meddahi, M

    2010-01-01

    The High Radiation to Materials facility - hereafter HiRadMat - is designed to allow testing of accelerator components, in particular those of the LHC and its injectors, with the impact of high-intensity pulsed beams. The facility is currently under construction, as an approved CERN project. The installation of the dedicated primary beam line and experimental area is planned during the 2010-2011 technical stop. It will be ready for users after commissioning and some test running in October 2011. A detailed proton beam line design has been performed in order to fulfil the beam parameter specification, in particular the demanding optics flexibility at the test stand location. The studies presented include trajectory correction and aperture studies as well as specifications of magnetic systems, power converters, beam instrumentation and vacuum systems

  3. Design of a support system for the vertical beam transfer lines of the ELENA project

    CERN Document Server

    Bozhkov, Kristiyan

    2016-01-01

    This report aims to present the design of a support system for the vertical beam transfer lines of the ELENA project. Two different designs can be found in this report. The mechanical strength and the structure performance of the support are analysed by a finite element model.

  4. Defocusing beam line design for an irradiation facility at the TAEA SANAEM Proton Accelerator Facility

    Science.gov (United States)

    Gencer, A.; Demirköz, B.; Efthymiopoulos, I.; Yiğitoğlu, M.

    2016-07-01

    Electronic components must be tested to ensure reliable performance in high radiation environments such as Hi-Limu LHC and space. We propose a defocusing beam line to perform proton irradiation tests in Turkey. The Turkish Atomic Energy Authority SANAEM Proton Accelerator Facility was inaugurated in May 2012 for radioisotope production. The facility has also an R&D room for research purposes. The accelerator produces protons with 30 MeV kinetic energy and the beam current is variable between 10 μA and 1.2 mA. The beam kinetic energy is suitable for irradiation tests, however the beam current is high and therefore the flux must be lowered. We plan to build a defocusing beam line (DBL) in order to enlarge the beam size, reduce the flux to match the required specifications for the irradiation tests. Current design includes the beam transport and the final focusing magnets to blow up the beam. Scattering foils and a collimator is placed for the reduction of the beam flux. The DBL is designed to provide fluxes between 107 p /cm2 / s and 109 p /cm2 / s for performing irradiation tests in an area of 15.4 cm × 21.5 cm. The facility will be the first irradiation facility of its kind in Turkey.

  5. New Beam Line Design of TRIAC as a Stable Heavy-Ion Accelerator at KAERI

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Cheol Ho; Chang, Dae Sik; Oh, Byung Hoon [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of); Kim, Yong Kyun [Hanyang University, Seoul (Korea, Republic of); Seo, Chang Seog; Yun, Chong Cheoul [Institute for Basic Science, Daejeon (Korea, Republic of); Jeong, Sun Chan [dHigh Energy Accelerator Research Organization, Tsukuba-shi (Japan)

    2012-05-15

    KEK (High Energy Accelerator Research Organization) TRIAC (Tokai Radioactive Ion Accelerator Complex) was a radioactive isotope accelerator which can provide beams of uranium fission fragments with the maximum energy of 1.1 MeV/nucleon produced by protons of 30 MeV and 1 {mu}A (30 W in beam power, actually deposited in the production target) from the JAEA Tandem Accelerator. Because of the critical limitations in the reaccelerated energy and intensity of available RIBs (Radioactive ion beams), TRIAC considered an upgrade program seriously, but it was canceled. Finally the complex had been closed at the end of 2010, and it was transferred to KAERI (Korea Atomic Energy Research Institute) after being disassembled to promote a new availability in Korea. KAERI team has a plan to reassemble this device as a stable ion beam accelerator with a minimized change for the low energy beam line including the ion source and the target system. The new stable ion accelerator will be used not only for the basic research but also for the application of heavy ion beams. Before the reassembling of TRIAC at KAERI, new layout of the beam line should be designed, and checked by beam optics simulation. The operation conditions and beam optics characteristics of the new beam line components can be understood with this simulation. The works that should be done before reassembling as a new machine have been done in this study. The beam optics calculations were preferentially carried out with arbitrary order beam physics code COSY INFINITY (COSY) or beam envelope code TRANSPORT

  6. New Beam Line Design of TRIAC as a Stable Heavy-Ion Accelerator at KAERI

    International Nuclear Information System (INIS)

    KEK (High Energy Accelerator Research Organization) TRIAC (Tokai Radioactive Ion Accelerator Complex) was a radioactive isotope accelerator which can provide beams of uranium fission fragments with the maximum energy of 1.1 MeV/nucleon produced by protons of 30 MeV and 1 μA (30 W in beam power, actually deposited in the production target) from the JAEA Tandem Accelerator. Because of the critical limitations in the reaccelerated energy and intensity of available RIBs (Radioactive ion beams), TRIAC considered an upgrade program seriously, but it was canceled. Finally the complex had been closed at the end of 2010, and it was transferred to KAERI (Korea Atomic Energy Research Institute) after being disassembled to promote a new availability in Korea. KAERI team has a plan to reassemble this device as a stable ion beam accelerator with a minimized change for the low energy beam line including the ion source and the target system. The new stable ion accelerator will be used not only for the basic research but also for the application of heavy ion beams. Before the reassembling of TRIAC at KAERI, new layout of the beam line should be designed, and checked by beam optics simulation. The operation conditions and beam optics characteristics of the new beam line components can be understood with this simulation. The works that should be done before reassembling as a new machine have been done in this study. The beam optics calculations were preferentially carried out with arbitrary order beam physics code COSY INFINITY (COSY) or beam envelope code TRANSPORT

  7. General design of the International Fusion Materials Irradiation Facility deuteron injector: Source and beam line

    International Nuclear Information System (INIS)

    In the framework of the International Fusion Materials Irradiation Facility-Engineering Validation and Engineering Design Activities (IFMIF-EVEDA) project, CEA/IRFU is in charge of the design and realization of the 140 mA cw deuteron Injector. The electron cyclotron resonance ion source operates at 2.45 GHz and a 4 electrode extraction system has been chosen. A 2 solenoid beam line, together with a high space charge compensation have been optimized for a proper beam injection in the 175 MHz radio frequency quadrupole. The injector will be tested with proton and deuteron beam production either in pulsed mode or in cw mode on the CEA-Saclay site before to be shipped to Japan. Special attention was paid to neutron emission due to (d,D) reaction. In this paper, the general IFMIF Injector design is reported, pointing out beam dynamics, radioprotection, diagnostics, and mechanical aspects.

  8. Design and Status of the ELIMED Beam Line for Laser-Driven Ion Beams

    Directory of Open Access Journals (Sweden)

    G. A. Pablo Cirrone

    2015-08-01

    Full Text Available Charged particle acceleration using ultra-intense and ultra-short laser pulses has gathered a strong interest in the scientific community and it is now one of the most attractive topics in the relativistic laser-plasma interaction research. Indeed, it could represent the future of particle acceleration and open new scenarios in multidisciplinary fields, in particular, medical applications. One of the biggest challenges consists of using, in a future perspective, high intensity laser-target interaction to generate high-energy ions for therapeutic purposes, eventually replacing the old paradigm of acceleration, characterized by huge and complex machines. The peculiarities of laser-driven beams led to develop new strategies and advanced techniques for transport, diagnostics and dosimetry of the accelerated particles, due to the wide energy spread, the angular divergence and the extremely intense pulses. In this framework, the realization of the ELIMED (ELI-Beamlines MEDical applications beamline, developed by INFN-LNS (Catania, Italy and installed in 2017 as a part of the ELIMAIA beamline at the ELI-Beamlines (Extreme Light Infrastructure Beamlines facility in Prague, has the aim to investigate the feasibility of using laser-driven ion beams in multidisciplinary applications. ELIMED will represent the first user’s open transport beam line where a controlled laser-driven ion beam will be used for multidisciplinary and medical studies. In this paper, an overview of the beamline, with a detailed description of the main transport elements, will be presented. Moreover, a description of the detectors dedicated to diagnostics and dosimetry will be reported, with some preliminary results obtained both with accelerator-driven and laser-driven beams.

  9. Beam Line Design and Beam Physics Study of Energy Recovery Linac Free Electron Laser at Peking University

    International Nuclear Information System (INIS)

    Energy recovering linac (ERL) offers an attractive alternative for generating intense beams of charged particles by approaching the operational efficiency of a storage ring while maintaining the superior beam quality typical of a linear accelerator. In ERLs, the decelerated beam cancels the beam loading effects of the accelerated beam with high repetition rate. Therefore, ERLs can, in principle, accelerate very high average currents with only modest amounts of RF power. So the efficiency of RF power to beam is much higher. Furthermore, the energy of beam to dump is lower, so it will reduce dump radiation. With the successful experiments in large maximum-to-injection energy ratio up to 51:1 and high power FEL up to 14kW, the use of ERL, especially combining with superconducting RF technology, provides a potentially powerful new paradigm for generation of the charged particle beams used in MW FEL, synchrotron radiation sources, high-energy electron cooling devices and so on. The 3+1/2 DC-SC photo injector and two 9cell TESLA superconducting cavity for IR SASE FEL in PKU provides a good platform to achieve high average FEL with Energy Recovery. The work of this thesis is on Beam line design and Beam dynamics study of Energy Recovery Linac Free Electron Laser for Peking University. It is the upgrade of PKU facility, which is under construction. With ERL, this facility can work in CW mode, so it can operate high average beam current without RF power constraint in main linac and generate high average FEL power. Moreover, it provides a test facility to study the key technology in ERL. System parameters are optimized for PKU ERL-FEL. The oscillation FEL output power is studied with different bunch charge, transverse emittance, bunch length and energy spread. The theory of optimal RF power and Qext with ERL and without ERL is analyzed and applied to PKU injector and linac including microphonic effect. pace charge effect in the injector and merger is studied for beam energy

  10. Beam Line Design and Beam Physics Study of Energy Recovery Linac Free Electron Laser at Peking University

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Guimei [Peking Univ., Beijing (China)

    2011-12-31

    Energy recovering linac (ERL) offers an attractive alternative for generating intense beams of charged particles by approaching the operational efficiency of a storage ring while maintaining the superior beam quality typical of a linear accelerator. In ERLs, the decelerated beam cancels the beam loading effects of the accelerated beam with high repetition rate. Therefore, ERLs can, in principle, accelerate very high average currents with only modest amounts of RF power. So the efficiency of RF power to beam is much higher. Furthermore, the energy of beam to dump is lower, so it will reduce dump radiation. With the successful experiments in large maximum-to-injection energy ratio up to 51:1 and high power FEL up to 14kW, the use of ERL, especially combining with superconducting RF technology, provides a potentially powerful new paradigm for generation of the charged particle beams used in MW FEL, synchrotron radiation sources, high-energy electron cooling devices and so on. The 3+1/2 DC-SC photo injector and two 9cell TESLA superconducting cavity for IR SASE FEL in PKU provides a good platform to achieve high average FEL with Energy Recovery. The work of this thesis is on Beam line design and Beam dynamics study of Energy Recovery Linac Free Electron Laser for Peking University. It is the upgrade of PKU facility, which is under construction. With ERL, this facility can work in CW mode, so it can operate high average beam current without RF power constraint in main linac and generate high average FEL power. Moreover, it provides a test facility to study the key technology in ERL. System parameters are optimized for PKU ERL-FEL. The oscillation FEL output power is studied with different bunch charge, transverse emittance, bunch length and energy spread. The theory of optimal RF power and Q{sub ext} with ERL and without ERL is analyzed and applied to PKU injector and linac including microphonic effect. pace charge effect in the injector and merger is studied for beam

  11. Lattice design of medium energy beam transport line for n spallation neutron source

    International Nuclear Information System (INIS)

    A 1 GeV H- injector linac is being designed at RRCAT for the proposed Indian Spallation Neutron Source (ISNS). The front-end of the injector linac will consist of Radiofrequency Quadrupole (RFQ) linac, which will accelerate the H- beam from 50 keV to 3 MeV. The beam will be further accelerated in superconducting Single Spoke Resonators (SSRs). A Medium Energy Beam Transport (MEBT) line will be used to transport the beam from the exit of RFQ to the input of SSR. The main purpose of MEBT is to carry out beam matching from RFQ to SSR, and beam chopping. In this paper, we describe the optimization criteria for the lattice design of MEBT. The optimized lattice element parameters are presented for zero and full (15 mA) current case. Beam dynamics studies have been carried out using an envelope tracing code Trace-3D. Required beam deflection angle due to the chopper housed inside the MEBT for beam chopping has also been estimated. (author)

  12. Test bench to commission a third ion source beam line and a newly designed extraction system.

    Science.gov (United States)

    Winkelmann, T; Cee, R; Haberer, T; Naas, B; Peters, A

    2012-02-01

    The HIT (Heidelberg Ion Beam Therapy Center) is the first hospital-based treatment facility in Europe where patients can be irradiated with protons and carbon ions. Since the commissioning starting in 2006 two 14.5 GHz electron cyclotron resonance ion sources are routinely used to produce a variety of ion beams from protons up to oxygen. In the future a helium beam for regular patient treatment is requested, therefore a third ion source (Supernanogan source from PANTECHNIK S.A.) will be integrated. This third ECR source with a newly designed extraction system and a spectrometer line is installed at a test bench at HIT to commission and validate this section. Measurements with different extraction system setups will be presented to show the improvement of beam quality for helium, proton, and carbon beams. An outlook to the possible integration scheme of the new ion source into the production facility will be discussed. PMID:22380336

  13. Test bench to commission a third ion source beam line and a newly designed extraction system

    International Nuclear Information System (INIS)

    The HIT (Heidelberg Ion Beam Therapy Center) is the first hospital-based treatment facility in Europe where patients can be irradiated with protons and carbon ions. Since the commissioning starting in 2006 two 14.5 GHz electron cyclotron resonance ion sources are routinely used to produce a variety of ion beams from protons up to oxygen. In the future a helium beam for regular patient treatment is requested, therefore a third ion source (Supernanogan source from PANTECHNIK S.A.) will be integrated. This third ECR source with a newly designed extraction system and a spectrometer line is installed at a test bench at HIT to commission and validate this section. Measurements with different extraction system setups will be presented to show the improvement of beam quality for helium, proton, and carbon beams. An outlook to the possible integration scheme of the new ion source into the production facility will be discussed.

  14. Mechanical Design of the Injection Beam Line of Small Medical Cyclotron

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    The injection beam line is a key device for beam transport of the small medical cyclotron, giving direct influence to the beam quality of the cyclotron. According to the medical needs of the cyclotron, the overall length of the injection beam line is as short as possible,

  15. Design of the low energy beam transport line between CARIBU and the EBIS charge breeder

    International Nuclear Information System (INIS)

    An Electron Beam Ion Source Charge Breeder (EBIS-CB) has been developed to breed radioactive beams from the CAlifornium Rare Isotope Breeder Upgrade (CARIBU) facility at ATLAS. The EBIS-CB will replace the existing ECR charge breeder to increase the intensity and improve the purity of reaccelerated radioactive ion beams. The EBIS-CB is in the final stage of off-line commissioning. Currently, we are developing a low energy beam transport (LEBT) system to transfer CARIBU beams to the EBIS-CB. As was originally planned, an RFQ cooler-buncher will precede the EBIS-CB. Recently, it was decided to include a multi-reflection time-of-flight (MR-TOF) mass-spectrometer following the RFQ. MR-TOF is a relatively new technology used to purify beams with a mass-resolving power up to 3×105 as was demonstrated in experiments at CERN/ISOLDE. Very high purity singly-charged radioactive ion beams will be injected into the EBIS for charge breeding and due to its inherent properties, the EBIS-CB will maintain the purity of the charge bred beams. Possible contamination of residual gas ions will be greatly suppressed by achieving ultra-high vacuum in the EBIS trap. This paper will present and discuss the design of the LEBT and the overall integration of the EBIS-CB into ATLAS

  16. Design of the medium energy beam transport (MEBT) line for the rare ion beam project at VECC

    International Nuclear Information System (INIS)

    The design of a 24 m long MEBT line connecting the accelerator LINAC 3 with LINAC 4 of the VECC-RIB project is presented. The design goal is to achieve a optimal solution for the transport of heavy ion beams, emerging from LINAC 3 with the mean energy of 414 KeV/u and q/A ≥ 1/14 so that the beam is well matched both in transverse and longitudinal direction at the entry of the LINAC 4. A charge stripper is placed before LINAC 4 in order to achieve higher charge to mass ratio (q/A ≥ 1/7). The presence of the charge stripper requires that the alpha and beta parameters of the beam both in X and Y plane should be very small at the charge stripper so that emittance blow up is less. The restrictions of space in the site compel us to make the line about 14 m long before it can be bent in a 90 degree achromatic bend. As we are using a charge stripper, mass dispersion must be high at the intermediate focal point between the two dipole magnets of the achromatic bend to select the desired ion species for acceleration in the subsequent acceleration stages. This rather long length (∼ 24 m) of the beam line requires two rebunchers to match the beam longitudinally at the entry of the LINAC 4. In this paper, the step by step procedure of achieving various requirements, viz, minimization of alpha and beta at the stripper, achromatic bend with appreciable mass dispersion in between the bending magnets and beam matching at LINAC 4 could be effectively met. (author)

  17. Design of active feedback controller used in the infrared beam line of SSRF

    International Nuclear Information System (INIS)

    Background: The infrared beam line consists of many kinds of optical components that are susceptible to the external mechanical vibration, which will be further amplified by the long optical paths to seriously destroy the stability of infrared beam position. Purpose: The active feedback controller is used to stabilize the infrared beam position disturbed by the external environment. Methods: The design of the active feedback controller used in the infrared beam line of SSRF was proposed in this paper firstly, which included its background, light-path layout and operating process. Subsequently, the selections of the crucial components such as detector and actuator were discussed in details. Finally, the correction compensator design and its experimental test were also presented. The correction compensator design was realized by utilizing the frequency response method, and tested in time domain, frequency domain and mathematical model simulation of the controlled object. Results: The experimental tests included time domain step response signal of the controller, the time domain signal and its relevant magnitude spectrum in frequency domain due to the light source simulation vibration. Conclusion: The results show that the maximum effective operating band is 250 Hz and the maximum steady error is 5 μm. (authors)

  18. Design and end chamfer simulation of PEFP beam line curved dipole magnets

    Institute of Scientific and Technical Information of China (English)

    ZHU Ying-Shun; YANG Mei; ZHANG Zhuo; CHEN Wan; YIN Bao-Gui; SHI Cai-Tu; KANG Wen

    2011-01-01

    The design, fabrication and field measurement of 11 DC curved dipole magnets for the PEFP Beam Line have been completed. In this paper, a design method for a complex end chamfer using OPERA-3D is proposed. The conventional method for estimating chamfer shape is extended and applied to a curved dipole magnet by a coordinate transformation. Using the interface with CAD software, the complex end chamfer is modeled and fully determined by 3D simulation to meet the field uniformity requirement. The magnetic field measurement results are in good agreement with the simulation. The design considerations, field simulation results, end chamfer development process and measurement results are presented in detail.

  19. Improved design of proton source and low energy beam transport line for European Spallation Source

    Science.gov (United States)

    Neri, L.; Celona, L.; Gammino, S.; Mascali, D.; Castro, G.; Torrisi, G.; Cheymol, B.; Ponton, A.; Galatà, A.; Patti, G.; Gozzo, A.; Lega, L.; Ciavola, G.

    2014-02-01

    The design update of the European Spallation Source (ESS) accelerator is almost complete and the construction of the prototype of the microwave discharge ion source able to provide a proton beam current larger than 70 mA to the 3.6 MeV Radio Frequency Quadrupole (RFQ) started. The source named PS-ESS (Proton Source for ESS) was designed with a flexible magnetic system and an extraction system able to merge conservative solutions with significant advances. The ESS injector has taken advantage of recent theoretical updates and new plasma diagnostics tools developed at INFN-LNS (Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare). The design strategy considers the PS-ESS and the low energy beam transport line as a whole, where the proton beam behaves like an almost neutralized non-thermalized plasma. Innovative solutions have been used as hereinafter described. Thermo-mechanical optimization has been performed to withstand the chopped beam and the misaligned focused beam over the RFQ input collimator; the results are reported here.

  20. Improved design of proton source and low energy beam transport line for European Spallation Source

    Energy Technology Data Exchange (ETDEWEB)

    Neri, L., E-mail: neri@lns.infn.it; Celona, L.; Gammino, S.; Mascali, D.; Castro, G.; Ciavola, G. [Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare, Via S. Sofia 62, 95123 Catania (Italy); Torrisi, G. [Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare, Via S. Sofia 62, 95123 Catania (Italy); Dipartimento di Ingegneria dell’Informazione, delle Infrastrutture e dell’Energia Sostenibile, Università Mediterranea di Reggio Calabria, Via Graziella, 89122 Reggio Calabria (Italy); Cheymol, B.; Ponton, A. [European Spallation Source ESS AB, Lund (Sweden); Galatà, A. [Laboratori Nazionali di Legnaro, Istituto Nazionale di Fisica Nucleare, Viale dell' università 2, 35020 Legnaro (Italy); Patti, G. [Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare, Via S. Sofia 62, 95123 Catania (Italy); Laboratori Nazionali di Legnaro, Istituto Nazionale di Fisica Nucleare, Viale dell' università 2, 35020 Legnaro (Italy); Gozzo, A.; Lega, L. [Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare, Via S. Sofia 62, 95123 Catania (Italy); Dipartimento di Ingegneria Informatica e delle Telecomunicazioni, Università degli Studi di Catania, Viale Andrea Doria 6, 95123 Catania (Italy)

    2014-02-15

    The design update of the European Spallation Source (ESS) accelerator is almost complete and the construction of the prototype of the microwave discharge ion source able to provide a proton beam current larger than 70 mA to the 3.6 MeV Radio Frequency Quadrupole (RFQ) started. The source named PS-ESS (Proton Source for ESS) was designed with a flexible magnetic system and an extraction system able to merge conservative solutions with significant advances. The ESS injector has taken advantage of recent theoretical updates and new plasma diagnostics tools developed at INFN-LNS (Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare). The design strategy considers the PS-ESS and the low energy beam transport line as a whole, where the proton beam behaves like an almost neutralized non-thermalized plasma. Innovative solutions have been used as hereinafter described. Thermo-mechanical optimization has been performed to withstand the chopped beam and the misaligned focused beam over the RFQ input collimator; the results are reported here.

  1. Mechanical Design of a Heavy Ion Beam Dump for the RIA Fragmentation Line

    CERN Document Server

    Stein, Werner; Conner, David L

    2005-01-01

    The RIA fragmentation line requires a beam stop for the primary beam downstream of the first dipole magnet. The beam may consist of U, Ca, Sn, Kr, or O ions. with a variety of power densities. The configuration with highest power density is for the U beam, with a spot size of 3 cm x 3 cm and a total power of up to 300 kW. The mechanical design of the dump that meets these criteria consists of a 50 cm diameter aluminum wheel with water coolant channels. A hollow drive shaft supplies the coolant water and connects the wheel to an electrical motor located in an air space in the floor above the dump. The beam strikes the wheel along the outer perimeter and passes through a thin window of aluminum where 10% of its power is absorbed and the remainder of the beam is absorbed in flowing water behind the window. Rotation of the wheel at 400 RPM results in maximum aluminum temperatures below 100 C and acceptably low thermal stresses of 5 ksi. Rotating the wheel also results in low radiation damage levels by spreading t...

  2. Electron beam optics design of variable energy beam transport line for a tunable infra-red free electron laser at RRCAT

    International Nuclear Information System (INIS)

    A variable energy electron beam transport line has been designed to transport a 15-25 MeV electron beam from the injector linac to the undulator of a tuneable infra-red free electron laser (IR-FEL) being built at the Raja Ramanna Centre for Advanced Technology ( RRCAT). Beam optics of this transport line, which uses a dog-leg type bend, has been designed to match the twiss parameters of the beam to that of the undulator as per FEL design requirements and keep the beam envelop within acceptable limits through out the transport line. In this paper, we discuss the evolution of design of electron beam optics from the linac to the undulator. (author)

  3. The new vertical neutron beam line at the CERN n-TOF facility design and outlook on the performance

    International Nuclear Information System (INIS)

    At the neutron time-of-flight facility n-TOF at CERN a new vertical beam line was constructed in 2014, in order to extend the experimental possibilities at this facility to an even wider range of challenging cross-section measurements of interest in astrophysics, nuclear technology and medical physics. The design of the beam line and the experimental hall was based on FLUKA Monte Carlo simulations, aiming at maximizing the neutron flux, reducing the beam halo and minimizing the background from neutrons interacting with the collimator or back-scattered in the beam dump. The present paper gives an overview on the design of the beam line and the relevant elements and provides an outlook on the expected performance regarding the neutron beam intensity, shape and energy resolution, as well as the neutron and photon backgrounds

  4. The new vertical neutron beam line at the CERN n-TOF facility design and outlook on the performance

    Energy Technology Data Exchange (ETDEWEB)

    Weiß, C., E-mail: christina.weiss@cern.ch [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Chiaveri, E.; Girod, S.; Vlachoudis, V.; Aberle, O. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Barros, S. [Instituto Tecnológico e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Lisboa (Portugal); Bergström, I. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Berthoumieux, E. [Commissariat à l’Énergie Atomique (CEA) Saclay – Irfu, Gif-sur-Yvette (France); Calviani, M. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Guerrero, C.; Sabaté-Gilarte, M. [Universidad de Sevilla (Spain); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Tsinganis, A. [European Organization for Nuclear Research (CERN), Geneva (Switzerland); National Technical University of Athens (NTUA) (Greece); Andrzejewski, J. [Uniwersytet Łódzki, Lodz (Poland); Audouin, L. [Centre National de la Recherche Scientifique/IN2P3 – IPN, Orsay (France); Bacak, M. [Atominstitut, Technische Universität Wien (Austria); Balibrea-Correa, J. [Centro de Investigaciones Energeticas Medioambientales y Tecnológicas (CIEMAT), Madrid (Spain); Barbagallo, M. [Istituto Nazionale di Fisica Nucleare, Bari (Italy); Bécares, V. [Centro de Investigaciones Energeticas Medioambientales y Tecnológicas (CIEMAT), Madrid (Spain); and others

    2015-11-01

    At the neutron time-of-flight facility n-TOF at CERN a new vertical beam line was constructed in 2014, in order to extend the experimental possibilities at this facility to an even wider range of challenging cross-section measurements of interest in astrophysics, nuclear technology and medical physics. The design of the beam line and the experimental hall was based on FLUKA Monte Carlo simulations, aiming at maximizing the neutron flux, reducing the beam halo and minimizing the background from neutrons interacting with the collimator or back-scattered in the beam dump. The present paper gives an overview on the design of the beam line and the relevant elements and provides an outlook on the expected performance regarding the neutron beam intensity, shape and energy resolution, as well as the neutron and photon backgrounds.

  5. Mechanical design and development of analyzing magnet for the RIB charge breeder beam line

    International Nuclear Information System (INIS)

    An iron dominated analyzing magnet of uniform peak field 0.6 T has been developed for Radioactive Ion Beam (RIB) charge breeder beam line at VECC, Kolkata. It has two room temperature coils made of copper having channels for passage of cooling water. The other important parts of the magnet includes two yokes, two poles, vacuum chamber, view port, iron plates and the support structures. The most important properties of magnets designed and fabricated for this application is the need for high field quality. The magnet assembly has got overall dimensions of 1.1 metres x 0.91 metres x 0.63 metres and the required field uniformity is 6 x 10-4 over pole width of ± 2.5 cm. The most critical parameter that has to be maintained to achieve the desired magnetic field is the pole gap of 80 ± 0.25 rom.This paper describes in detail about the mechanical design, coil cooling analysis, development and assembly of this magnet. (author)

  6. Design of medium energy beam transport line between the RFQ and the Linac in the radioactive ion beam facility at VECC, Kolkata

    Indian Academy of Sciences (India)

    S Dechoudhury; Vaishali Naik; Manas Mondal; Hemendra Kumar Pandey; Avik Chatterjee; Dirtha Sanyal; Debasis Bhowmick; Alok Chakrabarti

    2010-09-01

    The design of a medium energy beam transport (MEBT) line comprising of a re-buncher and four quadrupoles, two upstream and the other two downstream of the re-buncher, has been presented. The design was done to ensure almost 100% transport of heavy-ion beams of about 99 keV/u energy from RFQ having a / not less than 1/14 through the re-buncher and then through IH Linac of about 0.6 m length in which beam would be accelerated to about 185 keV/u. The re-buncher has been designed to operate at 37.8 MHz, the resonating frequency of both the RFQ and the IH Linac. The entire beam line has been installed and recently O5+ beam from RFQ has been transported through the re-buncher and subsequently accelerated in the IH Linac successfully.

  7. Impact of the New CLIC Beam Parameters on the Design of the Post-Collision Line and its Exit Window

    CERN Document Server

    Ferrari, A

    2008-01-01

    Following the recent modification of the CLIC beam parameters, we present an updated design of the post-collision line. As a result of the increase of the beamstrahlung photon cone size, the separation of the outgoing beams by the vertical magnetic chicane is more difficult, but still possible. The main changes in the post-collision line design include the implementation of a common dump for the wrong-sign charged particles of the coherent pairs and for the low-energy tails of the disrupted beam, as well as a significant reduction of the overall lattice length (allowing removal of the large refocusing quadrupoles). The thermal and mechanical stresses in the new exit window, 150 m downstream of the interaction point, were computed. We conclude that, despite the recent changes of the CLIC beam parameters and the necessary modifications of the post-collision line and its exit window, their performance is not significantly affected.

  8. Design and construction of UVSOR-BL4A2 beam line for nano-structure processing

    CERN Document Server

    Takezoe, N; Tanaka, T; Kurosawa, K; Nonogaki, Y; Noda, H; Mekaru, H; Urisu, T

    2001-01-01

    We have designed and constructed a new beam line BL4A2 at UVSOR mainly for nano-structure fabrication based on synchrotron radiation stimulated surface photochemical reactions. In order to obtain high-photon flux, we use white ray beam focused with only one mirror. The beam line is connected with ultra-high vacuum scanning tunneling microscope for in-situ atomic scale observations, low energy electron diffraction and Auger electron spectroscope for surface crystal structure characterization, and photo-stimulated surface reaction chamber. In order to monitor the optical properties with atomic scale, a near field optical microscope is planned to be installed.

  9. Design of the extraction arc for the 2{sup nd} beam line of the free-electron laser FLASH

    Energy Technology Data Exchange (ETDEWEB)

    Scholz, Matthias

    2014-01-15

    In this thesis, I deal with the design of the extraction arc for the second beam line of FLASH, an FEL (Free-Electron Laser) user facility at DESY Hamburg. Both beam lines will use the same linear accelerator and their separation will take place behind the last accelerating module. I present the constraints for the extraction arc given by the beam line layout of the existing machine, by the building environment of the new beam line and in particular, by coherent synchrotron radiation (CSR). The impact from CSR is presented, and I show how to mitigate these effects and what that means for the beam line design. The optimization of the extraction arc was done applying the downhill simplex algorithm which is presented, first in its basic form to explain the operation principle and then in a more advanced version as used in the applied program. I introduce in this thesis the final layout of the extraction arc including the following matching section. This layout fulfills all given constraints and can provide the required electron beam quality for FEL operation. In order to prove this, I present start-to-end simulations for different bunch charges and for two different wavelengths.

  10. Design of the extraction arc for the 2nd beam line of the free-electron laser FLASH

    International Nuclear Information System (INIS)

    In this thesis, I deal with the design of the extraction arc for the second beam line of FLASH, an FEL (Free-Electron Laser) user facility at DESY Hamburg. Both beam lines will use the same linear accelerator and their separation will take place behind the last accelerating module. I present the constraints for the extraction arc given by the beam line layout of the existing machine, by the building environment of the new beam line and in particular, by coherent synchrotron radiation (CSR). The impact from CSR is presented, and I show how to mitigate these effects and what that means for the beam line design. The optimization of the extraction arc was done applying the downhill simplex algorithm which is presented, first in its basic form to explain the operation principle and then in a more advanced version as used in the applied program. I introduce in this thesis the final layout of the extraction arc including the following matching section. This layout fulfills all given constraints and can provide the required electron beam quality for FEL operation. In order to prove this, I present start-to-end simulations for different bunch charges and for two different wavelengths.

  11. Conceptual design report for the UNI-CAT beam line proposal

    International Nuclear Information System (INIS)

    The overall thrusts of UNI-CAT (University-National Laboratory- Industry Collaborative Access Team) are research at the cutting edge of physics, chemistry, biology, materials science, chemical engineering, polymer science, and geology; and education of a new generation of scientists in the use of synchrotron radiation to probe the structure, chemistry, and dynamic behavior of materials. The UNI-CAT proposal is to develop an APS sector that includes a bending magnet beam line and an insertion device beam line. The APS type-A undulator is the preferred choice for the insertion device. 8 figs, 6 refs

  12. Design of a synchrotron radiation detector for the test beam lines at the Superconducting Super Collider Laboratory

    International Nuclear Information System (INIS)

    As part of the particle- and momentum-tagging instrumentation required for the test beam lines of the Superconducting Super Collider (SSC), the synchrotron radiation detector (SRD) was designed to provide electron tagging at momentum above 75 GeV. In a parallel effort to the three test beam lines at the SSC, schedule demands required testing and calibration operations to be initiated at Fermilab. Synchrotron radiation detectors also were to be installed in the NM and MW beam lines at Femilab before the test beam lines at the SSC would become operational. The SRD is the last instrument in a series of three used in the SSC test beam fines. It follows a 20-m drift section of beam tube downstream of the last silicon strip detector. A bending dipole just in of the last silicon strip detector produces the synchrotron radiation that is detected in a 50-mm-square cross section NaI crystal. A secondary scintillator made of Bicron BC-400 plastic is used to discriminate whether it is synchrotron radiation or a stray particle that causes the triggering of the NaI crystal's photo multiplier tube (PMT)

  13. Design of a beam transport line between the RFQ and the DTL for the 1-GeV proton linac

    International Nuclear Information System (INIS)

    A beam transport line between the RFQ and the drift tube linac (DTL) for the 1-GeV proton linac was designed using four computer codes, MAGIC, BTSCF, BTFIT, and LEBT. The last three codes include the effects of the space-charge. The calculated results show no increase in the transverse emittance and about a 20%-increase in the longitudinal emittance for a 20-mA bunched proton beam. Properties of the beam line are studied in connection with the effects on the final beam qualities after a long acceleration with the 1-GeV proton linac. The effects of transverse mismatch at the DTL injection, arising from the difference in the calculation method between the code BTSCF and LEBT, are discussed. (author)

  14. Electromagnetic design and development of a combined function horizontal and vertical dipole steerer magnet for medium energy beam transport line

    International Nuclear Information System (INIS)

    Medium Energy Beam Transport (MEBT) line is required to match the optical functions between the RFQ and SRF cavities/DTL cavities.The primary function of the MEBT lines is to keep the emittance growth of the output beam as low as possible in a highly space charge environment at low energies. The transverse focusing of the beam is achieved by strong focusing quadrupoles and the longitudinal dynamics is achieved by the buncher cavities. The Dipole Steerers serve the function of a control element to achieve the desired transverse beam position. To minimize the emittance growth high magnetic field rigidity is required in a highly constrained longitudinal space for these corrector magnets. The design and development of an air-cooled dipole steerer magnet has been done for an integral dipole field of 2.1mT-m in a Good Field Region (GFR) of 23 mm diameter with Integral Field homogeneity better than 0.5%. Electromagnetic field simulations were done using 3D-FEM simulation software OPERA. Error sensitivity studies have been carried out to specify the manufacturing tolerances to estimate and minimize the beam transmission loss due to likely misalignments and rotation of the magnet. A combined function dipole corrector magnet has been designed and fabricated at the Control Instrumentation Division, BARC. This paper discusses measurement results of a combined function dipole steerer for MEBT line for Proton (H+) beam at 2.5 MeV. (author)

  15. Design of Air-Cooled Beam Dump for Extraction Line of PS Booster

    CERN Document Server

    Perillo-Marcone, A; Venturi, V; Antonakakis, T; Vlachoudis, V; Nowak, E; Mason, G; Battistin, M; Czapski, M; Sgobba, S

    2013-01-01

    A new beam dump has been designed, which withstands the future proton beam extracted from the Proton Syncrotron Booster (PSB) at CERN, consisting of up to 1E14 protons per pulse at 2 GeV after its upgrade in 2018/2019. In order to be able to efficiently release the deposited heat, the new dump will be made out of a single cylindrical block of a copper alloy and cooled by forced ventilation. In order to determine the energy density distribution deposited by the beam in the dump, Monte Carlo simulations were performed using FLUKA, and thermomechanical analyses carried out by importing the energy density into Ansys. In addition, CFD simulations of the airflow were carried out in order to accurately estimate the heat transfer convection coefficient on the surface of the dump. This paper describes the design process and highlights the constraints of integrating a new dump for increased beam power into the existing facility.

  16. Sub-14 nm HSQ line patterning by e-beam dose proximity effect correction assisted with designed line CD/pitch split

    Science.gov (United States)

    Chen, Wei-Su; Yang, Chu-Ya; Lo, Chiung Yu; Wei, Hung-Wen; Chen, Frederick T.; Ku, Tzu-Kun

    2013-03-01

    New applications on memory and logic devices need to form line shape pattern below 20 nm. Most of the prior articles for studying HSQ line CD resolution applied hot or cold (non-room temperature (RT)) development, salty development, KOH-based development or high concentration TMAH developer (like 25%) to push CD resolution to below 10 nm but these methods are not standard IC process compatible with 2.38% TMAH development at RT. E-beam lithography processes are applied to investigate CD resolution on RRAM film stacking of TiN/Ti/HfOx with or without proximity effect correction (PEC). Both dose and shape (line CD and pitch) modulations are applied in this study to obtain finest line width resolution using IC process compatible 2.38% TMAH developer at RT. Experimental results are summarized below. Lowest base dose of HSQ for pattern to be resolvable is larger than 1,000 (μC/cm2). Smallest line CD of 13.1 nm for designed CD of 5 nm (G4) is resolved to 2 separate lines on R1st dense-line pattern with e-beam dose of 5,000 (μC/cm2) assisted by dose PEC. Two lines of R1st dense-pattern is merged to single line of 14.7 nm at 10,000 (μC/cm2). 2lines dense-line pattern is clearly resolved to 2 separate lines at 1,500 (μC/cm2) but merged to one line at 2,000 (μC/cm2). Iso-line on the right of two dense-lines of 2lines pattern contributes backscattered dose which increases the line width. 5lines dense-line pattern could only resolve to 18.3 nm. Iso-line R1st_1L is resolvable to 18.5 nm with uniform distribution of CD across the line and 13.6 nm is also resolved with more rough line edge. In summary, sub-14 nm line width of HSQ could be resolved by the combination of e-beam dose and shape modulations using standard 2.38% TAMH developer. This process is suitable for applications using metal oxide films.

  17. Design of UHV chamber assembly and mirror mounts for high resolution VUV beam line at INDUS-1

    International Nuclear Information System (INIS)

    The reflecting optical system is designed for the high resolution VUV spectroscopy facility to be installed at INDUS-1. The fore-optics system consists of three cylindrical mirrors (M1, M2 and M3) to accept a 60 mrad (horizontal) x 6 mrad (vertical) diverging synchrotron beam from the storage ring in order to focus the image on the entrance slit of the vacuum spectrometer located at 13 m from the source point. In this paper we present some important details regarding mechanical design of the high resolution beam line consisting of mirror mounts, UHV chambers, associated mechanisms and beam pipes. The mirrors are mounted in an adjustable three point kinematic holder. In addition, these mounts are provided with a multi-plane alignment provision. Mirror mounts are placed inside VHV chambers which are provided with three translational and two rotational movements to facilitate initial as well as final on-line fine-tuned alignments. Beam pipes are connected to the VHV chambers through flanged bellows. Chambers, associated mechanisms, beam pipes with its non-rigid support and related pumping stations are positioned in the support structure rigidly. (author). 2 figs

  18. Design of the Prototype Low Energy Beam Transport Line for the Spallation Neutron Source

    International Nuclear Information System (INIS)

    The design of the Spallation Neutron Source (SNS) prototype low-energy beam transport (LEBT) system is discussed. This LEBT must transfer 35 mA of H- current from the ion source outlet aperture to the entrance of the radio-frequency quadrupole (RFQ). The plasma generator is a radio frequency-driven multicusp source, operated at 6% duty factor (1 ms, 60 Hz). The entire LEBT configuration is electrostatic, with a high-voltage extraction gap followed by two sets of einzel lenses. The second einzel lens will be split into four quadrants to permit the application of transverse steering and beam chopping fields. The H- ion source emits a gas flow into the LEBT that must be efficiently pumped to reduce stripping losses of the H- ions. Therefore, an efficient electrode design is incorporated to reduce the gas pressure between the electrodes. Alignment requirements and related issues will also be discussed

  19. Design of High-Gain and Beam Steering Antennas Using a New Planar Folded-Line Metamaterial Structure

    OpenAIRE

    Minh Thuy Le; Quoc Cuong Nguyen; Tan Phu Vuong

    2014-01-01

    In the last few years, there has been growing interest in employing metamaterials (MTMs) to enhance antenna gain. In this paper we proposed a novel structure of planar folded-line left-handed metamaterial (FL-LHM) and applied it to improve the gain of three 5.8 GHz microstrip antenna types: a circularly polarized patch antenna, an antenna array, and a beam steering antenna. The planar FL-LHM structure was designed based on transmission line analysis. Their scattering parameters were obtained ...

  20. Design, fabrication and testing of elliptical crystal bender for the EXAFS beam-line at INDUS-II synchrotron source

    Indian Academy of Sciences (India)

    N C Das; S N Jha; D Bhattacharyya; A K Poswal; A K Sinha; V K Mishra

    2004-10-01

    An extended X-ray absorption fine structure (EXAFS) beam-line for X-ray absorption studies using energy dispersive geometry and position sensitive detector is being developed for the INDUS-II synchrotron source. The optical design of the beam-line has been completed based on the working principle that a single crystal bent in the shape of an ellipse by a crystal bender would act as a dispersing as well as focusing element. The heart of the beam-line is the crystal bender which has been designed on the basis of the principle of four-point bending and has been fabricated indigenously. The crystal bender is capable of producing pre-defined elliptical curvature on a crystal surface by applying different couples at the two-ends of the crystal which has variable width along its length. The focusing property of the crystal bender has been tested using a laser source and has been compared with the theoretically simulated results.

  1. A directly heated electron beam line source

    International Nuclear Information System (INIS)

    A 140-mm cathode length, Electron Beam Line Source with a high degree of focusing of the beam is constructed. The design principles and basic characteristic considerations for electron beam line source consists of parallel plate electrode geometric array as well as a beam power of 35kW are worked out. The dimensions of the beam at the work site are 1.25xl00mm. The gun is designed basically for the study of evaporation and deposition characteristic of refractory metals for laboratory use. However, it may be equally used for melting and casting of these metals. (author)

  2. Overview of the Conceptual Design of the Future VENUS Neutron Imaging Beam Line at the Spallation Neutron Source

    Science.gov (United States)

    Bilheux, Hassina; Herwig, Ken; Keener, Scott; Davis, Larry

    VENUS (Versatile Neutron Imaging Beam line at the Spallation Neutron Source) will be a world-class neutron-imaging instrument that will uniquely utilize the Spallation Neutron Source (SNS) time-of-flight (TOF) capabilities to measure and characterize objects across several length scales (mm to μm). When completed, VENUS will provide academia, industry and government laboratories with the opportunity to advance scientific research in areas such as energy, materials, additive manufacturing, geosciences, transportation, engineering, plant physiology, biology, etc. It is anticipated that a good portion of the VENUS user community will have a strong engineering/industrial research focus. Installed at Beam line 10 (BL10), VENUS will be a 25-m neutron imaging facility with the capability to fully illuminate (i.e., umbra illumination) a 20 cm x 20 cm detector area. The design allows for a 28 cm x 28 cm field of view when using the penumbra to 80% of the full illumination flux. A sample position at 20 m will be implemented for magnification measurements. The optical components are comprised of a series of selected apertures, T0 and bandwidth choppers, beam scrapers, a fast shutter to limit sample activation, and flight tubes filled with Helium. Techniques such as energy selective, Bragg edge and epithermal imaging will be available at VENUS.

  3. Design of Main Control Console Software in EAST Neutral Beam Injector's Control System for the First Beam Line

    Science.gov (United States)

    Wu, De-Yun; Hu, Chun-Dong; Sheng, Peng; Zhao, Yuan-Zhe; Zhang, Xiao-Dan; Cui, Qing-Long

    2013-10-01

    Neutral beam injector is one of the main plasma heating and plasma current driving methods for experimental advanced superconducting tokomaks (EAST). In order to realize visual operation of EAST neutral beam injector's control system (NBICS), main control console (MCC) is developed to work as the human-machine interface between the NBICS and physical operator. It can meet the requirements of visual control of NBICS by providing a user graphic interface. With the specific algorithms, the setup of power supply sequence is relatively independent and simple. Displaying the real-time feedback of the subsystems provides a reference for operators to monitor the status of the system. The MCC software runs on a Windows system and uses C++ language code while using client/server (C/S) mode, multithreading and cyclic redundancy check technology. The experimental results have proved that MCC provides a stability and reliability operation of NBICS and works as an effective man-machine interface at the same time.

  4. Design of a medium-energy beam-transport line with an anti-chopper for the JAERI/KEK project

    International Nuclear Information System (INIS)

    The medium-energy beam-transport line (MEBT) plays an important role in reducing beam loss in the JAERI/KEK project. A MEBT was designed two years ago, with good beam matching and lower beam loss. To further reduce beam loss during the transient time of the chopper to meet the new requirement from the DTL, a medium-energy beam-transport line with an anti-chopper has been designed. The 3.5 m long transport line consists of nine quadrupole magnets, three bunchers and four chopper/anti-chopper cavities. It accomplishes two tasks: matching the beam from the RFQ to the acceptance of the DTL and chopping the beam to produce gaps for injection into the rapid-cycling ring, which follows the linac. A RF Chopper and an anti-chopper have been adopted in the lattice, resulting in a clean chopping effect and no beam losses during the transient time. Details of the beam dynamics analysis are given

  5. Design of a medium-energy beam-transport line with an anti-chopper for the JAERI/KEK project

    International Nuclear Information System (INIS)

    The medium-energy beam-transport line (MEBT) plays an important role in reducing beam loss in the JAERI/KEK project. A MEBT was designed two years ago, with good beam matching and lower beam loss. To further reduce beam loss during the transient time of the chopper to meet the new requirement from the DTL, a medium-energy beam-transport line with an anti-chopper has been designed. The 3.5 m long transport line consists of nine quadrupole magnets, three bunchers and four chopper/anti-chopper cavities. It accomplishes two tasks: matching the beam from the RFQ to the acceptance of the DTL and chopping the beam to produce gaps for injection into the rapid-cycling ring, which follows the linac. An RF Chopper and an anti-chopper have been adopted in the lattice, resulting in a clean chopping effect, and no beam losses during the transient time. Details of the beam dynamics analysis are given. (author)

  6. Research and Design of a Sample Heater for Beam Line 6-2c Transmission X-ray Microscope

    Energy Technology Data Exchange (ETDEWEB)

    Policht, Veronica; /Loyola U., Chicago /SLAC

    2012-08-27

    There exists a need for environmental control of samples to be imaged by the Transmission X-Ray Microscope (TXM) at the SSRLs Beam Line 6-2c. In order to observe heat-driven chemical or morphological changes that normally occur in situ, microscopes require an additional component that effectively heats a given sample without heating any of the microscope elements. The confinement of the heat and other concerns about the heaters integrity limit which type of heater is appropriate for the TXM. The bulk of this research project entails researching different heating methods used previously in microscopes, but also in other industrial applications, with the goal of determining the best-fitting method, and finally in designing a preliminary sample heater.

  7. Design of a high-current low-energy beam transport line for an intense D-T/D-D neutron generator

    Science.gov (United States)

    Lu, Xiaolong; Wang, Junrun; Zhang, Yu; Li, Jianyi; Xia, Li; Zhang, Jie; Ding, Yanyan; Jiang, Bing; Huang, Zhiwu; Ma, Zhanwen; Wei, Zheng; Qian, Xiangping; Xu, Dapeng; Lan, Changlin; Yao, Zeen

    2016-03-01

    An intense D-T/D-D neutron generator is currently being developed at the Lanzhou University. The Cockcroft-Walton accelerator, as a part of the neutron generator, will be used to accelerate and transport the high-current low-energy beam from the duoplasmatron ion source to the rotating target. The design of a high-current low-energy beam transport (LEBT) line and the dynamics simulations of the mixed beam were carried out using the TRACK code. The results illustrate that the designed beam line facilitates smooth transportation of a deuteron beam of 40 mA, and the number of undesired ions can be reduced effectively using two apertures.

  8. BEAM TRANSFER LINES FOR THE SPALLATION NEUTRON SOURCE.

    Energy Technology Data Exchange (ETDEWEB)

    RAPARIA,D.; LEE,Y.Y.; WENG,W.T.; WEI,J.

    2002-04-08

    Beam transfer lines for the Spallation Neutron Source (SNS) are designed to have low beam losses for hand on maintenance while satisfying the facility footprint requirements. There are two main beam transfer lines, High Energy Beam Transport (HEBT) line which connect super conducting linac to the accumulator ring and Ring to Target Beam transport (RTBT) which transfers beam from accumulator ring to the target. HEBT line not only transfer the beam from linac to ring but also prepare beam for ring injection, correct the energy jitter from the linac, provide required energy spread for the ring injection, clean the transverse and longitudinal halo particles from the beam, determine the linac beam quality, and provide the protection to the accumulator ring. RTBT line transport the beam from ring to target while fulfilling the target requirements of beam size, maximum current density, beam moment on the target in case of ring extraction kicker failure. and protect the target from the ring fault conditions.

  9. Optical and mechanical design of the extended x-ray absorption fine structure (EXAFS) beam-line at Indus-II synchrotron source

    International Nuclear Information System (INIS)

    An extended x-ray absorption fine structure (EXAFS) beam line for x-ray absorption studies using energy dispersive geometry and position sensitive detector is being designed for the INDUS-II Synchrotron source. The beam line would be used for doing x-ray absorption experiments involving measurements of fme structures above the absorption edge of different species of atoms in a material The results of the above experiments would lead to the determination of different important structural parameters of materials viz.. inter-atomic distance. co-ordination number, degree of disorder and radial distribution function etc. The optical design of the beam line has been completed based on the working principle that a single crystal bent in the shape of an ellipse by a crystal bender would act as a dispersing as well as focusing element. The mechanical design of the beam line including the crystal bender has also been completed and discussed here. Calculations have been done to detennine the temperature profile on the different components of the beam line under exposure to synchrotron radiation and proper cooling channels have been designed to bring down the heat load on the components. (author)

  10. Beam line to S155

    CERN Multimedia

    1977-01-01

    The experiment S155 was designed by the Orsay (CSNM-CNRS) Collaboration to observe the properties of exotic light nuclei. It was installed in the PS neutrino tunnel. The photo shows a mass spectrometer (in the background) on line with the PS proton beam which arrives (bottom, right) from the fast extraction FE74. Roger Fergeau stands on the left. The alkaline isotopes produced in the carbon-uranium target heated at 2000°C were swiftly extracted, mass separated, and brought to a detector behind the shielding. Sodium 34 (11 protons and 23 neutrons) was observed and its half-life of only 5 ms was measured. The excited levels 2+ of Magnesium 30 and Magnesium 32 (Sodium descendants) were localised, and the magic number 20 was found to vanish. Thus, the discovery made earlier for Sodium 30 and Sodium 32, with the same apparatus, was confirmed. (See also photo 7706511.)

  11. Design of High-Gain and Beam Steering Antennas Using a New Planar Folded-Line Metamaterial Structure

    Directory of Open Access Journals (Sweden)

    Minh Thuy Le

    2014-01-01

    Full Text Available In the last few years, there has been growing interest in employing metamaterials (MTMs to enhance antenna gain. In this paper we proposed a novel structure of planar folded-line left-handed metamaterial (FL-LHM and applied it to improve the gain of three 5.8 GHz microstrip antenna types: a circularly polarized patch antenna, an antenna array, and a beam steering antenna. The planar FL-LHM structure was designed based on transmission line analysis. Their scattering parameters were obtained using a numerical model; the negative effective permittivity and permeability were then calculated from these parameters for the assessment of negative refraction index region. The S11 and radiation patterns of three fabricated antennas were measured; these results matched well with the simulation. We observed that the gain was increased up to 3 dBi for all the antennas. In addition, we were also able to maintain the circular polarization as well as the steering of the antenna without changing its dimensions.

  12. An experimental approach to the design of a scattering system for a proton therapy beam line dedicated to opthalmological applications

    International Nuclear Information System (INIS)

    Purpose: The development of a scattering system for a proton therapy beam line dedicated to ophtalmological applications. Methods and Materials: A protontherapy beam line has been developed for the treatment of uveal melanoma at the Orsay synchrocyclotron. The original 200 MeV proton beam is degraded to 76 MeV and the final beam characteristics (range, modulation, flatness, collimation) are obtained with beam modifiers in the treatment room. A passive scattering system is used to obtain a uniform dose distribution in the beam cross-section throughout 30 mm in diameter, with minimal losses in energy and dose rate. We have used an experimental approach for the scattering study. Results: An elliptical ring shaped from 0.1-mm thick lead is the solution we have adopted for the scattering system. For a modulated beam, a flatness of 1% is obtained on transverse profiles. The energy loss introduced by this scatterer is only 0.5 MeV, with no appreciable change in the range over the treatment field. For an unmodulated beam, 21% of intensity is lost when the scatterer is used. The distal and the lateral dose fall-off (90-10%) for a modulated beam are 2.6 mm. These last values are independent of the range and the modulation currently used for the ophtalmic applications. Conclusion: A specific passive scattering system can be adapted to a particular beam emittance. A systematic experimental approach can easily be undertaken to obtain the scatterer adapted for small irradiation fields in proton therapy

  13. The elettra beam line control system

    International Nuclear Information System (INIS)

    Elettra is a third generation Synchrotron Light Source located in Trieste (Italy). It consists of a full energy linac injector and a storage ring with beam energies between 1.5 and 2 GeV. The facility is scheduled to be operational by end 1993. For the whole project 22 beam lines from insertion devices are foreseen, each of them is composed of a large number of measurement and controls instruments, most of them embedded in intelligent devices; in addition each beam line can be considered unique compared to the others, having been designed to provide a different kind of synchrotron radiation. This results in a large not homogenous environment where more than 200,000 physical points have to be controlled. A joint team composed of Softeco Sismat and Digital Equipment has developed a fully automated beam line control system able to give full remote controls, with different kind of access rights, to beam line users and beam line specialists as well as a full integration with experiment control systems. ((orig.))

  14. Beam director design report

    Energy Technology Data Exchange (ETDEWEB)

    Younger, F.C.

    1986-08-01

    A design and fabrication effort for a beam director is documented. The conceptual design provides for the beam to pass first through a bending and focusing system (or ''achromat''), through a second achromat, through an air-to-vacuum interface (the ''beam window''), and finally through the vernier steering system. Following an initial concept study for a beam director, a prototype permanent magnet 30/sup 0/ beam-bending achromat and prototype vernier steering magnet were designed and built. In volume II, copies are included of the funding instruments, requests for quotations, purchase orders, a complete set of as-built drawings, magnetic measurement reports, the concept design report, and the final report on the design and fabrication project. (LEW)

  15. Beam director design report

    International Nuclear Information System (INIS)

    A design and fabrication effort for a beam director is documented. The conceptual design provides for the beam to pass first through a bending and focusing system (or ''achromat''), through a second achromat, through an air-to-vacuum interface (the ''beam window''), and finally through the vernier steering system. Following an initial concept study for a beam director, a prototype permanent magnet 300 beam-bending achromat and prototype vernier steering magnet were designed and built. In volume II, copies are included of the funding instruments, requests for quotations, purchase orders, a complete set of as-built drawings, magnetic measurement reports, the concept design report, and the final report on the design and fabrication project

  16. Initial Beam Test of the Prototype Strip Line BPM

    Energy Technology Data Exchange (ETDEWEB)

    Kwon, Hyeok Jung; Kim, Han Sung; Seol, Kyung Tae; Ryu, Jin Yeong; Jang, Ji Ho; Cho, Yong Sub [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2011-10-15

    A beam position monitor (BPM) was developed which would be used for the Proton Engineering Frontier Project (PEFP) beam line. It is a strip line BPM which is commonly used one for the proton beam. The BPM cross section was designed with the SUPERFISH code and the matching section to the feed through was designed by the MWS code. The design parameters of the BPM are shown in Table 1. The designed BPM was fabricated to verify the manufacturing process and check its electrical performance. After the low power test at the test stand, the BPM was installed at the 20-MeV proton accelerator beam line as shown in Fig. 1

  17. Analysis of transmission efficiency of SSRF electron beam transfer lines

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    In this article, the main factors which influence transmission efficiency of the SSRF electron beam transfer lines are described, including physical requirements for magnet system, vacuum system, beam diagnostic system,trajectory correction system, etc. The dynamic simulation calculation and transmission efficiency analysis of the SSRF electron beam transfer lines are presented, and the studies show that the design purpose of efficient beam transmission and injection will be achieved.

  18. The appearance of beam lines

    Energy Technology Data Exchange (ETDEWEB)

    Carey, D.C.

    1993-05-01

    The combination of an existing graphics package with a large program like TRANSPORT has often resulted in considerable modification to the large program. Use of other graphics package has resulted in essentially having to repeat the work. This difficulty has been avoided in a modification of TRANSPORT which produce layouts of beam lines. Drawings of the reference trajectory and three-dimensional images of all magnets are made by the graphics package TOP DRAWER. Nothing specific to TOP DRAWER or any other graphics has been incorporated into TRANSPORT. If a user is with a different graphics package he or she can then begin usage of this alternate package essentially immediately.

  19. Upgrading of the beam diagnostic system of U-70 beam transfer lines

    CERN Document Server

    Kovaltsov, V I; Matyushin, A T; Milyutkin, V; Romanov, I; Seleznev, V; Sytin, A N; Clausen, M

    2001-01-01

    The beam diagnostic system of U-70 beam transfer lines (beam profiles, intensity and beam losses measurements) was designed in the beginning of 80-th on the base of 8-bit microprocessor, SUMMA hardware and home made serial communication link. Because of the maintenance problems the decision was taken to upgrade the hardware and software parts of the system.

  20. Beam line error analysis, position correction, and graphic processing

    International Nuclear Information System (INIS)

    A beam transport line error analysis and beam position correction code called ''EAC'' has been developed in association with a graphics and data post-processing package for TRANSPORT. Based on the linear optics design using TRANSPORT or other general optics codes, EAC independently analyzes effects of magnet misalignments, and systematic and statistical errors of magnetic fields, as well as the effects of the initial beam positions on the central trajectory and on the transverse beam emittance dilution. EAC also provides an efficient way to develop beam line trajectory correcting schemes. The post-processing package generates various types of graphics including beam line geometrical layout, plots of the Twiss parameters, and beam envelopes. It also generates an EAC input file, thus connecting EAC with general optics codes. EAC and the post-processing package are small codes that are easy to access and use. They have become useful tools for the design of transport lines at the Superconducting Super Collider Laboratory

  1. Applications of heat pipes for high thermal load beam lines

    International Nuclear Information System (INIS)

    The high flux beam produced by insertion devices often requires special heat removal techniques. For the optical elements used in such high thermal load beam lines the required precision demands a highly accurate design. Heat pipe cooling of critical elements of the x-1 beam line at the National Synchrotron Light Source is described. This method reduces vibrations caused by water cooling systems and simplifies the design. In some of these designs, deposited heat must be transferred through unbonded contact interfaces. A pinhole assembly and a beam position monitor designed for the x-1 beam line both transfer heat through such interfaces in an ultrahigh vacuum environment. The fundamental design objective is that of removing the heat with minimal interface thermal resistance. We present our test method and results for measuring the thermal resistance across metallic interfaces as a function of contact pressure. The design of some devices which utilize both heat pipes and thermal contact interfaces will also be described. (orig.)

  2. Product line design

    Czech Academy of Sciences Publication Activity Database

    Anderson, S. P.; Celik, Levent

    2015-01-01

    Roč. 157, May (2015), s. 517-526. ISSN 0022-0531 Institutional support: RVO:67985998 Keywords : product line design * product differentiation * second-degree price discrimination Subject RIV: AH - Economics Impact factor: 1.033, year: 2014

  3. Present status of design, installation and testing of electron gun and low energy beam transport line of electron Linac at VECC

    International Nuclear Information System (INIS)

    A key component of ANURIB (Advanced National Facility of Unstable and Rare Isotope Beams) project at VECC is a 2 mA, 30/50 MeV continuous-wave superconducting electron linear accelerator (e-Linac). The e-Linac has two sections - a 10 MeV Injector and an Accelerator section for further accelerating the beam to 30/50 MeV. The Injector comprises a 300 kV de thermionic electron gun with gridded cathode modulated at 650 MHz, low energy beam transport (LEBT) line and an injector cryo-module (ICM) that houses one 9-cell beta=1, 1.3 GHz niobium elliptical cavity. As an alternative to the 300 kV gun, a capture cryo-module (CCM) having two single-cell beta=1, 1.3 GHz niobium cavities that will allow the electron gun to be operated at 100 kV is also being developed. The CCM will pre-accelerate the beam from the gun prior to injection in the ICM. The e-Linac has been jointly designed with TRIUMF Canada. The ICM is being built by TRIUMF whereas the front-end of the injector is being built indigenously at VECC. Till the Rajarhat site for ANURIB is getting ready, an e-Linac test area is being setup at VECC Salt Lake campus. The Injector is being installed here and will be later moved to the new campus. The electron gun and several components of the LEBT line up to the CCM have been installed. Alignment and vacuum tests have also been completed. The LEBT line consists of steering magnets, solenoid magnets, diagnostics chamber and a room temperature 1.3 GHz buncher. Solenoid magnets are under fabrication and steering magnets have been procured. A dipole magnet and rf- deflector cavity for characterization of time structure of the beam has been designed and will be added to the LEBT line. In this report, the detail design of the various components and magnets along with present status of installation of the Injector will be presented. (author)

  4. Computer simulation of high current uranium beams for the injection beam line of the UNILAC

    International Nuclear Information System (INIS)

    In an attempt to generate an ion beam with high current and high brightness for the design ion, the computer code KOBRA3-INP has been used to evaluate the extraction system, the DC post-acceleration system as well as the quadrupole transport beam line, and to study the behavior of the ion beam in the combined system. (orig.)

  5. Beam instrumentation for the BNL Heavy Ion Transfer Line

    International Nuclear Information System (INIS)

    The Heavy Ion Transfer Line (HITL) was constructed to transport beams from the BNL Tandem Van de Graaff (TVDG) to be injected into the AGS. Because the beam line is approximately 2000 feet long and the particle rigidity is so low, 20 beam monitor boxes were placed along the line. The intensity ranges from 1 to 100 nanoAmps for the dc trace beam used for line set-up, to over 100 μA for the pulsed beam to be injected into the AGS. Profiles are measured using multiwire arrays (HARPS) while Faraday cups and beam transformers monitor the intensity. The electronics stations are operated through 3 Instrumentation Controllers networked to Apollo workstations in the TVDG and AGS control rooms. Details of the detectors and electronics designs and performance will be given

  6. Low-energy beam line at KVI

    NARCIS (Netherlands)

    Toprek, D.; Formanoy, I.; Brandenburg, S.

    2006-01-01

    This paper describes the redesign of the low-energy beam line at KVI. Redesigned and properties of the optical elements of the transport beam line is done by using the code COSY INFINITY in the third-order of approximation. The effects of fringe fields of the optical elements are also taken into acc

  7. Product line design

    Czech Academy of Sciences Publication Activity Database

    Anderson, S. P.; Celik, Levent

    2015-01-01

    Roč. 157, May (2015), s. 517-526. ISSN 0022-0531 R&D Projects: GA ČR(CZ) GA15-22540S Institutional support: PRVOUK-P23 Keywords : product line design * product differentiation * second-degree price discrimination Subject RIV: AH - Economics Impact factor: 1.033, year: 2014

  8. FFAG Beam Line for nuPIL - Neutrinos from PIon Beam Line

    Energy Technology Data Exchange (ETDEWEB)

    Lagrange, Jean-Baptiste [Fermilab; Pasternak, Jaroslaw [Rutherford; Bross, Alan [Fermilab; Liu, Ao [Fermilab; Appleby, Robert [Cockcroft Inst. Accel. Sci. Tech.; Tygier, Sam [Cockcroft Inst. Accel. Sci. Tech.

    2016-06-01

    The Long Baseline Neutrino Facilities (LBNF) program aims to deliver a neutrino beam for the Deep Underground Neutrino Experiment (DUNE). The current baseline for LBNF is a conventional magnetic horn and decay pipe system. Neutrinos from PIon beam Line (nuPIL) is a part of the optimization effort to optimize the LBNF. It consists of a pion beam line after the horn to clean the beam of high energy protons and wrong-sign pions before transporting them into a decay beam line, where instrumentation could be implemented. This paper focuses on the FFAG solution for this pion beam line. The resulting neutrino flux is also presented.

  9. Beam Stability of the LHC Beam Transfer Line TI8

    CERN Document Server

    Wenninger, Jörg; Kain, Verena; Uythoven, Jan

    2005-01-01

    Injection of beam into the LHC at 450 GeV/c proceeds over two 2.7 km long transfer lines from the SPS. The small aperture of the LHC at injection imposes tight constraints on the stability of the beam transfer. The first transfer line TI 8 was commissioned in the fall of 2004 with low intensity beam. Since the beam position monitor signal fluctuations were dominated by noise with low intensity beam, the beam stability could not be obtained from a simple comparison of consecutive trajectories. Instead model independent analysis (MIA) techniques as well as scraping on collimators were used to estimate the intrinsic stability of the transfer line. This paper presents the analysis methods and the resulting stability estimates.

  10. TFTR neutral beam injection system conceptual design

    International Nuclear Information System (INIS)

    Three subsystems are described in the following chapters: (1) Neutral Beam Injection Line; (2) Power Supplies; and (3) Controls. Each chapter contains two sections: (1) Functions and Design Requirements; this is a brief listing of the requirements of components of the subsystem. (2) Design Description; this section describes the design and cost estimates. The overall performance requirements of the neutral beam injection system are summarized. (MOW)

  11. Radioactive ion beam line of CSR

    International Nuclear Information System (INIS)

    A new radioactive ion beam line designed to work at higher energy equivalent up to a magnetic rigidity of 10.64 Tm is going to be constructed at Lanzhou. It is to connect the main ring and the experiment ring of the HIRFL-CSR complex. The separator is mirror-symmetrically configured both in geometry and magnet strength, achieving a point-point and parallel-parallel image at its intermediate focal plane with maximum spatial dispersion. Achromatism is automatically realized at the final focal plane. The total length is about 26 meters. Its resolution power of magnetic rigidity is 1200 at +- 1% momentum deviation and +- 25 mrad divergence simultaneously. With sextupole- and octupole- magnets carefully positioned and powered, second and third-order aberrations are corrected to a large extent. The magnet design has already fulfilled

  12. Perspectives for the VITO beam line at ISOLDE, CERN

    Directory of Open Access Journals (Sweden)

    Garcia Ruiz R. F.

    2015-01-01

    Full Text Available By using polarized ion beams in combination with the β-NMR technique, the Versatile Ion-polarized Techniques On-line (VITO experiment at ISOLDE, CERN links together expertise from different fields in an unique experimental setup. An overview of the experimental techniques and a general description of the newly designed beam line are presented. Potential uses in multidisciplinary research and perspectives for future experiments are discussed.

  13. Beamline for schools beam line training day

    CERN Multimedia

    Photo Service, CERN

    2014-01-01

    The first two teams to participate in CERN's Beamline for Schools project spent their second day at CERN learning the basics of beam physics, and visiting their experimental setup at the T9 beam line in CERN's East Hall on the Meyrin site.

  14. Construction of a pulsed MeV positron beam line

    Energy Technology Data Exchange (ETDEWEB)

    Masuno, Shin-ichi; Okada, Sohei; Kawasuso, Atsuo [Japan Atomic Energy Research Inst., Takasaki, Gunma (Japan). Takasaki Radiation Chemistry Research Establishment

    1997-03-01

    To develop a fast (1 MeV) and short pulsed (100 ps) positron beam which enables defect behavior analysis of bulk states of materials even at high temperatures where a usual positron source would melt, we have been performing design study and construction of the beam line in a three-year program since 1994. This report describes the components, design study results and experimental results of the completed parts until now. (author)

  15. Beam line for Schools: beyond expectations

    CERN Multimedia

    Cian O'Luanaigh

    2014-01-01

    Out of 292 proposals for CERN's first ever "Beam line for Schools" contest, two teams of high-school students – Odysseus' Comrades from Varvakios Pilot School in Athens, Greece and Dominicuscollege from Dominicus College in Nijmegen in the Netherlands – were selected to spend 10 days conducting their proposed experiments at the fully equipped T9 beam line on CERN's Meyrin site. Dedicated CERN staff and users from across the departments have put in a huge effort to ensure the success of the project.   Detector physicist Cenk Yidriz (centre, white helmet) explains the setup of the "Beamline for schools" experiment at the T9 beamline. It's finally beam time. After months of organisation, coding, engineering and even painting the experimental area, the T9 beam line is ready to deliver protons to experiments devised and built by high-school students. “They are here to collect data and experience the l...

  16. Applications of heat pipes for high thermal load beam lines

    International Nuclear Information System (INIS)

    The high flux beam produced by insertion devices often requires special heat removal techniques. For the optical elements used in such high thermal load beam lines, the required precision demands a highly accurate design. Heat pipe cooling of critical elements of the X-1 beam line at the National Synchrotron Light Source is described. This method reduces vibrations caused by water cooling systems and simplifies the design. In some of these designs, deposited heat must be transferred through unbonded contact interfaces. A pinhole assembly and a beam position monitor designed for the X-1 beam line both transfer heat through such interfaces in an ultrahigh vacuum environment. The fundamental design objective is that of removing the heat with minimal interface thermal resistance. We present our test method and results for measuring the thermal resistance across metallic interfaces as a function of contact pressure. The design of some devices which utilize both heat pipes and thermal contact interfaces will also be described. 12 refs., 8 figs

  17. The H line: a brand new beam line for fundamental physics at the J-PARC muon facility

    International Nuclear Information System (INIS)

    The muon facility, J-PARC (Muon Science Establishment; MUSE), has been operated since first beam in 2008. Starting with a 200 kW proton beam, the beam intensity has reached 3×106/ muons/s, the most intense pulsed muon beam in the world. A 2 cm thick graphite target permits the extraction of four secondary muon beams. A brand new beam line, the H line, is planned to be constructed. The new beam line is designed to have a large acceptance, will provide the ability to tune the momentum, and use a kicker magnet and/or Wien filter. This beam line will provide an intense beam for experiments that require high statistics and must occupy the experimental areas for a relatively long period.

  18. Beam line shielding calculations for an Electron Accelerator Mo-99 production facility

    Energy Technology Data Exchange (ETDEWEB)

    Mocko, Michal [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2016-05-03

    The purpose of this study is to evaluate the photon and neutron fields in and around the latest beam line design for the Mo-99 production facility. The radiation dose to the beam line components (quadrupoles, dipoles, beam stops and the linear accelerator) are calculated in the present report. The beam line design assumes placement of two cameras: infra red (IR) and optical transition radiation (OTR) for continuous monitoring of the beam spot on target during irradiation. The cameras will be placed off the beam axis offset in vertical direction. We explored typical shielding arrangements for the cameras and report the resulting neutron and photon dose fields.

  19. Experimental Program for the CLIC test facility 3 test beam line

    CERN Document Server

    Adli, E; Dobert, S; Olvegaard, M; Schulte, D; Syratchev, I; Lillestol, Reidar

    2010-01-01

    The CLIC Test Facility 3 Test Beam Line is the first prototype for the CLIC drive beam decelerator. Stable transport of the drive beam under deceleration is a mandatory component in the CLIC two-beam scheme. In the Test Beam Line more than 50% of the total energy will be extracted from a 150 MeV, 28 A electron drive beam, by the use of 16 power extraction and transfer structures. A number of experiments are foreseen to investigate the drive beam characteristics under deceleration in the Test Beam Line, including beam stability, beam blow up and the efficiency of the power extraction. General benchmarking of decelerator simulation and theory studies will also be performed. Specially designed instrumentation including precision BPMs, loss monitors and a time-resolved spectrometer dump will be used for the experiments. This paper describes the experimental program foreseen for the Test Beam Line, including the relevance of the results for the CLIC decelerator studies.

  20. Simulating the Beam-line at CERN's ISOLDE Experiment

    CERN Document Server

    McGrath, Casey

    2013-01-01

    Maximizing the optical matching along portions of the ISOLDE beam-line and automating this procedure will make it easier for scientists to determine what the strengths of the electrical elds of each beam-line element should be in order to reduce particle loss. Simulations are run using a program called MAD-X, however, certain issues were discovered that hindered an immediate success of the simulations. Specifically, the transfer matrices for electrostatic components like the switchyards, kickers, and electric quadrupoles were missing from the original coding. The primary aim of this project was to design these components using AutoCAD and then extract the transfer matrices using SIMION. Future work will then implement these transfer matrices into the MAD-X code to make the simulations of the beam-line more accurate.

  1. Requirements and guidelines for NSLS experimental beam line vacuum systems: Revision A

    International Nuclear Information System (INIS)

    Requirements are provided for NSLS beam line front ends and vacuum interlocks. Guidelines are provided for UHV beam line vacuum systems, including materials, vacuum hardware (pumps, valves, and flanges), acoustic delay lines and beam line fast valves, instrumentation, fabrication and testing, and the NSLS cleaning facility. Also discussed are the design review for experimenters' equipment that would be connected to the NSLS and acceptance tests for any beam line to be connected with the ring vacuum. Also appended are a description of the acoustic delay line as well as the NSLS vacuum standards and NSLS procedures

  2. Neutronics Assessments for a RIA Fragmentation Line Beam Dump Concept

    CERN Document Server

    Boles, Jason; Reyes, Susana; Stein, Werner

    2005-01-01

    Heavy ion and radiation transport calculations are in progress for conceptual beam dump designs for the fragmentation line of the proposed Rare Isotope Accelerator (RIA). Using the computer code PHITS, a preliminary design of a motor-driven rotating wheel beam dump and adjacent downstream multipole has been modeled. Selected results of these calculations are given, including neutron and proton flux in the wheel, absorbed dose and displacements per atom in the hub materials, and heating from prompt radiation and from decay heat in the multipole.

  3. Beam transfer line for food irradiation microtron at CAT

    International Nuclear Information System (INIS)

    A 10 MeV microtron is being developed at CAT for irradiation of food products. A beam transfer line comprising a 90 deg bending magnet, a quadrupole doublet and a rectangular scanning magnet has been designed to irradiate food products from the upper side. The bending magnet has an edge angle of 22.5 deg. The length of the beam transfer line has been minimized to keep the whole unit as compact as possible. The beam optics has been optimized keeping in view the requirement of a small beam pipe aperture (25mm radius) and a large range of circular as well as elliptical beam sizes on the food product. The speed of the conveyor belt has been assumed to be very small. The results of the beam optics chosen and the variation of the linear charge density on a food product during the scanning are presented in this paper. The effects of path length variation within the scanning magnet and beam size variation during a scanning are also discussed

  4. On a laser beam fiducial line application for metrological purposes

    International Nuclear Information System (INIS)

    The possibility of a collimated one-mode laser beam used as a fiducial line is considered. The technology of an 'extended' laser beam formation and application for a much extended fiducial line is proposed

  5. Radioactive ion beam line in Lanzhou

    Institute of Scientific and Technical Information of China (English)

    詹文龙; 郭忠言; 刘冠华; 党建荣; 何锐荣; 周嗣信; 尹全民; 罗亦孝; 王义芳; 魏宝文; 孙志宇; 肖国青; 王金川; 江山红; 李加兴; 孟祥伟; 张万生; 秦礼军; 王全进

    1999-01-01

    Radioactive ion beam line in Lanzhou (RIBLL) has been constructed for the production of short-lived radioactive nuclei and studies of exotic nuclei far from the β-stability line. It has been put into operation recently at the National Laboratory of Heavy Ion Accelerator Lanzhou. RIBLL consists of two doubly achromatic parts with a solid acceptance ΔΩ≥6.5 msr, momentum acceptance Δp/p=±5% and maximum magnetic rigidity Bρmax=4.2 Tm. The second part of RIBLL serving as a spectrometer gives an element resolution Z/ΔZ>150 and mass resolution A/ΔA>300. The polarized secondary beams can be obtained by using a swinger dipole magnet to change the incident direction of primary projectile from 0°to 5°. The shortest lift time for secondary beams on RIBLL is less than 1μs. First experiments were performed with neutron rich nuclei for understanding the properties of halo nuclei and exotic nuclear reactions.

  6. Emittance measurements of low-energy beam line at KVI

    NARCIS (Netherlands)

    Toprek, D; Formanoy, [No Value

    2006-01-01

    In this paper is represented the results of beam profile measurements of He-3(+) beam delivered from ECR ion source at KVI. The beam emittance is estimated by varying quadrupole method. The estimated values for the beam emittance at the different profile grid locations along the transport beam line

  7. High resolution beam line for the Grand Raiden spectrometer

    International Nuclear Information System (INIS)

    We have designed and constructed a new beam line which can accomplish both lateral and angular dispersion matching with the Grand Raiden spectrometer. In dispersive mode, lateral and angular dispersions of the beam line are b16=37.1 m and b26=-20.0 rad, respectively, to satisfy matching conditions for Grand Raiden. In achromatic mode, the beam line satisfies the double achromatic condition of b16=b26=0. The magnifications of the beam line are (Mx,My)=(-0.98,0.89) and (-1.00,-0.99) for dispersive and achromatic modes, respectively. In the commissioning experiments, we have succeeded to separate the first excited 2+ state of 168Er with Ex=79.8 keV clearly from the ground state in the (p,p') reaction. We achieved energy resolutions of ΔE=13.0±0.3 and 16.7±0.3 keV in full width at half-maximum for 295 and 392 MeV protons, respectively. These energy resolutions agree with the resolving power of Grand Raiden for an object size of about 1 mm

  8. Design of the SLC damping ring to linac transport lines

    International Nuclear Information System (INIS)

    The first and second order optics for the damping ring to linac transport line are designed to preserve the damped transverse emittance while simultaneously compressing the bunch length of the beam to that length required for reinjection into the linac. This design, including provisions for future control of beam polarization, is described

  9. Beam Line: 100 years of elementary particles

    Science.gov (United States)

    Pais, A.; Weinberg, S.; Quigg, C.; Riordan, M.; Panofsky, W. K. H.

    1997-04-01

    This issue of Beam Line commemorates the 100th anniversary of the April 30, 1897 report of the discovery of the electron by J.J. Thomson and the ensuing discovery of other subatomic particles. In the first three articles, theorists Abraham Pais, Steven Weinberg, and Chris Quigg provide their perspectives on the discoveries of elementary particles as well as the implications and future directions resulting from these discoveries. In the following three articles, Michael Riordan, Wolfgang Panofsky, and Virginia Trimble apply our knowledge about elementary particles to high-energy research, electronics technology, and understanding the origin and evolution of our Universe.

  10. AGS to RHIC transfer line: Design and commissioning

    International Nuclear Information System (INIS)

    In the fall of 1995, we successfully completed a major milestone in the RHIC (Relativistic Heavy Ion Collider) project: the first beam test of the AGS (Alternating Gradient Synchrotron) to RHIC (ATR) transfer line. The ATR serves as a test bed for the new RHIC control system. This transfer line is highly instrumented, with several types of instrumentation for characterizing the extracted beam from AGS and for matching the beam into RHIC. We describe the design and performance of ATR with gold ions with an eye to reaching the design criteria for RHIC operation, both in beam quality and controls

  11. An automatic beam steering system for the NSLS X-17T beam line using closed orbit feedback

    International Nuclear Information System (INIS)

    Initial observations of motion of the undulator radiation in the NSLS X-17T beam line clearly indicated that the beam had to be stabilized in both directions to be usable for the planned soft X-ray imaging experiments. The low frequency spectra of beam motion contained peaks in the range from dc to 60 Hz and at higher frequencies. A beam steering system employing closed orbit feedback has been designed and installed to stabilize the beam in both planes. In each plane of motion, beam position is measured with a beam position detector and a correction signal is fed back to a local four magnet orbit bump to dynamically control the angle of the radiation at the source. This paper describes the design and performance of the beam steering system

  12. Radiation safety aspects of the operation of first three synchrotron beam lines of Indus-2.

    Science.gov (United States)

    Nayak, M K; Nair, Haridas G; Bakshi, A K; Sahani, P K; Singh, Sunil; Khan, Saleem; Verma, Dimple; Dev, Vipin; Sahu, T K; Khare, Mukesh; Kumar, Vijay; Bandyopadhyay, Tapas; Tripathi, R M; Sharma, D N

    2015-04-01

    Five synchrotron radiation beam lines are commissioned and now under regular operation at the Synchrotron Radiation Source, Indus-2 at Raja Ramanna Centre For Advanced Technology (RRCAT), Indore, India. Nine beam lines are under trial operation, and six beam lines are in the installation stage. In the early phase of installation of beam lines on Indus-2, three bending magnet beam lines, Extended X-ray Absorption Fine Structure (EXAFS, BL-8), Energy Dispersive X-ray Diffraction (EDXRD, BL-11) and Angle Dispersive X-ray Diffraction (ADXRD, BL-12), were installed and commissioned, after approval from Atomic Energy Regulatory Board (AERB), India. These beam lines are pink (BL-8), white (BL-11) and monochromatic (BL-12), which are housed in specially designed shielded hutches. In order to ensure safety of users and other working personnel from ionizing radiations present in these beam lines, several safety systems are incorporated and safety procedures are followed. The paper describes the radiological safety aspects of the three beam lines during its initial commissioning trials and also the measurements on radiation levels carried out in and around the beam line hutches. PMID:25209995

  13. RHIC beam loss monitor system design

    International Nuclear Information System (INIS)

    The Beam Loss Monitor (BLM) System is designed to prevent the quenching of RHIC magnets due to beam loss, provide quantitative loss data, and the loss history in the event of a beam abort. The system uses 400 ion chambers of a modified Tevatron design. To satisfy fast (single turn) and slow (100 msec) loss beam criteria and provide sensitivity for studies measurements, a range of over 8 decades is needed. An RC pre-integrator reduces the dynamic range for a low current amplifier. This is digitized for data logging. The output is also applied to an analog multiplier which compensates the energy dependence, extending the range of the abort comparators. High and low pass filters separate the signal to dual comparators with independent programmable trip levels. Up to 64 channels, on 8 VME boards, are controlled by a micro-controller based VME module, decoupling it from the front-end computer (FEC) for real-time operation. Results with the detectors in the RHIC Sextant Test and the electronics in the AGS-to-RHIC (AtR) transfer line will be presented

  14. Beam Line VI REC-steel hybrid wiggler for SSRL

    International Nuclear Information System (INIS)

    A wiggler magnet with 27 periods, each 7 cm long which reaches 1.21 T at a 1.2 cm gap and 1.64 T at 0.8 cm gap has been designed and is in fabrication. Installation in SPEAR is scheduled for mid 1983. This new wiggler will be the radiation source for a new high intensity synchrotron radiation beam line at SSRL. The magnet utilizes rare-earth cobalt (REC) material and steel in a hybrid configuration to achieve simultaneously a high magnetic field with a short period. The magnet is external to a thin walled variable gap stainless steel vacuum chamber which is opened to provide beam aperture of 1.8 cm gap at injection and then closed to a smaller aperture (< 1.0 cm). Five independent drive systems are provided to adjust the magnet and chamber gaps and alignment. Magnetic design, construction details and magnetic measurements are presented

  15. Commissioning Preparation of the AWAKE Proton Beam Line

    CERN Document Server

    Schmidt, Janet; Bracco, Chiara; Goddard, Brennan; Gorbonosov, Roman; Gourber-Pace, Marine; Gschwendtner, Edda; Jensen, Lars; Jones, Owain Rhodri; Kain, Verena; Mazzoni, Stefano; Meddahi, Malika

    2016-01-01

    The AWAKE experiment at CERN will use a proton bunch with an momentum of 400 GeV/c from the SPS to drive large amplitude wakefields in a plasma. This will require a ~830 m long transfer line from the SPS to the experiment. The prepa- rations for the beam commissioning of the AWAKE proton transfer line are presented in this paper. They include the detailed planning of the commissioning steps, controls and beam instrumentation specifications as well as operational tools, which are developed for the steering and monitoring of the beam line. The installation of the transfer line has been finished and first beam is planned in summer 2016.

  16. Theory and design of charged particle beams

    CERN Document Server

    Reiser, Martin

    1994-01-01

    Although particle accelerators are the book's main thrust, it offers a broad synoptic description of beams which applies to a wide range of other devices such as low-energy focusing and transport systems and high-power microwave sources. Develops material from first principles, basic equations and theorems in a systematic way. Assumptions and approximations are clearly indicated. Discusses underlying physics and validity of theoretical relationships, design formulas and scaling laws. Features a significant amount of recent work including image effects and the Boltzmann line charge density prof

  17. SPP Beamline Design and Beam Dynamics

    CERN Document Server

    Turemen, G; Yasatekin, B; Yildiz, V; Celik, M; Alacakir, A; Unel, G; Mete, O

    2014-01-01

    The Radio Frequency Quadrupole of SANAEM Project Prometheus will be a demonstration and educational machine which will accelerate protons from 20 keV to 1.5 MeV. The project is funded by Turkish Atomic Energy Authority and it will be located at Saraykoy Nuclear Research and Training Center in Ankara. The SPP beamline consists of a multi-cusp H+ ion source, a Low Energy Beam Transport line and a four-vane RFQ operating at 352.2 MHz. The design studies for the multi-cusp ion source (RF or DC) were performed with IBSimu and SIMION software packages. The source has already been produced and currently undergoes extensive testing. There is also a preliminary design for the solenoid based LEBT, POISSON and PATH were used in parallel for the preliminary design. Two solenoid magnets are produced following this design. The RFQ design was made using LIDOS.RFQ.Designer and it was crosschecked with a home-grown software package, DEMIRCI. The initial beam dynamics studies have been performed with both LIDOS and TOUTATIS. T...

  18. New Post-Collision Line Design

    CERN Document Server

    Gatignon, Lau

    2014-01-01

    The 1.5 TeV Compact Linear Collider (CLIC) beams, with a total power of 14 MW per beam, are disrupted at the interaction point due to the very strong beam-beam effect. As a result, some 3.5 MW reach each main dump in form of beamstrahlung photons. About 0.5 MW of e+e- pairs with a very broad energy spectrum need to be disposed of along the post-collision line while separating the various beams by charge for beam diagnostics purposes. The Post-collision line has been optimised in order to reduce radiation damage to magnets, the number of magnets required and the stray fields to the incoming beam line.

  19. Preliminary considerations for a surface muon beam line at the SNS

    International Nuclear Information System (INIS)

    A design to transport a beam of low momentum surface muons (29 MeV/c) is presented. The muon beam is obtained from the decay of pions at rest within a transmission target in the 800 MeV extracted proton beam of the Spallation Neutron Source (SNS) being constructed at the Rutherford and Appleton Laboratories. Three different solutions, using beam compression or beam chopping techniques, are presented. A beam line capable of transporting both μ+ and μ- is also briefly outlined. (author)

  20. RESULTS FROM THE COMMISSIONING OF THE NSRL BEAM TRANSFER LINE AT BNL.

    Energy Technology Data Exchange (ETDEWEB)

    TSOUPAS,N.; BELLAVIA,S.; BONATI,R.; ET AL.

    2004-07-05

    The NASA SPACE RADIATION LABORATORY (NSRL) has been constructed and started operations at the Brookhaven National Laboratory in 2003. The NSRL facility will be used by NASA to perform radiation effect studies on materials and biological samples for the space program. The facility utilizes proton and heavy-ion beams of energies from 50 to 3000 MeVln which are accelerated by the AGS Booster synchrotron accelerator. To date, {sup 1}H, {sup 12}C, {sup 56}Fe, {sup 48}Ti, and {sup 197}Au ion beams of various magnetic rigidities have been extracted from the Booster, and transported by the NSRL beam transport line to the sample location which is located 100 m from the extraction point. The NSRL beam transport line has been designed to employ octupole magnetic elements which transform the normal (Gaussian) beam distribution at the location of the sample into a beam with rectangular cross section, and uniformly distributed over the sample. When using the octupole magnetic elements to obtain the uniform beam distribution on the sample, no beam-collimation is applied at any location along the NSRL beam transport line and the beam focusing on the sample is purely magnetic. The main subject of this paper will be the performance of the octupoles (third order optics) in obtaining uniform beam distributions at the target of the NSRL beam transport line.

  1. Neutral beam injection system design for KSTAR tokamak

    Energy Technology Data Exchange (ETDEWEB)

    Choi, B.H.; Lee, K.W.; Chung, K.S.; Oh, B.H.; Cho, Y.S.; Bae, Y.D.; Han, J.M. [Korea Atomic Energy Research Institute, Taejon (Korea)

    1998-06-01

    The NBI system for KSTAR (Korean Superconducting Tokamak Advanced Research) has been designed based on conventional positive ion beam technology. One beam line consists of three ion sources, three neutralizers, one bending magnet, and one drift tube. This system will deliver 8 MW deuterium beam to KSTAR plasma in normal operation to support the advanced experiments on heating, current drive and profile control. The key technical issues in this design were high power ion source(120 kV, 65 A), long pulse operation (300 seconds; world record is 30 sec), and beam rotation from vertical to horizontal direction. The suggested important R and D points on ion source and beam line components are also included. (author). 7 refs., 27 figs., 1 tab.

  2. Beam diagnostics and data acquisition system for ion beam transport line used in applied research

    International Nuclear Information System (INIS)

    Ion beam transport line for applied research on U-400 cyclotron, beam diagnostics and data acquisition system for condensed matter studies are described. The main features of Windows-based real time program are considered

  3. Radiation shielding of the beam absorber in the MI 8-GeV beam line

    Energy Technology Data Exchange (ETDEWEB)

    Rakhno, I.; /Fermilab

    2006-01-01

    Results of Monte Carlo radiation shielding calculations performed for the beam absorber of the MI 8 GeV beam line are presented and discussed. The possibility to reach the level of 10{sup 19} protons per year is investigated.

  4. High-resolution mass separator and 60 m beam transport line for the radioactive nuclear beam facility at INS

    International Nuclear Information System (INIS)

    A high resolution on-line isotope separator (ISOL) followed by a long beam transport line is under testing at INS, as a pilot radioactive beam facility for the E-arena of the Japanese Hadron Project. The ISOL has a unique feature in its high voltage potential configuration; it has two separation stages and both are electrically insulated from the ground. This feature is effective to eliminate impurities as well as to perform high resolution mass separation while keeping the injection beam velocity to the post accelerator constant. The design concept and present status of performance tests are reported. (author)

  5. Enhancing the accelerated beam current in the booster synchrotron by optimizing the transport line beam propagation

    Indian Academy of Sciences (India)

    Saini R S; Tyagi Y; Ghodke A D; Puntambekar T A

    2016-04-01

    In this paper, we present the results of transverse beam emittance and twiss parameter measurement of an electron beam, delivered by a 20 MeV microtron which is used as a pre-injector system for a booster synchrotron in the Indus Accelerator Facility at RRCAT Indore. Based on these measured beam parameters, beam optics of a transport line was optimized and its results are alsodiscussed in this paper. This beam transport line is used to transport the electron beam from the 20MeV microtron to the booster synchrotron. The booster synchrotron works as a main injector for Indus-1 and Indus-2 synchrotron radiation facilities. To optimize the beam optics of a transport linefor proper beam transmission through the line as well as to match the beam twiss parameters at the beam injection point of another accelerator, it is necessary to know the transverse beam emittance and twiss parameters of the beam coming from the first one. A MATLAB-based GUI program has been developed to calculate the beam emittance and twiss parameters, using quadrupole scanmethod. The measured parameters have been used for beam transport line optimization and twiss parameters matching at booster injection point. After this optimization, an enhancement of ∼50% beam current has been observed in the booster synchrotron.

  6. Conceptual design of proton beam window

    International Nuclear Information System (INIS)

    In a MW-scale neutron scattering facility coupled with a high-intensity proton accelerator, a proton beam window is installed as the boundary between a high vacuum region of the proton beam transport line and a helium environment around the target assembly working as a neutron source. The window is cooled by water so as to remove high volumetric heat generated by the proton beam. A concept of the flat-type proton beam window consisting of two plates of 3 mm thick was proposed, which was found to be feasible under the proton beam power of 5 MW through thermal-hydraulic and structural strength analyses. (authors)

  7. Use achromatic beam line for Hall C beam energy measurement

    International Nuclear Information System (INIS)

    There are several different methods to measure accelerator beam energy, for example, from frequency spectrum measurement and calculation of orbit length from accurate measurement of magnetic field in a reference dipole magnet from high precision floating wire analogue, and from detecting the synchrotron radiation emitted from kicker magnets. In this report an achromatic spectrometer method combined with calibrating a reference magnet and determining the deflection angle of spectrometer is proposed. The similar method will be used to measure beam energy in Bates Linear Accelerator Center, a 10-3 accuracy of beam energy measurement is expected

  8. The Booster Application Facility (BAF) Beam Transport Line of BNL-AGS Booster

    International Nuclear Information System (INIS)

    An experimental facility, to irradiate materials with energetic ion beams, has been proposed to be built at the Brookhaven National Laboratory. The BAF facility will mainly consist of the AGS-Booster slow extraction, of a beam transport line, and a target room. The beam transport line will transport the slow extracted beam of the AGS-Booster to the target location for the irradiation of various materials and specimens. A variety of ion beams like (p, 28Si, 56Fe, 63Cu, 197Au) in the energy range of 0.04 to 3.07 GeV/nucleon will be transported by the BAF line which is designed to provide variable beam spot sizes on the BAF target with sizes varying from 2.0 cm to 20.0 cm in diameter. The beam spot sizes will include 95% of the beam intensity with the beam distributed normally (Gaussian) on the target area. It is also possible by introducing magnetic octupoles at specified locations along the beam transport line, to modify the distribution on the BAF target and provide well confined beams with rectangular cross section and with uniform distribution on the target

  9. PAL-XFEL cavity beam position monitor pick-up design and beam test

    Science.gov (United States)

    Lee, Sojeong; Park, Young Jung; Kim, Changbum; Kim, Seung Hwan; Shin, Dong Cheol; Han, Jang-Hui; Ko, In Soo

    2016-08-01

    As an X-ray Free Electron Laser, PAL-XFEL is about to start beam commissioning. X-band cavity beam position monitor (BPM) is used in the PAL-XFEL undulator beam line. Prototypes of cavity BPM pick-up were designed and fabricated to test the RF characteristics. Also, the beam test of a cavity BPM pick-up was done in the Injector Test Facility (ITF). In the beam test, the raw signal properties of the cavity BPM pick-up were measured at a 200 pC bunch charge. According to the RF test and beam test results, the prototype cavity BPM pick-up design was confirmed to meet the requirements of the PAL-XFEL cavity BPM system.

  10. Vacuum ultraviolet beam lines at Laboratorio Nacional de Luz Sincrotron, the Brazilian synchrotron source

    International Nuclear Information System (INIS)

    A TGM beamline for the spectral range 12--310 eV is being built at Laboratorio Nacional de Luz Sincrotron (LNLS). This beam line consists of safety devices, a condensing mirror, a toroidal grating monochromator, and a refocusing mirror. This beam line has been assembled up to the exit slits. A spherical grating monochromator beam line has been designed for the spectral range 200--1000 eV. The performance is limited by the surface slope error in the gratings. If the rms figure error is 2 μrad, the expected resolving power is better than 3000

  11. REQUIREMENTS AND GUIDELINES FOR NSLS EXPERIMENTAL BEAM LINE VACUUM SYSTEMS-REVISION B

    International Nuclear Information System (INIS)

    Typical beam lines are comprised of an assembly of vacuum valves and shutters referred to as a ''front end'', optical elements to monochromatize, focus and split the photon beam, and an experimental area where a target sample is placed into the photon beam and data from the interaction is detected and recorded. Windows are used to separate sections of beam lines that are not compatible with storage ring ultra high vacuum. Some experimental beam lines share a common vacuum with storage rings. Sections of beam lines are only allowed to vent up to atmospheric pressure using pure nitrogen gas after a vacuum barrier is established to protect ring vacuum. The front end may only be bled up when there is no current in the machine. This is especially true on the VUV storage ring where for most experiments, windows are not used. For the shorter wavelength, more energetic photons of the x-ray ring, beryllium windows are used at various beam line locations so that the monochromator, mirror box or sample chamber may be used in a helium atmosphere or rough vacuum. The window separates ring vacuum from the environment of the downstream beam line components. The stored beam lifetime in the storage rings and the maintenance of desirable reflection properties of optical surfaces depend upon hydrocarbon-free, ultra-high vacuum systems. Storage ring vacuum systems will operate at pressures of ∼ 1 x 10-10 Torr without beam and ∼ 1 x 10-9 Torr with beam. Systems are free of hydrocarbons in the sense that no pumps, valves, etc. containing organics are used. Components are all-metal, chemically cleaned and bakeable. To the extent that beam lines share a common vacuum with the storage ring, the same criteria will hold for beam line components. The design philosophy for NSLS beam lines is to use all-metal, hydrocarbon-free front end components and recommend that experimenters use this approach for common vacuum hardware downstream of front ends. O-ring-sealed valves, if used, are not

  12. REQUIREMENTS AND GUIDELINES FOR NSLS EXPERIMENTAL BEAM LINE VACUUM SYSTEMS-REVISION B.

    Energy Technology Data Exchange (ETDEWEB)

    FOERSTER,C.

    1999-05-01

    Typical beam lines are comprised of an assembly of vacuum valves and shutters referred to as a ''front end'', optical elements to monochromatize, focus and split the photon beam, and an experimental area where a target sample is placed into the photon beam and data from the interaction is detected and recorded. Windows are used to separate sections of beam lines that are not compatible with storage ring ultra high vacuum. Some experimental beam lines share a common vacuum with storage rings. Sections of beam lines are only allowed to vent up to atmospheric pressure using pure nitrogen gas after a vacuum barrier is established to protect ring vacuum. The front end may only be bled up when there is no current in the machine. This is especially true on the VUV storage ring where for most experiments, windows are not used. For the shorter wavelength, more energetic photons of the x-ray ring, beryllium windows are used at various beam line locations so that the monochromator, mirror box or sample chamber may be used in a helium atmosphere or rough vacuum. The window separates ring vacuum from the environment of the downstream beam line components. The stored beam lifetime in the storage rings and the maintenance of desirable reflection properties of optical surfaces depend upon hydrocarbon-free, ultra-high vacuum systems. Storage ring vacuum systems will operate at pressures of {approximately} 1 x 10{sup {minus}10} Torr without beam and {approximately} 1 x 10{sup {minus}9} Torr with beam. Systems are free of hydrocarbons in the sense that no pumps, valves, etc. containing organics are used. Components are all-metal, chemically cleaned and bakeable. To the extent that beam lines share a common vacuum with the storage ring, the same criteria will hold for beam line components. The design philosophy for NSLS beam lines is to use all-metal, hydrocarbon-free front end components and recommend that experimenters use this approach for common vacuum hardware

  13. Characterization of a tagged $\\gamma$-ray beam line at the DAFNE Beam Test Facility

    CERN Document Server

    Cattaneo, P W; Boffelli, F; Bulgarelli, A; Buonomo, B; Chen, A W; D’Ammando, F; FoggettA, L; Froysland, T; Fuschino, F; Galli, M; Gianotti, F; Giuliani, A; Longo, F; Marisaldi, M; Mazzitelli, G; Pellizzoni, A; Prest, M; Pucella, G; Quintieri, L; Rappoldi, A; Tavani, M; Trifoglio, M; Trois, A; Valente, P; Vallazza, E; Vercellone, S; Zambra, A; Barbiellini, G; Caraveo, P; Cocco, V; Costa, E; De Paris, G; Del Monte, E; Di Cocco, G; Donnarumma, I; Evangelista, Y; Feroci, M; Ferrari, A; Fiorini, M; Labanti, C; Lapshov, I; Lazzarotto, F; Lipari, P; Mastropietro, M; Mereghetti, S; Morelli, E; Moretti, E; Morselli, A; Pacciani, L; Perotti, F; Piano, G; Picozza, P; Pilia, M; Porrovecchio, G; Rapisarda, M; Rubini, A; Sabatini, S; Soffitta, P; Striani, E; Vittorini, V; Zanello, D; Colafrancesco, S; Giommi, P; Pittori, C; Santolamazza, P; Verrecchia, F; Salotti, L

    2012-01-01

    At the core of the AGILE scientific instrument, designed to operate on a satellite, there is the Gamma Ray Imaging Detector (GRID) consisting of a Silicon Tracker (ST), a Cesium Iodide Mini-Calorimeter and an Anti-Coincidence system of plastic scintillator bars. The ST needs an on-ground calibration with a γ-ray beam to validate the simulation used to calculate the energy response function and the effective area versus the energy and the direction of the γ rays. A tagged γ-ray beam line was designed at the Beam Test Facility (BTF) of the INFN Laboratori Nazionali of Frascati (LNF), based on an electron beam generating γ-rays through bremsstrahlung in a position-sensitive target. The γ-ray energy is deduced by difference with the post-bremsstrahlung electron energy [1] and [2]. The electron energy is measured by a spectrometer consisting of a dipole magnet and an array of position sensitive silicon strip detectors, the Photon Tagging System (PTS). The use of the combined BTF-PTS system as tagged photon be...

  14. Development of the CRIS (Collinear Resonant Ionisation Spectroscopy) beam line

    International Nuclear Information System (INIS)

    The CRIS (Collinear Resonant Ionisation Spectroscopy) beam line is a new experimental set up at the ISOLDE facility at CERN. CRIS is being constructed for high-resolution laser spectroscopy measurements on radioactive isotopes. These measurements can be used to extract nuclear properties of isotopes far from stability. The CRIS beam line has been under construction since 2009 and testing of its constituent parts have been performed using stable and radioactive ion beams, in preparation for its first on-line run. This paper will present the current status of the CRIS experiment and highlight results from the recent tests.

  15. The effects of magnetic fringe fields on beam dynamics in a beam transport line of a terahertz FEL source

    Energy Technology Data Exchange (ETDEWEB)

    Zeng, Han [State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei (China); Xiong, Yongqian, E-mail: yqxiong@mail.hust.edu.cn [State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei (China); Pei, Yuanji [National Synchrotron Radiation laboratory, University of Science and Technology of China, Hefei 230029, Anhui (China)

    2014-11-11

    The transport line used in a terahertz FEL device has to transport electron beam through the entire system efficiently and meet the requirements of the beam parameters at the undulator entrance. Due to space limitations, the size of the magnets (five quadrupoles and two bending magnets) employed in the transport line was limited, and some devices were densely packed. In this paper, analyses of the effect of fringe fields and magnetic interference of magnets are presented. 3D models of these magnets are built and their linear optical properties are compared with those obtained by hard edge models. The results indicated that the effects of these factors are significant and they would cause a mismatch of the beam at the exit of the transport line under the preliminary lattice design. To solve this problem, the beam was re-matched using the particle swarm optimization algorithm.

  16. Optimal Design of Laminated Composite Beams

    DEFF Research Database (Denmark)

    Blasques, José Pedro Albergaria Amaral

    This thesis presents an optimal design framework for the structural design of laminated composite beams. The possibility of improving the static and dynamic performance of laminated composite beam through the use of optimal design techniques motivates the investigation presented here. A structural...... model for the analysis of laminated composite beams is proposed. The structural analysis is performed in a beam finite element context. The development of a finite element based tool for the analysis of the cross section stiffness properties is described. The resulting beam finite element formulation is...... able to account for the effects of material anisotropy and inhomogeneity in the global response of the beam. Beam finite element models allow for a significant reduction in problem size and are therefore an efficient alternative in computationally intensive applications like optimization frameworks...

  17. Development of the collinear laser beam line at TRIUMF

    International Nuclear Information System (INIS)

    The low-energy collinear laser beam line at ISAC routinely produces highly nuclear-spin polarized beams of 8Li+ for depth-controlled studies of thin films and near-surface phenomena. It also is used for nuclear structure and fundamental symmetry studies requiring other beams of polarized lithium and sodium isotopes. Further development of polarized 20F and 11Be beams is described, the latter in some detail. Laser fluorescence spectroscopy at high sensitivity using unpolarized bunched beams is briefly mentioned.

  18. High intensity proton beam transportation through fringe field of 70 MeV compact cyclotron to beam line targets

    Science.gov (United States)

    Zhang, Xu; Li, Ming; Wei, Sumin; Xing, Jiansheng; Hu, Yueming; Johnson, Richard R.; Piazza, Leandro; Ryjkov, Vladimir

    2016-06-01

    From the stripping points, the high intensity proton beam of a compact cyclotron travels through the fringe field area of the machine to the combination magnet. Starting from there the beams with various energy is transferred to the switching magnet for distribution to the beam line targets. In the design of the extraction and transport system for the compact proton cyclotron facilities, such as the 70 MeV in France and the 100 MeV in China, the space charge effect as the beam crosses the fringe field has not been previously considered; neither has the impact on transverse beam envelope coupled from the longitudinal direction. Those have been concerned much more with the higher beam-power because of the beam loss problem. In this paper, based on the mapping data of 70 MeV cyclotron including the fringe field by BEST Cyclotron Inc (BEST) and combination magnet field by China Institute of Atomic Energy (CIAE), the beam extraction and transport are investigated for the 70 MeV cyclotron used on the SPES project at Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro (INFN-LNL). The study includes the space charge effect and longitudinal and transverse coupling mentioned above, as well as the matching of beam optics using the beam line for medical isotope production as an example. In addition, the designs of the ±45° switching magnets and the 60° bending magnet for the extracted beam with the energy from 35 MeV to 70 MeV have been made. Parts of the construction and field measurements of those magnets have been done as well. The current result shows that, the design considers the complexity of the compact cyclotron extraction area and fits the requirements of the extraction and transport for high intensity proton beam, especially at mA intensity levels.

  19. Development of multi-functional beam diagnostic device for transfer line TL-1 of Indus

    International Nuclear Information System (INIS)

    A beam slit monitor was developed and installed in transfer line TL-1 of synchrotron radiation source Indus-1. Beam slit monitor is a multifunction beam diagnostic device that can be used as a slit with adjustable aperture to define the beam size and also to determine the horizontal and vertical beam profile by measuring the current captured by the blade as it scans the beam in transverse direction. The device can also be used as a conventional fluorescent screen for visually observing the beam profile by intercepting the beam on one of its blades. As an adjustable 'Hole' monitor, it allows a portion of the beam to pass through, while one can monitor the beam edges falling on the blades. The device has four independent blades, two blades moving in opposing horizontal direction and the remaining two moving in vertical direction. This arrangement allows for positioning of the hole (and slit) in a field of 60 mm x 40 mm around the theoretical beam centre line. Its overall accuracy is better than 0.1 mm. The device operates under a vacuum of 10-7 mbar. A remote control for the device was developed. A VME based system with serial interface to PC was realized to control and position the blades. The complete design, manufacturing, integration, testing and qualification of beam slit monitor were done in RRCAT. This paper also presents the beam parameters information obtained using this device. (author)

  20. Physics Design Considerations of Diagnostic X Beam Transport System

    CERN Document Server

    Chen, Y J; Chen, Yu-Jiuan; Paul, Arthur C.

    2000-01-01

    Diagnostic X (D-X) transport system would extract the beam from the downstream transport line of the second- axis of the Dual Axis Radiographic Hydrodynamic Test facility (DARHT-II) and transport this beam to the D-X firing point via four branches of the beamline in order to provide four lines of sight for x-ray radiography. The design goal is to generate four DARHT-II-like x-ray pulses on each line of sight. In this paper, we discuss several potential beam quality degradation processes in the passive magnet lattice beamline and indicate how they constrain the D-X beamline design parameters, such as the background pressure, the pipe size, and the pipe material

  1. The SPS beam lines to the West Hall

    CERN Multimedia

    1976-01-01

    The proton beam arriving from bottom is cut into three parts by the special steel septum magnets, seen in the centre, and then focussed onto the targets just out the sight on the top. The beam line near the right hand wall carries an RF-separated beam to BEBC from a target located deep in the TT60 tunnel. (Annual Report 1976 p. 116)

  2. Cryogenic supplies for the TFTR neutral beam line cryopanels

    International Nuclear Information System (INIS)

    Cryocondensing panels will be used for the Neutral Beam Lines of the TFTR to satisfy a pumping speed requirement of 2.5 x 106 l/s. The cryocondensing panels are fed by liquid helium (LHe), boiling at selectable temperatures of 4.50K or 3.80K. Liquid nitrogen (LN2) panels and chevrons thermally shield the LHe panel. The closed-loop LHe supply system and the open loop LN2 system are discussed. The helium refrigerator of minimum 1070-W capacity, together with its distribution system, and the nitrogen distribution system in the ton/hour LN2 range is presented. Problems and their solutions in connection with the LHe system, including the distribution over a distance of 500 feet of large quantities of liquid/gas mixtures with load variations over the range of about 3 : 1, and the economies of various types of distribution lines (passive, pumped, shielded, combined), are described. The system design passed the preliminary phase. Design features and auxiliary equipment to assure dispersion of large quantities of nitrogen into the atmosphere and to permit operation under degraded cryogenic helium refrigerator performance are also discussed in Design Considerations

  3. Beam director design report: Volume 1

    International Nuclear Information System (INIS)

    A design and fabrication effort for a beam director is documented. The conceptual design provides for the beam to pass first through a bending and focusing system (or ''achromat''), through a second achromat, through an air-to-vacuum interface (the ''beam window''), and finally through the vernier steering system. Following an initial concept study for a beam director, a prototype permanent magnet 300 beam-bending achromat and a prototype vernier steering magnet were designed and built. In volume I, the design requirements are stated, the design is summarized and illustrated, and detailed analysis and computations are provided. Also, a summary of materials used, a description of the manufacturing process, and a summary of project funding are provided

  4. A computer code for computing the beam profiles in the NBI beam line 'BEMPROF'

    International Nuclear Information System (INIS)

    A computer code was developed which can compute the beam profiles and the percentage heat loadings on the various components in the NBI beam line such as the beam target, the beam limiters and the calorimeter. The geometrical injection efficiency of NBI and the heat input pattern on the counter surface of the injection port of the torus can also be computed. The major feature of this code is that the effects of the beamlet intensity distribution, the beamlet deflection, the beam screening by the upstream limiters and also the plasma density distribution and the divergence angle distribution over the beam extraction area can be taken into account. (author)

  5. Non-polarizing beam splitter design

    Science.gov (United States)

    Qi, H. J.; Shao, J. D.; Hong, R. J.; Yi, K.; Fan, Z. X.

    2004-09-01

    In this paper a non-polarizing beam splitter design concept is presented using anisotropic thin films. Transmittance of s- and p-polarized waves can be dealt with separately. This concept can be applied to non-polarizing beam splitter designs of single wavelength and broad-band spectrum at oblique incidence. A few examples of non-polarizing beam splitters (50:50) at the design wavelength of 1064 nm and over the visible spectrum (420 nm 680 nm) are elaborated. Besides, the angular performance of these designs is examined.

  6. Steering A Radar Beam Toward The Zero-Doppler Line

    Science.gov (United States)

    Chang, Chi-Yung; Curlander, John C.

    1994-01-01

    Algorithm computes angles needed to aim radar beam from airborne or spaceborne platform toward Doppler line projected on ground for which Doppler shift of radar return is zero. Devised to reduce Doppler errors and simplify processing of data from synthetic-aperture-radar system. Applicable to aiming of other radio or optical instruments toward their zero-Doppler lines on ground.

  7. BECOLA Beam Line Construction and Laser System

    Science.gov (United States)

    Pedicini, Eowyn; Minamisono, Kei; Barquest, Brad; Bollen, Georg; Klose, Andrew; Mantica, Paul; Morrissey, Dave; Ringle, Ryan; Schwarz, Stefan; Vinnikova, Sophia

    2010-11-01

    The BECOLA (BEam COoler and LAser spectroscopy) facility is being installed at NSCL for experiments on radioactive nuclides.ootnotetextK. Minamisono et al, Proc. Inst. Nucl. Theory 16, 180 (2009). Low energy ion beams will be cooled/bunched in an RFQ ion trap and then extracted to a max of 60 kV. The ion beam will be neutralized through a charge exchange cell (CEC), and remaining ions will be removed by a deflector and collected in a Faraday cup. Collinear laser spectroscopy will be used to measure the atomic hyperfine structure, and nuclear properties will be extracted. The assembly, vacuum testing, and optical alignment of the CEC have been completed and the ion deflector and Faraday cup were also assembled. Stabilization of the Ti:sapphire laser to be used for spectroscopy is achieved through a feedback loop using a precision wavelength meter that is calibrated by a stabilized He-Ne laser. Coupling the He-Ne laser into a single-mode optical fiber was optimized for stable operation of the feedback loop. Finally, a wall chart of nuclear moments was prepared to view trends in μ and Q for nuclear ground states for planning future measurements.

  8. Beam-line considerations for experiments with highly-charged ions

    International Nuclear Information System (INIS)

    The APS offers exciting possibilities for a bright future in x-ray research. For example, measurements on the inner-shell photoionization of ions will be feasible using stored ions in ion traps or ion beams from an electron-cyclotron-resonance ion source, or perhaps even a heavy-ion storage ring. Such experiments with ionic targets are the focus for the APS. The performance of beam lines X26C, X26A, and X17 on the x-ray ring of the National Synchrotron Light Source will be discussed as specific examples of beam-line design considerations

  9. Pulse-by-pulse multi-beam-line operation for x-ray free-electron lasers

    Science.gov (United States)

    Hara, Toru; Fukami, Kenji; Inagaki, Takahiro; Kawaguchi, Hideaki; Kinjo, Ryota; Kondo, Chikara; Otake, Yuji; Tajiri, Yasuyuki; Takebe, Hideki; Togawa, Kazuaki; Yoshino, Tatsuya; Tanaka, Hitoshi; Ishikawa, Tetsuya

    2016-02-01

    The parallel operation of plural undulator beam lines is an important means of improving the efficiency and usability of x-ray free-electron laser facilities. After the installation of a second undulator beam line (BL2) at SPring-8 Angstrom compact free-electron laser (SACLA), pulse-by-pulse switching between two beam lines was tested using kicker and dc twin-septum magnets. To maintain a compact size, all undulator beam lines at SACLA are designed to be placed within the same undulator hall located downstream of the accelerator. In order to ensure broad tunability of the laser wavelength, the electron bunches are accelerated to different beam energies optimized for the wavelengths of each beam line. In the demonstration, the 30 Hz electron beam was alternately deflected to two beam lines and simultaneous lasing was achieved with 15 Hz at each beam line. Since the electron beam was deflected twice by 3° in a dogleg to BL2, the coherent synchrotron radiation (CSR) effects became non-negligible. Currently in a wavelength range of 4-10 keV, a laser pulse energy of 100 - 150 μ J can be obtained with a reduced peak current of around 1 kA by alleviating the CSR effects. This paper reports the results and operational issues related to the multi-beam-line operation of SACLA.

  10. R&D of the Fluoroscopes of 100 MeV Cyclotron Beam Lines

    Institute of Scientific and Technical Information of China (English)

    YIN; Meng; GUAN; Feng-ping; XIE; Huai-dong; ZHENG; Xia; XING; Jian-sheng; LV; Yin-long

    2013-01-01

    Beijing Radioactive Ion-beam Facility(BRIF)consists of a 100 MeV H-cyclotron CYCIAE-100and nine beam lines.All the beam lines provide the channels of the proton beam or the neutron beam to the terminal of physics experiment.There are many beam diagnosis monitors distributing along the beam lines,including,Faraday cups,beam position monitors,fluoroscopes,collimators,emittance measurement

  11. Overview of the Beam diagnostics in the Medaustron Accelerator:Design choices and test Beam commissioning

    CERN Document Server

    Osmic, F; Gyorgy, A; Kerschbaum, A; Repovz, M; Schwarz, S; Neustadt, W; Burtin, G

    2012-01-01

    The MedAustron centre is a synchrotron based accelerator complex for cancer treatment and clinical and non-clinical research with protons and light ions, currently under construction in Wiener Neustadt, Austria. The accelerator complex is based on the CERN-PIMMS study [1] and its technical implementation by the Italian CNAO foundation in Pavia [2]. The MedAustron beam diagnostics system is based on sixteen different monitor types (153 devices in total) and will allow measuring all relevant beam parameters from the source to the irradiation rooms. The monitors will have to cope with large intensities and energy ranges. Currently, one ion source, the low energy beam transfer line and the RFQ are being commissioned in the Injector Test Stand (ITS) at CERN. This paper gives an overview of all beam monitors foreseen for the MedAustron accelerator, elaborates some of the design choices and reports the first beam commissioning results from the ITS.

  12. DOE/DMS workshop on future synchrotron VUV and x-ray beam Lines

    International Nuclear Information System (INIS)

    This document contains an overview of the participating DOE Laboratory beam line interests and the projected science to be addressed on these beam lines, both at new and existing synchrotron facilities. The scientific programs associated with present and planned synchrotron research by DOE Laboratories are discussed in chapters titled ''VUV and Soft X-Ray Research'' and ''Hard X-Ray Research.'' This research encompasses a broad range of the nation's scientific and technical research needs from fundamental to applied, in areas including environmental, biological, and physical sciences; new materials; and energy-related technologies. The projected cost of this proposed construction has been provided in tabular form using a uniform format so that anticipated DOE and outside funding agency contributions for construction and for research and development can be determined. The cost figures are, of course, subject to uncertainties of detailed design requirements and the availability of facility-designed generic components and outside vendors. The report also contains a compendium (as submitted by the beam line proposers) of the design capabilities, the anticipated costs, and the scientific programs of projected beam line construction at the four synchrotron facilities. A summary of the projected cost of these beam lines to be requested of DOE is compiled

  13. On-line laser spectroscopy with thermal atomic beams

    CERN Document Server

    Thibault, C; De Saint-Simon, M; Duong, H T; Guimbal, P; Huber, G; Jacquinot, P; Juncar, P; Klapisch, Robert; Liberman, S; Pesnelle, A; Pillet, P; Pinard, J; Serre, J M; Touchard, F; Vialle, J L

    1981-01-01

    On-line high resolution laser spectroscopy experiments have been performed in which the light from a CW tunable dye laser interacts at right angles with a thermal atomic beam. /sup 76-98/Rb, /sup 118-145 /Cs and /sup 208-213/Fr have been studied using the ionic beam delivered by the ISOLDE on-line mass separator at CERN while /sup 30-31/Na and /sup 38-47/K have been studied by setting the apparatus directly on-line with the PS 20 GeV proton beam. The principle of the method is briefly explained and some results concerning nuclear structure are given. The hyperfine structure, spins and isotope shifts of the alkali isotopes and isomers are measured. (8 refs).

  14. Beam Dump Window Design for CSNS

    OpenAIRE

    Nie, Xiao-Jun; Liu, Lei; Wang, Hai-Jing

    2014-01-01

    Beam dump window is one of the most important parts of beam dump of China Spallation Neutron Source(CSNS). The material, structure and other concerned issue have been discussed in this paper. Thermal analyses have been applied for the beam dump window design. By comparison, GlidcopAL-15 and 316L have been chosen as window material. The window section has been designed as inner convex spherical surface and the window thickness has been set 1.5mm to 3mm by structure optimization. The window saf...

  15. The ITER neutral beam test facility : Design overview

    International Nuclear Information System (INIS)

    In the frame an EFDA contract, the CEA, in close collaboration with the Consorzio RFX, Padua, FZK, Karlsruhe and IPP Garching, is carrying out a design study of the ITER Neutral Beam Test Facility (NBTF) with the aim to procure in time, a dedicated test bed to optimise the performances of the first ITER neutral beam injector and to demonstrate its reliability. The main specifications that have to be considered for the study of the NBTF genetic design and general infrastructure are first an easy maintenance of components, an easy man access and also integration of the required full set of beam diagnostics. A specific inspection tool is developed that allows remote visual inspection of the source ground grid and beam line components to be performed under vacuum. Associated safety requirements are also considered (pulses in H2 and D2, X-ray and neutron production). The current design of the dedicated beam line vessel allows mixed vertical and horizontal access to the beam line components during phase 1 of the operation plan (20s short pulses). The split two halves cylindrical cryopumps, developed by FZK, will be further re-assembled in the final ITER reference cylindrical configuration for phase 2 of the operation plan: long pulses at full power. The 4.5 K cryopanels must be periodically regenerated at 90 K. Both regeneration and cool-down phases of the cryopanels are time consuming optimised. The cryosystem that supply the necessary cryogens to the cryopump is designed using existing industrial 4.5 K cold power and 80 K helium gas refrigenerators. A total power of about 50 MW will have to be removed during the two NBTF operation stages of short (20 s) and long (∼ 1 hour) pulses. for both scenarios, the cooling plant is designed for cooling down the high and low voltage components, the cryoplant and associated power supply systems. (author)

  16. Changes to the Transfer Line Collimation System for the High-Luminosity LHC Beams

    CERN Document Server

    Kain, V; Bracco, C; Fraser, M; Galleazzi, F; Gianfelice-Wendt, E; Kosmicki, A; Maciariello, F; Meddahi, M; Nuiry, F X; Steele, G; Velotti, F

    2015-01-01

    The current LHC transfer line collimation system will not be able to provide enough protection for the high brightness beams in the high-luminosity LHC era. The new collimation system will have to attenuate more and be more robust than its predecessor. The active jaw length of the new transfer line collimators will therefore be 2.1 m instead of currently 1.2 m. The transfer line optics will have to be adjusted for the new collimator locations and larger beta functions at the collimators for absorber robustness reasons. In this paper the new design of the transfer line collimation system will be presented with its implications on transfer line optics and powering, maintainability, protection of transfer line magnets in case of beam loss on a collimator and protection of the LHC aperture.

  17. Changes to the Transfer Line Collimation System for the High-Luminosity LHC Beams

    Energy Technology Data Exchange (ETDEWEB)

    Kain, V. [CERN; Aberle, O. [CERN; Bracco, C. [CERN; Fraser, M. [CERN; Galleazzi, F. [CERN; Gianfelice-Wendt, E. [Fermilab; Kosmicki, A. [CERN; Maciariello, F. [CERN; Meddahi, M. [CERN; Nuiry, F. X. [CERN; Steele, G. [CERN; Velotti, F. [CERN

    2015-06-01

    The current LHC transfer line collimation system will not be able to provide enough protection for the high brightness beams in the high-luminosity LHC era. The new collimation system will have to attenuate more and be more robust than its predecessor. The active jaw length of the new transfer line collimators will therefore be 2.1 m instead of currently 1.2 m. The transfer line optics will have to be adjusted for the new collimator locations and larger beta functions at the collimators for absorber robustness reasons. In this paper the new design of the transfer line collimation system will be presented with its implications on transfer line optics and powering, maintainability, protection of transfer line magnets in case of beam loss on a collimator and protection of the LHC aperture.

  18. Petrol Pipe Line Telemonitoring Design

    OpenAIRE

    Abdelrasoul Jabar Alzubaidi

    2015-01-01

    Petrol pipe lines are subjected to different types of malfunction. The malfunction can happen due to technical faults or it may be due to a gangsters attack on the petrol pipes in order to hinder the petrol pumping operations.. The damage of the petrol pipes causes a loss of a large amount of petrol from the pipe lines. Petrol pipe damage also causes fires and pollution to the environments . Such operations causes a lot of loss in economy to the country concerned where the sabotag...

  19. Femtosecond laser processing with a holographic line-shaped beam.

    Science.gov (United States)

    Hasegawa, Satoshi; Shiono, Koji; Hayasaki, Yoshio

    2015-09-01

    Line-shaped femtosecond pulses are well-suited to large-area machining with high throughput in laser cutting, peeling, and grooving of materials. First, we demonstrated the single-shot fabrication of a line structure in a glass surface using a line-shaped pulse generated by a holographic cylindrical lens displayed on a liquid-crystal spatial light modulator. We found the line structure was uniform and smooth near the ends because of the ability to precisely control the intensity distribution and to achieve single-shot fabrication. Second, we demonstrated a line-shaped beam deformed three-dimensionally for showing the potential of holographic line-shaped beam processing. Third, we demonstrated laser peeling of an indium tin oxide film. We found that little debris around the fabricated area was observed, because the debris was removed by the beam itself. Last, we demonstrated laser grooving of stainless steel. We found the swelling of the surface included upwardly growing nanogratings, although many line-shaped pulse irradiations were given. The swelling was caused by the depositions of the debris on the top of the nanogratings. PMID:26368421

  20. Design of proton beam optics to realize beam distribution transformation in C-ADS HTBT

    International Nuclear Information System (INIS)

    The linac to the transmuter beam transport line (LTBT) connecting the end of the linac to the spallation target is a critical sub-system in the accelerator driven system (ADS). It has the function of transporting the accelerated high power proton beam to the target with a beam footprint satisfying the special requirements of the minor actinide (MA) transmuter. In this paper, a preliminary conceptual design of the hurling magnet to transmuter beam transport section (HTBT), as a part of the LTBT, for the China ADS (C-ADS) system is proposed and developed. In this design, a novel hurling magnet with a two dimensional amplitude modulation (AM) of 1 kHz and scanning of more than 10 kHz at 360° in transverse directions is used to realize a 300 mm diameter uniform distribution of beam on target. The preliminary beam optics design of C-ADS HTBT optimized to minimize the beam loss on the vacuum chamber and the radiation damage caused by back-scattering neutrons will be reported. (authors)

  1. Power supplies for IRFEL beam transport line magnets

    International Nuclear Information System (INIS)

    The Infrared Free Electron Laser (IRFEL) is being developed at RRCAT. Current regulated, dc power supplies are required for various electromagnets in its beam transport line. These are rated for 13 A and 15 V (maximum) with output current stability of ±100 ppm. In all, 60 power supplies have been developed, including the spare ones. In order to facilitate timely development of these power supplies, uniform power converter scheme for all power supplies has been followed and all associated low- power electronics, e.g. sensing, fault handling, auxiliary power sources, handling remote interface have been standardized. The topology used in these power supplies is two-switch forward converter operating with variable frequency PWM (VFPWM) control in the range from 20 kHz to 100 kHz. After the design, simulation studies, prototype development and rigorous testing of the prototype at RRCAT, the bulk production, testing and evaluation was carried out with the involvement of industry. This paper describes power supply design principles, highlights its salient features, shares the development experience and discusses the test results. (author)

  2. Real-Time Control, Acquisition and Data Treatment for Beam Current Transformers in a Transfer Line

    CERN Document Server

    Carter, C; Gelato, G; Lenardon, F; Ludwig, M; Schnell, J D

    1997-01-01

    Particle beams are transferred from the 1 GeV Booster to the 26 GeV Proton Synchrotron and to an experimental area, ISOLDE. The characteristics of the beams and their destination change on a 1.2 s cycle basis. There are six beam current transformers to measure the beam intensities, i.e. the number of particles passing through the transfer lines. On each pulse of the Booster, a real-time system, called BTTR (Beam Transfer TRansformers), acquires the transformer values, selects the range, executes a calibration, and treats the data. Part of the treatment is the subtraction of the base-value, which includes systematic perturbations, acquired in the absence of beam. The system also handles asynchronous tasks, such as acquisition of base-value, readout of calibration factors and other diagnostic actions. The concept of the BTTR and its design are presented, as well as some practical results.

  3. Injection line of 1+ ion beam for electron beam ion-charge breeding source and related beam elements

    International Nuclear Information System (INIS)

    Main purpose of the electron beam ion-charge breeding source (EBIBS) is to produce highly pure and highly charged ion beam from single charge ion of stable or radioactive species. It can accept low emittance ion beam from either online or offline ECR ion sources (ECRIS). The emittance of the extracted beam is low at lower RF frequencies and magnetic field of the ECRIS. The beam at the position of extraction is approximately reproduced at the entrance of the electron collector of the EBIBS. The beam moves forward under the influence of the negative potential deep of the electron beam and enters the ionization region in solenoid field of the EBIBS. The injection line starts at the extraction region of the ECRIS. The assumed parameters of the extracted beam of 20 keV energy and 0.0732 GeV/c momentum for injection are 10 mm diameter and 30 mrad beam divergence cone. As mass number of the ions decreases the energy decreases for constant momentum of the ion beam. The value of the momentum or the beam rigidity is judiciously chosen to encompass the most of the isotopes of various elements. The beam is focused by a quadrupole doublet and passes the beam through a 90° bending magnet. The beam is analyzed also by the dipole magnet to remove the contaminants and the selected ion beam is focused by a quadrupole doublet magnet to pass through an electrostatic 90° bending elements. The beam approaches the opening of 16 mm diameter of the electron collector. A round beam of 12 mm diameter is achieved here with the help of a quadrupole triplet through point-to-point imaging from start to the end. The transport matrices for the electrostatic bending elements were calculated and incorporated into the TRANSPORT code. (author)

  4. A polarized beam for the M-3 line

    International Nuclear Information System (INIS)

    A beamline is proposed for polarized protons to be built in the M-3 line of the Meson Laboratory utilizing lambda decays. This beamline would provide a clean source of polarized protons or an enriched beam of antiprotons or polarized antiprotons

  5. Optimum field size and choice of isodose lines in electron beam treatment

    International Nuclear Information System (INIS)

    Purpose: A method is provided for the optimum field size and the choice of isodose line for the dose prescription in electron beam therapy. Methods and Materials: Electron beam dose uniformity was defined in terms of target coverage factor (TCF) which is an index of dose coverage of a given treatment volume. The TCF was studied with respect to the field size, the beam energy, and the isodose level for prescription from the measured data for various accelerators. The effect of the TCF on air gap between electron applicator/cone and the surface was investigated. Electron beams from scattering foil and scanned beam units were analyzed for the target coverage. Results: A mathematical method is provided to optimize a field size for target coverage by a given isodose line in terms of TCF which is strongly dependent on the type of accelerator and the design of the collimator. For a given type of collimating system, the TCF does not depend on the type of electron beam production (scattering foil or swept scanned beam). Selection of isodose line for dose prescription is very critical for the value of the TCF and the dose coverage. The TCF is inversely proportional to the isodose value selected for the treatment and nearly linear with field size and beam energy. Air gap between applicator and the surface reduces the dose uniformity. Tertiary collimator moderately improves the lateral coverage for high energy beams. Conclusions: To adequately cover the target volume in electron beam treatment, lateral and depth coverage should be considered. The coverage at depth is strongly dependent on the choice of isodose line or beam normalization. If the dose prescription is at dmax (i.e., the 100% isodose line is selected), the choice of beam energy is not critical for depth coverage since dmax is nearly independent of energy for smaller fields. The 100% isodose line should not be chosen for treatment because of the significant constriction of this isodose line and inadequate coverage

  6. Conceptual design of the JT-60 neutral beam injection system (interim report)

    International Nuclear Information System (INIS)

    This is an interim report on conceptual design of the JT-60 neutral beam injection system. Requirements for the JT-60 neutral beam injector are injection of a 20 MW neutral hydrogen beam into the plasma in the vicinity of energy 75 keV as long as 10 sec, keeping thermal gas flow rate into the torus vacuum chamber below 15% the neutral beam flux. On the basis of these requirements and recent results of research and development of ion sources and beam line components, system conceptual design is now proceeding. Scale of the JT-60 neutral beam injection system is discussed, indicating also future problems. (auth.)

  7. Error analysis in post linac to driver linac transport beam line of RAON

    Science.gov (United States)

    Kim, Chanmi; Kim, Eun-San

    2016-07-01

    We investigated the effects of magnet errors in the beam transport line connecting the post linac to the driver linac (P2DT) in the Rare Isotope Accelerator in Korea (RAON). The P2DT beam line is bent by 180-degree to send the radioactive Isotope Separation On-line (ISOL) beams accelerated in Linac-3 to Linac-2. This beam line transports beams with multi-charge state 132Sn45,46,47. The P2DT beam line includes 42 quadrupole, 4 dipole and 10 sextupole magnets. We evaluate the effects of errors on the trajectory of the beam by using the TRACK code, which includes the translational and the rotational errors of the quadrupole, dipole and sextupole magnets in the beam line. The purpose of this error analysis is to reduce the rate of beam loss in the P2DT beam line. The distorted beam trajectories can be corrected by using six correctors and seven monitors.

  8. Lessons from shielding retrofits at the LAMPF/LANSCE/PSR accelerator, beam lines and target facilities

    International Nuclear Information System (INIS)

    The experience in the past 7 years to improve the shielding and radiation control systems at the Los Alamos Meson Physics Facility (LAMPF) and the Manuel Lujan Jr. Neutron Scattering Center (LANSCE) provides important lessons for the design of radiation control systems at future, high beam power proton accelerator facilities. Major issues confronted and insight gained in developing shielding criteria and in the use of radiation interlocks are discussed. For accelerators and beam lines requiring hands-on-maintenance, our experience suggests that shielding criteria based on accident scenarios will be more demanding than criteria based on routinely encountered beam losses. Specification and analysis of the appropriate design basis accident become all important. Mitigation by active protection systems of the consequences of potential, but severe, prompt radiation accidents has been advocated as an alternate choice to shielding retrofits for risk management at both facilities. Acceptance of active protection systems has proven elusive primarily because of the difficulty in providing convincing proof that failure of active systems (to mitigate the accident) is incredible. Results from extensive shielding assessment studies are presented including data from experimental beam spill tests, comparisons with model estimates, and evidence bearing on the limitations of line-of-sight attenuation models in complex geometries. The scope and significant characteristics of major shielding retrofit projects at the LAMPF site are illustrated by the project to improve the shielding beneath a road over a multiuse, high-intensity beam line (Line D)

  9. ATA diagnostic beam dump conceptual design

    International Nuclear Information System (INIS)

    A diagnostic beam dump, able to withstand 72,000 pulses (10 kA, 50 MeV/pulse) per shift was designed and analyzed. The analysis shows that the conceptual beam dump design consisting of 80 vitreous carbon plate-foam elements is able to withstand the thermal and mechanical stresses generated. X-rays produced by bremsstrahlung are absorbed by a three element copper plate-foam x-ray absorber. Cooling between bursts of electron pulses is provided by pressurized helium

  10. Materials research and beam line operation utilizing NSLS [National Synchrotron Light Source]: Progress report

    International Nuclear Information System (INIS)

    MATRIX is a group of scientists who have common interests in utilizing x-ray synchrotron radiation for materials research. This group has developed a specialized beam line (X-18A) for x-ray scattering studies at the National Synchrotron Light Source (NSLS). The beam line was designed to optimize experimental conditions for diffuse scattering and surface/interface studies. An extension of diffuse scattering to provide better quantitative data has been shown as well as a unique application to the solution of the phase problem. In the x-ray surface scattering area the first reported experiment to illustrate the capabilities for studying monolayers on water was performed. Current beam line upgrade projects are also described. In addition to a change to a UHV system and improvements dictated by operational experience, two new systems are described, a unique small angle scattering chamber (SAXS) for dynamic studies of nucleation and growth and a surface scattering chamber. 5 figs

  11. Linac design for intense hadron beams

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Chuan

    2009-12-14

    Based on the RFQ and H-type DTL structures, this dissertation is dedicated to study the beam dynamics in the presence of significantly strong space-charge effects while accelerating intense hadron beams in the low- and medium-{beta} region. Besides the 5 mA/30 mA, 17 MeV proton injector (RFQ+DTL) and the 125 mA, 40 MeV deuteron DTL of the EUROTRANS and IFMIF facilities, a 200 mA, 700 keV proton RFQ has been also intensively studied for a small-scale but ultra-intense neutron source FRANZ planned at Frankfurt University. The most remarkable properties of the FRANZ RFQ and the IFMIF DTL are the design beam intensities, 200 mA and 125 mA. A new design approach, which can provide a balanced and accelerated beam bunching at low energy, has been developed for intense beams. To design the IFMIF DTL and the injector DTL part of the EUROTRANS driver linac, which have been foreseen as the first real applications of the novel superconducting CH-DTL structure, intensive attempts have been made to fulfill the design goals under the new conditions. For the IFMIF DTL, the preliminary IAP design has been considerably improved with respect to the linac layout as well as the beam dynamics. By reserving sufficient drift spaces for the cryosystem, diagnostic devices, tuner and steerer, introducing SC solenoid lenses and adjusting the accelerating gradients and accordingly other configurations of the cavities, a more realistic, reliable and efficient linac system has been designed. On the other hand, the specifications and positions of the transverse focusing elements as well as the phase- and energy-differences between the bunch-center particle and the synchronous particle at the beginning of the {phi}{sub s}=0 sections have been totally redesigned. For the EUROTRANS injector DTL, in addition to the above-mentioned procedures, extra optimization concepts to coordinate the beam dynamics between two intensities have been applied. In the beam transport simulations for both DTL designs

  12. Linac design for intense hadron beams

    International Nuclear Information System (INIS)

    Based on the RFQ and H-type DTL structures, this dissertation is dedicated to study the beam dynamics in the presence of significantly strong space-charge effects while accelerating intense hadron beams in the low- and medium-β region. Besides the 5 mA/30 mA, 17 MeV proton injector (RFQ+DTL) and the 125 mA, 40 MeV deuteron DTL of the EUROTRANS and IFMIF facilities, a 200 mA, 700 keV proton RFQ has been also intensively studied for a small-scale but ultra-intense neutron source FRANZ planned at Frankfurt University. The most remarkable properties of the FRANZ RFQ and the IFMIF DTL are the design beam intensities, 200 mA and 125 mA. A new design approach, which can provide a balanced and accelerated beam bunching at low energy, has been developed for intense beams. To design the IFMIF DTL and the injector DTL part of the EUROTRANS driver linac, which have been foreseen as the first real applications of the novel superconducting CH-DTL structure, intensive attempts have been made to fulfill the design goals under the new conditions. For the IFMIF DTL, the preliminary IAP design has been considerably improved with respect to the linac layout as well as the beam dynamics. By reserving sufficient drift spaces for the cryosystem, diagnostic devices, tuner and steerer, introducing SC solenoid lenses and adjusting the accelerating gradients and accordingly other configurations of the cavities, a more realistic, reliable and efficient linac system has been designed. On the other hand, the specifications and positions of the transverse focusing elements as well as the phase- and energy-differences between the bunch-center particle and the synchronous particle at the beginning of the φs=0 sections have been totally redesigned. For the EUROTRANS injector DTL, in addition to the above-mentioned procedures, extra optimization concepts to coordinate the beam dynamics between two intensities have been applied. In the beam transport simulations for both DTL designs, no beam losses

  13. First on-line results from the CRIS (Collinear Resonant Ionisation Spectroscopy) beam line at ISOLDE

    International Nuclear Information System (INIS)

    The CRIS (Collinear Resonant Ionisation Spectroscopy) experiment at the on-line isotope separator facility, ISOLDE, CERN, has been constructed for high-sensitivity laser spectroscopy measurements on radioactive isotopes. The technique determines the magnetic dipole and electric quadrupole moments, nuclear spin and changes in mean-square charge radii of exotic nuclei via measurement of their hyperfine structures and isotope shifts. In November 2011 the first on-line run was performed using the CRIS beam line, when the hyperfine structure of 207Fr was successfully measured. This paper will describe the technique and experimental setup of CRIS and present the results from the first on-line experiment.

  14. Overhead power lines. Planning, design, construction

    Energy Technology Data Exchange (ETDEWEB)

    Kiessling, F.; Nefzger, P.; Nolasco, J.F.; Kaintzyk, U. [Siemens AG, Power Transmission and Distribution, Erlangen (Germany)

    2003-07-01

    The basic elements of overhead power line technology have been known for many years. However, this technology has continuously developed, for example, to adjust design of the lines to new transmission needs, to available rights-of-way, and to accommodate environmental concerns or resources. Since many existing overhead line installations are approaching the end of their economic and technical lifetime, strategies for maintenance to extending their operational life are needed. Also, because fo the introduction of new standards and deregulation, the basis of design and verification for all aspects and steps in overhead line planning and construction has changed. The industry, therefore, requires a publication reflecting these developments and changes. Overhead Power Lines presents not only the scientific and engineering basis for the electric and mechanical design, but also comprehensively describes all aspects of most recent technology, including the selection and design of components such as conductors, insulators, fittings, supports and foundations. The chapters on line survey, construction and maintenance address updated requirements and solutions. In addition, the book carefully considers the changing economic and technical environment of the overhead power line business. This publication is intended to introduce students and beginners to the full range of relevant topics of line design and implementation and to serve as a valuable reference to engineers and technicians employed by overhead line operators, contractors and consulting companies to carry out their daily tasks. The book also supplies everyone else in the electric-energy supply industry, including design, maintenance, and construction engineers, with a ready reference. This first English-language edition is based on the 5th German-language edition and incorporates the latest international standards edited by Cigre, the International Council of Large Electric Systems, IEC and CENELEC. The authors are

  15. Beam manipulation and acceleration with Dielectric-Lined Waveguides

    Energy Technology Data Exchange (ETDEWEB)

    Lemery, Francois [Northern Illinois Univ., DeKalb, IL (United States)

    2015-06-01

    The development of next-generation TeV+ electron accelerators will require either immense footprints based on conventional acceleraton techniques or the development of new higher{gradient acceleration methods. One possible alternative is beam-driven acceleration in a high-impedance medium such as a dielectric-lined-waveguide (DLW), where a highcharge bunch passes through a DLW and can excite gradients on the order of GV/m. An important characteristic of this acceleration class is the transformer ratio which characterizes the energy transfer of the scheme. This dissertation discusses alternative methods to improve the transformer ratio for beam-driven acceleration and also considers the use of DLWs for beam manipulation at low energy.

  16. Physics at the new CERN neutron beam line

    CERN Document Server

    Guerrero, C

    2014-01-01

    A new neutron beam line (n_TOF EAR - 2) is being built at CERN within the n_TOF facility. Compared to the existing 185 meters long time - of - flight beam line, the new one (which will operate in parallel) will feature a shorter flight of 20 meters, providing a 2 7 times more intense neutron flux extending from thermal to 300 MeV. The scientific program is now bein g discussed and the first detailed proposals will be refereed by February 2014. This contribution is devoted to present and discuss the expected performance of the facility, briefly, and the details of some of the first measureme nts foreseen for 2014 and 2015.

  17. The Imaging and Medical Beam Line at the Australian Synchrotron

    Science.gov (United States)

    Hausermann, Daniel; Hall, Chris; Maksimenko, Anton; Campbell, Colin

    2010-07-01

    As a result of the enthusiastic support from the Australian biomedical, medical and clinical communities, the Australian Synchrotron is constructing a world-class facility for medical research, the `Imaging and Medical Beamline'. The IMBL began phased commissioning in late 2008 and is scheduled to commence the first clinical research programs with patients in 2011. It will provide unrivalled x-ray facilities for imaging and radiotherapy for a wide range of research applications in diseases, treatments and understanding of physiological processes. The main clinical research drivers are currently high resolution and sensitivity cardiac and breast imaging, cell tracking applied to regenerative and stem cell medicine and cancer therapies. The beam line has a maximum source to sample distance of 136 m and will deliver a 60 cm by 4 cm x-ray beam1—monochromatic and white—to a three storey satellite building fully equipped for pre-clinical and clinical research. Currently operating with a 1.4 Tesla multi-pole wiggler, it will upgrade to a 4.2 Tesla device which requires the ability to handle up to 21 kW of x-ray power at any point along the beam line. The applications envisaged for this facility include imaging thick objects encompassing materials, humans and animals. Imaging can be performed in the range 15-150 keV. Radiotherapy research typically requires energies between 30 and 120 keV, for both monochromatic and broad beam.

  18. The Imaging and Medical Beam Line at the Australian Synchrotron

    International Nuclear Information System (INIS)

    As a result of the enthusiastic support from the Australian biomedical, medical and clinical communities, the Australian Synchrotron is constructing a world-class facility for medical research, the 'Imaging and Medical Beamline'. The IMBL began phased commissioning in late 2008 and is scheduled to commence the first clinical research programs with patients in 2011. It will provide unrivalled x-ray facilities for imaging and radiotherapy for a wide range of research applications in diseases, treatments and understanding of physiological processes. The main clinical research drivers are currently high resolution and sensitivity cardiac and breast imaging, cell tracking applied to regenerative and stem cell medicine and cancer therapies. The beam line has a maximum source to sample distance of 136 m and will deliver a 60 cm by 4 cm x-ray beam1 - monochromatic and white - to a three storey satellite building fully equipped for pre-clinical and clinical research. Currently operating with a 1.4 Tesla multi-pole wiggler, it will upgrade to a 4.2 Tesla device which requires the ability to handle up to 21 kW of x-ray power at any point along the beam line. The applications envisaged for this facility include imaging thick objects encompassing materials, humans and animals. Imaging can be performed in the range 15-150 keV. Radiotherapy research typically requires energies between 30 and 120 keV, for both monochromatic and broad beam.

  19. Modeling the Biophysical Effects in a Carbon Beam Delivery Line using Monte Carlo Simulation

    CERN Document Server

    Cho, Ilsung; Cho, Sungho; Kim, Eun Ho; Song, Yongkeun; Shin, Jae-ik; Jung, Won-Gyun

    2016-01-01

    Relative biological effectiveness (RBE) plays an important role in designing a uniform dose response for ion beam therapy. In this study the biological effectiveness of a carbon ion beam delivery system was investigated using Monte Carlo simulation. A carbon ion beam delivery line was designed for the Korea Heavy Ion Medical Accelerator (KHIMA) project. The GEANT4 simulation tool kit was used to simulate carbon beam transporting into media. An incident energy carbon ion beam in the range between 220 MeV/u and 290 MeV/u was chosen to generate secondary particles. The microdosimetric-kinetic (MK) model is applied to describe the RBE of 10% survival in human salivary gland (HSG) cells. The RBE weighted dose was estimated as a function of the penetrating depth of the water phantom along the incident beam direction. A biologically photon-equivalent Spread Out Bragg Peak (SOBP) was designed using the RBE weighted absorbed dose. Finally, the RBE of mixed beams was predicted as a function of the water phantom depth.

  20. Compressor Lattice Design for SPL Beam

    CERN Document Server

    Aiba, M

    2007-01-01

    A compressor ring providing very short proton bunches of a few ns has been designed as a component of a proton driver in the neutrino factory. Proton beams accelerated with the SPL (Superconducting Proton Linac) are stored in an accumulator ring before being transported to a compressor ring. The bunch compression is then performed with longitudinal phase rotation. For the neutrino factory, a special pulse structure of the primary proton beam is required. In the SPL based proton driver, the specification imposes that six (or five) bunches of a few ns length and about 12μs bunch spacing are formed in one cycle.

  1. Single Pass Stripline Beam Position Monitor Design, Fabrication and Commissioning

    Science.gov (United States)

    Tan, Y.-R. E.; Wang, D.; Van Garderen, E.; McKinlay, J.

    2012-10-01

    To monitor the position of the electron beam during transport from the Booster Synchrotron to the Storage Ring at the Australian Synchrotron, a stripline Beam Position Monitor (BPM) has been designed, fabricated and installed in-house. The design was based on an existing stripline in the Booster and modified for the transfer line with a particular emphasis on ensuring the line impedance is properly matched to the detector system. The initial bench tests of a prototype stripline showed that the fabrication of the four individual striplines in the BPM was made precisely, each with a measured standing wave ratio (SWR) of 1.8 at 500 MHz. Further optimization for impedance matching will be done for new stripline BPMs. The linearity and gain factor was measured with the detector system. The detector system that digitizes the signals is an Instrumentation Technologies Brilliance Single Pass [1]. The results show an error of 1 mm at an offset (from the electrical centre) of 10 mm when a linear gain factor is assumed and an RMS noise of ~150 um that decreases to < 10 um with increasing signal intensity. The results were under our requirements for the transport line. The commissioning results of the stripline will also be presented showing a strong signal for an electron beam with an estimated integrated charge of ~50 nC with a position stability of 28 um (horizontal) and 75 um (vertical).

  2. Single Pass Stripline Beam Position Monitor Design, Fabrication and Commissioning

    Directory of Open Access Journals (Sweden)

    McKinlay J.

    2012-10-01

    Full Text Available To monitor the position of the electron beam during transport from the Booster Synchrotron to the Storage Ring at the Australian Synchrotron, a stripline Beam Position Monitor (BPM has been designed, fabricated and installed in-house. The design was based on an existing stripline in the Booster and modified for the transfer line with a particular emphasis on ensuring the line impedance is properly matched to the detector system. The initial bench tests of a prototype stripline showed that the fabrication of the four individual striplines in the BPM was made precisely, each with a measured standing wave ratio (SWR of 1.8 at 500 MHz. Further optimization for impedance matching will be done for new stripline BPMs. The linearity and gain factor was measured with the detector system. The detector system that digitizes the signals is an Instrumentation Technologies Brilliance Single Pass [1]. The results show an error of 1 mm at an offset (from the electrical centre of 10 mm when a linear gain factor is assumed and an RMS noise of ~150 um that decreases to < 10 um with increasing signal intensity. The results were under our requirements for the transport line. The commissioning results of the stripline will also be presented showing a strong signal for an electron beam with an estimated integrated charge of ~50 nC with a position stability of 28 um (horizontal and 75 um (vertical.

  3. Conceptual design for transmission line inspection robot

    International Nuclear Information System (INIS)

    Power transmission line is used for power distribution purposes due to their cost effective measure compared to underlying cable. However, prolonged exposure to natural weather may cause fatigue stress to the lines as well as induce material failure. Therefore, periodical line inspection is considered uttermost important as a preventive measure to avoid power outage. However, transmission line inspection has always been a high risk and expensive work. Hazardous works that may harm operator as well as routine that requires precise handling can be performed by robots. Various types of robots have been designed and developed for line inspection but only perform well on a straight and continuous line. As these robots encounter an obstacle during the inspection, then the real problem in terms of robot stability and smooth operation arises. In this paper, conceptual design and evaluation for transmission line inspection robot is presented. The inspection robot mobile robot must be able to bypass or avoid obstacles as it travels along the power transmission line.

  4. Ray tracing studies of a complete plane grating monochromator beam line

    International Nuclear Information System (INIS)

    Optical design of a plane grating monochromator beam line for X-ray spectroscopic studies to be installed on Indus-1 is studied using ray tracing technique. The main components of the beam line are pre- and post-elliptical mirrors and the plane mirror-grating dispersing system. The ideal position of the optical components are decided by using our analytical formulation of the Riemer's kinetic principle for reflecting synchrotron radiation onto the same spot of the dispersing grating. The program is developed indigenously and can be used on a PC. The tangent error and micro roughness of the mirrors is explicitly accounted for in the program. The wavelength dependent absorption of radiation at the different reflecting surfaces is also included for calculations of the optical throughput. The dependence of the final image line shape and resolution on various beam line parameters is calculated. The results are useful in deciding the tolerances of the various beam line components and their positions. (author). 8 figs., 4 tabs., 13 refs., 1 appendix

  5. CEBAF [Continuous Electron Beam Accelerator Facility] design report

    International Nuclear Information System (INIS)

    This book describes the conceptual design of, and the planning for, the Continuous Electron Beam Accelerator Facility (CEBAF), which will be a high-intensity, continuous-wave electron linear accelerator (linac) for nuclear physics. Its principal scientific goal is to understand the quark structure, behavior, and clustering of individual nucleons in the nuclear medium, and simultaneously to understand the forces governing this behavior. The linac will consist of 1 GeV of accelerating structure, split into two antiparallel 0.5-GeV segments. The segments will be connected by a beam transport system to circulate the electron beams from one segment to the other for up to four complete passes of acceleration. The maximum beam energy will be 4 GeV at a design current of 200 microamperes. The accelerator complex will also include systems to extract three continuous beams from the linac and to deliver them to three experimental halls equipped with detectors and instrumentation for nuclear physics research. The accelerating structure will be kept superconducting within insulated cryostats filled with liquid helium produced at a central helium refrigerator and distributed to the cryostats via insulated transfer lines. An injector, instrumentation and controls for the accelerator, radio-frequency power systems, and several support facilities will also be provided. A cost estimate based on the Work Breakdown Structure has been completed. Assuming a five-year construction schedule starting early in FY 1987, the total estimated cost is $236 million (actual year dollars), including contingency

  6. Application of object oriented techniques in the TRIUMF beam line 2C control system

    International Nuclear Information System (INIS)

    The KAON Factory central control system study employed a uniform approach to requirements analysis, architectural design and programming based on well established object oriented principles. These principles were applied to the successful analysis, design and implementation of the control system for the TRIUMF Beam Line 2C Solid Target Facility. The specification for this control system was created in collaboration with Beam Line 2C equipment management experts and, once the analysis models were validated, an approach was developed for the direct translation of these models into C code. A commercial real time database was central to this translation, as inter-object data and control flows are implemented by channels in the database. This paper focuses on the experience gained in the use of object oriented techniques during the complete analysis-design-implementation cycle of a working control system and on the utility of implementing such a system using a commercial real time database and graphical interface. (author)

  7. Selection and evaluation of an ultra high vacuum gate valve for Isabelle beam line vacuum system

    Energy Technology Data Exchange (ETDEWEB)

    Foerster, C L; McCafferty, D

    1980-01-01

    A minimum of eighty-four (84) Ultra High Vacuum Gate Valves will be utilized in ISABELLE to protect proton beam lines from catastrophic vacuum failure and to provide sector isolation for maintenance requirements. The valve to be selected must function at less than 1 x 10/sup -11/ Torr pressure and be bakeable to 300/sup 0/C in its open or closed position. In the open position, the valve must have an RF shield to make the beam line walls appear continuous. Several proposed designs were built and evaluated. The evaluation consisted mainly of leak testing, life tests, thermal cycling, mass spectrometer analysis, and 10/sup -12/ Torr operation. Problems with initial design and fabrication were resolved. Special requirements for design and construction were developed. This paper describes the tests on two final prototypes which appear to be the best candidates for ISABELLE operation.

  8. Conceptual Design Considerations for the 50 TeV FCC Beam Dump Insertion

    CERN Document Server

    Burkart, Florian; Barna, Daniel; Bartmann, Wolfgang; Goddard, Brennan; Kramer, Thomas; Lechner, Anton; Sanz Ull, Alejandro; Schulte, Daniel; Stoel, Linda

    2016-01-01

    Safely extracting and absorbing the 50 TeV proton beams of the FCC-hh collider will be a major challenge. Two extended straight sections (ESS) are dedicated to beam dumping system and collimation. The beam dumping system will fast-extract the beam and transport it to an external absorber, while the collimation system will protect the superconducting accelerator components installed further downstream. The high stored beam energy of about 8.5 GJ per beam means that machine protection considerations will severely constrain the functional design of the ESS and the beam dump line geometry, in addition to dominating the performance specifications of the main sub-systems like kickers and absorber blocks. The general features, including concept choice, optics in the ESS and beam dump line, passive protection devices, layout and integration are described and discussed.

  9. Parametric study of transport beam lines for electron beams accelerated by laser-plasma interaction

    Science.gov (United States)

    Scisciò, M.; Lancia, L.; Migliorati, M.; Mostacci, A.; Palumbo, L.; Papaphilippou, Y.; Antici, P.

    2016-03-01

    In the last decade, laser-plasma acceleration of high-energy electrons has attracted strong attention in different fields. Electrons with maximum energies in the GeV range can be laser-accelerated within a few cm using multi-hundreds terawatt (TW) lasers, yielding to very high beam currents at the source (electron bunches with up to tens-hundreds of pC in a few fs). While initially the challenge was to increase the maximum achievable electron energy, today strong effort is put in the control and usability of these laser-generated beams that still lack of some features in order to be used for applications where currently conventional, radio-frequency (RF) based, electron beam lines represent the most common and efficient solution. Several improvements have been suggested for this purpose, some of them acting directly on the plasma source, some using beam shaping tools located downstream. Concerning the latter, several studies have suggested the use of conventional accelerator magnetic devices (such as quadrupoles and solenoids) as an easy implementable solution when the laser-plasma accelerated beam requires optimization. In this paper, we report on a parametric study related to the transport of electron beams accelerated by laser-plasma interaction, using conventional accelerator elements and tools. We focus on both, high energy electron beams in the GeV range, as produced on petawatt (PW) class laser systems, and on lower energy electron beams in the hundreds of MeV range, as nowadays routinely obtained on commercially available multi-hundred TW laser systems. For both scenarios, our study allows understanding what are the crucial parameters that enable laser-plasma accelerators to compete with conventional ones and allow for a beam transport. We show that suitable working points require a tradeoff-combination between low beam divergence and narrow energy spread.

  10. Computer study of an energy recovery system for the Tore-Supra neutral beam injection lines

    International Nuclear Information System (INIS)

    The prototype of an Energy Recovery System (ERS) has been designed for the Tore-Supra neutral beam injection lines (100 kV, 40 A deuterium beams). Our study, based on computer calculations using a 2-D charged particle trajectory program, consisted mainly in the optimisation of the components of the ERS, but it has been extended in order to draw general conclusions on some problems that might be encountered and to derive scaling laws for the suppression voltage determination. In our system, the power saving can be as large as 1 MW per injection line, i.e. about 25 % of the total power that would be spent without energy recovery. The recovery on higher energy beams has also been investigated; the power gain would be even larger in this case

  11. Beam-line considerations for experiments with highly-charged ions

    International Nuclear Information System (INIS)

    The APS offers exciting possibilities for a bright future in x-ray research. For example, measurements on the inner-shell photoionization of ions will be feasible using stored ions in ions traps or ion beams from an electron-cyclotron-resonance ion source, or perhaps even a heavy-ion storage ring. Such experiments with ionic targets are the focus for the discussion given here on the optimization of photon flux on a generic beamline at the APS. The performance of beam lines X26C, X26A, and X17 on the x-ray ring of the National Synchrotron Light Source will be discussed as specific examples of beam-line design considerations

  12. Model to Design Drip Hose Lateral Line

    Science.gov (United States)

    Ludwig, Rafael; Cury Saad, João Carlos

    2014-05-01

    Introduction The design criterion for non-pressure compensating drip hose is normally to have 10% of flow variation (Δq) in the lateral line, corresponding to 20% of head pressure variation (ΔH). Longer lateral lines in drip irrigation systems using conventional drippers provide cost reduction, but it is necessary to obtain to the uniformity of irrigation [1]. The use of Δq higher levels can provide longer lateral lines. [4] proposes the use of a 30% Δq and he found that this value resulted in distribution uniformity over 80%. [1] considered it is possible to extend the lateral line length using two emitters spacing in different section. He assumed that the spacing changing point would be at 40% of the total length, because this is approximately the location of the average flow according with [2]. [3] found that, for practical purposes, the average pressure is located at 40% of the length of the lateral line and that until this point it has already consumed 75% of total pressure head loss (hf ). In this case, the challenge for designers is getting longer lateral lines with high values of uniformity. Objective The objective of this study was to develop a model to design longer lateral lines using non-pressure compensating drip hose. Using the developed model, the hypotheses to be evaluated were: a) the use of two different spacing between emitters in the same lateral line allows longer length; b) it is possible to get longer lateral lines using high values of pressure variation in the lateral lines since the distribution uniformity stays below allowable limits. Methodology A computer program was developed in Delphi® based on the model developed and it is able to design lateral lines in level using non-pressure compensating drip hose. The input data are: desired distribution uniformity (DU); initial and final pressure in the lateral line; coefficients of relationship between emitter discharge and pressure head; hose internal diameter; pipe cross-sectional area

  13. Mission critical operation archiving system using a database for synchrotron radiation beam lines at the Photon Factory

    International Nuclear Information System (INIS)

    The mission critical operation archiving system has been designed and built using the Oracle database for the twenty-two synchrotron radiation beam lines at the 2.5 GeV positron storage ring at the Photon Factory, where X-ray/VUV synchrotron radiation experiments are simultaneously carried out. When any one of beam lines is malfunctioning, neither injecting the 2.5 GeV beam into the storage ring nor operation of the ring is allowed due to the radiation safety reason. The system is designed for critical operation of the synchrotron radiation beam lines to provide a quick recovery from a failure, allowing a long term operation. The system has real-time capability to automatically store the database with all possible operational events of all vacuum valves/shutters and safety interlock signals, and all static operational data, including the pressures of the beam lines and the storage ring, and related operational data which represent the physical behaviors of the beam lines. By retrieving any combination of operational data, the system allows to reproduce the physical behaviors that have occurred in the beam lines. The total number of items to be inspected by the system is over 40 million in order to obtain a correlation between the faulty component and other physical components that suggests the cause of the failure. With the aid of the system, the operator at the control room can easily determine the faulty component, and recover the accelerator component. (author)

  14. The interaction of a beam with a beam line higher-order mode absorber

    International Nuclear Information System (INIS)

    Plans for CESR-B, the proposed upgrade of the CESR e+e- storage ring to a B-factory, call for beam currents of ∼ 1 A. Studies indicate that the beams will be unstable unless the higher-order modes (HOMs) in the superconducting cavities are strongly damped; Q ≤ 100 is required for the dangerous modes. The cavity is designed to enable all HOMs to propagate into the beam pipe, where a layer of microwave-absorbing ferrite is to provide the damping. RF measurements with a full-size mock-up of the cavity and loads made of two types of ferrite, TT2-111-series and Ferrite-50, indicate that this scheme provides the required damping. The HOM loads can also interact directly with the beam. Preliminary predictions for the effect of loads made of TT2-111V ferrite on beam stability in CESR-B are given in this paper

  15. Issues for Bringing Electron Beam Irradiators On-Line

    International Nuclear Information System (INIS)

    Irradiation of red meat and poultry has been approved by the U.S. FDA, and the U.S. Department of Agriculture's rule for processing red meat is out for comment. Looking beyond the current issues of packaging materials, labeling, and consumer acceptance, this paper reviews the next step of implementation and how to remove, or at least reduce, the barriers to utilization. Polls of the user community identified their requirements for electron beam or x-ray processing of meat or poultry and their concerns about implementation for on-line processing. These needs and issues are compared to the capabilities of the accelerator industry. The critical issues of beam utilization and dose uniformity, factors affecting floor space requirements, and treatment costs are examined

  16. High beam current shut-off systems in the APS linac and low energy transfer line

    International Nuclear Information System (INIS)

    Two independent high beam current shut-off current monitoring systems (BESOCM) have been installed in the APS linac and the low energy transport line to provide personnel safety protection in the event of acceleration of excessive beam currents. Beam current is monitored by a fast current transformer (FCT) and fully redundant supervisory circuits connected to the Access Control Interlock System (ACIS) for beam intensity related shutdowns of the linac. One FCT is located at the end of the positron linac and the other in the low energy transport line, which directs beam to the positron accumulator ring (PAR). To ensure a high degree of reliability, both systems employ a continuous self-checking function, which injects a test pulse to a single-turn test winding after each ''real'' beam pulse to verify that the system is fully functional. The system is designed to be fail-safe for all possible system faults, such as loss of power, open or shorted signal or test cables, loss of external trigger, malfunction of gated integrator, etc. The system has been successfully commissioned and is now a reliable part of the total ACIS

  17. Beam line I411 at MAX II--performance and first results

    CERN Document Server

    Baessler, M; Jurvansuu, M; Feifel, R; Forsell, J O; Tarso-Fonseca, P D; Kivimaeki, A; Sundin, S; Sorensen, S L; Nyholm, R; Bjoerneholm, O; Aksela, S; Svensson, S

    2001-01-01

    We report on the characteristics and first results from the soft X-ray beam line I411, based on an undulator at the third generation synchrotron facility MAX II, Sweden. The beam line is designed for high-resolution, angle-resolved electron spectroscopy on gases, liquids and solids. Main components are the modified SX700 monochromator and the end station, both of which were previously used at beam line 51 at MAX I. The end station is equipped with a rotatable SES-200 hemispherical electron-analyser. Before the end station, a one-metre section is reserved for exchangeable experimental set-ups. The usable photon energy range is 50-1500 eV and the photon flux is two orders of magnitudes higher compared to beam line 51. At 400 eV a resolving power of about 5700 in the first order of the monochromator grating could be obtained. In gas phase, a total electron energy resolution of 16 meV has been achieved. Detailed results on the undulator performance, flux, photon and electron energy resolution as well as some tech...

  18. Safety in the design of production lines

    DEFF Research Database (Denmark)

    Dyhrberg, Mette Bang; Broberg, Ole; Jacobsen, Peter

    2006-01-01

    This paper is a case study report on how safety considerations were handled in the process of redesigning a production line. The design process was characterized as a specification and negotiation process between engineers from the company and the supplier organization. The new production line...... became safer, but not as a result of any intentional plan to integrate safety aspects into the design process. Instead, the supplier’s design of a new piece of equipment had a higher built-in safety level. The engineering team in the company was aware of the importance of safety aspects neither in the...... ‘history workshop’ with the engineering team. The workshop clarified the sequence of events and discussions that took place during the design process and opened for a discussion of the role of safety aspects. During the workshop new insights emerged into the question of how to integrate safety aspects in...

  19. Response of optical hydrogen lines to beam heating: I. Electron beams

    CERN Document Server

    Kasparova, J; Heinzel, P; Karlicky, M; Moravec, Z

    2009-01-01

    We investigate the role of non-thermal electrons in the formation regions of Halpha, Hbeta, and Hgamma lines in order to unfold their influence on the formation of these lines. We concentrate on pulse-beam heating varying on a subsecond timescale. Furthermore, we theoretically explore possibility that a new diagnostic tool exists indicating the presence of non-thermal electrons in the flaring chromosphere based on observations of optical hydrogen lines. To model the evolution of the flaring atmosphere and the time-dependent hydrogen excitation and ionisation, we used a 1-D radiative hydrodynamic code combined with a test-particle code that simulates the propagation, scattering, and thermalisation of a power-law electron beam in order to obtain the flare heating and the non-thermal collisional rates due to the interaction of the beam with the hydrogen atoms. All calculated models have shown a time-correlated response of the modelled Balmer line intensities on a subsecond timescale, with a subsecond timelag beh...

  20. An EXAFS spectrometer on beam line 10B at the Photon Factory

    International Nuclear Information System (INIS)

    An EXAFS spectrometer installed on the beam line 10B at the Photon Factory is designed to cover the photon energy between 4 and 30 keV. Utilizing either a channel-cut or two flat silicon crystals as a monochromator, a beam intensity between 108 and 109 photons/sec is obtained at 9 keV with a resolution of 1 eV. The performance of the spectrometer, such as a signal-to-noise ratio or an energy resolution is demonstrated with examples of K edge absorption spectra of bromine, germanium, gallium arsenide, and zinc selenide. (author)

  1. Final Design Of ILC RTML Extraction Line For Single Stage Bunch Compressor

    International Nuclear Information System (INIS)

    The use of single stage bunch compressor (BC) in the International Linear Collider (ILC) Damping Ring to the Main Linac beamline (RTML) requires new design for the extraction line (EL). The EL located downstream of the BC will be used for both an emergency abort dumping of the beam and the tune-up continuous train-by-train extraction. It must accept both compressed and uncompressed beam with energy spread of 3.54% and 0.15% respectively. In this paper we report the final design that allowed minimizing the length of such extraction line while offsetting the beam dumps from the main line by 5m distance required for acceptable radiation level in the service tunnel. Proposed extraction line can accommodate beams with different energy spreads at the same time providing the beam size suitable for the aluminum ball dump window. We described the final design of the ILC RTML extraction line located downstream of the new single-stage bunch compressor. The extraction line is only 24m long and is capable of accepting and transmitting 220kW of beam power. The EL can be used for both fast intra-train and continual extraction, and is capable of accepting both 0.15% and 3.54% energy spread beams at 5MeV and 4.37MeV respectively.

  2. The Beam Line X NdFe-steel hybrid wiggler for SSRL

    International Nuclear Information System (INIS)

    A wiggler magnet with 15 periods, each 12.85 cm long, which achieves 1.40 T at a 2.1 cm gap (2.26T at 0.8 cm) has been designed and is now in fabrication at LBL. This wiggler will be the radiation source of the high intensity synchrotron radiation beam line for the Beam Line X PRT facility at SSRL. The magnet utilizes Neodymium-Iron (NdFe) material and Vanadium Permendur (steel) in the hybrid configuration to achieve simultaneously a high magnetic field and short period. Magnetic field adjustment is with a driven chain and ball screw drive system. The magnetic structure is external to an s.s. vacuum chamber which has thin walls, 0.76 mm thickness, at each pole tip for higher field operation. Magnetic design, construction details and magnetic measurements are presented

  3. The Beam Line X NdFe-steel hybrid wiggler for SSRL

    Energy Technology Data Exchange (ETDEWEB)

    Hoyer, E.; Halbach, K.; Humphries, D.; Marks, S.; Plate, D.; Shuman, D.; Karpenko, V.P.; Kulkarni, S.; Tirsell, K.G.

    1987-03-10

    A wiggler magnet with 15 periods, each 12.85 cm long, which achieves 1.40 T at a 2.1 cm gap (2.26T at 0.8 cm) has been designed and is now in fabrication at LBL. This wiggler will be the radiation source of the high intensity synchrotron radiation beam line for the Beam Line X PRT facility at SSRL. The magnet utilizes Neodymium-Iron (NdFe) material and Vanadium Permendur (steel) in the hybrid configuration to achieve simultaneously a high magnetic field and short period. Magnetic field adjustment is with a driven chain and ball screw drive system. The magnetic structure is external to an s.s. vacuum chamber which has thin walls, 0.76 mm thickness, at each pole tip for higher field operation. Magnetic design, construction details and magnetic measurements are presented.

  4. Preliminary design of bellows for the DNB beam source by EJMA and FE linear analysis

    International Nuclear Information System (INIS)

    In piping system, U-shaped Bellows are widely used among flexible elements. In general, bellows are typically design for Fatigue behavior according to the EJMA standard based on empirically generated fatigue curves. The present work proposes a methodology in the design of bellows by design by analyses and validates its design by EJMA standard. A linear FE approach is chosen to in line with the EJMA standard. The proposed methodology is benchmarked with the available literatures. The same practice is implemented in the preliminary design of a U-shaped bellows in the water line circuits of DNB beam source. DNB Beam Source is a negative ion source-based neutral beam generator for ITER operates at 100KV. The beam divergence (intrinsic) and magnetic fields from ITER torus causes deflection of beams. This calls for beam optic alignment, which are assured by BS Movement mechanism system. To accomplish the above movement requirements, bellows, which is a stringent of its kind (± 22 mm axial, ± 45 mm lateral within 400mm available space with single ply), is designed between the beam source and possible rigid interface-cooling lines coming from HVB. The paper describes right from conceptual stage to preliminary design. Optimization tools are adopted in the selecting bellow dimensions using MATLAB. At the end a coordinated approach between FE based assessment (in ANSYS) and widely applied code, EJMA is implemented for the validation of design and found FE approach is a very conservative than later in the present case. (author)

  5. Design of CMS Beam Halo Monitor system

    CERN Document Server

    AUTHOR|(CDS)2078842

    2015-01-01

    A fast and directional monitoring system for the CMS experiment is designed to provide an online, bunch-by-bunch measurement of beam background induced by beam halo interactions, separately for each beam. The background detection is based on Cherenkov radiation produced in synthetic fused silica read out by a fast, UV sensitive photomultiplier tube. Twenty detector units per end will be azimuthally distributed around the rotating shielding of CMS, covering ~408 cm2 at 20.6m from the interaction point, at a radius of ~180 cm. The directional and fast response of the system allows the discrimination of the background particles from the dominant flux in the cavern induced by pp collision debris, produced within the 25 ns bunch spacing. A robust multi-layered shielding will enclose each detector unit to protect the photomultiplier tube from the magnetic field and to eliminate the occupancy from low energy particles. The design of the front-end units is validated by experimental results. An overview of the new sy...

  6. Characterization of a tagged $\\gamma$-ray beam line at the DA$\\Phi$NE Beam Test Facility

    CERN Document Server

    Cattaneo, P W; Boffelli, F; Bulgarelli, A; Buonomo, B; Chen, A W; D'Ammando, F; Froysland, T; Fuschino, F; Galli, M; Gianotti, F; Giuliani, A; Longo, F; Marisaldi, M; Mazzitelli, G; Pellizzoni, A; Prest, M; Pucella, G; Quintieri, L; Rappoldi, A; Tavani, M; Trifoglio, M; Trois, A; Valente, P; Vallazza, E; Vercellone, S; Zambra, A; Barbiellini, G; Caraveo, P; Cocco, V; Costa, E; De Paris, G; Del Monte, E; Di Cocco, G; Donnarumma, I; Evangelista, Y; Feroci, M; Ferrari, A; Fiorini, M; Labanti, C; Lapshov, I; Lazzarotto, F; Lipari, P; Mastropietro, M; Mereghetti, S; Morelli, E; Moretti, E; Morselli, A; Pacciani, L; Perotti, F; Piano, G; Picozza, P; Pilia, M; Porrovecchio, G; Rapisarda, M; Rubini, A; Sabatini, S; Soffitta, P; Striani, E; Vittorini, V; Zanello, D; Colafrancesco, S; Giommi, P; Pittori, C; Santolamazza, P; Verrecchia, F; Salotti, L

    2011-01-01

    At the core of the AGILE scientific instrument, designed to operate on a satellite, there is the Gamma Ray Imaging Detector (GRID) consisting of a Silicon Tracker (ST), a Cesium Iodide Mini-Calorimeter and an Anti-Coincidence system of plastic scintillator bars. The ST needs an on-ground calibration with a $\\gamma$-ray beam to validate the simulation used to calculate the energy response function and the effective area versus the energy and the direction of the $\\gamma$ rays. A tagged $\\gamma$-ray beam line was designed at the Beam Test Facility (BTF) of the INFN Laboratori Nazionali of Frascati (LNF), based on an electron beam generating $\\gamma$ rays through Bremsstrahlung in a position-sensitive target. The $\\gamma$-ray energy is deduced by difference with the post-Bremsstrahlung electron energy \\cite{prest}-\\cite{hasan}. The electron energy is measured by a spectrometer consisting of a dipole magnet and an array of position sensitive silicon strip detectors, the Photon Tagging System (PTS). The use of the...

  7. A new guide concept for a homogenous neutron beam without direct line of sight

    Energy Technology Data Exchange (ETDEWEB)

    Cussen, Leo D., E-mail: ldc_0@yahoo.com.au [Helmholtz-Zentrum Berlin, Hahn-Meitner-Platz 1, 14109 Berlin (Germany); ESS Design Update Programme (Germany); Krist, Thomas, E-mail: krist@helmholtz-berlin.de [Helmholtz-Zentrum Berlin, Hahn-Meitner-Platz 1, 14109 Berlin (Germany); Lieutenant, Klaus, E-mail: klaus.lieutenant@helmholtz-berlin.de [Helmholtz-Zentrum Berlin, Hahn-Meitner-Platz 1, 14109 Berlin (Germany); ESS Design Update Programme (Germany)

    2015-03-21

    Neutron guide tubes are used to transport neutrons efficiently from the source to distant instruments. Ballistic neutron guides, which have an expanding section in the beginning and a contracting section in the end, reduce the total number of reflections and improve transport efficiency in long guides. Long pulse spallation sources like the European Spallation Source require very long guides. Challenges in ballistic guide design are imposed by the need for small virtual sources and the prevention of direct line of sight to the source, because both tend to produce inhomogeneous beam distributions, and the latter reduces transmission for short wavelengths. This article describes a novel ballistic guide design based on elliptic profiles. It incorporates a carefully positioned and angled kink to avoid line of sight to the source and a narrow point to position a chopper. This design reduces the number of reflections in long guides and improves transmission, especially at short wavelengths, compared to other solutions avoiding a direct line of sight.

  8. Harmonic beam splitter design and fabrication

    Institute of Scientific and Technical Information of China (English)

    Xiaofeng Ma(马小凤); Yingjian Wang(王英剑); Zhengxiu Fan(范正修); Jianda Shao(邵建达)

    2004-01-01

    Two problems of half-wave hole and high ripples in the transmittance region for a harmonic beam splitter had been pointed out and analyzed. Based on the application of a half-wavelength control and a new admittance matching methods, a harmonic beam splitter was designed and fabricated. The former method eliminated the half-wave hole fundamentally, and the latter smoothed high ripples in the transmittance region effectively. The matching stack consisted of a symmetrically periodic structure and provided a complete matching at the desired wavelength, i.e., both conditions for the equivalent admittance and phase thickness were fulfilled. Furthermore, both the theoretical and the tested curves had been given, and a good agreement between them was obtained.

  9. Beam emittance measurements and simulations of injector line for radio frequency quadrupole.

    Science.gov (United States)

    Mathew, Jose V; Rao, S V L S; Pande, Rajni; Singh, P

    2015-07-01

    A 400 keV deuteron (D(+)) radio frequency quadrupole (RFQ) accelerator has been designed, built, and commissioned at the Bhabha Atomic Research Centre, India. A beam line has been developed for injecting deuterons into the 400 keV RFQ. This comprises of a RF plasma ion source and a low energy beam transport (LEBT) system, consisting of two solenoid magnets and two steerer magnets. The ion source is characterized in terms of transverse beam emittance. A slit-wire scanner based emittance measurement setup has been developed for the transverse emittance measurements of H(+) and D(+) beams. The measured emittance values are found to be well within the acceptance value for the RFQ. These measured emittance parameters are used to optimize the solenoid fields in LEBT to match the beam from the ion source to RFQ. TRACEWIN simulation code is used for the beam transport simulations. The simulations show 99% transmission of D(+) beam through the RFQ, while 95% transmission has been measured experimentally. PMID:26233371

  10. Robotics Methods for Beam Line Instrument Simulation and Control

    International Nuclear Information System (INIS)

    The majority of sample positioning systems in use at neutron and synchrotron beam line facilities around the world, may be accurately described as serial robot manipulators, i.e. they comprise a series of rotating or translating links connected together in a chain, with the tool or sample that is to be manipulated attached to one end. This characterization suggests that the methods of serial robot kinematic modeling might be usefully applied to the task of simulating and controlling beam line positioning systems. We describe how this approach is being developed within the planning, simulation and control software, SScanSS. The advantages of using the robotics approach are shown to include the ability to: (1) model any number of disparate positioning systems from within one software (and hence one user interface), with a minimum of instrument specific code, (2) accurately and speedily position and orientate samples of arbitrary complexity, and (3) provide options for automatically optimizing other important experimental parameters, such as the measurement count time. The possible extension of this technique to include parallel robotic systems, such as Stewart Platforms, is also discussed

  11. Computational design of an automotive twist beam

    Directory of Open Access Journals (Sweden)

    Benki Aalae

    2016-07-01

    Full Text Available In recent years, the automotive industry has known a remarkable development in order to satisfy the customer requirements. In this paper, we will study one of the components of the automotive which is the twist beam. The study is focused on the multicriteria design of the automotive twist beam undergoing linear elastic deformation (Hooke׳s law. Indeed, for the design of this automotive part, there are some criteria to be considered as the rigidity (stiffness and the resistance to fatigue. Those two criteria are known to be conflicting, therefore, our aim is to identify the Pareto front of this problem. To do this, we used a Normal Boundary Intersection (NBI algorithm coupling with a radial basis function (RBF metamodel in order to reduce the high calculation time needed for solving the multicriteria design problem. Otherwise, we used the free form deformation (FFD technique for the generation of the 3D shapes of the automotive part studied during the optimization process.

  12. Beam-Based Alignment, Tuning and Beam Dynamics Studies for the ATF2 Extraction Line and Final Focus System

    International Nuclear Information System (INIS)

    Using a new extraction line currently under construction, the ATF2 experiment plans to test the novel compact final focus optics design with local chromaticity correction intended for use in future linear colliders. With a 1.3 GeV design beam of 30nm normalized vertical emittance extracted from the ATF damping ring, the primary goal is to achieve a vertical spot-size at the IP waist of 37nm. We discuss our planned strategy for tuning the ATF2 beam to meet the primary goal. Simulation studies have been performed to asses the effectiveness of the strategy, including 'static' (installation) errors and dynamical effects (ground-motion, mechanical vibration, ring extraction jitter etc.). We have simulated all steps in the tuning procedure, from initial orbit establishment to final IP spot-size tuning. Through a Monte Carlo study of 100's of simulation seeds we find we can achieve a spot-size within ∼10% of the design optics value in at least 75% of cases. We also ran a simulation to study the long-term performance with the use of beam-based feedbacks

  13. Muon Beam Helical Cooling Channel Design

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, Rolland; Ankenbrandt, Charles; Flanagan, G; Kazakevich, G M; Marhauser, Frank; Neubauer, Michael; Roberts, T; Yoshikawa, C; Derbenev, Yaroslav; Morozov, Vasiliy; Kashikhin, V S; Lopes, Mattlock; Tollestrup, A; Yonehara, Katsuya; Zloblin, A

    2013-06-01

    The Helical Cooling Channel (HCC) achieves effective ionization cooling of the six-dimensional (6d) phase space of a muon beam by means of a series of 21st century inventions. In the HCC, hydrogen-pressurized RF cavities enable high RF gradients in strong external magnetic fields. The theory of the HCC, which requires a magnetic field with solenoid, helical dipole, and helical quadrupole components, demonstrates that dispersion in the gaseous hydrogen energy absorber provides effective emittance exchange to enable longitudinal ionization cooling. The 10-year development of a practical implementation of a muon-beam cooling device has involved a series of technical innovations and experiments that imply that an HCC of less than 300 m length can cool the 6d emittance of a muon beam by six orders of magnitude. We describe the design and construction plans for a prototype HCC module based on oxygen-doped hydrogen-pressurized RF cavities that are loaded with dielectric, fed by magnetrons, and operate in a superconducting helical solenoid magnet.

  14. Results from the HiRadMat Primary Beam Line Commissioning

    CERN Document Server

    Hessler, C; Bauche, J; Bestmann, K; Blanco Sancho, J; Conan, N; Cornelis, K; Efthymiopoulos, I; Gaillard, H; Goddard, B; Grenier, D; Gros, G; Habert, A; Jensen, L; Kain, V; Le Godec, G; Meddahi, M; Pelletier, S; Pepinster, P; Puccio, B; Theis, C; Trilhe, P; Vandoni, G; Wenninger, J

    2011-01-01

    The High Radiation to Materials facility (HiRadMat) is a new experimental area at CERN, for studies of the impact of high-intensity pulsed beams on accelerator components and materials. The beam is delivered from the SPS by a new primary beam line, which has been constructed during the 2010/11 winter technical stop. The paper summarizes the construction phase and describes the results from the beam line commissioning in spring 2011. Beam parameter and aperture measurements are presented, as well as steering tests. A special emphasis has been put on the handling of the exceptionally flexible beam line optics in the control system.

  15. Laser processing with specially designed laser beam

    Science.gov (United States)

    Asratyan, A. A.; Bulychev, N. A.; Feofanov, I. N.; Kazaryan, M. A.; Krasovskii, V. I.; Lyabin, N. A.; Pogosyan, L. A.; Sachkov, V. I.; Zakharyan, R. A.

    2016-04-01

    The possibility of using laser systems to form beams with special spatial configurations has been studied. The laser systems applied had a self-conjugate cavity based on the elements of copper vapor lasers (LT-5Cu, LT-10Cu, LT-30Cu) with an average power of 5, 10, or 30 W. The active elements were pumped by current pulses of duration 80-100 ns. The duration of laser generation pulses was up to 25 ns. The generator unit included an unstable cavity, where one reflector was a special mirror with a reflecting coating. Various original optical schemes used were capable of exploring spatial configurations and energy characteristics of output laser beams in their interaction with micro- and nanoparticles fabricated from various materials. In these experiments, the beam dimensions of the obtained zones varied from 0.3 to 5 µm, which is comparable with the minimum permissible dimensions determined by the optical elements applied. This method is useful in transforming a large amount of information at the laser pulse repetition rate of 10-30 kHz. It was possible to realize the high-precision micromachining and microfabrication of microscale details by direct writing, cutting and drilling (with the cutting width and through-hole diameters ranging from 3 to 100 µm) and produce microscale, deep, intricate and narrow grooves on substrate surfaces of metals and nonmetal materials. This system is used for producing high-quality microscale details without moving the object under treatment. It can also be used for microcutting and microdrilling in a variety of metals such as molybdenum, copper and stainless steel, with a thickness of up to 300 µm, and in nonmetals such as silicon, sapphire and diamond with a thickness ranging from 10 µm to 1 mm with different thermal parameters and specially designed laser beam.

  16. Beam-powered lunar rover design

    Energy Technology Data Exchange (ETDEWEB)

    Dagle, J.E.; Coomes, E.P.; Antoniak, Z.I.; Bamberger, J.A.; Bates, J.M.; Chiu, M.A.; Dodge, R.E.; Wise, J.A.

    1992-03-01

    Manned exploration of our nearest neighbors in the solar systems is the primary goal of the Space Exploration Initiative (SEI). An integral part of any manned lunar or planetary outpost will be a system for manned excursions over the surface of the planet. This report presents a preliminary design for a lunar rover capable of supporting four astronauts on long-duration excursions across the lunar landscape. The distinguishing feature of this rover design is that power is provided to rover via a laser beam from an independent orbiting power satellite. This system design provides very high power availability with minimal mass on the rover vehicle. With this abundance of power, and with a relatively small power-system mass contained in the rover, the vehicle can perform an impressive suite of mission-related activity. The rover might be used as the first outpost for the lunar surface (i.e., a mobile base). A mobile base has the advantage of providing extensive mission activities without the expense of establishing a fixed base. This concept has been referred to as Rove First.'' A manned over, powered through a laser beam, has been designed for travel on the lunar surface for round-trip distances in the range of 1000 km, although the actual distance traveled is not crucial since the propulsion system does not rely on energy storage. The life support system can support a 4-person crew for up to 30 days, and ample power is available for mission-related activities. The 8000-kg rover has 30 kW of continuous power available via a laser transmitter located at the Earth-moon L1 libration point, about 50,000 km above the surface of the moon. This rover, which is designed to operate in either day or night conditions, has the flexibility to perform a variety of power-intensive missions. 24 refs.

  17. Beam-powered lunar rover design

    Energy Technology Data Exchange (ETDEWEB)

    Dagle, J.E.; Coomes, E.P.; Antoniak, Z.I.; Bamberger, J.A.; Bates, J.M.; Chiu, M.A.; Dodge, R.E.; Wise, J.A.

    1992-03-01

    Manned exploration of our nearest neighbors in the solar systems is the primary goal of the Space Exploration Initiative (SEI). An integral part of any manned lunar or planetary outpost will be a system for manned excursions over the surface of the planet. This report presents a preliminary design for a lunar rover capable of supporting four astronauts on long-duration excursions across the lunar landscape. The distinguishing feature of this rover design is that power is provided to rover via a laser beam from an independent orbiting power satellite. This system design provides very high power availability with minimal mass on the rover vehicle. With this abundance of power, and with a relatively small power-system mass contained in the rover, the vehicle can perform an impressive suite of mission-related activity. The rover might be used as the first outpost for the lunar surface (i.e., a mobile base). A mobile base has the advantage of providing extensive mission activities without the expense of establishing a fixed base. This concept has been referred to as ``Rove First.`` A manned over, powered through a laser beam, has been designed for travel on the lunar surface for round-trip distances in the range of 1000 km, although the actual distance traveled is not crucial since the propulsion system does not rely on energy storage. The life support system can support a 4-person crew for up to 30 days, and ample power is available for mission-related activities. The 8000-kg rover has 30 kW of continuous power available via a laser transmitter located at the Earth-moon L1 libration point, about 50,000 km above the surface of the moon. This rover, which is designed to operate in either day or night conditions, has the flexibility to perform a variety of power-intensive missions. 24 refs.

  18. The charge breeder beam line for the selective production of exotic species project at INFN-Legnaro National Laboratories

    Science.gov (United States)

    Galatà, A.; Comunian, M.; Maggiore, M.; Manzolaro, M.; Angot, J.; Lamy, T.

    2014-02-01

    SPES (Selective Production of Exotic Species) is an INFN (Istituto Nazionale di Fisica Nucleare) project with the aim at producing and post-accelerating exotic beams to perform forefront research in nuclear physics. To allow post-acceleration of the radioactive ions, an ECR-based Charge Breeder (CB) developed on the basis of the Phoenix booster was chosen. The design of the complete beam line for the SPES-CB will be described: a system for stable 1+ beams production was included; special attention was paid to the medium resolution mass spectrometer after the CB to limit possible superposition of the exotic beams with the impurities present in the ECR plasma.

  19. Operating instructions for ORELA [Oak Ridge Electron Linear Accelerator] positron beam line

    International Nuclear Information System (INIS)

    This report will contain details of the construction and operation of the positron beam line. Special procedures which are performed on a less frequent basis will also be described. Appendices will contain operating instructions for experiments which make use of the positron beam and are connected to the beam line. Finally, a review of safety-related considerations will be presented

  20. Construction of Superconducting Magnet System for the J-PARC Neutrino Beam Line

    Energy Technology Data Exchange (ETDEWEB)

    Nakamoto, T.; Wanderer, P.; Sasaki, K.; Ajima, Y.; Araoka, O.; Fujii, Y.; Hastings, N.; Higashi, N.; Iida, M.; Ishii, T.; Kimura, N.; Kobayashi, T.; Makida, Y.; Nakadaira, T.; Ogitsu, T.; Ohhata, H.; Okamura, T.; Sakashita, K.; Sugawara, S.; Suzuki, S.; Tanaka, K.; Tomaru, T.; Terashima, A.; Yamamoto, A.; Ichikawa, A.; Kakuno, H.; Anerella, M.; Escallier, J.; Ganetis, G.; gupta, R.; Jain, A.; Muratore, J.; Parker, B.; Boussuge, T.; Charrier, J.-P.; Arakawa, M.; Ichihara, T.; Minato, T.; Okada, Y.; Itou, A.; Kumaki, T.; Nagami, M.; Takahashi, T.

    2009-10-18

    Following success of a prototype R&D, construction of a superconducting magnet system for J-PARC neutrino beam line has been carried out since 2005. A new conceptual beam line with the superconducting combined function magnets demonstrated the successful beam transport to the neutrino production target.

  1. New Pulsed Cold Neutron Beam Line for Fundamental Nuclear Physics at LANSCE

    Science.gov (United States)

    Seo, P.-N.; Bowman, J. D.; Gericke, M.; Gillis, R. C.; Greene, G. L.; Leuschner, M. B.; Long, J.; Mahurin, R.; Mitchell, G. S.; Penttila, S. I.; Peralta, G.; Sharapov, E. I.; Wilburn, W. S.

    2005-01-01

    The NPDGamma collaboration has completed the construction of a pulsed cold neutron beam line on flight path12 at the Los Alamos Neutron Science Center (LANSCE). We describe the new beam line and characteristics of the beam. We report results of the moderator brightness and the guide performance measurements. FP12 has the highest pulsed cold neutron intensity for nuclear physics in the world.

  2. KTeV beam systems design report

    Energy Technology Data Exchange (ETDEWEB)

    Bocean, V.; Childress, S.; Coleman, R. [and others

    1997-09-01

    The primary and secondary beams for the KTeV experiments E799-II and E832 are discussed. The specifications are presented and justified. The technical details of the implementation of the primary beam transport and stability are detailed. The target, beam dump, and radiation safety issues are discussed. The details of the collimation system for the pair of secondary beams are presented.

  3. KTeV beam systems design report

    International Nuclear Information System (INIS)

    The primary and secondary beams for the KTeV experiments E799-II and E832 are discussed. The specifications are presented and justified. The technical details of the implementation of the primary beam transport and stability are detailed. The target, beam dump, and radiation safety issues are discussed. The details of the collimation system for the pair of secondary beams are presented

  4. Design and Optimization of Low Energy Beam Transport for TAC Proton Facility

    CERN Document Server

    Kisoglu, H F; Sultansoy, S; Yilmaz, M

    2014-01-01

    In this study, a low energy beam transport (LEBT) channel for the proton linac section of the Turkish Accelerator Center (TAC) has been designed by using TRAVEL code. Commonly used LEBT including two focusing solenoid magnets will transport and match the H- beam from a volume source to RFQ. In the beam dynamics simulations of such a LEBT line, 95% space-charge compensation (SCC) has been considered in this study. We aimed to find out the determination of our RFQ parameters that gives the best possible beam quality using beam collimator as an alternative way. In this way, we have acquired the best possible beam quality on RFQ input plane as well as optimizing the LEBT line.

  5. Design of typical glued laminated timber beams

    OpenAIRE

    Domadenik, Žiga

    2015-01-01

    In this graduation thesis, I developed a computer program with the help of Excel's built-in developer. I used the programming language Visual Basics (VBA). The program allows dimensioning of typical laminated timber beams covered by Eurocode 5: Single tapered beam, double tapered beam, curved beam and pitched cambered beam. The program uses simplified expressions of Eurocode 5. The first part of the thesis describes expressions used for dimensioning, the second part describes the ...

  6. Laser beam riding artillery missiles guidance device is designed

    Science.gov (United States)

    Yan, Mingliang; Huo, Zhicheng; Chen, Wei

    2014-09-01

    Laser driving gun missile guidance type beam of laser information field formed by any link failure or reduced stability will directly lead to ballistic or miss out of control, and based on this, this paper designed the driving beam of laser guided missile guidance beam type forming device modulation and zoom mechanism, in order to make the missile can recognize its position in the laser beam, laser beam gun missile, by means of spatial encoding of the laser beam laser beam into information after forming device, a surface to achieve the purpose of precision guidance.

  7. Helical muon beam cooling channel engineering design

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, Rolland [Muons, Inc., Batavia, IL (United States)

    2015-08-07

    The Helical Cooling Channel (HCC) achieves effective ionization cooling of the six-dimensional (6d) phase space of a muon beam by means of a series of 21st century inventions. In the HCC, hydrogen-pressurized RF cavities enable high RF gradients in strong external magnetic fields. The theory of the HCC, which requires a magnetic field with solenoid, helical dipole, and helical quadrupole components, demonstrates that dispersion in the gaseous hydrogen energy absorber provides effective emittance exchange to enable longitudinal ionization cooling. The 10-year development of a practical implementation of a muon-beam cooling device has involved a series of technical innovations and experiments that imply that an HCC of less than 300 m length can cool the 6d emittance of a muon beam by six orders of magnitude. We describe the design and construction plans for a prototype HCC module based on oxygen-doped hydrogen-pressurized RF cavities that are loaded with dielectric, fed by magnetrons, and operate in a superconducting helical solenoid magnet. The first phase of this project saw the development of a conceptual design for the integration of 805 MHz RF cavities into a 10 T Nb3Sn based HS test section. Two very novel ideas are required to realize the design. The first idea is the use of dielectric inserts in the RF cavities to make them smaller for a given frequency so that the cavities and associated plumbing easily fit inside the magnet cryostat. Calculations indicate that heat loads will be tolerable, while RF breakdown of the dielectric inserts will be suppressed by the pressurized hydrogen gas. The second new idea is the use of a multi-layer Nb3Sn helical solenoid. The technology demonstrations for the two aforementioned key components of a 10T, 805 MHz HCC were begun in this project. The work load in the Fermilab Technical Division made it difficult to test a multi-layer Nb3Sn solenoid as originally planned. Instead, a complementary project was approved by the DOE

  8. New magnet transport system for the LHC beam transfer lines

    CERN Document Server

    Patrice Loïez

    2003-01-01

    The first of 700 magnets has been installed in one of the two transfer tunnels built to transfer the SPS beam into the LHC. The start of this first installation phase of the LHC transfer lines provides the opportunity to launch a new and highly original modular system for transporting and installing all kinds of magnets in very narrow tunnels. The system (pictured here in one of the tunnels) is based on very compact bogies, up to four of which can be coupled together to form a convoy. The wheels are fitted with individual motors enabling them to swivel through an angle of 90° and the convoy to move laterally. The lead vehicle is powered by an electric rail set into the roof of the tunnel. The system is backed up by electrical batteries that enable it to operate in the absence of an outside power source or in the event of power failure. Last but not least, for the long-distance transport of magnets, it can be optically guided by a line traced on the tunnel floor. The convoy moves through the particularly narr...

  9. Insertion device and beam line plans for the advanced photon source

    International Nuclear Information System (INIS)

    In the 7-GeV Advanced Photon Source (APS) Conceptual Design Report (CDR), fifteen complete experimental beam lines were specified in order to establish a representative technical and cost base for the components involved. In order to optimize the composition of the insertion devices and the beam line, these funds are considered a open-quote Trust Fund.close quotes The present report evaluates the optimization for the distribution of these funds so that the short- and long-term research programs will be most productive, making the facility more attractive from the user's point of view. It is recommended that part of the open-quote Trust Fundclose quotes be used for the construction of the insertion devices, the front-end components, and the first-optics, minimizing the cost to potential users of completing a beam line. In addition, the possibility of cost savings resulting from replication and standardization of high multiplicity components (such as IDs, front ends, and first-optics instrumentation) is addressed

  10. Experimental evaluation of the radiological condition of HRVUV beam line of Indus-1 SRS at RRCAT

    International Nuclear Information System (INIS)

    Indus Accelerator Complex comprises of two Synchrotron Radiation Sources (SRS) namely Indus-1 and Indus-2 with maximum electron beam energy being 450 MeV and 2.5 GeV respectively. Presently there are 5 operational beam lines in Indus-1 and High Resolution Vacuum Ultra Violet (HRVUV) beam line is one among them. This beam line is especially significant from radiation safety point of view due to its position. HRVUV beam line area gets significant radiation field due to beam losses in Indus-1 injection septum, Transport lines 2 and 3 (TL2/TL3) and losses in TL3 in TL3 Tunnel. Due to this reason, entry in HRVUV beam line area was prohibited during various modes of machine operation. So an attempt was made to study the dose rates in this beam line area during various modes of machine operations including worst case scenarios. Subsequent to the study, shielding augmentation/modification to reduce the radiation levels in this area was carried out. (a) A sliding shield door of lead bricks was put at MS Grill Door to stop radiation streaming from TL3 Tunnel side. (b) Shielding augmentation was done at TL2 near SIP 5, (c) at TL3 beam shutter and (d) TL3 Beam Profile Monitor-1 (BPM1). (e) Beam physicist succeeded in reducing beam losses at TL2 by changing kicker delay timings by 9 nano seconds. All these efforts have resulted in significant reduction in radiation field in HRVUV beam line area. Based on the study of radiation levels and the subsequent shielding augmentation, this area is now made accessible during Indus-1 storage as well as during Indus-2 Injection with entry restrictions applicable based on prevailing radiological conditions. This paper presents the study of radiation levels in HRVUV beam line area and the corrective actions taken on the basis of the study. (author)

  11. Holographic Fabrication of Designed Functional Defect Lines in Photonic Crystal Lattice Using a Spatial Light Modulator

    Directory of Open Access Journals (Sweden)

    Jeffrey Lutkenhaus

    2016-04-01

    Full Text Available We report the holographic fabrication of designed defect lines in photonic crystal lattices through phase engineering using a spatial light modulator (SLM. The diffracted beams from the SLM not only carry the defect’s content but also the defect related phase-shifting information. The phase-shifting induced lattice shifting in photonic lattices around the defects in three-beam interference is less than the one produced by five-beam interference due to the alternating shifting in lattice in three beam interference. By designing the defect line at a 45 degree orientation and using three-beam interference, the defect orientation can be aligned with the background photonic lattice, and the shifting is only in one side of the defect line, in agreement with the theory. Finally, a new design for the integration of functional defect lines in a background phase pattern reduces the relative phase shift of the defect and utilizes the different diffraction efficiency between the defect line and background phase pattern. We demonstrate that the desired and functional defect lattice can be registered into the background lattice through the direct imaging of designed phase patterns.

  12. Mechanical Design of a High Energy Beam Absorber for the Advanced Superconducting Test Accelerator (ASTA) at Fermilab

    CERN Document Server

    Baffes, C; Leibfritz, J; Oplt, S; Rakhno, I

    2013-01-01

    A high energy beam absorber has been built for the Advanced Superconducting Test Accelerator (ASTA) at Fermilab. In the facility's initial configuration, an electron beam will be accelerated through 3 TTF-type or ILC-type RF cryomodules to an energy of 750MeV. The electron beam will be directed to one of multiple downstream experimental and diagnostic beam lines and then deposited in one of two beam absorbers. The facility is designed to accommodate up to 6 cryomodules, which would produce a 75kW beam at 1.5GeV; this is the driving design condition for the beam absorbers. The beam absorbers consist of water-cooled graphite, aluminum and copper layers contained in a Helium-filled enclosure. This paper describes the mechanical implementation of the beam absorbers, with a focus on thermal design and analysis. In addition, the potential for radiation-induced degradation of the graphite is discussed.

  13. Mechanical Design of a High Energy Beam Absorber for the Advanced Superconducting Test Accelerator (ASTA) at Fermilab

    Energy Technology Data Exchange (ETDEWEB)

    Baffes, C.; Church, M.; Leibfritz, J.; Oplt, S.; Rakhno, I.; /Fermilab

    2012-05-10

    A high energy beam absorber has been built for the Advanced Superconducting Test Accelerator (ASTA) at Fermilab. In the facility's initial configuration, an electron beam will be accelerated through 3 TTF-type or ILC-type SRF cryomodules to an energy of 750MeV. The electron beam will be directed to one of multiple downstream experimental and diagnostic beam lines and then deposited in one of two beam absorbers. The facility is designed to accommodate up to 6 cryomodules, which would produce a 75kW beam at 1.5GeV; this is the driving design condition for the beam absorbers. The beam absorbers consist of water-cooled graphite, aluminum and copper layers contained in a helium-filled enclosure. This paper describes the mechanical implementation of the beam absorbers, with a focus on thermal design and analysis. The potential for radiation-induced degradation of the graphite is discussed.

  14. Evaluation of ozone concentration for a white beam line hutch at Indus-2 synchrotron radiation source

    International Nuclear Information System (INIS)

    In the synchrotron radiation source Indus-2, 26 synchrotron radiation beam lines are planned, out of which 7 beam lines are operational and several are in installation stage. For carrying out experiments, SR beam is brought out to air through the beam lines (which are housed in shielded hutches). Due to the interaction of SR with air, ozone is produced, which is a noxious gas and is hazardous, if inhaled in excess. The production of ozone is high in white beam lines in comparison with pink and monochromatic beam lines. In the present paper ozone generation for a white beam line of Indus-2 is estimated. The ozone production rate, saturation concentration, ventilation rate and delay time are also estimated. The saturation concentration of ozone for the white beam line (energy dispersive X-ray diffraction beam line) BL-11 was found to be 0.965 ppm for 100 cm interaction path length and 51.45 m3 hutch volume without any ventilation. The paper presents the details of the calculation and the results. (author)

  15. [Design of Dual-Beam Spectrometer in Spectrophotometer for Colorimetry].

    Science.gov (United States)

    Liu, Yi-xuan; Yan, Chang-xiang

    2015-07-01

    Spectrophotometers for colorimetry are usually composed of two independent and identical spectrometers. In order to reduce the volume of spectrophotometer for colorimetry, a design method of double-beam spectrometer is put forward. A traditional spectrometer is modified so that a new spectrometer can realize the function of double spectrometers, which is especially suitable for portable instruments. One slit is replaced by the double-slit, than two beams of spectrum can be detected. The working principle and design requirement of double-beam spectrometer are described. A spectrometer of portable spectrophotometer is designed by this method. A toroidal imaging mirror is used for the Czerny-Turner double-beam spectrometer in this paper, which can better correct astigmatism, and prevent the dual-beam spectral crosstalk. The results demonstrate that the double-beam spectrometer designed by this method meets the design specifications, with the spectral resolution less than 10 nm, the spectral length of 9.12 mm, and the volume of 57 mm x 54 mm x 23 mm, and without the dual-beam spectral overlap in the detector either. Comparing with a traditional spectrophotometer, the modified spectrophotometer uses a set of double-beam spectrometer instead of two sets of spectrometers, which can greatly reduce the volume. This design method can be specially applied in portable spectrophotometers, also can be widely applied in other double-beam spectrophotometers, which offers a new idea for the design of dual-beam spectrophotometers. PMID:26717779

  16. Design of the digitizing beam position limit detector

    International Nuclear Information System (INIS)

    The Digitizing Beam Position Limit Detector (DBPLD) is designed to identify and react to beam missteering conditions in the Advanced Photon Source (APS) storage ring. The high power of the insertion devices requires these missteering conditions to result in a beam abort in less than 2 milliseconds. Commercially available beam position monitors provide a voltage proportional to beam position immediately upstream and downstream of insertion devices. The DBPLD is a custom VME board that digitizes these voltages and interrupts the heartbeat of the APS machine protection system when the beam position exceeds its trip limits

  17. Active and passive beam application design guide for global application

    CERN Document Server

    Rimmer, Julian

    2015-01-01

    The Active and Passive Beam Application Design Guide is the result of collaboration by worldwide experts to give system designers a current, authoritative guide on successfully applying active and passive beam technology. Active and Passive Beam Application Design Guide provide energy-efficient methods of cooling, heating, and ventilating indoor areas, especially spaces that require individual zone control and where internal moisture loads are moderate. The systems are simple to operate, with low maintenance requirements. This book is an essential resource for consulting engineers, architects, owners, and contractors who are involved in the design, operation, and installation of these systems. Building on REHVA’s Chilled Beam Application Guidebook, this new guide provides up-to-date tools and advice for designing, commissioning, and operating chilled-beam systems to achieve a determined indoor climate, and includes examples of active and passive beam calculations and selections. Dual units (SI and I-P) are...

  18. Design Considerations for the PS2 Beam Dumps

    CERN Document Server

    Kramer, T; Goddard, B; Vincke, H

    2008-01-01

    The different beam dump functionalities required for the proposed PS2 machine and its transfer lines are briefly described, followed by first estimates about the expected beam loads. This data has been taken as input for comparing the different technical options for the dump systems, in particular to simulate the radiological impact for internal or external beam dump options. The numbers derived have been used to help decide which of the feasible technical alternatives are preferred.

  19. Structural design of beam transport system in SGIII facility target area

    International Nuclear Information System (INIS)

    Graphical abstract: - Highlights: • SGIII target area beam transport system claims stability, accuracy and cleanliness. • Vibrational stability of mirrors and laser beams is mainly analyzed. • The accuracy relies on adjustable kinematic mounts and low-stress clamping. • The cleanliness is established in structural design, fabrication and operation. - Abstract: Beam transport system in ShenGuangIII (SGIII) facility target area brings 48 laser beams from main laser output to final optics assemblies (FOAs). This paper will present a summary of structural design of SGIII target area beam transport system, which include 276 transport mirrors and nearly 3000 m beam enclosures. The key performance of the beam transport system structural design includes stability, accuracy and cleanliness. To ensure the vibrational stability requirement, the beam transport system is located on stable platforms comprised of switchyard steel space frame and experimental area steel reinforced concrete building. The high fundamental frequency of the transport mirror system and vibrational isolation from thin tubes are designed to decrease the vibration response of the mirrors. An analytical method is proposed to evaluate the structural design on the drifting error of each laser beam obtained by accounting the dynamic responses of each optical elements of laser beam. The adjusting and fast replacement online requirements are satisfied by the structural design of line replaceable units (LRUs), the adjustable kinematic mounts, and the low-stress clamping of mirror mounts. The cleanliness is established in the process of designing, fabrication, and operation simultaneously. Testing results of the beam transport system that has been installed indicate that the structural design satisfies the performance requirements of the facility

  20. TRANSPORT: a computer program for designing charged particle beam transport systems

    International Nuclear Information System (INIS)

    TRANSPORT is a first- and second-order matrix multiplication computer program intended for the design of static-magnetic beam transport systems. It has been in existence in various evolutionary versions since 1963. The present version, described in the manual given, includes both first- and second-order fitting capabilities. TRANSPORT will step through the beam line, element by element, calculating the properties of the beam or other quantities, described below, where requested. Therefore one of the first elements is a specification of the phase space region occupied by the beam entering the system. Magnets and intervening spaces and other elements then follow in the sequence in which they occur in the beam line. Specifications of calculations to be done or of configurations other than normal are placed in the same sequence, at the point where their effect is to be made

  1. TRANSPORT: a computer program for designing charged particle beam transport systems

    Energy Technology Data Exchange (ETDEWEB)

    Brown, K.L.; Rothacker, F.; Carey, D.C.; Iselin, C.

    1977-05-01

    TRANSPORT is a first- and second-order matrix multiplication computer program intended for the design of static-magnetic beam transport systems. It has been in existence in various evolutionary versions since 1963. The present version, described in the manual given, includes both first- and second-order fitting capabilities. TRANSPORT will step through the beam line, element by element, calculating the properties of the beam or other quantities, described below, where requested. Therefore one of the first elements is a specification of the phase space region occupied by the beam entering the system. Magnets and intervening spaces and other elements then follow in the sequence in which they occur in the beam line. Specifications of calculations to be done or of configurations other than normal are placed in the same sequence, at the point where their effect is to be made.

  2. An after-market, five-port vertical beam line extension for the PETtrace

    DEFF Research Database (Denmark)

    Barnhart, T. E.; Engle, J. W.; Severin, Gregory;

    2012-01-01

    Most commercial cyclotrons intended for medical isotope production provide a limited number of beam ports crowded into a minimal vault space. Taking advantage of our new lab construction, we planned and installed a beam-line on port ♯2 of our GEMS PETtrace to bring beam to an additional 5 target...

  3. High resolution line for secondary radioactive beams at the U400M cyclotron

    International Nuclear Information System (INIS)

    For implementation of an experimental program for studying nuclear reactions with radioactive ion beams in the energy domain of 20 through 80 MeV · A the high resolution beam line ACCULINNA was put into commissioning on a primary beam line of the JINR U-400M cyclotron. By means of nuclear fragmentation of the 14N beam with the energy of 51 MeV · A on the 170 mg/cm2 carbon target radioactive beams of 6He, 8He and 8B were obtained. Possibilities of further development of the set-up are discussed. 6 refs., 7 figs., 2 tabs

  4. On-line neutron beam monitoring of the Finnish BNCT facility

    International Nuclear Information System (INIS)

    A Boron Neutron Capture Therapy (BNCT) facility has been built at the FiR 1 research reactor of VTT Chemical Technology in Espoo, Finland. The facility is currently undergoing dosimetry characterisation and neutron beam operation research for clinical trials. The healthy tissue tolerance study, which was carried out in the new facility during spring 1998, demonstrated the reliability and user-friendliness of the new on-line beam monitoring system designed and constructed for BNCT by VTT Chemical Technology. The epithermal neutron beam is monitored at a bismuth gamma shield after an aluminiumfluoride-aluminium moderator. The detectors are three pulse mode U235-fission chambers for epithermal neutron fluence rate and one current mode ionisation chamber for gamma dose rate. By using different detector sensitivities the beam intensity can be measured over a wide range of reactor power levels (0.001-250 kW). The detector signals are monitored on-line with a virtual instrumentation (LabView) based PC-program, which records and displays the actual count rates and total counts of the detectors in the beam. Also reactor in-core power instrumentation and control rod positions can be monitored via another LabView application. The main purpose of the monitoring system is to provide a dosimetric link to the dose in a patient during the treatment, as the fission chamber count rates have been calibrated to the induced thermal neutron fluence rate and to the absorbed dose rate at reference conditions in a tissue substitute phantom

  5. On-line neutron beam monitoring of the Finnish BNCT facility

    Science.gov (United States)

    Tanner, Vesa; Auterinen, Iiro; Helin, Jori; Kosunen, Antti; Savolainen, Sauli

    1999-02-01

    A Boron Neutron Capture Therapy (BNCT) facility has been built at the FiR 1 research reactor of VTT Chemical Technology in Espoo, Finland. The facility is currently undergoing dosimetry characterisation and neutron beam operation research for clinical trials. The healthy tissue tolerance study, which was carried out in the new facility during spring 1998, demonstrated the reliability and user-friendliness of the new on-line beam monitoring system designed and constructed for BNCT by VTT Chemical Technology. The epithermal neutron beam is monitored at a bismuth gamma shield after an aluminiumfluoride-aluminium moderator. The detectors are three pulse mode U 235-fission chambers for epithermal neutron fluence rate and one current mode ionisation chamber for gamma dose rate. By using different detector sensitivities the beam intensity can be measured over a wide range of reactor power levels (0.001-250 kW). The detector signals are monitored on-line with a virtual instrumentation (LabView) based PC-program, which records and displays the actual count rates and total counts of the detectors in the beam. Also reactor in-core power instrumentation and control rod positions can be monitored via another LabView application. The main purpose of the monitoring system is to provide a dosimetric link to the dose in a patient during the treatment, as the fission chamber count rates have been calibrated to the induced thermal neutron fluence rate and to the absorbed dose rate at reference conditions in a tissue substitute phantom.

  6. Orbit Error Correction on the High Energy Beam Transport Line at the KHIMA Accelerator System

    CERN Document Server

    Park, Chawon; Hahn, Garam; An, Dong Hyun

    2016-01-01

    For the purpose of treatment of various cancer and medical research, the synchrotron based medical machine under the Korea Heavy Ion Medical Accelerator (KHIMA) project have been conducted and is going to treat the patient at the beginning of 2018. The KHIMA synchrotron is designed to accelerate and extract the carbon ion (proton) beam with various energy range, 110 up to 430 MeV/u (60 up to 230 MeV). A lattice design and beam optics studies for the High Energy Beam Transport (HEBT) line at the KHIMA accelerator system have been carried out with WinAgile and the MAD-X codes. Because the magnetic eld errors and the mis-alignments introduce to the deviations from the design parameters, these error sources should be treated explicitly and the sensitivity of the machine's lattice to di erent individual error sources is considered. Various types of errors which are static and dynamic one have been taken into account and have been consequentially corrected with a dedicated correction algorithm by using the MAD-X pr...

  7. Application of magnetically insulated transmission lines for high current, high voltage electron beam accelerators

    International Nuclear Information System (INIS)

    Self Magnetically Insulated Transmission Lines (MITL) adders have been used successfully in a number of Sandia accelerators such as HELIA, HERMES III, and SABRE. Most recently the authors used a MITL adder in the RADLAC/SMILE electron beam accelerator to produce high quality, small radius (rb < 2 cm), 11 to 15 MeV, 50 to 100-kA beams with a small transverse velocity v perpendicular/c = β perpendicular ≤ 0.1. In RADLAC/SMILE, a coaxial MITL passed through the eight, 2 MV vacuum envelopes. The MITL summed the voltages of all eight feeds to a single foilless diode. The experimental results are in good agreement with code simulations. The authors' success with the MITL technology led them to investigate the application to higher energy accelerator designs. They have a conceptual design for a cavity-fed MITL that sums the voltages from 100 identical, inductively-isolated cavities. Each cavity is a toroidal structure that is driven simultaneously by four 8-ohm pulse-forming lines, providing a 1-MV voltage pulse to each of the 100 cavities. The point design accelerator is 100 MV, 500 kA, with a 30-50-ns FWHM output pulse

  8. Application of Magnetically Insulated Transmission Lines for high current, high voltage electron beam accelerators

    International Nuclear Information System (INIS)

    Self Magnetically Insulated Transmission Lines (MITL) adders have been used successfully in a number of Sandia accelerators such as HELIA, HERMES III, and SABRE. Most recently we used at MITL adder in the RADLAC/SMILE electron beam accelerator to produce high quality, small radius (rρ < 2 cm), 11 to 15 MeV, 50 to 100-kA beams with a small transverse velocity v perpendicular/c = β perpendicular ≤ 0.1. In RADLAC/SMILE, a coaxial MITL passed through the eight, 2 MV vacuum envelopes. The MITL summed the voltages of all eight feeds to a single foilless diode. The experimental results are in good agreement with code simulations. Our success with the MITL technology led us to investigate the application to higher energy accelerator designs. We have a conceptual design for a cavity-fed MITL that sums the voltages from 100 identical, inductively-isolated cavities. Each cavity is a toroidal structure that is driven simultaneously by four 8-ohm pulse-forming lines, providing a 1-MV voltage pulse to each of the 100 cavities. The point design accelerator is 100 MV, 500 kA, with a 30--50 ns FWHM output pulse. 10 refs

  9. RESIDUAL GAS IONIZATION BEAM PROFILE MONITOR ON 40MeV H— BEAM TRANSPORT LINE

    Institute of Scientific and Technical Information of China (English)

    徐伟鹏; E.Takasaki

    1995-01-01

    The monitor is composed of a pair of electrodes,a single stage of microchannel plate,a phosphor screen,a CCD camera and a PC computer,To obtain a good uniform collecting field,forming electrodes system is used instead of that with a resistive divider,The readout system is performed by the phosphor screen and the CCD camera because the spatial resolution is not limited by the mechanical structure like the anode strip type and such video display system is very useful for beam studies and operation of the 40MeV linac,Besides,the design and test results are described in detail.

  10. Indus-2 beam line front end controls using real time operating system

    International Nuclear Information System (INIS)

    Beam Line Front Ends (BLFE) are crucial interfaces between machine user beam lines and INDUS-2 synchrotron radiation source. Twenty-seven beam lines are proposed in INDUS-2 synchrotron facility out of which some are operational by now and many more are about to come. The purpose of these BLFE's is essentially to protect the machine vacuum from beam line failures and vice versa and allow a well co-ordinated and safe usage of machine by its users. For controlling these beam lines, BLFE control system is implemented. The BLFE control system is based on three-layer architecture with equipments connected ate the layer three, Layer two serves the purpose of metadata storage, layer one serves as operator console (GUI). This paper discusses the scheme and architecture of layer two and layer three implementation using RTOS OS-9. The diagnostic features incorporated in the architecture increases the system uptime by quick diagnosis of system faults. (author)

  11. Embedded design based virtual instrument program for positron beam automation

    Energy Technology Data Exchange (ETDEWEB)

    Jayapandian, J.; Gururaj, K.; Abhaya, S.; Parimala, J. [Material Science Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, TN (India); Amarendra, G. [Material Science Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, TN (India)], E-mail: amar@igcar.gov.in

    2008-10-31

    Automation of positron beam experiment with a single chip embedded design using a programmable system on chip (PSoC) which provides easy interfacing of the high-voltage DC power supply is reported. Virtual Instrument (VI) control program written in Visual Basic 6.0 ensures the following functions (i) adjusting of sample high voltage by interacting with the programmed PSoC hardware, (ii) control of personal computer (PC) based multi channel analyzer (MCA) card for energy spectroscopy, (iii) analysis of the obtained spectrum to extract the relevant line shape parameters, (iv) plotting of relevant parameters and (v) saving the file in the appropriate format. The present study highlights the hardware features of the PSoC hardware module as well as the control of MCA and other units through programming in Visual Basic.

  12. Embedded design based virtual instrument program for positron beam automation

    Science.gov (United States)

    Jayapandian, J.; Gururaj, K.; Abhaya, S.; Parimala, J.; Amarendra, G.

    2008-10-01

    Automation of positron beam experiment with a single chip embedded design using a programmable system on chip (PSoC) which provides easy interfacing of the high-voltage DC power supply is reported. Virtual Instrument (VI) control program written in Visual Basic 6.0 ensures the following functions (i) adjusting of sample high voltage by interacting with the programmed PSoC hardware, (ii) control of personal computer (PC) based multi channel analyzer (MCA) card for energy spectroscopy, (iii) analysis of the obtained spectrum to extract the relevant line shape parameters, (iv) plotting of relevant parameters and (v) saving the file in the appropriate format. The present study highlights the hardware features of the PSoC hardware module as well as the control of MCA and other units through programming in Visual Basic.

  13. Embedded design based virtual instrument program for positron beam automation

    International Nuclear Information System (INIS)

    Automation of positron beam experiment with a single chip embedded design using a programmable system on chip (PSoC) which provides easy interfacing of the high-voltage DC power supply is reported. Virtual Instrument (VI) control program written in Visual Basic 6.0 ensures the following functions (i) adjusting of sample high voltage by interacting with the programmed PSoC hardware, (ii) control of personal computer (PC) based multi channel analyzer (MCA) card for energy spectroscopy, (iii) analysis of the obtained spectrum to extract the relevant line shape parameters, (iv) plotting of relevant parameters and (v) saving the file in the appropriate format. The present study highlights the hardware features of the PSoC hardware module as well as the control of MCA and other units through programming in Visual Basic

  14. Design Parameters of a High-Power Proton Synchrotron for Neutrino Beams at CERN

    CERN Document Server

    Papaphilippou, Y; Efthymiopoulos, I; Gerigk, F; Steerenberg, R

    2012-01-01

    Design studies have been initiated at CERN for exploring the prospects of future high-power proton beams for producing neutrinos within the LAGUNA-LBNO project. These studies include a possible increase of the SPS beam power from 500kW to 700kW for a new conventional neutrino beam line based on the CNGS technology, and at a second stage a 2 MW High-Power Proton Synchrotron (HP-PS) using the Low Power Superconducting Proton Linac (LP-SPL) as injector. A low energy 5GeV-4MW neutrino super-beam alternative based on a high-power version of SPL is also considered. This paper concentrates on the HP-PS by exploring the parameter space and constraints regarding beam characteristics, machine hardware and layout, for reaching the 2 MW average beam power.

  15. Design of RF chopper system for improving beam quality in FEL injector with thermionic gun

    International Nuclear Information System (INIS)

    For a linac-based Free Electron Laser (FEL), good beam quality largely contributes to the success of the final radiation. An imperfection confronted with the HUST THz-FEL facility is the long beam tail that emerges in the electron gun and exists through the whole beam line. This paper proposes to deploy a chopper system after the electron gun to truncate the beam tails before they enter into the linac. Physical dimensions of the chopper cavity are discussed in detail and we have developed and derived new analytical expressions applying to all frequencies for the optimal design. Also, technical issues of the cavity are considered. Beam dynamic simulation is performed to examine the truncation effect and the results show that more than 78% of the beam tail can be removed effectively, while preserving the emittance and energy spread in acceptable level

  16. An after-market, five-port vertical beam line extension for the PETtrace

    International Nuclear Information System (INIS)

    Most commercial cyclotrons intended for medical isotope production provide a limited number of beam ports crowded into a minimal vault space. Taking advantage of our new lab construction, we planned and installed a beam-line on port ♯2 of our GEMS PETtrace to bring beam to an additional 5 target positions. These are oriented in the vertical plane, with the downward directed beam well suited for molten target substrates.

  17. An after-market, five-port vertical beam line extension for the PETtrace

    Energy Technology Data Exchange (ETDEWEB)

    Barnhart, T. E.; Engle, J. W.; Severin, G. W.; Valdovinos, H. F.; Gagnon, K.; Nickles, R. J. [Department of Medical Physics, University of Wisconsin, Madison, WI (United States); Los Alamos National Lab, Los Alamos, NM (United States); Hevesy Laboratory, Danish Technical University, Riso (Denmark); Department of Medical Physics, University of Wisconsin, Madison, WI (United States); Department of Radiology, University of Washington, Seattle, WA (United States); Department of Medical Physics, University of Wisconsin, Madison, WI (United States)

    2012-12-19

    Most commercial cyclotrons intended for medical isotope production provide a limited number of beam ports crowded into a minimal vault space. Taking advantage of our new lab construction, we planned and installed a beam-line on port Music-Sharp-Sign 2 of our GEMS PETtrace to bring beam to an additional 5 target positions. These are oriented in the vertical plane, with the downward directed beam well suited for molten target substrates.

  18. CSR effect at XFEL-to-storage ring beam transport line, SPring-8

    International Nuclear Information System (INIS)

    A 300-meter long beam transport line will be built from the XFEL C-band linac to the existing 8 GeV storage ring at the SPring-8. The beam transport line is supposed to deliver femtosecond electron bunches with high peak current, being composed of 14 bending magnets and quadrupoles. Current status of the transport line construction plan is briefly presented. Since Coherent Synchrotron Radiation (CSR) could degrade a beam quality in such a transport line with multiple bends, tracking simulation on the effect has been employed to analyze the effect in the transport line. As a result, it was found that the CSR effect would not be negligible unless some modification would be made to either an electron bunch distribution or a lattice of the beam transport line. The numerical result on the CSR effect as well as a proposal to compress femtosecond bunches by positively utilizing CSR effect is shown. (author)

  19. Beam profile analysis using the CCD camera with cameralink in the SPring-8 booster ring and beam transport line

    International Nuclear Information System (INIS)

    We had measured a beam position and beam size by the analog video camera system with the fluorescence plate in the SPring-8 booster ring and beam transport line. It was difficult to estimate the seasonal change of the beam position and size quantitatively. We started building up the digital beam profile acquisition system which used a digital CCD camera with the external trigger synchronous capturing function in 2007. In the accelerator parameter tuning between operation cycles, it is necessary to understand the change of a beam orbit and shape from latest cycle quickly in limited tuning time. Thus, we need both information of real-time picture images for visual confirmation and computing real-time analysis results of beam position and size. In this case, the LED light for reading the scale on the fluorescence plate becomes a background noise for a calculation of the beam profile analysis. We improved the analysis program of beam position and size in order to separates the LED light and beam light from a captured image. By this improvement, the reproducibility and adjustment accuracy of orbital steering have been improved. We will report the program flow and the details from an image capture to a beam profile analysis. (author)

  20. Design for controllable optofluidic beam splitter

    Science.gov (United States)

    Tang, Xionggui; Liang, Shan; Li, Rujian

    2016-01-01

    A novel configuration for controllable optofluidic beam splitter is proposed, which consists of the asymmetric Y-branch waveguide and the microfluidic channel filled with fluid mixture. The beam propagation method (BPM) is employed to numerically investigate the optical performance of device in our layout. The simulated results demonstrate that arbitrary splitting ratio and low optical loss for both TE and TM mode can be easily achieved, with a low dependence of wavelength and polarization. Particularly, the optofluidic beam splitter has advantages such as compact structure and large fabrication tolerance. The proposed device provides a new way to manipulate the optical power splitting, and has wide potential applications in integrated optofluidic system.

  1. Design of a Nanometer Beam Size Monitor for ATF2

    CERN Document Server

    Suehara, Taikan; Yamanaka, Takashi; Yoda, Hakutaro; Nakamura, Tomoya; Kamiya, Yoshio; Honda, Yosuke; Kume, Tatsuya; Tauchi, Toshiaki; Sanuki, Tomoyuki; Komamiya, Sachio

    2008-01-01

    We developed an electron beam size monitor for extremely small beam sizes. It uses a laser interference fringe for a scattering target with the electron beam. Our target performance is < 2 nm systematic error for 37 nm beam size and < 10% statistical error in a measurement using 90 electron bunches for 25 - 6000 nm beam size. A precise laser interference fringe control system using an active feedback function is incorporated to the monitor to achieve the target performance. We describe an overall design, implementations, and performance estimations of the monitor.

  2. The design and performance of the FNAL high-energy polarized beam facility

    International Nuclear Information System (INIS)

    We describe a new polarized-proton and -antiproton beam with 185-GeV/c momentum in the Fermilab MP beam line which is currently operational. The design uses the parity-conserving decay of lambda and antilambda hyperons to produce polarized protons and antiprotons, respectively. A beam-transport system minimizes depolarization effects and uses a set of 12 dipole magnets that rotate the beam-particle spin direction. A beam-tagging system determines the momentum and polarization of individual beam particles, allowing a selection of particles in definite intervals at momentum and polarization. We measured polarization of the beam by using two types of polarimeters, which verified the determination of polarization by a beam-particle tagging system. Two of these processes are the inverse-Primakoff effect and the Coulomb-nuclear interference (CNI) in elastic proton-proton scattering. Another experiment measured the π0 production asymmetry of large-xF values; this process may now be used as an on-line beam polarimeter. 9 refs., 9 figs

  3. Cancellation of thermal deformation effect of the initial mirror on the beam profile monitor line

    International Nuclear Information System (INIS)

    The electron storage ring NewSUBARU has a visible light beam monitor line SR5. The two dimensional beam image obtained on this line is used in various beam diagnostics, such as a streak camera and a gated ICCD camera. One problem of this line was a stored current dependence of its imaging property. This was due to the mirror deformation produced by a heat load of synchrotron radiation. The effect of this deformation is approximated by a defocusing function in the lowest order. A simple defocusing can be handled by an adjustment of the assumed beam image position. However, the deformation was different for the horizontal and vertical directions. We installed a weak cylindrical lens to eliminate this difference. The current dependent imbalance of the deformation was cancelled by changing location of the lens according to the prediction. We succeeded to obtain a good two dimensional beam image at any electron beam energy and stored current. (author)

  4. Design of Multi-Harmonic Buncher for Pulsed Proton Beam

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Han-Sung; Kwon, Hyeok-Jung; Cho, Yong-Sub [Korea Atomic Energy Research Institute, Gyeongju (Korea, Republic of)

    2014-10-15

    Fast neutrons with a broad spectrum can be generated by irradiating the proton beams on target materials. To measure the neutron energy by time of flight (TOF) method, we need pulsed proton beam. The short pulse width of the proton beam is preferred because the neutron energy uncertainty is proportional to the pulse width. In addition, the pulse repetition rate should be low enough to extend the lower limit of the available neutron energy. To generate short pulse proton beam, we adopted a deflector and slit system. In a simple deflector with slit system, most of the proton beam is blocked by slit, especially when the beam pulse width is short. Therefore, the available beam current is very low, which results in low neutron flux. We proposed beam modulation by using buncher cavity to increase the available beam current. The ideal field pattern for the buncher cavity is saw-tooth type. To make the field pattern similar to the saw-tooth waveform, we adopted a multi-harmonic buncher. The design for the multi-harmonic buncher including 3D electromagnetic calculation is presented in this paper. A multi-harmonic buncher for a proton beam chopper system to generate a short pulse neutron beam was designed. The frequency of the fundamental mode is 50 MHz and the resonant structure up to 3{sup rd} harmonics is used.

  5. Simulations of LEIR Injection Line Beam Position Monitors

    CERN Document Server

    Maltseva, Mariya

    2016-01-01

    In this paper sensitivity characteristics of a beam position monitor are described. Characteristics are obtained during the simulations in CST Studio, the results are compared with the calculated values. The results for a low-beta beam and with a wire are compared.

  6. Design and beam tests of an RFQ to accelerate a lead ion beam from a laser ion source

    International Nuclear Information System (INIS)

    A Radio Frequency Quadrupole (RFQ) for acceleration of a 10 mA lead 18+ ion beam from 6.9 keV/u to 100 keV/u has been designed, built and tested in the framework of the CERN Laser Ion Source (LIS) study. The challenge of the RFQ design was to deal with a lead ion beam that includes about 10 charge states with an overall current of some 100 mA. A new RFQ design, intermediate between the two standard high-intensity and low-intensity designs, has been applied in order to have a compact structure giving small longitudinal emittance and high transmission. The transport and matching line from the source to the RFQ is made of two solenoids. The unwanted charge states are not filtered and will enter the RFQ mis-matched. In order to test the RFQ performance proper it was decided to operate it with an equivalent mono-species proton beam during the first stage of the commissioning. The design criteria for this intermediate current RFQ, the problems involved in dealing with a mixture of different charge states, as well as the results of the first test with an equivalent proton beam are presented in this paper. (author)

  7. A anti p p experiment and K4 beam line at KEK

    International Nuclear Information System (INIS)

    An experiment on anti p p reaction at rest has been conducted at KEK (National Laboratory for High Energy Physics). Though the data taking were finished more than six months ago, the analysis is still being made. So, the final results and the physics involved cannot be discussed yet. The experimental procedure is mainly described as experiments using the new beam line K4. Attached to the C extraction line, the beam line features a large acceptance together with a two-stage separator. It is intended to publicize quality of this beam line and to encourage nuclear physicists to use the beam line and evenfually the spectrometer used in this experiment in future. (Mori, K.)

  8. Third-order TRANSPORT: A computer program for designing charged particle beam transport systems

    International Nuclear Information System (INIS)

    TRANSPORT has been in existence in various evolutionary versions since 1963. The present version of TRANSPORT is a first-, second-, and third-order matrix multiplication computer program intended for the design of static-magnetic beam transport systems. This report discusses the following topics on TRANSPORT: Mathematical formulation of TRANSPORT; input format for TRANSPORT; summaries of TRANSPORT elements; preliminary specifications; description of the beam; physical elements; other transformations; assembling beam lines; operations; variation of parameters for fitting; and available constraints -- the FIT command

  9. Design, simulation and construction of quadrupole magnets for focusing electron beam in powerful industrial electron accelerator

    OpenAIRE

    S KH Mousavi; A M Poursaleh; S Haseltalab; M Mortazavi; A Behjat; Atefi, M.

    2015-01-01

    In this paper the design and simulation of quadrupole magnets and electron beam optical of that by CST Studio code has been studied. Based on simulation result the magnetic quadrupole has been done for using in beam line of first Iranian powerful electron accelerator. For making the suitable magnetic field the effects of material and core geometry and coils current variation on quadrupole magnetic field have been studied. For test of quadrupole magnet the 10 MeV beam energy and 0.5 pi mm...

  10. Design of the ILC Prototype FONT4 Digital Intra-Train Beam-Based Feedback System

    International Nuclear Information System (INIS)

    We present the design of the FONT4 digital intra-train beam position feedback system prototype and preliminary results of initial beam tests at the Accelerator Test Facility (ATF) at KEK. The feedback system incorporates a fast analogue beam position monitor (BPM) front-end signal processor, a digital feedback board, and a kicker driver amplifier. The short bunchtrain, comprising 3 electron bunches separated by c. 150ns, in the ATF extraction line was used to test components of the prototype feedback system

  11. Numerical determination of injector design for high beam quality

    International Nuclear Information System (INIS)

    The performance of a free electron laser strongly depends on the electron beam quality or brightness. The electron beam is transported into the free electron laser after it has been accelerated to the desired energy. Typically the maximum beam brightness produced by an accelerator is constrained by the beam brightness deliverd by the accelerator injector. Thus it is important to design the accelerator injector to yield the required electron beam brightness. The DPC (Darwin Particle Code) computer code has been written to numerically model accelerator injectors. DPC solves for the transport of a beam from emission through acceleration up to the full energy of the injector. The relativistic force equation is solved to determine particle orbits. Field equations are solved for self consistent electric and magnetic fields in the Darwin approximation. DPC has been used to investigate the beam quality consequences of A-K gap, accelerating stress, electrode configuration and axial magnetic field profile

  12. The on-line beam control and diagnosis system of TARN

    International Nuclear Information System (INIS)

    The computer network in TARN is composed of a central main frame computer, two different minicomputers and several microprocessors. It has been used for the beam control and the beam diagnosis; support for adjustment of elements of the transport line and the ring, generation of RF voltage function, measurement of beam profile at RF stacking, on-line measurement of ν:value, and observation of Schottky signal. By the use of this computer system, the operation of TARN has been effectively and steadily performed, and additionally it has contributed to measuring the beam characteristics precisely in the ring. (author)

  13. STRUCTURE DESIGN OF THE BEIJING SPECTROMETER Ⅲ BEAM PIPE

    Institute of Scientific and Technical Information of China (English)

    ZHENG Lifang; JI Quan; WANG Li; LI Xunfeng; XU Shaowang; DONG Sujun; ZHAO Libin; LIU Jianping

    2008-01-01

    The Beijing spectrometer Ⅲ (BESⅢ) beam pipe is in the center of the BESⅢ, which is the detector of the upgrade project of Beijing electron and positron collider (BEPCⅡ). Electrons and positrons collide in the BESⅢ beam pipe. According to the demands of the BEPCⅡ, a key program of Chinese Academy of Sciences, the BESⅢ beam pipe is designed based on the finite elements analysis. The BESⅢ beam pipe is installed in the inner cylinder of the BESⅢ drift chamber. As a vacuum tube, the BESⅢ beam pipe is designed as 1 000 mm in length, 63 mm in inner diameter and 114 mm in outer diameter, respectively. The BESⅢ beam pipe consists of a central beryllium pipe cooled by EDM-1, the oil No.1 for electric discharge machining, and two extended copper pipes cooled by deionized water (DW). The three parts are jointed by vacuum welding. Factors taken into account in the design are as follows. ① The wall thickness of the central beryllium pipe should be designed as small as possible to reduce the multi-scattering and improve the particle momentum resolution. And the wall thickness of the extended copper pipe should be designed as large as possible to protect the detectors from the backgrounds. ② The BESⅢ beam pipe must be sufficiently cooled to avoid the damage and prevents its influence to the BESⅢ drift chamber (DC) operation. The inner surface temperature of the DC inner cylinder must be maintained at 293±2 K. ③ The magnetic permeability of the materials used in the BESⅢ beam pipe must be less than 1.05 H/m to avoid large magnetic field distortions. ④ The static pressure of the vacuum chamber of the BESⅢ beam pipe must be less than 800 (Pa. The simulating results show that the designed structure of the BESⅢ beam pipe satisfies the requirements mentioned above. The structure design scheme is evaluated and adopted by the headquarters of BEPCⅡ.

  14. Toward design of the Collider Beam Collimation System

    International Nuclear Information System (INIS)

    A multi-component beam collimation system for the Superconducting Super Collider is described. System choice justification and design requirements are presented. System consists of targets, scrapers, and collimators with appropriate cooling and radiation shielding. Each component has an independent control for positioning and aligning with respect to the beam. Results of beam loss distribution, energy deposition calculations, and thermal analyses, as well as cost estimate, are presented

  15. A Monitor and Control System for the Synchrotron Radiation Beam Lines at DAΦNE

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Three synchrotron radiation beam lines have been built on DAΦNE,the Frascati electron-positron accelerator.It is Possible to monitor and control all the elements on the beam lines using a modular network distributed I/O system by National Instrunments (FieldPoint) with Bridge VIEW/Lab VIEW programs,Two of these beam lines have radiation safety problems solved by two independent and redundant systems,using mechanical switches ,and S7-200 PLC's by Siemens.In this article our solution will be described in details.

  16. Developing an expert system to control a beam line at the Los Alamos Meson Physics Facility

    International Nuclear Information System (INIS)

    High energy particle experiments require an accelerator as a source of high energy particles. To increase the productivity of an accelerator facility, we wish to develop an expert system to control beam lines. Expert Systems are a branch of Artificial Intelligence where a computer program performs tasks requiring human expertise. Unlike most expert systems we have a physical model underlying our beam line and this model can be used with the expert system to improve performance. The development of the expert system will lead to an increased understanding of the beam line as well as the possibility of state-of-the-art expert system building

  17. Upgrade of the beam transport lines and the beam-abort system and development of a tune compensator in KEKB

    Science.gov (United States)

    Iida, Naoko; Kikuchi, Mitsuo; Mimashi, Toshihiro; Nakayama, Hisayoshi; Sakamoto, Yutaka; Satoh, Kotaro; Takasaki, Seiji; Tawada, Masafumi

    2013-03-01

    The KEKB collider achieved a maximum peak luminosity of 2.1×1034 cm-2 s-1 and an integrated luminosity of 1 ab-1 in its ten-year operation. Behind these glorious records there have been uncountable improvements in every subsystem. This paper describes the improvements in the beam transport line, injection kickers, septum magnets, the beam-abort system, and a newly developed pulsed-quadrupole system in detail.

  18. Development of a transverse beam emittance and Twiss parameters measurement system for transport line-1

    International Nuclear Information System (INIS)

    Beam Transport Line-1 (TL-1) in Indus Accelerator Complex at Raja Ramanna Centre for Advanced Technology (RRCAT), Indore is being used to transport 20 MeV, 30 mA beam from the injector Microton exit point to the Booster Synchrotron where energy of electron beam is raised from 20 MeV to 450 MeV for injection into Indus-1 storage ring and 550 MeV to Indus-2 storage ring. It is important to measure the transverse beam emittance and Twiss parameters at Microton beam exit point for beam optics optimization in the transport line and to judge the beam quality. A transverse emittance and Twiss parameters measurement system using quadrupole scan method has been developed and tested. The system uses the electron beam images from the existing scintillator based beam profile monitor installed in TL-1 for beam size measurement. We have developed MATLAB codes that can extract transverse beam size and estimate transverse beam emittance. This paper describes the measurement method, software and some initial results obtained using this system. (author)

  19. Transport line for beam generated by ITEP Bernas ion source

    International Nuclear Information System (INIS)

    A joint research and development program is underway to investigate beam transport systems for intense steady-state ion sources for ion implanters. Two energy extremes of MeV and hundreds of eV are investigated using a modified Bernas ion source with an indirectly heated cathode. Results are presented for simulations of electrostatic systems performed to investigate the transportation of ion beams over a wide mass range: boron to decaborane

  20. The MICE Muon Beam on ISIS and the beam-line instrumentation of the Muon Ionization Cooling Experiment

    Energy Technology Data Exchange (ETDEWEB)

    Bogomilov, M.; Karadzhov, Y.; Kolev, D.; Russinov, I.; Tsenov, R.; Vankova-Kirilova, G.; Wang, L.; Xu, F. Y.; Zheng, S. X.; Bertoni, R.; Bonesini, M.; Ferri, F.; Lucchini, G.; Mazza, R.; Paleari, F.; Strati, F.; Palladino, V.; Cecchet, G.; Bari, A. de; Capponi, M.; Cirillo, A.; Iaciofano, A.; Manfredini, A.; Parisi, M.; Orestano, D.; Pastore, F.; Tonazzo, A.; Tortora, L.; Mori, Y.; Kuno, Y.; Sakamoto, H.; Sato, A.; Yano, T.; Yoshida, M.; Ishimoto, S.; Suzuki, S.; Yoshimura, K.; Filthaut, F.; Garoby, R.; Gilardoni, S.; Gruber, P.; Hanke, K.; Haseroth, H.; Janot, P.; Lombardi, A.; Ramberger, S.; Vretenar, M.; Bene, P.; Blondel, A.; Cadoux, F.; Graulich, J. -S; Grichine, V.; Gschwendtner, E.; Masciocchi, F.; Sandstrom, R.; Verguilov, V.; Wisting, H.; Petitjean, C.; Seviour, R.; Alexander, J.; Charnley, G.; Collomb, N.; Griffiths, S.; Martlew, B.; Moss, A.; Mullacrane, I.; Oates, A.; Owens, P.; White, C.; York, S.; Adams, D.; Apsimon, R.; Barclay, P.; Baynham, D. E.; Bradshaw, T. W.; Courthold, M.; Drumm, P.; Edgecock, R.; Hayler, T.; Hills, M.; Ivaniouchenkov, Y.; Jones, A.; Lintern, A.; MacWaters, C.; Nelson, C.; Nichols, A.; Preece, R.; Ricciardi, S.; Rochford, J. H.; Rogers, C.; Spensley, W.; Tarrant, J.; Tilley, K.; Watson, S.; Wilson, A.; Forrest, D.; Soler, F. J. P.; Walaron, K.; Cooke, P.; Gamet, R.; Alekou, A.; Apollonio, M.; Barber, G.; Beuselinck, R.; Clark, D.; Clark, I.; Colling, D.; Dobbs, A.; Dornan, P.; Fayer, S.; Fish, A.; Hare, R.; Greenwood, S.; Jamdagni, A.; Kasey, V.; Khaleeq, M.; Leaver, J.; Long, K.; McKigney, E.; Matsushita, T.; Pasternak, J.; Sashalmi, T.; Savidge, T.; Takahashi, M.; Blackmore, V.; Carlisle, T.; Cobb, J. H.; Lau, W.; Rayner, M.; Tunnell, C. D.; Witte, H.; Yang, S.; Booth, C. N.; Hodgson, P.; Howlett, L.; Nicholson, R.; Overton, E.; Robinson, M.; Smith, P.; Adey, D.; Back, J.; Boyd, S.; Harrison, P.; Ellis, M.; Kyberd, P.; Littlefield, M.; Nebrensky, J. J.; Bross, A. D.; Geer, S.; Neuffer, D.; Moretti, A.; Popovic, M.; Cummings, M. A. C.; Roberts, T. J.; DeMello, A.; Green, M. A.; Li, D.; Virostek, S.; Zisman, M. S.; Freemire, B.; Hanlet, P.; Huang, D.; Kafka, G.; Kaplan, D. M.; Snopok, P.; Torun, Y.; Blot, S.; Kim, Y. K.; Bravar, U.; Onel, Y.; Cline, D.; Fukui, Y.; Lee, K.; Yang, X.; Rimmer, R. A.; Cremaldi, L. M.; Gregoire, G.; Hart, T. L.; Sanders, D. A.; Summers, D. J.; Coney, L.; Fletcher, R.; Hanson, G. G.; Heidt, C.; Gallardo, J.; Kahn, S.; Kirk, H.; Palmer, R. B.

    2012-05-01

    The international Muon Ionization Cooling Experiment (MICE), which is under construction at the Rutherford Appleton Laboratory (RAL), will demonstrate the principle of ionization cooling as a technique for the reduction of the phase-space volume occupied by a muon beam. Ionization cooling channels are required for the Neutrino Factory and the Muon Collider. MICE will evaluate in detail the performance of a single lattice cell of the Feasibility Study 2 cooling channel. The MICE Muon Beam has been constructed at the ISIS synchrotron at RAL, and in MICE Step I, it has been characterized using the MICE beam-instrumentation system. In this paper, the MICE Muon Beam and beam-line instrumentation are described. The muon rate is presented as a function of the beam loss generated by the MICE target dipping into the ISIS proton beam. For a 1 V signal from the ISIS beam-loss monitors downstream of our target we obtain a 30 KHz instantaneous muon rate, with a neglible pion contamination in the beam.

  1. The MICE Muon Beam on ISIS and the beam-line instrumentation of the Muon Ionization Cooling Experiment

    CERN Document Server

    Bogomilov, M.

    2012-01-01

    The international Muon Ionization Cooling Experiment (MICE), which is under construction at the Rutherford Appleton Laboratory (RAL), will demonstrate the principle of ionization cooling as a technique for the reduction of the phase-space volume occupied by a muon beam. Ionization cooling channels are required for the Neutrino Factory and the Muon Collider. MICE will evaluate in detail the performance of a single lattice cell of the Feasibility Study 2 cooling channel. The MICE Muon Beam has been constructed at the ISIS synchrotron at RAL, and in MICE Step I, it has been characterized using the MICE beam-instrumentation system. In this paper, the MICE Muon Beam and beam-line instrumentation are described. The muon rate is presented as a function of the beam loss generated by the MICE target dipping into the ISIS proton beam. For a 1 V signal from the ISIS beam-loss monitors downstream of our target we obtain a 30 KHz muon rate, with a neglible pion contamination in the beam.

  2. Beam optical design of in-flight fragment separator for high-power heavy ion beam

    International Nuclear Information System (INIS)

    Highlights: • An in-flight fragment separator is designed in beam optics using GICOSY, COSY Infinity, LISE++ and MOCADI. • High power primary beam is removed in the pre-separator employing four dipole magnets. • Different charge states of the primary and unwanted isotope beams help in reducing peak power density at the beam dump. -- Abstract: An in-flight fragment separator has been designed for the rare isotope science project (RISP) in Korea. A beam used for the design is 238U in the energy of 200 MeV/u with the maximum beam power of 400 kW. The use of high-power beam requires careful removal of the primary beam by pre-separator, for which its configuration was revised to employ four dipole magnets instead of two. Different configurations of the separator have been tested in search of optimal design in non-linear optics, which was complicated by the space needed for the target, beam dump and radiation shielding. Non-linear optical calculations have been carried out using GICOSY and COSY Infinity including the fringe fields of large-aperture quadrupole magnets. Correction of non-linear terms is made with multipole coils located inside the superconducting quadrupole magnets and by external multipole magnets. Beam simulations using LISE++ and MOCADI have been performed to consider the effects of multiple charge states of the primary and isotope beams produced at the target. Layout of the separator is being finalized, and detailed optics simulation will continue to refine its design

  3. Visualization and on line monitoring of geometric parameters of beams at KSRS

    CERN Document Server

    Ioudin, L; Potlovsky, K; Rezvov, V

    2001-01-01

    On the basis of developed hardware and software we investigate the opportunity of on line registration of geometric parameters of low intensity SR beam and electron beams in single shot mode. Ionization and luminescence detectors form real optic image of a beam cross section. The image is registered by a TV camera, digitized and processed by a computer. Gray scale image and profiles of a beam are represented. Accumulation and statistic processing of the data give the possibility to increase the sensitivity of the hardware and to calculate the average position of the beam gravity center, dispersion and statistic uncertainty.

  4. Design of a Ku band miniature multiple beam klystron

    Science.gov (United States)

    Bandyopadhyay, Ayan Kumar; Pal, Debasish; Saini, Anil; Kant, Deepender; Saha, Sukalyan; Joshi, Lalit Mohan

    2016-03-01

    The design of a miniature multiple beam klystron (MBK) working in the Ku-band frequency range is presented in this article. Starting from the main design parameters, design of the electron gun, the input and output couplers and radio frequency section (RF-section) are presented. The design methodology using state of the art commercial electromagnetic design tools, analytical formulae as well as noncommercial design tools are briefly presented in this article.

  5. Beam halo monitoring at J-PARC 3-50 beam transport line using long air ionization chamber

    International Nuclear Information System (INIS)

    3 long-type Air Ionization Chambers (AICs) have been installed along 350BT which is the beam transport from the 3GeV Rapid Cycling Synchrotron (RCS) to the Main Ring synchrotron (MR) to monitor beam losses. 3-50BT collimators are used to remove beam halo components outside the emittance larger than 54[πmm · mrad] for horizontal and 60[πmm · mrad] for vertical plane, at present operations. By measuring the beam loss induced radiations from the 3-50BT collimators, the beam halo components have been monitoring on line. Details of the system, calibration results, and resolution of the system will be described in this paper. (author)

  6. Two-line-coupling beam-quality effects in stimulated Raman scattering

    International Nuclear Information System (INIS)

    The authors present the results of calculations of the beam quality obtainable in a collimated, single-beam Raman beam cleanup system, in which the pump laser contains two lines whose frequency separation is enough to cause significant dispersive ''slip'' between them in the Raman amplifier. A specific example is the 351-353 nm line pair of an XeF laser. They start from equations coupling the various modes of the lines and their corresponding Stokes modes. Refractivity effects caused by nonuniform Raman-induced population transfer are specifically accounted for. The impact on beam quality is assessed as a function of the pressure in a H/sub 2/ Raman amplifier, and it is shown that the minimum effect occurs at a pressure of 2.4 Atm, for which the motionally narrowed Raman linewidth takes its minimum value. The two-line coupling causes the population transfer due to the stronger of the two lines to adversely affect the beam quality of the weaker line. For an rms percent fluence modulation of 15 percent, the two-line coupling lowers the Strehl ratio (a measure of beam quality) by --15 percent for a 1-μs XeF laser pulse length

  7. Design, simulation and construction of quadrupole magnets for focusing electron beam in powerful industrial electron accelerator

    Directory of Open Access Journals (Sweden)

    S KH Mousavi

    2015-09-01

    Full Text Available In this paper the design and simulation of quadrupole magnets and electron beam optical of that by CST Studio code has been studied. Based on simulation result the magnetic quadrupole has been done for using in beam line of first Iranian powerful electron accelerator. For making the suitable magnetic field the effects of material and core geometry and coils current variation on quadrupole magnetic field have been studied. For test of quadrupole magnet the 10 MeV beam energy and 0.5 pi mm mrad emittance of input beam has been considered. We see the electron beam through the quadrupole magnet focus in one side and defocus in other side. The optimum of distance between two quadrupole magnets for low emittance have been achieved. The simulation results have good agreement with experimental results

  8. Design of a prompt gamma neutron activation analysis system and neutron beam characteristics at HANARO

    International Nuclear Information System (INIS)

    The design features and neutron beam characteristics are described for a prompt gamma neutron activation analysis(PGNAA) system at HANARO in Korea Atomic Energy Research Institute(KAERI). As a method to obtain clean beam of thermal neutrons, Bragg diffraction technique of using PG crystal is applied. The Bragg angle is set at 45 .deg. and the diffracted beam is a polychromatic one composed of neutrons from all diffraction orders n(≤n≤6). The fast neutron and gamma backgrounds will be low enough due to the use of diffracted beam and a tapered collimator. A neutron flux of 1.0x108 n/cm2sec is calculated at sample position by considering the reflectivity of PG crystal. The γ-ray detection system is comprised of a 30% n-type HPGe detector, signal electronics and a fast ADC. Construction of the beam line and setting up of the detection system is proceeding

  9. Multiple Scattering in Beam-line Detectors of the MUSE Experiment

    Science.gov (United States)

    Garland, Heather; Robinette, Clay; Strauch, Steffen; MUon Scattering Experiment (MUSE) Collaboration

    2015-10-01

    The charge radius of the proton has been obtained precisely from elastic electron-scattering data and spectroscopy of atomic hydrogen. However, a recent experiment using muonic hydrogen, designed for high-precision, presented a charge radius significantly smaller than the accepted value. This discrepancy certainly prompts a discussion of topics ranging from experimental methods to physics beyond the Standard Model. The MUon Scattering Experiment (MUSE) collaboration at the Paul Scherrer Institute, Switzerland, is planning an experiment to measure the charge radius of the proton in elastic scattering of electrons and muons of positive and negative charge off protons. In the layout for the proposed experiment, detectors will be placed in the beam line upstream of a hydrogen target. Using Geant4 simulations, we studied the effect of multiple scattering due to these detectors and determined the fraction of primary particles that hit the target for a muon beam at each beam momentum. Of the studied detectors, a quartz Cherenkov detector caused the largest multiple scattering. Our results will guide further optimization of the detector setup. Supported in parts by the U.S. National Science Foundation: NSF PHY-1205782.

  10. Transport and dosimetric solutions for the ELIMED laser-driven beam line

    Energy Technology Data Exchange (ETDEWEB)

    Cirrone, G.A.P. [INFN-LNS, Via S. Sofia 62 - 95125 Catania (Italy); Romano, F. [INFN-LNS, Via S. Sofia 62 - 95125 Catania (Italy); Medical Physics School, University of Catania, Via S. Sofia 64 - 95125 Catania (Italy); Scuderi, V. [INFN-LNS, Via S. Sofia 62 - 95125 Catania (Italy); Institute of Physics ASCR, v.v.i. (FZU), ELI-Beamlines Project, Na Slovance 2, 182 21 Prague (Czech Republic); Amato, A. [INFN-LNS, Via S. Sofia 62 - 95125 Catania (Italy); Candiano, G. [INFN-LNS, Via S. Sofia 62 - 95125 Catania (Italy); Medical Physics School, University of Catania, Via S. Sofia 64 - 95125 Catania (Italy); Cuttone, G. [INFN-LNS, Via S. Sofia 62 - 95125 Catania (Italy); Giove, D. [INFN Sezione di Milano, Via Celoria 16, Milano (Italy); Korn, G.; Krasa, J. [Institute of Physics ASCR, v.v.i. (FZU), ELI-Beamlines Project, Na Slovance 2, 182 21 Prague (Czech Republic); Leanza, R. [INFN-LNS, Via S. Sofia 62 - 95125 Catania (Italy); Universitá degli Studi di Catania, Dipartimento di Fisica e Astronomia, Via S. Sofia 64, Catania (Italy); Manna, R. [INFN-LNS, Via S. Sofia 62 - 95125 Catania (Italy); Maggiore, M. [INFN-LNL, Viale dell' Universitá 2 - 35020 Legnaro (PD) (Italy); Marchese, V. [INFN-LNS, Via S. Sofia 62 - 95125 Catania (Italy); Margarone, D. [Institute of Physics ASCR, v.v.i. (FZU), ELI-Beamlines Project, Na Slovance 2, 182 21 Prague (Czech Republic); Milluzzo, G. [INFN-LNS, Via S. Sofia 62 - 95125 Catania (Italy); Universitá degli Studi di Catania, Dipartimento di Fisica e Astronomia, Via S. Sofia 64, Catania (Italy); Petringa, G. [INFN-LNS, Via S. Sofia 62 - 95125 Catania (Italy); Sabini, M.G. [INFN-LNS, Via S. Sofia 62 - 95125 Catania (Italy); Azienda Ospedaliera Cannizzaro, Via Messina 829 - 95100 Catania (Italy); Schillaci, F. [INFN-LNS, Via S. Sofia 62 - 95125 Catania (Italy); Medical Physics School, University of Catania, Via S. Sofia 64 - 95125 Catania (Italy); and others

    2015-10-01

    Within 2017, the ELIMED (ELI-Beamlines MEDical applications) transport beam-line and dosimetric systems for laser-generated beams will be installed at the ELI-Beamlines facility in Prague (CZ), inside the ELIMAIA (ELI Multidisciplinary Applications of laser–Ion Acceleration) interaction room. The beam-line will be composed of two sections: one in vacuum, devoted to the collecting, focusing and energy selection of the primary beam and the second in air, where the ELIMED beam-line dosimetric devices will be located. This paper briefly describes the transport solutions that will be adopted together with the main dosimetric approaches. In particular, the description of an innovative Faraday Cup detector with its preliminary experimental tests will be reported.

  11. Split-aperture laser pulse compressor design tolerant to alignment and line-density differences.

    Science.gov (United States)

    Rushford, Michael C; Britten, Jerald A; Barty, Christopher P J; Jitsuno, Takahisa; Kondo, Kiminori; Miyanaga, Noriaki; Tanaka, Kazuo A; Kodama, Ryosuke; Xu, Guang

    2008-08-15

    We introduce a four-pass laser pulse compressor design based on two grating apertures with two gratings per aperture that is tolerant to some alignment errors and, importantly, to grating-to-grating period variations. Each half-beam samples each grating in a diamond-shaped compressor that is symmetric about a central bisecting plane. For any given grating, the two half-beams impinge on opposite sides of its surface normal. It is shown that the two split beams have no pointing difference from paired gratings with different periods. Furthermore, no phase shift between half-beams is incurred as long as the planes containing a grating line and the surface normal for each grating of the pair are parallel. For grating pairs satisfying this condition, gratings surfaces need not be on the same plane, as changes in the gap between the two can compensate to bring the beams back in phase. PMID:18709127

  12. Dual scattering foil design for poly-energetic electron beams.

    Science.gov (United States)

    Kainz, K K; Antolak, J A; Almond, P R; Bloch, C D; Hogstrom, K R

    2005-03-01

    The laser wakefield acceleration (LWFA) mechanism can accelerate electrons to energies within the 6-20 MeV range desired for therapy application. However, the energy spectrum of LWFA-generated electrons is broad, on the order of tens of MeV. Using existing laser technology, the therapeutic beam might require a significant energy spread to achieve clinically acceptable dose rates. The purpose of this work was to test the assumption that a scattering foil system designed for a mono-energetic beam would be suitable for a poly-energetic beam with a significant energy spread. Dual scattering foil systems were designed for mono-energetic beams using an existing analytical formalism based on Gaussian multiple-Coulomb scattering theory. The design criterion was to create a flat beam that would be suitable for fields up to 25 x 25 cm2 at 100 cm from the primary scattering foil. Radial planar fluence profiles for poly-energetic beams with energy spreads ranging from 0.5 MeV to 6.5 MeV were calculated using two methods: (a) analytically by summing beam profiles for a range of mono-energetic beams through the scattering foil system, and (b) by Monte Carlo using the EGS/BEAM code. The analytic calculations facilitated fine adjustments to the foil design, and the Monte Carlo calculations enabled us to verify the results of the analytic calculation and to determine the phase-space characteristics of the broadened beam. Results showed that the flatness of the scattered beam is fairly insensitive to the width of the input energy spectrum. Also, results showed that dose calculated by the analytical and Monte Carlo methods agreed very well in the central portion of the beam. Outside the useable field area, the differences between the analytical and Monte Carlo results were small but significant, possibly due to the small angle approximation. However, these did not affect the conclusion that a scattering foil system designed for a mono-energetic beam will be suitable for a poly

  13. Dual scattering foil design for poly-energetic electron beams

    International Nuclear Information System (INIS)

    The laser wakefield acceleration (LWFA) mechanism can accelerate electrons to energies within the 6-20 MeV range desired for therapy application. However, the energy spectrum of LWFA-generated electrons is broad, on the order of tens of MeV. Using existing laser technology, the therapeutic beam might require a significant energy spread to achieve clinically acceptable dose rates. The purpose of this work was to test the assumption that a scattering foil system designed for a mono-energetic beam would be suitable for a poly-energetic beam with a significant energy spread. Dual scattering foil systems were designed for mono-energetic beams using an existing analytical formalism based on Gaussian multiple-Coulomb scattering theory. The design criterion was to create a flat beam that would be suitable for fields up to 25 x 25 cm2 at 100 cm from the primary scattering foil. Radial planar fluence profiles for poly-energetic beams with energy spreads ranging from 0.5 MeV to 6.5 MeV were calculated using two methods: (a) analytically by summing beam profiles for a range of mono-energetic beams through the scattering foil system, and (b) by Monte Carlo using the EGS/BEAM code. The analytic calculations facilitated fine adjustments to the foil design, and the Monte Carlo calculations enabled us to verify the results of the analytic calculation and to determine the phase-space characteristics of the broadened beam. Results showed that the flatness of the scattered beam is fairly insensitive to the width of the input energy spectrum. Also, results showed that dose calculated by the analytical and Monte Carlo methods agreed very well in the central portion of the beam. Outside the useable field area, the differences between the analytical and Monte Carlo results were small but significant, possibly due to the small angle approximation. However, these did not affect the conclusion that a scattering foil system designed for a mono-energetic beam will be suitable for a poly

  14. Novel design for a high power superconducting delay line

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Y.J.; Caporaso, G.J.

    1997-05-08

    Potential designs for a high power superconducting delay line of approximately 10ms duration are described. The transmitted signal should have low dispersion and little attenuation to recapture the original signal. Such demands cannot be met using conventional metal conductors. This paper outlines a proposal for a new transmission line design using low temperature superconducting material which meets system specifications. The 25W line is designed to carry pulsed signals with an approximate rise time of 8 nsec and a maximum voltage of 25kV. Predicted electrical design and performance of the line is presented.

  15. Beam Loss Studies for the 2-MW LBNE Proton Beam Line

    Energy Technology Data Exchange (ETDEWEB)

    Drozhdin, A.I.; Childress, S.R.; Mokhov, N.V.; Tropin, I.S.; Zwaska, R.; /Fermilab

    2012-05-01

    Severe limits are put on allowable beam loss during extraction and transport of a 2.3 MW primary proton beam for the Long Baseline Neutrino Experiment (LBNE) at Fermilab. Detailed simulations with the STRUCT and MARS codes have evaluated the impact of beam loss of 1.6 x 10{sup 14} protons per pulse at 120 GeV, ranging from a single pulse full loss to sustained small fractional loss. It is shown that loss of a single beam pulse at 2.3 MW will result in a catastrophic event: beam pipe destruction, damaged magnets and very high levels of residual radiation inside and outside the tunnel. Acceptable beam loss limits have been determined and robust solutions developed to enable efficient proton beam operation under these constraints.

  16. Opto-mechanical design of a beam launch telescope

    Science.gov (United States)

    Moon, Il; Lee, Soosang; Cho, Myung K.

    2005-08-01

    The design and development of a beam launch telescope (BLT) was addressed herein. The BLT optical instruments have been commonly used for the applications of adaptive optics (laser guide star), optical communications, and other laser powered optical systems. In this study, a BLT with a primary mirror of 700 mm was investigated as a prototype optical system. The BLT optical system includes a lightweight primary mirror of 700 mm in daimeter, a secondary mirror of 110 mm, a fast steering mirror of 200 mm, and three flat mirrors (array/relay mirrors) of 200 mm. As a test bed, the BLT system was optimized for a spot size of 100mm at a far field (departed by 1km from the telescope). In this design and development study, a wide range of the opto-mechanical and structural analyses have been performed including: static (gravity and thermal), frequency, dynamic and response analysis, and optical evaluations for minimum optical deformation. The EDS I-DEAS Finite Element program and the PCFRINGE optical program are mainly used to fulfill this analysis. Image motion is also calculated based on line of sight (LOS) sensitivity equations integrated in finite element models.

  17. Application of graphical design method to beam transport system

    International Nuclear Information System (INIS)

    A graphical design method in which a partical beam with initial divergence can realize waist to waist transport in both X and Y planed simultaneously by means of quadrupole doublet is presented. Graphical mathod and transport matrix as well as charts can be used so that a quick design can be carried out to save computer time considerably. A concrete example of the beam is given to demonstrate the practical application of the theory mentioned above

  18. Operational experience with synchrotron light interferometers for CEBAF experimental beam lines

    Energy Technology Data Exchange (ETDEWEB)

    Pavel Chevtsov

    2006-10-24

    Beam size and energy spread monitoring systems based on Synchrotron Light Interferometers (SLI) have been in operations at Jefferson Lab for several years. A non-invasive nature and a very high (a few mm) resolution of SLI make these instruments valuable beam diagnostic tools for the CEBAF accelerator. This presentation describes the evolution of the Synchrotron Light Interferometer at Jefferson Lab and highlights our extensive experience in the installation and operation of the SLI for CEBAF experimental beam lines.

  19. The injection beam lines of the cryogenic storage ring (CSR)

    International Nuclear Information System (INIS)

    At the Max-Planck-Institute for Nuclear Physics in Heidelberg an electrostatic cryogenic storage ring (CSR) is under construction. The ions for the CSR will be provided by two ion sources with up to 60kV and 300 kV potential, respectively. The layout of the beamlines connecting the ion sources with the CSR is presented. They will be merged using an electrostatic deflector with an opening in the outer electrode, thereby allowing quick switching between the two ion sources. In order to determine the influence of the opening on the beam optics the deflector has been modeled and a modified transport matrix has been derived. An additional beamline element is a detachment region for the neutralization of a negative ion beam by photodetachment. The potential of the detachment region defines the precise energy of the neutral particles. Calculations of the ion beam optics using the MAD X code are described.

  20. Experimental Verification of Current Shear Design Equations for HSRC Beams

    Directory of Open Access Journals (Sweden)

    Attaullah Shah

    2012-07-01

    Full Text Available Experimental research on the shear capacity of HSRC (High Strength Reinforced Concrete beams is relatively very limited as compared to the NSRC (Normal Strength Reinforced Concrete beams. Most of the Building Codes determine the shear strength of HSRC with the help of empirical equations based on experimental work of NSRC beams and hence these equations are generally regarded as un-conservative for HSRC beams particularly at low level of longitudinal reinforcement. In this paper, 42 beams have been tested in two sets, such that in 21 beams no transverse reinforcement has been used, whereas in the remaining 21 beams, minimum transverse reinforcement has been used as per ACI-318 (American Concrete Institute provisions. Two values of compressive strength 52 and 61 MPa, three values of longitudinal steel ratio and seven values of shear span to depth ratio have been have been used. The beams were tested under concentrated load at the mid span. The results are compared with the equations proposed by different international building codes like ACI, AASHTO LRFD, EC (Euro Code, Canadian Code and Japanese Code for shear strength of HSRC beams.From comparison, it has been observed that some codes are less conservative for shear design of HSRC beams and further research is required to rationalize these equations.

  1. Analysis of different design options for the beam target of the energy amplifier demonstration facility

    International Nuclear Information System (INIS)

    A thermal fluid dynamic analysis of different design options of a high intensity proton beam target has been performed for the 80 MW Demonstration Facility of the Energy Amplifier proposed by C. Rubbia (EADF), presently under development in Italy by Ansaldo, CRS4, ENEA and INFN. The present machine is driven by a 600 MeV proton accelerator at a current varying from about 2 to 6 mA during the fuel cycle. Two options have been considered: (i) a 'windowless' design, where the free surface of the spallation material (liquid Pb-Bi eutectic) is the interface with the void of the beam transport line, and (ii) a 'window' design, where a physical separation is made by means of a 9Cr 1Mo V Nb martensitic steel hemispherical window. Both designs have advantages and drawbacks. The beam window is a delicate element whose lifetime is at present moment difficult to assess, since it is affected by the combined action of liquid metal corrosion, radiation damage (induced by protons and high energy neutrons interactions) and thermal fatigue (induced by stress cycling due to beam trips and beam interruptions). The windowless option is less sensible to radiation damage, but its design is more complex for the presence of a free surface flow and of Pb-Bi vapours in the beam pipe. (author)

  2. Beam dynamics design of the Compact Linear Collider Drive Beam injector

    International Nuclear Information System (INIS)

    In the Compact Linear Collider (CLIC) the RF power for the acceleration of the Main Beam is extracted from a high-current Drive Beam that runs parallel to the main linac. The longitudinal and transverse beam dynamics of the Drive Beam injector has been studied in detail and optimized. The injector consists of a thermionic gun followed by a bunching system, some accelerating structures, and a magnetic chicane. The bunching system contains three sub-harmonic bunchers, a prebuncher, and a traveling wave buncher all embedded in a solenoidal magnetic field. The main characteristic of the Drive Beam injector is the phase coding process done by the sub-harmonic bunching system operating at half the acceleration frequency. This process is essential for the frequency multiplication of the Drive Beam. During the phase coding process the unwanted satellite bunches are produced that adversely affects the machine power efficiency. The main challenge is to reduce the population of particles in the satellite bunches in the presence of strong space-charge forces due to the high beam current. The simulation of the beam dynamics has been carried out with PARMELA with the goal of optimizing the injector performance compared to the existing model studied for the Conceptual Design Report (CDR). The emphasis of the optimization was on decreasing the satellite population, the beam loss in the magnetic chicane and limiting the beam emittance growth in transverse plane

  3. Beam dynamics design of the Compact Linear Collider Drive Beam injector

    Energy Technology Data Exchange (ETDEWEB)

    Hajari, Sh. Sanaye, E-mail: ssanayeh@cern.ch [Institute for Research in Fundamental Sciences (IPM), School of Particles and Accelerators, P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); European Organization for Nuclear Research (CERN), BE Department, CH-1211 Geneva 23 (Switzerland); Shaker, H. [Institute for Research in Fundamental Sciences (IPM), School of Particles and Accelerators, P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); European Organization for Nuclear Research (CERN), BE Department, CH-1211 Geneva 23 (Switzerland); Doebert, S. [European Organization for Nuclear Research (CERN), BE Department, CH-1211 Geneva 23 (Switzerland)

    2015-11-01

    In the Compact Linear Collider (CLIC) the RF power for the acceleration of the Main Beam is extracted from a high-current Drive Beam that runs parallel to the main linac. The longitudinal and transverse beam dynamics of the Drive Beam injector has been studied in detail and optimized. The injector consists of a thermionic gun followed by a bunching system, some accelerating structures, and a magnetic chicane. The bunching system contains three sub-harmonic bunchers, a prebuncher, and a traveling wave buncher all embedded in a solenoidal magnetic field. The main characteristic of the Drive Beam injector is the phase coding process done by the sub-harmonic bunching system operating at half the acceleration frequency. This process is essential for the frequency multiplication of the Drive Beam. During the phase coding process the unwanted satellite bunches are produced that adversely affects the machine power efficiency. The main challenge is to reduce the population of particles in the satellite bunches in the presence of strong space-charge forces due to the high beam current. The simulation of the beam dynamics has been carried out with PARMELA with the goal of optimizing the injector performance compared to the existing model studied for the Conceptual Design Report (CDR). The emphasis of the optimization was on decreasing the satellite population, the beam loss in the magnetic chicane and limiting the beam emittance growth in transverse plane.

  4. Optimization of a constrained linear monochromator design for neutral atom beams.

    Science.gov (United States)

    Kaltenbacher, Thomas

    2016-04-01

    A focused ground state, neutral atom beam, exploiting its de Broglie wavelength by means of atom optics, is used for neutral atom microscopy imaging. Employing Fresnel zone plates as a lens for these beams is a well established microscopy technique. To date, even for favorable beam source conditions a minimal focus spot size of slightly below 1μm was reached. This limitation is essentially given by the intrinsic spectral purity of the beam in combination with the chromatic aberration of the diffraction based zone plate. Therefore, it is important to enhance the monochromaticity of the beam, enabling a higher spatial resolution, preferably below 100nm. We propose to increase the monochromaticity of a neutral atom beam by means of a so-called linear monochromator set-up - a Fresnel zone plate in combination with a pinhole aperture - in order to gain more than one order of magnitude in spatial resolution. This configuration is known in X-ray microscopy and has proven to be useful, but has not been applied to neutral atom beams. The main result of this work is optimal design parameters based on models for this linear monochromator set-up followed by a second zone plate for focusing. The optimization was performed for minimizing the focal spot size and maximizing the centre line intensity at the detector position for an atom beam simultaneously. The results presented in this work are for, but not limited to, a neutral helium atom beam. PMID:26922370

  5. Computer-based mechanical design of overhead lines

    Science.gov (United States)

    Rusinaru, D.; Bratu, C.; Dinu, R. C.; Manescu, L. G.

    2016-02-01

    Beside the performance, the safety level according to the actual standards is a compulsory condition for distribution grids’ operation. Some of the measures leading to improvement of the overhead lines reliability ask for installations’ modernization. The constraints imposed to the new lines components refer to the technical aspects as thermal stress or voltage drop, and look for economic efficiency, too. The mechanical sizing of the overhead lines is after all an optimization problem. More precisely, the task in designing of the overhead line profile is to size poles, cross-arms and stays and locate poles along a line route so that the total costs of the line's structure to be minimized and the technical and safety constraints to be fulfilled.The authors present in this paper an application for the Computer-Based Mechanical Design of the Overhead Lines and the features of the corresponding Visual Basic program, adjusted to the distribution lines. The constraints of the optimization problem are adjusted to the existing weather and loading conditions of Romania. The outputs of the software application for mechanical design of overhead lines are: the list of components chosen for the line: poles, cross-arms, stays; the list of conductor tension and forces for each pole, cross-arm and stay for different weather conditions; the line profile drawings.The main features of the mechanical overhead lines design software are interactivity, local optimization function and high-level user-interface

  6. Interleaving of beam lines inside the PS tunnel

    CERN Multimedia

    1983-01-01

    View against the direction of the proton beams. The PS ring (section 26) is on the left. The injection tunnel for LEAR leaving from here has increased the trafic in this already busy area where the two Linacs and the transfer tunnel leading to the SPS, ISR and AA join the PS ring (cf. photo 7802260, 7802261, Annual Report 1981, p. 89, fig. 12).

  7. Final design of the beam source for the MITICA injector

    Energy Technology Data Exchange (ETDEWEB)

    Marcuzzi, D., E-mail: diego.marcuzzi@igi.cnr.it; Agostinetti, P.; Dalla Palma, M.; De Muri, M.; Chitarin, G.; Gambetta, G.; Marconato, N.; Pasqualotto, R.; Pavei, M.; Pilan, N.; Rizzolo, A.; Serianni, G.; Toigo, V.; Trevisan, L.; Visentin, M.; Zaccaria, P.; Zaupa, M. [Consorzio RFX, Corso Stati Uniti, 4, I-35127 Padova (Italy); Boilson, D.; Graceffa, J.; Hemsworth, R. S. [ITER Organization, Route de Vinon-sur-Verdon, 13067 St Paul Lez Durance (France); and others

    2016-02-15

    The megavolt ITER injector and concept advancement experiment is the prototype and the test bed of the ITER heating and current drive neutral beam injectors, currently in the final design phase, in view of the installation in Padova Research on Injector Megavolt Accelerated facility in Padova, Italy. The beam source is the key component of the system, as its goal is the generation of the 1 MeV accelerated beam of deuterium or hydrogen negative ions. This paper presents the highlights of the latest developments for the finalization of the MITICA beam source design, together with a description of the most recent analyses and R&D activities carried out in support of the design.

  8. Design Study of a Superconducting Gantry for Carbon Beam Therapy

    CERN Document Server

    Kim, J

    2016-01-01

    This paper describes the design study of a gantry for a carbon beam. The designed gantry is compact such that its size is comparable to the size of the proton gantry. This is possible by introducing superconducting double helical coils for dipole magnets. The gantry optics is designed in such a way that it provides rotation-invariant optics and variable beam size as well as point-to-parallel scanning of a beam. For large-aperture magnet, three-dimensional magnetic field distribution is obtained by invoking a computer code, and a number of particles are tracked by integrating equations of motion numerically together with three-dimensional interpolation. The beam-shape distortion due to the fringe field is reduced to an acceptable level by optimizing the coil windings with the help of genetic algorithm. Higher-order transfer coefficients are calculated and shown to be reduced greatly with appropriate optimization of the coil windings.

  9. Driver beam-led EURISOL target design constraints

    CERN Document Server

    Noah, Etam; Catherall, Richard; Kadi, Yacine; Kharoua, Cyril; Lettry, Jacques

    2008-01-01

    The EURISOL (European Isotope Separation Online) Design Study is addressing new high power target design challenges. A three-step method [1] was proposed to split the high power linac proton driver beam into one $H^{-}$ branch for the 4 $MW_{b}$ [2] mercury target that produces radioactive ion beams (RIB) via spallation neutroninduced fission in a secondary actinide target and three 100 $kW_{b}$ $H^{+}$ branches for the direct targets producing RIBs via fragmentation and spallation reactions. This scheme minimises transient thermo-mechanical stresses on targets and preserves the cw nature of the driver beam in the four branches. The heat load for oxides, carbides, refractory metal foils and liquid metals is driven by the incident proton driver beam while for actinides, exothermic fission reactions are an additional contribution. This paper discusses the constraints that are specific to each class of material and the target design strategies.

  10. Computer control of 500 MeV beam transport line at KEK, (3)

    International Nuclear Information System (INIS)

    Tests for computer control of 500 MeV beam transport line of KEK proton synchrotron were done. Analog data of the beam transport magnets are taken by the satellite computer S-2, and the magnet currents are adjusted by the pulse train outputs from this computer. Data from profile monitors are taken by the satellite computer S-0 through a high-speed process input/output controller. These data are displayed on a graphic display terminal, and can see conditions of the beam transport line on the screen and adjust the magnet current by typing in the value to be set. (author)

  11. Beam lines from Linac 1 and Linac 2 to the Booster

    CERN Multimedia

    1978-01-01

    View against the direction of the beams. Both Linacs are behind the concrete wall at the back of the picture. The 50 MeV proton beam from Linac 1 enters the PS tunnel through the hole at left. The line from Linac 2, in the process of being installed, comes from the hole at right. The lines converge at a switching magnet (prominently in the foreground), which selects which of the 2 beams to send on to the Booster. See also 7802261 and further explanations there.

  12. Evaluation of the optical layout of EXAFS beam-line at Indus-2 SRS by divergent laser beam

    International Nuclear Information System (INIS)

    An extended x-ray absorption fine structure (EXAFS) beam line for x-ray absorption studies using energy dispersive geometry and position sensitive detector is being developed for the INDUS-2 synchrotron source. The beamline would use an elliptically bent Si(111) crystal for dispersion and horizontal focusing of the synchrotron beam. A vertically focusing mirror would be used prior to the bent crystal for vertical focusing of the synchrotron beam as well as for higher harmonic rejection from the spectra. The optical layout of the beamline has been evaluated by numerical simulation using the ray tracing programme 'SHADOW' and the layout has also been tested experimentally using a divergent laser beam. (author)

  13. Crossed Beam Energy Transfer in the NIF ICF Target Design

    International Nuclear Information System (INIS)

    In the National Ignition Facility (NIF) ICF point design, the cylindrical hohlraum target is illuminated by multiple laser beams through two laser entrance holes on the ends. According to simulations by LASNEX and HYDRA plasma created inside the hohlraum will stream out of the LEH, accelerate to supersonic speeds and then fan out radially. Inside the hohlraum, flows are subsonic. Forward Brillouin scattering can transfer energy between pairs of laser beams (0 and 1) if the following frequency matching condition is satisfied: ω0 - ω1 = (k0 - k1) · V + |k0 - k1| cs (1) where ω0.1 and k0.1 are the frequencies and wave-numbers of the two laser beams, V is the plasma flow velocity and cs is the local ion sound speed. In the nominal case of equal frequency beams, this requires the component of the plasma flow velocity transverse to the bisector of the beam directions to be sonic, with the resulting transfer being to the downstream beam. In the NIF beam geometry, this is from the outer to inner cones of beams. The physics of this transfer is the same as in beam bending; the difference being that in the case of beam bending the effect is to redistribute power to the downstream side of the single beam. Were significant power transfer to occur in the point design, the delicately tuned implosion symmetry would be spoiled. To directly compensate for the transfer, the incident beam powers would have to be adjusted. The greatest vulnerability in the point design thus occurs at 15.2ns, when the inner beams are at their peak power and are at their nominal design power limit. In this situation, some other means of symmetry control would be required, such as re-pointing. At 15.2ns, the envelope focal intensities of the outer and inner beams are approximately 1015 and 6.7 1014 W/cm2 respectively. There is little absorption or diffractive spreading of the beams in the crossing region, so these intensities are also representative there. The outer beams are at higher intensity

  14. Optimum steering of photon beam lines in SPEAR

    International Nuclear Information System (INIS)

    A common operational requirement for many synchrotron light sources is to maintain steered photon beamlines with minimum corrector strength values. To solve this problem for SPEAR, the authors employed the Singular Value Decomposition (SVD) matrix-inversion technique to minimize corrector strengths while constraining the photon beamlines to remain on target. The result was a reduction in corrector strengths, yielding increased overhead for the photon-beam position feedback systems

  15. Experimental determination of beam loss point in transport line-2 of Indus Accelerator Complex

    International Nuclear Information System (INIS)

    Radiation field in the Indus-1 SRS Experimental hall during 550 MeV electron beam injection into Transport Line-3 (TL-3)/Indus-2 was found to be higher than during 450 MeV beam injection to Transport line -2 (TL-2)/Indus-1. Experimental investigation was carried out to find out the location of beam loss. For the investigation, Ion chamber based detectors viz direct reading dosimeters (passive detectors) and beam loss monitors (active) were used. The beam loss point was observed near Sputter Ion Pump-5 (SIP-5) of TL-2, in Indus-1 area. The result was confirmed by induced activity profile measurements of the transport lines (TL-2/TL-3) during shut down. In order to reduce the radiation level in Indus-1 hall, two tenth value layers of lead shielding was put near TL2. Later on, correction in the beam optics by beam dynamics section reduced the beam losses at SIP-5 location, thereby reducing the radiation fields in Indus-1 hall substantially. The paper describes the measurement and the results in detail. (author)

  16. Dual exposure (e-beam and i-line) of OCG-895i resist

    Science.gov (United States)

    Bojko, Richard J.; Pugh, Graham M.

    1993-06-01

    A process is described in which OCG-895i resist is exposed using both e-beam and i-line optical exposures. This dual exposure allows efficient writing of patterns requiring both fine geometries and large areas in a single lithographic layer. The unique aspect of this process is that the two exposure methods use completely independent developers. This allows the optical exposures to be aligned directly to the e-beam exposed resist, eliminating the need for 'zero- level' alignment marks. E-beam features as small as 200 nm lines and spaces, connected by large photo-exposed pads, have been fabricated. The process presented here results in e-beam contrast of 4.8, with insignificant unexposed film loss. The photo-exposure characteristics are unchanged by the e-beam exposure and develop process. The application of this process to the fabrication of surface acoustic wave devices is discussed.

  17. Final design of kaon beam K2 at KEK

    International Nuclear Information System (INIS)

    Final design of the 2.3 GeV/c kaon beam K2 is given. The K2 beam starts from the production target in slow extracted beam. Momentum range is 1 GeV/c through 2.3 GeV/c. Nominal total beam length is 27.9 m and solid-angle momentum acceptance is 6.25 msr%ΔP/P. Using a platinum target of diameter 3 mm and length 6 cm, 2.0 GeV/c beam fluxes of 1.0 x 106 K+ and 5.2 x 105 K- per 1012 13 GeV/c incident protons are expected at the final focus. (auth.)

  18. Chemical investigations of isotope separation on line target units for carbon and nitrogen beams

    CERN Document Server

    Franberg, H; Gäggeler, H W; Köster, U

    2006-01-01

    Radioactive ion beams (RIBs) are of significant interest in a number of applications. Isotope separation on line (ISOL) facilities provide RIB with high beam intensities and good beam quality. An atom that is produced within the ISOL target will first diffuse out from the target material. During the effusion towards the transfer line and into the ion source the many contacts with the surrounding surfaces may cause unacceptable delays in the transport and, hence, losses of the shorter-lived isotopes. We performed systematic chemical investigations of adsorption in a temperature and concentration regime relevant for ISOL targets and ion source units, with regard to CO/sub x/ and NOmaterials are potential construction materials for the above-mentioned areas. Off-line and on-line tests have been performed using a gas thermochromatography setup with radioactive tracers. The experiments were performed at the production of tracers for atmospheric chemistry (PROTRAC) facility at the Paul Schener Institute in Villigen...

  19. Preliminary design of the advanced quantum beam source

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Byung Cheol; Lee, Jong Min; Jeong, Young Uk; Cho, Sung Oh; Yoo, Jae Gwon; Park, Seong Hee

    2000-07-01

    The preliminary design of the advanced quantum beam source based on a superconducting electron accelerator is presented. The advanced quantum beams include: high power free electron lasers, monochromatic X-rays and {gamma}-rays, high-power medium-energy electrons, high-flux pulsed neutrons, and high-flux monochromatic slow positron beam. The AQBS system is being re-designed, assuming that the SPS superconducting RF cavities used for LEP at CERN will revived as a main accelerator of the AQBS system at KAERI, after the decommissioning of LEP at the end of 2000. Technical issues of using the SPS superconducting RF cavities for the AQBS project are discussed in this report. The advanced quantum beams will be used for advanced researches in science and industries.

  20. A button - type beam position monitor design for TARLA facility

    Science.gov (United States)

    Gündoǧan, M. Tural; Kaya, ć.; Yavaş, Ö.

    2016-03-01

    Turkish Accelerator and Radiation Laboratory in Ankara (TARLA) facility is proposed as an IR FEL and Bremsstrahlung facility as the first facility of Turkish Accelerator Center (TAC). TARLA is essentially proposed to generate oscillator mode FEL in 3-250 microns wavelengths range, will consist of normal conducting injector system with 250 keV beam energy, two superconducting RF accelerating modules in order to accelerate the beam 15-40 MeV. The TARLA facility is expected to provide two modes, Continuous wave (CW) and pulsed mode. Longitudinal electron bunch length will be changed between 1 and 10 ps. The bunch charge will be limited by 77pC. The design of the Button-type Beam Position Monitor for TARLA IR FEL is studied to operate in 1.3 GHz. Mechanical antenna design and simulations are completed considering electron beam parameters of TARLA. Ansoft HFSS and CST Particle Studio is used to compare with results of simulations.

  1. Preliminary design of the advanced quantum beam source

    International Nuclear Information System (INIS)

    The preliminary design of the advanced quantum beam source based on a superconducting electron accelerator is presented. The advanced quantum beams include: high power free electron lasers, monochromatic X-rays and γ-rays, high-power medium-energy electrons, high-flux pulsed neutrons, and high-flux monochromatic slow positron beam. The AQBS system is being re-designed, assuming that the SPS superconducting RF cavities used for LEP at CERN will revived as a main accelerator of the AQBS system at KAERI, after the decommissioning of LEP at the end of 2000. Technical issues of using the SPS superconducting RF cavities for the AQBS project are discussed in this report. The advanced quantum beams will be used for advanced researches in science and industries

  2. A standardized method for beam design in neutron capture therapy

    International Nuclear Information System (INIS)

    A desirable end point for a given beam design for Neutron Capture Therapy (NCT) should be quantitative description of tumour control probability and normal tissue damage. Achieving this goal will ultimately rely on data from NCT human clinical trials. Traditional descriptions of beam designs have used a variety of assessment methods to quantify proposed or installed beam designs. These methods include measurement and calculation of open-quotes free fieldclose quotes parameters, such as neutron and gamma flux intensities and energy spectra, and figures-of-merit in tissue equivalent phantoms. The authors propose here a standardized method for beam design in NCT. This method would allow all proposed and existing NCT beam facilities to be compared equally. The traditional approach to determining a quantitative description of tumour control probability and normal tissue damage in NCT research may be described by the following path: Beam design → dosimetry → macroscopic effects → microscopic effects. Methods exist that allow neutron and gamma fluxes and energy dependence to be calculated and measured to good accuracy. By using this information and intermediate dosimetric quantities such as kerma factors for neutrons and gammas, macroscopic effect (absorbed dose) in geometries of tissue or tissue-equivalent materials can be calculated. After this stage, for NCT the data begins to become more sparse and in some areas ambiguous. Uncertainties in the Relative Biological Effectiveness (RBE) of some NCT dose components means that beam designs based on assumptions considered valid a few years ago may have to be reassessed. A standard method is therefore useful for comparing different NCT facilities

  3. Design for maximum band-gaps in beam structures

    DEFF Research Database (Denmark)

    Olhoff, Niels; Niu, Bin; Cheng, Gengdong

    2012-01-01

    This paper aims to extend earlier optimum design results for transversely vibrating Bernoulli-Euler beams by determining new optimum band-gap beam structures for (i) different combinations of classical boundary conditions, (ii) much larger values of the orders n and n-1 of adjacent upper and lower...... eigenfrequencies of maximized band-gaps, and (iii) different values of a minimum cross-sectional area constraint. The periodicity of the optimum beams and the attenuation of their band-gaps are also discussed....

  4. Design and development of DCCT for measurement of beam current

    International Nuclear Information System (INIS)

    Charged Particle beams in accelerators need measurement of beam current during operations and diagnostics. The beam passes through a resonant cavity that is excited at a fixed resonant frequency and is maintained at a vacuum level as high as 10E-8 Ton. Non-intrusive method is needed for beam current measurement. DCCT is a non-intrusive, accurate and stable device that is widely used for measurement of the beam intensity in particle accelerators. DCCT is based on principle of flux gate magnetometers. It consists of magnetic modulator, magnetizing coils, sense coils, back end and front end electronics. A prototype DCCT for vacuum chamber of 24 mm nominal inner diameter is designed and developed at CnID. During laboratory experiments beam current is simulated by passing DC current generated by stable current source along the axis of the DCCT. In absence of beam current sense coils senses zero voltage. Even harmonics are generated at the output winding when DC current is passed and the magnitude of the 2nd harmonic gives the corresponding value of the beam current. The prototype DCCT is designed for 0.5 mA to 10 mA range with resolution better than 0.1 mA. This paper describes the magnetic, electronics and mechanical design of the prototype DCCT which is optimized for amplitude and frequency of magnetizing current. The dependence of the amplitude and frequency of the magnetizing current on the second harmonic is discussed in detail. Shielding to external noise is provided with help of high permeability soft magnetic material. A compensation core with coil is used to determine the direction/charge of the beam. The current in this coil is tuned to reduce the 2nd harmonics generated due to beam current, back to zero. The value of this current gives magnitude of the beam current and its polarity gives information on direction/charge of the beam. Front and back end electronics designed for prototype DCCT is also discussed. It is planned to deploy the developed DCCT in Linac

  5. A variable high-power multi-beam klystron design

    International Nuclear Information System (INIS)

    We describe here a 1.497 GHz multi-beam klystron with up to 13 kW of continuous output power, greater than 60% efficiency, and stable linear operation at ∼10% below saturation, whose design is based on direct extrapolation from klystrons operating in our electron accelerators. The beam perveance is individually adjusted with a zero-current control-electrode gun to match the parameters of a specific application, such as superconducting accelerating structures. The 18 beams are guided through six toroidal cavities, five operating at the fundamental and one at the 2nd harmonic, by a reverse periodic permanent magnet focusing system

  6. Using the particle beam optics lab. (PBO LABtm) for beamline design and analysis

    International Nuclear Information System (INIS)

    The Particle Beam Optics Interactive Computer Laboratory (PBO Lab) represents a new approach to providing software for particle beam optics modeling. The PBO Lab includes four key elements: a graphic user interface shell; a graphic beamline construction kit for users to interactively and visually construct optical beam lines; a knowledge database on the physics and technology of optical elements, and various charged particle optics computational engines. A first-order matrix code, including a space charge model, can be used to produce scaled images of beamlines together with overlays of single trajectories and beam envelopes. The qualitative results of graphically sliding beamline components, or adjusting bend angles, can be explored interactively. Quantitative computational engines currently include the third-order TRANSPORT code and the multi-particle ray tracing program TURTLE. The use of the PBO Lab for designing and analyzing a second order achromatic bend is illustrated with the Windows 95/NT version of the software. (authors)

  7. Beam Dynamics Studies for the Fault Tolerance Assessment of the PDS-XADS Linac Design

    International Nuclear Information System (INIS)

    In order to meet the high availability/reliability required by the PDS-XADS design, the accelerator needs to implement to the maximum possible extent a fault tolerance strategy that would allow beam operation in the presence of most of the envisaged faults that could occur in its beam line components. In this work, we report the results of beam dynamics simulations performed to characterize the effects of the faults of the main linac components (cavities and focusing magnets) on the beam parameters. The outcome of this activity is the definition of the possible corrective actions that could be conceived (and implemented in the system) in order to guarantee the fault tolerance characteristics of the accelerator. This work has been supported by the PDS-XADS program, funded by the EU 5th Framework Program under contract FIKW-CT-2001-00179

  8. Experimental investigation of synchrotron and Bremsstrahlung hazards at lithography beam line of Indus-2 SRS

    International Nuclear Information System (INIS)

    Radiation hazard at synchrotron radiation (SR) beam lines of Indus-2 Synchrotron Radiation Source (SRS) consists of synchrotron radiation (SR) and Bremsstrahlung radiation (BR). These hazards were quantified experimentally in Lithography beam line (BL-07) of Indus-2 SRS. Measurement was performed during the initial trial operation of the beam line. Transmission of SR through the beam line was optimized by providing bump to the electron beam, prior to the measurement. Thin window ion chamber was used for the SR measurement in the direct beam. Ion current obtained is converted to exposure rate using a calibration factor obtained w.r.t. 60Co source. Copper absorber of 6 mm thick was used for eliminating SR contribution during BR dose measurement. The exposure rates obtained are 3.83E05 R/h-mA and 0.042 R/h-mA for SR and BR respectively. Energy of Bremsstrahlung radiation was also experimentally evaluated using attenuation technique. Details of these measurement and results are presented in this paper. (author)

  9. Advanced Design of the First Quasi-optical Transmission Line for ECRH at TJ-II

    International Nuclear Information System (INIS)

    TJ-II plasma start-up and heating are made by electron cyclotron resonance waves at the second harmonic of the electron cyclotron frequency. The microwave power of the gyrotrons is transmitted by two quasi-optical transmission lines. The first line launches the microwave power under fixed injection geometry, i. e. there is no a possibility to change the launching angle the wave polarization. Due to the long distance between the last focusing mirror and the center TJ-II vessel the beam is quite wide at plasma border. The second line has a moveable mirror installed inside the TJ-II vessel. To get high absorption efficiency and a narrow energy deposition profile the internal mirror focuses the wave beam at plasma center. The beam width is about 2 cm. To get more flexibility in experiments on heating and current drive the first transmission line needs to be upgraded. The designs is presented in this report. It includes and internal mirror to focus the beam and to change the injection angle. A polarizer consisting in two corrugated mirrors will be incorporated to get any wave polarization. Two mirrors with an array of coupling holes and calorimetric measurements of the energy absorbed in the barrier window will permit the estimation of the microwave power launched the TJ-II. (Author) 13 refs

  10. SUPERCONDUCTING MAGNET SYSTEM AT THE 50 GEV PROTON BEAM LINE FOR THE J-PARC NEUTRINO EXPERIMENT.

    Energy Technology Data Exchange (ETDEWEB)

    WANDERER,P.; ET AL.

    2003-06-15

    A neutrino oscillation experiment using the J-PARC SO GeV 0.75 MW proton beam is planned as a successor to the K2K project currently being operated at KEK. A superconducting magnet system is required for the arc section of the primary proton beam line to be within the space available at the site. A system with 28 combined function magnets is proposed to simplify the system and optimize the cost. The required fields for the magnets are 2.6 T dipole and 19 T/m quadrupole. The magnets are also required to have a large aperture, 173.4 mm diameter, to accommodate the large beam emittance. The magnets will be protected by cold diodes and cooled by forced flow supercritical helium produced by a 4.5 K, 2 {approx} 2.5 kW refrigerator. This paper reports the system overview and the design status.

  11. High-Brightness Beams from a Light Source Injector The Advanced Photon Source Low-Energy Undulator Test Line Linac

    CERN Document Server

    Travish, G; Borland, M; Hahne, M; Harkay, K C; Lewellen, J W; Lumpkin, Alex H; Milton, S V; Sereno, N S

    2000-01-01

    The use of existing linacs, and in particular light source injectors, for free-electron laser (FEL) experiments is becoming more common due to the desire to test FELs at ever shorter wavelengths. The high-brightness, high-current beams required by high-gain FELs impose technical specifications that most existing linacs were not designed to meet. Moreover, the need for specialized diagnostics, especially shot-to-shot data acquisition, demands substantial modification and upgrade of conventional linacs. Improvements have been made to the Advanced Photon Source (APS) injector linac in order to produce and characterize high-brightness beams. Specifically, effort has been directed at generating beams suitable for use in the low-energy undulator test line (LEUTL) FEL in support of fourth-generation light source research. The enhancements to the linac technical and diagnostic capabilities that allowed for self-amplified spontaneous emission (SASE) operation of the FEL at 530 nm are described. Recent results, includi...

  12. Conceptual design for the ZEPHYR neutral-beam injection system

    International Nuclear Information System (INIS)

    In June 1980, the Lawrence Berkeley Laboratory began a conceptual design study for a neutral beam injection system for the ZEPHYR ignition tokamak proposed by the Max-Planck-Institut fur Plasmaphysik in Garching, Germany. The ZEPHYR project was cancelled, and the LBL design effort concluded prematurely in January 1981. This report describes the conceptual design as it existed at that time, and gives brief consideration to a schedule, but does not deal with costs

  13. C. Petrone et al.: "Magnetic measurement of the model magnet QD0 designed for the CLIC final focus beam transport line." CERN TE-MSC Internal Note, EDMS Nr: 1184196

    CERN Document Server

    Arpaia, Pasquale; Petrone, Carlo; Russenschuck, Stephan; Walckiers, Louis

    2012-01-01

    This note presents the results of the magnetic measurements performed on QD0, model magnet for the final focus transport line for CLIC (Fig. 1). This high-gradient, hybrid quadrupole has a yoke length of 0.1 m and an aperture of 8.3 mm. ND2Fe14B Permanent magnet blocks provide a gradient of 150 T/m, which can be further increased to 530 T/m when the four coils are excited to 18.3 A. The request was to measure the strength of the field and the multipole coefficients at different currents. The measurement of the field strength, by means of the single stretched wire system, was done in December 2011 in the I8 laboratory. The measurement of the multipole was done by means of the oscillating wire system [1][2].

  14. Status of the SPES-charge breeder (SPES-CB) and its beam line at INFN-LNL

    Science.gov (United States)

    Galatá, Àlessio; Comunian, M.; Bellan, L.; Maggiore, M.; Patti, G.; Roncolato, C.; Bisoffi, G.; Russo, A. D.; Calabretta, L.; Angot, J.; Lamy, T.

    2016-06-01

    The Selective Production of Exotic Species (SPES) facility is under construction at INFN-LNL: aim of this project is the production, ionization and post-acceleration of radioactive ions to perform forefront research in nuclear physics. Radioactive species will be produced by fissions induced by a proton beam impinging on an UCx target: the proton beam will be delivered by a room temperature cyclotron (built by the Best Company) with a maximum energy of 40 MeV and 0.25 mA of maximum current. The radioactive species produced in the Target-Ion-Source system, extracted as a 1+ beam, cooled in a RFQ-cooler and purified from the isobars contaminants through a High Resolution Mass Spectrometer (HRMS). In order to allow post acceleration with the superconducting linac ALPI at INFN-LNL (up to 10 MeV/A for A/q = 7), an ECR-based charge breeding technique (ECR-CB) was chosen: in particular the SPES-CB was developed by the LPSC Grenoble on the basis of the Phoenix booster. The SPES-CB will be equipped with a complete test bench, totally integrated with the SPES beam line: in particular, in order to avoid beam contaminations induced by the impurities present inside the SPES-CB, and to have high transmission for a beam of very low intensity, special attention was paid not only to the transport efficiency but also to the resolution of the spectrometer downstream the charge breeder, with the design of a Medium Resolution Mass Spectrometer (MRMS). In the following paper the technical aspects connected with SPES-CB, its beam line and the transport of highly charged radioactive ions will be described.

  15. Design, fabrication, and beam commissioning of a continuous-wave four-rod rf quadrupole

    Science.gov (United States)

    Yin, X. J.; Yuan, Y. J.; Xia, J. W.; He, Y.; Zhao, H. W.; Zhang, X. H.; Du, H.; Li, Z. S.; Li, X. N.; Jiang, P. Y.; Yang, Y. Q.; Ma, L. Z.; Wu, J. X.; Xu, Z.; Sun, L. T.; Zhang, W.; Zhang, X. Z.; Meng, J.; Zhou, Z. Z.; Yao, Q. G.; Cai, G. Z.; Lu, W.; Wang, H. N.; Chen, W. J.; Zhang, Y.; Xu, X. W.; Xie, W. J.; Lu, Y. R.; Zhu, K.; Liu, G.; Yan, X. Q.; Gao, S. L.; Wang, Z.; Chen, J. E.

    2016-01-01

    A new heavy-ion linac within a continuous-wave (CW) 4-rod radio-frequency quadrupole (RFQ) was designed and constructed as the injector for the separated-sector cyclotron (SSC) at the Heavy Ion Research Facility at Lanzhou (HIRFL). In this paper, we present the development of and the beam commissioning results for the 53.667 MHz CW RFQ. In the beam dynamics design, the transverse phase advance at zero current, σ0 ⊥ , is maintained at a relatively high level compared with the longitudinal phase advance (σ0 ∥ ) to avoid parametric resonance. A quasi-equipartitioning design strategy was applied to control the emittance growth and beam loss. The installation error of the electrodes was checked using a FARO 3D measurement arm during the manufacturing procedure. This method represents a new approach to measuring the position shifts of electrodes in a laboratory environment and provides information regarding the manufacturing quality. The experimental results of rf measurements exhibited general agreement with the simulation results obtained using CST code. During on-line beam testing of the RFQ, two kinds of ion beams (40Ar 8 + and 16O5+ ) were transported and accelerated to 142.8 keV /u , respectively. These results demonstrate that the SSC-Linac has made a significant progress. And the design scheme and technology experiences developed in this work can be applied to other future CW RFQs.

  16. Damping of bending waves in truss beams by electrical transmission lines with PZT actuators

    Energy Technology Data Exchange (ETDEWEB)

    dell`Isola, F.; Vidoli, S. [Univ. di Roma `La Sapienza` (Italy). Dipt. di Ingegneria Strutturale e Geotecnica

    1998-11-01

    A new device to damp mechanical waves in modular truss beams has been proposed. It is based on the electro-mechanical coupling of the truss beam with an electrical transmission line by a line distribution of PZT actuators. It has been proved that extensional and torsional waves can be damped using a standard second-order transmission line, and that such a line is not suitable to damp bending waves. In the present paper, we propose to couple the beam with a fourth-order transmission line, obtained from the standard one by adding a voltage-driven current generator, thus electrically paralleling the structure of the bending wave equation. As a detailed description of the system would require huge numerical programming, to test qualitatively the efficiency of the proposed electro-mechanical coupling we consider a coarse continuum model of piezoelectro-mechanical (PEM) beams, using an identification procedure based on the principle of virtual power. We define the critical value for line impedance maximizing the electro-mechanical energy exchange for every wave frequency, thus proving that the electric damping of bending waves by distributed PZT control is technically feasible. (orig.) With 10 figs., 1 tab., 10 refs.

  17. In vacuum diamond sensor scanner for beam halo measurements in the beam line at the KEK Accelerator Test Facility

    CERN Document Server

    Liu, Shan; Cornebise, Patrick; Faus-Golfe, Angeles; Fuster-Martínez, Nuria; Griesmayer, Erich; Guler, Hayg; Kubytskyi, Viacheslav; Sylvia, Christophe; Toshiaki, Tauchi; Terunuma, Nobuhiro; Bambade, Philip

    2015-01-01

    The investigation of beam halo transverse distributions is important for the understanding of beam losses and the control of backgrounds in Future Linear Colliders (FLC). A novel in vacuum diamond sensor (DSv) scanner with four strips has been designed and developed for the investigation of the beam halo transverse distributions and also for the diagnostics of Compton recoil electrons after the interaction point (IP) of ATF2, a low energy (1.3 GeV) prototype of the final focus system for the ILC and CLIC linear collider projects. Using the DSv, a dynamic range of $\\sim10^6$ has been successfully demonstrated and confirmed for the first time by simultaneous beam core ($\\sim10^9$ electrons) and beam halo ($\\sim10^3$ electrons) measurements at ATF2. This report presents the characterization, performance studies and tests of the diamond sensors using an $\\alpha$ source as well as using the electron beams at PHIL, a low energy ($< 10$ MeV) photo-injector at LAL, and at ATF2. First beam halo measurement results ...

  18. Concept design of a radioactive ion beam thick target

    International Nuclear Information System (INIS)

    The concept design procedure of a thick target used in generating Radioactive Ion Beams (RIBs) is described. The harsh terms of target material and temperature condition for this purpose are discussed, and several kinds of candidate target materials are listed. Design of a carbon target matrix and its water cooling heat-sink system, and calculation of three-dimensional temperature distributions of the target system are given. The result shows that the thick target has a capacity to receive proton beam of power up to 14 kW, meanwhile its temperature can be maintained at 1300∼2000 degree C. (3 refs., 6 figs.)

  19. Design of a Push-Broom Multi-Beam Radiometer for Future Ocean Observations

    DEFF Research Database (Denmark)

    Cappellin, C.; Pontoppidan, K.; Nielsen, P. H.;

    2015-01-01

    The design of a push-broom multi-beam radiometer for future ocean observations is described. The radiometer provides a sensitivity one order of magnitude higher than a traditional conical scanning radiometer, and has the big advantage of being fully stationary relative to the satellite platform....... Thanks to a dense focal plane array and a dedicated optimization procedure, the instrument can accurately measure in C, X and Ku band and as close as 15 km to the coast line....

  20. Design study of low-energy beam transport for multi-charge beams at RAON

    Science.gov (United States)

    Bahng, Jungbae; Qiang, Ji; Kim, Eun-San

    2015-12-01

    The Rare isotope Accelerator Of Newness (RAON) at the Rare Isotope Science Project (RISP) is being designed to simultaneously accelerate beams with multiple charge states. It includes a driver superconducting (SC) linac for producing 200 MeV/u and 400 kW continuous wave (CW) heavy ion beams from protons to uranium. The RAON consists of a few electron cyclotron resonance ion sources, a low-energy beam transport (LEBT) system, a CW 81.25 MHz, 500 keV/u radio frequency quadrupole (RFQ) accelerator, a medium-energy beam transport system, the SC linac, and a charge-stripper system. The LEBT system for the RISP accelerator facility consists of a high-voltage platform, two 90° dipoles, a multi-harmonic buncher (MHB), solenoids, electrostatic quadrupoles, a velocity equalizer, and a diagnostic system. The ECR ion sources are located on a high-voltage platform to reach an initial beam energy of 10 keV/u. After extraction, the ion beam is transported through the LEBT system to the RFQ accelerator. The generated charge states are selected by an achromatic bending system and then bunched by the MHB in the LEBT system. The MHB is used to achieve a small longitudinal emittance in the RFQ by generating a sawtooth wave with three harmonics. In this paper, we present the results and issues of the beam dynamics of the LEBT system.

  1. European contributions to the beam source design and R and D of the ITER neutral beam injectors

    International Nuclear Information System (INIS)

    The paper reports on the progress made by the European Home Team in strong interaction with the ITER JCT and JAERI regarding several key aspects of the beam source for the ITER injectors: integration of the SINGAP accelerator into the ITER injector design. This is a substantially simpler concept than the MAMuG accelerator of the ITER NBI 'reference design', which has potential for significant cost savings, and which avoids some of the weaknesses of the reference design such as the need for intermediate high voltage potentials from the HV power supply and pressurised gas insulation; high energy negative ion acceleration using a SINGAP accelerator; long pulse (i.e. >1000 s) negative ion source operation in deuterium; RF source development, which could reduce the scheduled maintenance of the ITER injectors (as it uses no filaments), and simplify the transmission line and the auxiliary power supplies for the ion source. (author)

  2. High power coatings for line beam laser optics of up to 2-meter in length

    Science.gov (United States)

    Mende, Mathias; Kohlhaas, Jürgen; Ebert, Wolfgang

    2016-03-01

    Laser material processing plays an important role in the fabrication of the crucial parts for state-of-the-art smartphones and tablets. With industrial line beam systems a line shaped beam with a length above one meter and an average power of several thousand watts can be realized. To ensure excellent long axis beam homogeneity, demanding specifications regarding the substrate surface form tolerances and the coating uniformity have to be achieved for each line beam optic. In addition, a high laser damage threshold and a low defect density are required for the coatings. In order to meet these requirements, the MAXIMA ion beam sputtering machine was developed and built by LASEROPTIK. This contribution describes the functional principle of MAXIMA deposition machine, which adapts the ion beam sputtering technology with its highest coating quality to the field of large area deposition. Furthermore, recent developments regarding the process control by optical broadband monitoring are discussed. Finally experimental results on different thin film characteristics as for example the coating uniformity, the microstructure and the laser damage resistance of multilayers are presented.

  3. Successful beam test of the SPS-to-LHC transfer line TI2

    CERN Multimedia

    2007-01-01

    Image of the first beam spot on the last BTV screen traversed by the beam during the TI 2 test.At 12:03:47 on 28 October a beam passed down the 2.7 km of the new SPS-to-LHC transfer line TI 2 at the first attempt, to within some 50 m of the LHC tunnel. After initial tuning, a range of measurements was carried out with a low intensity proton beam and preliminary analyses look good. After the test, no increase in radiation levels was found in either the LHC or ALICE, and the zones were rapidly opened again for access. As from next year TI 2 will regularly transport a beam from the SPS to the LHC injection point of Ring 1, near Point 2 (ALICE). The TI 8 transfer line, which will bring particles from the SPS to the injection point in Ring 2, near Point 8 (LHCb), was commissioned successfully with low intensity beam in 2004. The two LHC injection lines have a combined length of 5.6 km and comprise some seven hundred warm magnets. While a...

  4. Electron beam dynamics and design of electron beam ion-charge breeding source

    International Nuclear Information System (INIS)

    There is a requirement to develop an electron beam ion-charge breeding source (EBIBS) to produce a highly charged and highly pure ion beam of common elements as well as rare isotopes. The EBIBS consists of an electron gun chamber, the main solenoid and ionization chamber and an electron collector chamber for attaining highly charged and pure ion beam of species. Some studies have been performed to reach appropriate design of the proposed source, The report explains certain design choices and constraints involved in developing the EBIBS. Trajectory simulation of electron beams in >5A range current has been done to determine the configuration of electrodes and magnet coils appropriate to obtain high current density electron pencil beam at the ionization region in high magnetic field of the superconducting solenoid. The electron beam starts from the high pervious electron gun and dumped on the water cooled electron collector. The background pressure in the trap region should be low enough that one does not produce a significant number of ions from the background gas. An impurity value of the order of ∼5% can be tolerated, so an acceptable range of vacuum in EBIBS, 10-10 - 10-12 mbar, is assumed. Physics design of high perveance electron gun, superconducting solenoid ionization region and the electron collector has been done and is under further study to achieve superior design of the source, The mechanical design of various components and the source bench has been started also. All these developments will be presented in the conference. (author)

  5. Simulation and measurement of the electrostatic beam kicker in the low-energy undulator test line

    International Nuclear Information System (INIS)

    An electrostatic kicker has been constructed for use in the Low-Energy Undulator Test Line (LEUTL) at the Advanced Photon Source (APS). The function of the kicker is to limit the amount of beam current to be accelerated by the APS linac. Two electrodes within the kicker create an electric field that adjusts the trajectory of the beam. This paper will explore the static fields that are set up between the offset electrode plates and determine the reaction of the beam to this field. The kicker was numerically simulated using the electromagnetic solver package MAFIA [1

  6. Accelerator and detector physics at the Bern medical cyclotron and its beam transport line

    Directory of Open Access Journals (Sweden)

    Auger Martin

    2016-03-01

    Full Text Available The cyclotron laboratory for radioisotope production and multi-disciplinary research at the Bern University Hospital (Inselspital is based on an 18-MeV proton accelerator, equipped with a specifically conceived 6-m long external beam line, ending in a separate bunker. This facility allows performing daily positron emission tomography (PET radioisotope production and research activities running in parallel. Some of the latest developments on accelerator and detector physics are reported. They encompass novel detectors for beam monitoring and studies of low current beams.

  7. Development of a low-energy, high-brightness $\\mu^+$ beam line

    CERN Document Server

    Eggenberger, A; Wichmann, G

    2016-01-01

    We are developing a beam line which compresses the phase space of a standard surface $\\mu^+$ beam by 10 orders of magnitude with an efficiency of $10^{-3}$. Phase space compression occurs in a He gas target and consists of three consecutive stages: Transverse (perpendicular to the beam axis) compression, longitudinal compression and re-extraction into vacuum. Transverse compression was observed for the first time and longitudinal compression has been measured to occur within 2.5 $\\mu$s with high efficiency.

  8. Off-Line Programming System of Multi-Axis Platform for Dual Beam Laser Welding

    Science.gov (United States)

    Yang, Jian-Zhong; Zhang, Yan; Chen, Ji-Hong; Wang, Wei-Qiang; Liu, Yi

    The multi-axis platform of dual beam laser welding (DBLW) can guarantee a good synchronism on double sides, adaptation and precision, thus it can be widely applied. On this platform, this paper studies critical technology of off-line programming of DBLW. It presents a U-oriented on double sides trajectory planning method based on the traditional method derived from single beam laser welding. Then a calibration strategy of structural parameters is rendered and G codes are produced by a postprocessor. At last the researchers develops the off-line programming system on CAM platforms and a simulation conducted proves the system satisfying the need.

  9. LCLS Spontaneous Radiation with Reflection along the Beam Line in the Undulator Pipes

    Energy Technology Data Exchange (ETDEWEB)

    2010-12-07

    Monte Carlo simulations of the spontaneous radiation at low and high energies up to the Near Experimental Hall entrance yield beam widths for use in the design of transport and diagnostic instruments in the Front End Enclosure.

  10. Preliminary design of the beam screen cooling for the Future Circular Collider of hadron beams

    CERN Document Server

    Kotnig, C

    2015-01-01

    Following recommendations of the recent update of the European strategy in particle physics, CERN has undertaken an international study of possible future circular colliders beyond the LHC. This study considers an option for a very high energy (100 TeV) hadron-hadron collider located in a quasi-circular underground tunnel having a circumference of 80 to 100 km. The synchrotron radiation emitted by the high-energy hadron beam increases by more than two orders of magnitude compared to the LHC. To reduce the entropic load on the superconducting magnets' refrigeration system, beam screens are indispensable to extract the heat load at a higher temperature level. After illustrating the decisive constraints of the beam screen's refrigeration design, this paper presents a preliminary design of the length of a continuous cooling loop comparing helium and neon, for different cooling channel geometries with emphasis on the cooling length limitations and the exergetic efficiency.

  11. Beam-Flattener Design for High Energy Radiographic Inspection

    Science.gov (United States)

    Grandin, Robert; Rudolphi, Thomas

    2009-01-01

    This report documents the work done to develop a beam flattener for use in the inspection of rocket motors at ATK Space Systems Utah facilities. The following pages provide a brief introduction to the necessity of this project, comprehensive description of the design methodology, and experimentally-based conclusions regarding project success.

  12. Study of beam transport lines for a biomedical research facility at CERN based on LEIR

    CERN Document Server

    Abler, D; Garonna, A; Peach, K

    2014-01-01

    The Low Energy Ion Ring (LEIR) at CERN has been proposed to provide ion beams with magnetic rigidities up to 6.7 T.m for biomedical research, in parallel to its continued operation for LHC and SPS fixed target physics experiments. In the context of this project, two beamlines are proposed for transporting the extracted beam to future experimental end-stations: a vertical beamline for specific low-energy radiobiological research, and a horizontal beamline for radiobiology and medical physics experimentation. This study presents a first linear-optics design for the delivery of 1–5mm FWHM pencil beams and 5 cm 5 cm homogeneous broad beams to both endstations. High field uniformity is achieved by selection of the central part of a strongly defocused Gaussian beam, resulting in low beam utilisation.

  13. Spiral design and beam dynamics for a variable energy cyclotron

    International Nuclear Information System (INIS)

    Beam-orbit studies were performed for the conversion of the SREL synchrocyclotron magnet for use as a room temperature, multiparticle, isochronous cyclotron. Based on model magnet measurements of field profiles for 8 to 230K gauss hill fields, a four sector spiral pole tip design has been realized which allows all isotope species of heavy ion beams to be accelerated to required final energies. The total spiral angle of 380 allows injection of the beams from the MP tandem into the cyclotron through a valley. The two valey RF system of 140 kV peak accelerates beams on harmonic numbers 2, 3, 4, 6 and 10 at 14 to 21 MHz. Computer calculations indicated acceptable ν/sub z/, ν/sub r/ and phase space beam characteristics and passing of resonances for typical beams considered: 16O at 8 and 150 MeV/amu, 60Ni at 100 MeV/amu and 238U at 2.5 and 16 MeV/amu. Single turn extraction is achieved with electrostatic deflection

  14. Mechanical design and development of beam transport system for infra-red free electron laser (IR-FEL)

    International Nuclear Information System (INIS)

    An infrared free-electron laser (IR-FEL) that will be tunable at around 50μm wavelength is currently being developed at the RRCAT, Indore. The FEL will use a 1525 MeV normal conducting linear accelerator and a 50 mm period, 2.5 m long undulator housed in a 4.1 m long optical cavity. Design and fabrication of support system, beam transport chambers, translation systems, precision motorized mirror mounts and beam transport pipes is also done. Structural integrity and rigidity of this beam transport line along with specially designed support system is analysed using Finite Element Method (FEM). Based on the design data, all fabrication drawings are made and fabrication of this beam transport line is under advanced stage. This paper presents kinematic and structural design and development of beam transport line, optical motorized mirror mounts, and precision support systems for IR-FEL project at RRCAT, Indore. The salient features of high purity dry nitrogen filled system would also be discussed. The commissioning status of the beam transport system would be discussed in this paper.

  15. Detail design of the beam source for the SPIDER experiment

    Energy Technology Data Exchange (ETDEWEB)

    Marcuzzi, D. [Consorzio RFX, Euratom-ENEA Association, C.so Stati Uniti 4, I-35127 Padova (Italy); Agostinetti, P., E-mail: piero.agostinetti@igi.cnr.i [Consorzio RFX, Euratom-ENEA Association, C.so Stati Uniti 4, I-35127 Padova (Italy); Dalla Palma, M.; Degli Agostini, F.; Pavei, M.; Rizzolo, A.; Tollin, M.; Trevisan, L. [Consorzio RFX, Euratom-ENEA Association, C.so Stati Uniti 4, I-35127 Padova (Italy)

    2010-12-15

    The ITER Neutral Beam Test Facility (PRIMA-Padova Research on Injector Megavolt Accelerated) is planned to be built at Consorzio RFX (Padova, Italy). PRIMA includes two experimental devices: a full size plasma source with low voltage extraction called SPIDER (Source for Production of Ion of Deuterium Extracted from RF plasma) and a full size neutral beam injector at full beam power called MITICA (Megavolt ITER Injector Concept Advancement). SPIDER is the first experimental device to be built and operated, aiming at testing the extraction of a negative ion beam (made of H{sup -} and in a later stage D{sup -} ions) from an ITER size ion source. The main requirements of this experiment are a H{sup -}/D{sup -} current of approximately 70 A/50 A and an energy of 100 keV. This paper presents an overview of the SPIDER beam source design, with a particular focus on the main design choices, aiming at reaching the best compromise between physics, optics, thermo-mechanical, cooling, assembly and electrical requirements.

  16. Present status and first results of the final focus beam line at the KEK Accelerator Test Facility

    CERN Document Server

    Bambade, P; Amann, J; Angal-Kalinin, D; Apsimon, R; Araki, S; Aryshev, A; Bai, S; Bellomo, P; Bett, D; Blair, G; Bolzon, B; Boogert, S; Boorman, G; Burrows, P N; Christian, G; Coe, P; Constance, B; Delahaye, J P; Deacon, L; Elsen, E; Faus-Golfe, A; Fukuda, M; Gao, J; Geffroy, N; Gianfelice-Wendt, E; Guler, H; Hayano, H; Heo, A Y; Honda, Y; Huang, J Y; Hwang, W H; Iwashita, Y; Jeremie, A; Jones, J; Kamiya, Y; Karataev, P; Kim, E S; Kim, H S; Kim, S H; Komamiya, S; Kubo, K; Kume, T; Kuroda, S; Lam, B; Lyapin, A; Masuzawa, M; McCormick, D; Molloy, S; Naito, T; Nakamura, T; Nelson, J; Okamoto, D; Okugi, T; Oroku, M; Park, Y J; Parker, B; Paterson, E; Perry, C; Pivi, M; Raubenheimer, T; Renier, Y; Resta-Lopez, J; Rimbault, C; Ross, M; Sanuki, T; Scarfe, A; Schulte, D; Seryi, A; Spencer, C; Suehara, T; Sugahara, R; Swinson, C; Takahashi, T; Tauchi, T; Terunuma, N; Tomas, R; Urakawa, J; Urner, D; Verderi, M; Wang, M H; Warden, M; Wendt, M; White, G; Wittmer, W; Wolski, A; Woodley, M; Yamaguchi, Y; Yamanaka, T; Yan, Y; Yoda, H; Yokoya, K; Zhou, F; Zimmermann, F

    2010-01-01

    ATF2 is a final-focus test beam line which aims to focus the low emittance beam from the ATF damping ring to a vertical size of about 37 nm and to demonstrate nanometer level beam stability. Several advanced beam diagnostics and feedback tools are used. In December 2008, construction and installation were completed and beam commissioning started, supported by an international team of Asian, European, and U.S. scientists. The present status and first results are described.

  17. Present Status And First Results of the Final Focus Beam Line at the KEK Accelerator Test Facility

    Energy Technology Data Exchange (ETDEWEB)

    Bambade, P.; /Orsay /KEK, Tsukuba; Alabau Pons, M.; /Valencia U., IFIC; Amann, J.; /SLAC; Angal-Kalinin, D.; /Daresbury; Apsimon, R.; /Oxford U., JAI; Araki, S.; Aryshev, A.; /KEK, Tsukuba; Bai, S.; /Beijing, Inst. High Energy Phys.; Bellomo, P.; /SLAC; Bett, D.; /Oxford U., JAI; Blair, G.; /Royal Holloway, U. of London; Bolzon, B.; /Savoie U.; Boogert, S.; Boorman, G.; /Royal Holloway, U. of London; Burrows, P.N.; Christian, G.; Coe, P.; Constance, B.; /Oxford U., JAI; Delahaye, Jean-Pierre; /CERN; Deacon, L.; /Royal Holloway, U. of London; Elsen, E.; /DESY /Valencia U., IFIC /KEK, Tsukuba /Beijing, Inst. High Energy Phys. /Savoie U. /Fermilab /Ecole Polytechnique /KEK, Tsukuba /Kyungpook Natl. U. /KEK, Tsukuba /Pohang Accelerator Lab. /Kyoto U., Inst. Chem. Res. /Savoie U. /Daresbury /Tokyo U. /Royal Holloway, U. of London /Kyungpook Natl. U. /Pohang Accelerator Lab. /Tokyo U. /KEK, Tsukuba /SLAC /University Coll. London /KEK, Tsukuba /SLAC /Royal Holloway, U. of London /KEK, Tsukuba /Tokyo U. /SLAC /Tohoku U. /KEK, Tsukuba /Tokyo U. /Pohang Accelerator Lab. /Brookhaven /SLAC /Oxford U., JAI /SLAC /Orsay /KEK, Tsukuba /Oxford U., JAI /Orsay /Fermilab /Tohoku U. /Manchester U. /CERN /SLAC /Tokyo U. /KEK, Tsukuba /Oxford U., JAI /Hiroshima U. /KEK, Tsukuba /CERN /KEK, Tsukuba /Oxford U., JAI /Ecole Polytechnique /SLAC /Oxford U., JAI /Fermilab /SLAC /Liverpool U. /SLAC /Tokyo U. /SLAC /Tokyo U. /KEK, Tsukuba /SLAC /CERN

    2011-11-11

    ATF2 is a final-focus test beam line which aims to focus the low emittance beam from the ATF damping ring to a vertical size of about 37 nm and to demonstrate nanometer level beam stability. Several advanced beam diagnostics and feedback tools are used. In December 2008, construction and installation were completed and beam commissioning started, supported by an international team of Asian, European, and U.S. scientists. The present status and first results are described.

  18. Ridge filter design for a particle therapy line

    Science.gov (United States)

    Kim, Chang Hyeuk; Han, Garam; Lee, Hwa-Ryun; Kim, Hyunyong; Jang, Hong Suk; Kim, Jeong Hwan; Park, Dong Wook; Jang, Sea Duk; Hwang, Won Taek; Kim, Geun-Beom; Yang, Tae-Keun

    2014-05-01

    The beam irradiation system for particle therapy can use a passive or an active beam irradiation method. In the case of an active beam irradiation, using a ridge filter would be appropriate to generate a spread-out Bragg peak (SOBP) through a large scanning area. For this study, a ridge filter was designed as an energy modulation device for a prototype active scanning system at MC-50 in Korea Institute of Radiological And Medical Science (KIRAMS). The ridge filter was designed to create a 10 mm of SOBP for a 45-MeV proton beam. To reduce the distal penumbra and the initial dose, [DM] determined the weighting factor for Bragg Peak by applying an in-house iteration code and the Minuit Fit package of Root. A single ridge bar shape and its corresponding thickness were obtained through 21 weighting factors. Also, a ridge filter was fabricated to cover a large scanning area (300 × 300 mm2) by Polymethyl Methacrylate (PMMA). The fabricated ridge filter was tested at the prototype active beamline of MC-50. The SOBP and the incident beam distribution were obtained by using HD-810 GaF chromatic film placed at a right triangle to the PMMA block. The depth dose profile for the SOBP can be obtained precisely by using the flat field correction and measuring the 2-dimensional distribution of the incoming beam. After the flat field correction is used, the experimental results show that the SOBP region matches with design requirement well, with 0.62% uniformity.

  19. Design of the AGS Booster Beam Position Monitor electronics

    International Nuclear Information System (INIS)

    The operational requirements of the AGS Booster Beam Position Monitor system necessitate the use of electronics with wide dynamic range and broad instantaneous bandwidth. Bunch synchronization is provided by a remote timing sequencer coupled to the local ring electronics via digital fiber-optic links. The Sequencer and local ring circuitry work together to provide single turn trajectory or average orbit and intensity information, integrated over 1 to 225 bunches. Test capabilities are built in for the purpose of enhancing BPM system accuracy. This paper describes the design of the Booster Beam Position Monitor electronics, and presents performance details of the front end processing, acquisition and timing circuitry

  20. Design study of a movable mask with low beam impedance

    International Nuclear Information System (INIS)

    A novel design of a movable-mask (collimator) for high current accelerators is proposed. The mask head is supported by a ceramics rod to reduce the interference with beam. One side of the rod is coated by a thin conductive material to avoid charge up of the head. The head is made of graphite or ceramics coated with copper to avoid the direct damage by an intense beam. The impedances of trapped modes, the loss factors and so on were evaluated by simulation codes. The frequencies and the Q factors of the trapped modes were also measured using a cold model, and compared with calculated ones. (author)

  1. Upgrades to the SPS-to-LHC Transfer Line Beam Stoppers for the LHC High-Luminosity Era

    CERN Document Server

    Kain, Verena; Fraser, Matthew; Goddard, Brennan; Meddahi, Malika; Perillo Marcone, Antonio; Steele, Genevieve; Velotti, Francesco

    2016-01-01

    Each of the 3 km long transfer lines between the SPS and the LHC is equipped with two beam stoppers (TEDs), one at the beginning of the line and one close to the LHC injection point, which need to absorb the full transferred beam. The beam stoppers are used for setting up the SPS extractions and transfer lines with beam without having to inject into the LHC. Energy deposition and thermo-mechanical simulations have, however, shown that the TEDs will not be robust enough to safely absorb the high intensity beams foreseen for the high-luminosity LHC era. This paper will summarize the simulation results and limitations for upgrading the beam stoppers. An outline of the hardware upgrade strategy for the TEDs together with modifications to the SPS extraction interlock system to enforce intensity limitations for beam on the beam stoppers will be given.

  2. Design and development of pulsed electron beam accelerator 'AMBICA - 600'

    Science.gov (United States)

    Verma, Rishi; Deb, Pankaj; Shukla, Rohit; Sharma, Surender; Shyam, Anurag

    2012-11-01

    Short duration, high power pulses with fast rise time and good flat-top are essentially required for driving pulsed electron beam diodes. To attain this objective, a dual resonant Tesla transformer based pulsed power accelerator 'AMBICA-600' has been developed. In this newly developed system, a coaxial water line is charged through single turn Tesla transformer that operates in the dual resonant mode. For making the accelerator compact, in the high power pulse forming line, water has been used as dielectric medium because of its high dielectric constant, high dielectric strength and high energy density. The coaxial waterline can be pulsed charged up to 600kV, has impedance of ~5Ω and generates pulse width of ~60ns. The integrated system is capable of producing intense electron beam of 300keV, 60kA when connected to impedance matched vacuum diode. In this paper, system hardware details and experimental results of gigawatt electron beam generation have been presented.

  3. Analysis of the proton beam in the DESY transport lines by video readout

    CERN Document Server

    Solodovnik, F; Wittenburg, K

    2000-01-01

    Injection efficiency, beam optic matching and emittance preservation are very important parameters in achieving a high luminosity in large proton accelerators. We improved the analysing system of the phosphor screen readout of the proton transport lines in the accelerator chain of HERA with respect to the parameters above. The screens are read out by simple CCD video cameras. The signals are stored in local frame grabbers. An analogue output of the stored image is multiplexed and read-out by a fast PCI frame grabber card in a PC. The beam orbit and the beam emittance can be measured from each screen. A Visual Basic program is used to displays the trajectory and the envelope of the beam from a single transfer. The same program helps to drive bumps to achieve a proper steering through the line. The beam width can be measured from selected screens to calculate the emittance and other beam parameters including their errors. The read out and analysing system will be described and measurements will be shown.

  4. In situ baking method for degassing of a kicker magnet in accelerator beam line

    Energy Technology Data Exchange (ETDEWEB)

    Kamiya, Junichiro, E-mail: kamiya.junichiro@jaea.go.jp; Ogiwara, Norio; Yanagibashi, Toru; Kinsho, Michikazu [Japan Atomic Energy Agency, J-PARC Center, Ooaza Shirakata 2-4, Tokai, Naka, Ibaraki 319-1195 (Japan); Yasuda, Yuichi [SAKAGUCHI E.H VOC CORP., Sakura Dai-san Kogyodanchi 1-8-6, Osaku, Sakura, Chiba 285-0802 (Japan)

    2016-03-15

    In this study, the authors propose a new in situ degassing method by which only kicker magnets in the accelerator beam line are baked out without raising the temperature of the vacuum chamber to prevent unwanted thermal expansion of the chamber. By simply installing the heater and thermal radiation shield plates between the kicker magnet and the chamber wall, most of the heat flux from the heater directs toward the kicker magnet. The result of the verification test showed that each part of the kicker magnet was heated to above the target temperature with a small rise in the vacuum chamber temperature. A graphite heater was selected in this application to bake-out the kicker magnet in the beam line to ensure reliability and easy maintainability of the heater. The vacuum characteristics of graphite were suitable for heater operation in the beam line. A preliminary heat-up test conducted in the accelerator beam line also showed that each part of the kicker magnet was successfully heated and that thermal expansion of the chamber was negligibly small.

  5. The Fluka Linebuilder and Element Database: Tools for Building Complex Models of Accelerators Beam Lines

    CERN Document Server

    Mereghetti, A; Cerutti, F; Versaci, R; Vlachoudis, V

    2012-01-01

    Extended FLUKA models of accelerator beam lines can be extremely complex: heavy to manipulate, poorly versatile and prone to mismatched positioning. We developed a framework capable of creating the FLUKA model of an arbitrary portion of a given accelerator, starting from the optics configuration and a few other information provided by the user. The framework includes a builder (LineBuilder), an element database and a series of configuration and analysis scripts. The LineBuilder is a Python program aimed at dynamically assembling complex FLUKA models of accelerator beam lines: positions, magnetic fields and scorings are automatically set up, and geometry details such as apertures of collimators, tilting and misalignment of elements, beam pipes and tunnel geometries can be entered at user’s will. The element database (FEDB) is a collection of detailed FLUKA geometry models of machine elements. This framework has been widely used for recent LHC and SPS beam-machine interaction studies at CERN, and led to a dra...

  6. Laser assisted decay spectroscopy at the CRIS beam line at ISOLDE

    International Nuclear Information System (INIS)

    A new collinear resonant ionization spectroscopy (CRIS) beam line has recently been installed at ISOLDE, CERN utilising lasers to combine collinear laser spectroscopy and resonant ionization spectroscopy. The combined technique offers the ability to purify an ion beam that is heavily contaminated with radioactive isobars, including the ground state of an isotope from its isomer, allowing sensitive secondary experiments to be performed. A new programme aiming to use the CRIS technique for the separation of nuclear isomeric states for decay spectroscopy will commence in 2011. A decay spectroscopy station, consisting of a rotating wheel implantation system for alpha decay spectroscopy, and three high purity germanium detectors around the implantation site for gamma-ray detection, has been developed for this purpose. This paper will report the current status of the laser assisted decay spectroscopy set-up for the CRIS beam line.

  7. New development of hadron physics at new laser electron beam line (LEP2) of SPring-8

    International Nuclear Information System (INIS)

    This paper introduces the outline of LEPS2 beam line and two types of large detectors (electromagnetic calorimeter BGOegg and solenoid spectrometer), LEPS2/BGOegg experiment, and the target physics using LEPS2 solenoid spectrometer. In LEPS2 beam line, experiments are performed with the improvement of beam intensity by nearly one digit due to the simultaneous incidence of multiple lasers of high output, as well as with the installation of a large solid angle high-resolution detector. In LEPS2/BGOegg experiment, direct observation with a large solid angle of mesons such as π0, η, η', and ω has become possible, which has given expectation for new physics. As one of the physics at the core of BGOegg experiments, there is the systematic examination of interaction between η' and nucleus/nucleon. In the physics using a solenoid spectrometer, the first target is the measurement of penta-quark particle Θ+. (A.O.)

  8. Design of a new tracking device for on-line dose monitor in ion therapy

    CERN Document Server

    Traini, Giacomo; Bollella, Angela; Collamati, Francesco; De Lucia, Erika; Faccini, Riccardo; Ferroni, Fernando; Frallicciardi, Paola Maria; Mancini-Terracciano, Carlo; Marafini, Michela; Mattei, Ilaria; Miraglia, Federico; Muraro, Silvia; Paramatti, Riccardo; Piersanti, Luca; Pinci, Davide; Rucinski, Antoni; Russomando, Andrea; Sarti, Alessio; Sciubba, Adalberto; Senzacqua, Martina; Solfaroli-Camillocci, Elena; Toppi, Marco; Voena, Cecilia; Patera, Vincenzo

    2016-01-01

    Charged Particle Therapy is a technique for cancer treatment that exploits hadron beams, mostly protons and carbons. A critical issue is the monitoring of the dose released by the beam to the tumor and to the surrounding tissues. We present the design of a new tracking device for monitoring on-line the dose in ion therapy through the detection of secondary charged particles produced by the beam interactions in the patient tissues. In fact, the charged particle emission shape can be correlated with the spatial dose release and the Bragg peak position. The detector uses the information provided by 12 layers of scintillating fibers followed by a plastic scintillator and a small calorimeter made of a pixelated Lutetium Fine Silicate crystal. Simulations have been performed to evaluate the achievable spatial resolution and a possible application of the device for the monitoring of the dose pro?le in a real treatment is presented.

  9. Collimator design for single beam gamma ray industrial tomography and fan beam geometry

    Energy Technology Data Exchange (ETDEWEB)

    Vasconcelos, Daniel A.A. de [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Department of Nuclear Energy; Melo, Silvio B., E-mail: ccd@ufpe.br, E-mail: sbm@cin.ufpe.br [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Informatic Center; Hamada, Margarida M.; Mesquita, Carlos H., E-mail: mmhamada@usp.br, E-mail: chmesqui@usp.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Santos, Valdemir A. dos, E-mail: vas@unicap.com [Department of Chemistry. Catholic University of Pernambuco. UNICAP (Brazil)

    2011-07-01

    In the design of a setup for industrial tomography, it is important to aim for high space and temporal resolution along with a high efficiency for detection. The present study evaluates theoretical and experimental aspects of two experimental setups having stainless steel and Plexiglas riser tubes and using a single parallel beam and a fan beam with three apertures. The topography's resolution parameters as density, spatial and temporal are quantified according to parallel collimators design. An irradiation geometry of source-tube-detector with a 5.6.10{sup 11} Bq {sup 137}Cs radioactive source, a stainless cylinder and a NaI(Tl) 2'' x 2'' scintillation detector has been studied. Stainless steel experimental riser tube of 16.8 cm diameter and of 0.7 cm wall thickness has a high absorption fraction of energy, which is eventually converted into scatter radiation that can reach detector as noise and result in an undesirably low signal/noise ratio. The collimator compromise efficiency versus resolution is calculated and compared to spectrum quality. Fan beam scanner can improve temporal resolution and the spatial resolution is due to the number of detectors and geometry. Experimental measurements of the fan beam trajectories were carried out in order to compare with parallel gamma ray trajectories. It brings out the necessary information for the design of an adaptive scanner to obtain comparable object data as that achieved in parallel beam tomography. Such design allows a limited number of three detectors for a riser column. The scanner should operate to measure flux inside the riser column scanner while maintaining the temporal resolution gain. (author)

  10. On the diagnostic of the beam line in A 150 KeV ion accelerator

    International Nuclear Information System (INIS)

    The present work investigates the behaviour of the beam inside a lens consisting of three cylinders. The optical parameters of the accelerating lens are obtained. We also find the maximum beam radius at the end of the accelerating lens. The total voltage effect which limits the voltage across an evacuated tube in a manner distinct from that of ordinary insulation, generally prevents a linear increase in voltage with an increase in tube length for fixed voltage gradient along the tube. The avoid the total voltage effect it is necessary to incline the central plane of the electrodes to the axis of the tube, thereby reducing the length of the electric field lines of force to only a fraction of the insulating length of the tube. So acceleration tubes utilizing inclined field principles are discussed and calculations of the ion beam in axis in inclined field tubes with equal maximum displacement of the beam are made

  11. Complex modes and new amplification regimes in periodic multi transmission lines interacting with an electron beam

    CERN Document Server

    Othman, Mohamed; Capolino, Filippo

    2014-01-01

    We show the existence of a new regime of operation for travelling wave tubes (TWTs) composed of slow-wave periodic structures that support two or more electromagnetic modes, with at least two synchronized with an electron beam. The interaction between the slow-wave structure and an electron beam is quantified using a multi transmission line approach (MTL) and transfer matrix analysis leading to the identification of modes with complex Bloch wavenumber. In particular, we report a new operation condition for TWTs based on an electron beam synchronous to two modes exhibiting a degeneracy condition near a band edge in a MTL slow-wave periodic structure. We show a phenomenological change in the band structure of periodic TWT where we observe at least two growing modal cooperating solutions as opposed to a uniform MTL interacting with an electron beam where there is strictly only one growing mode solution.

  12. Conceptual design of negative-ion-based 500 keV, 20 MW neutral beam injector

    International Nuclear Information System (INIS)

    The conceptual design of the source plasma generator and the accelerating system is presented. Three candidate systems are then examined, each with a different neutralizing cell. The system having a very long neutralizer was judged to be the most suitable to the reactor considered. It was designed in detail. The long neutralizer (30 m) has many advantages: (1) the ion source can be located far from the reactor, permitting a narrow injection tube and tangential injection angle; (2) neutron shielding is easy because the solid angle of the beam line is very small; (3) complex components are removed from the vicinity of the reactor

  13. Beam imaging in the injection line of the INFN-LNS superconducting cyclotron

    Energy Technology Data Exchange (ETDEWEB)

    Nicolosi, Dario, E-mail: dario.nicolosi@lns.infn.it; Cosentino, Luigi; Mascali, David; Pappalardo, Alfio; Castro, Maurizio; Celona, Luigi; Marchetta, Carmelo; Marletta, Salvatore; Maugeri, Antonio; Rifuggiato, Danilo; Seminara, Angelo; Gammino, Santo [INFN-Laboratori Nazionali del Sud, Via S. Sofia 62, 95123 Catania (Italy)

    2016-02-15

    A cheap and efficient diagnostic system for beam monitoring has been recently developed at INFN-LNS in Catania. It consists of a high sensitivity CCD camera detecting the light produced by an ion beam hitting the surface of a scintillating screen and a frame grabber for image acquisition. A scintillating screen, developed at INFN-LNS and consisting of a 2 μm BaF{sub 2} layer evaporated on an aluminium plate, has been tested by using {sup 20}Ne and {sup 40}Ar beams in the keV energy range. The CAESAR ECR ion source has been used for investigating the influence of the frequency and magnetic field tuning effects, the impact of the microwave injected power, and of the focusing solenoids along the low energy beam transport on the beam shape and current. These tests will allow to better understand the interplay between the plasma and beam dynamics and, moreover, to improve the transport efficiency along the low energy beam line and the matching with the superconducting cyclotron, particularly relevant in view of the expected upgrade of the machine.

  14. DESIGN REPORT OF THE TRANSFER LINE BENDING MAGNETS FOR LINAC4

    CERN Document Server

    Thonet, P

    2013-01-01

    A review of a preliminary design of the H-shape Linac4 transfer line bending magnet described in EDMS 1252682 evidenced that the magnetic field quality has to be improved. This new report describes the modifications performed on the initial design to meet the field quality requirements imposed by beam optics specifications and provides a comprehensive list of the magnet parameters. It will be the reference for the write-up of the technical specifications for the purchase of the 6 magnets needed for Linac4.

  15. Pencil-Beam Single-point-fed Dirac Leaky-Wave Antenna on a Transmission-Line Grid

    OpenAIRE

    Dorrah, Ayman H.; Eleftheriades, George V.

    2016-01-01

    Leaky-wave antennas (LWAs) are widely used as single-point-fed linear antenna arrays. The extension of LWAs to 2D implies that they can be used as single-point-fed 2D antenna arrays without requiring a complex feeding network. However, generating a pencil beam from 2D LWAs is not straightforward and due care has to be taken for the design of the LWA. On the other hand, transmission-line (TL) grids have demonstrated interesting behaviors, such as an effective negative refractive index and grow...

  16. Design and Analysis of Parallel-Coupled Line Bandpass Filter

    OpenAIRE

    Talib Mahmood Ali

    2013-01-01

    A compact microwave parallel coupled line resonator seventh order bandpass filter (BPF) is presented in this paper, consist a 8-parallel coupled line pairs designed for a maximally flat response or Butterworth response at a center frequency of 2.44175 GHz and with a fractional bandwidth, Δ= 0.035. The filter was implemented in a microstrip platform with a permittivity of the substrate Er=4.4 and a substrate height h=1.5mm. The physical parameters of the parallel coupled line filter sections w...

  17. Detectors for the Imaging and Medical Beam Line at the Australian Synchrotron

    International Nuclear Information System (INIS)

    The Australian Synchrotron Imaging and Medical Beam Line (IMBL) began phased commissioning in late 2008 and was opened for Users this year (November, 2012). It will provide Australia with an unrivaled facility for x-ray imaging and radiotherapy research covering a wide range of applications in disease studies, treatments, and revealing physiological processes. The clinical research drivers for IMBL rely on the facility's ability to support high spatial and contrast resolution imaging. The wide variety of demands for x-ray imaging with IMBL cannot be covered with any single detector system. A list of six detector categories was drawn up after assessing the techniques that are most likely to be used during our first years of operation. Detectors in this list will cover the fields of view, resolutions (both spatial and contrast), and frame rates required for a majority of the experiments. We present the six detectors within these categories. One detector system is the topic of a development project with the goal of producing a large field of view high aspect ratio system. Some initial design ideas are presented.

  18. Powerloads on the front end components and the duct of the heating and diagnostic neutral beam lines at ITER

    Energy Technology Data Exchange (ETDEWEB)

    Singh, M. J.; Boilson, D.; Hemsworth, R. S.; Geli, F.; Graceffa, J.; Urbani, M.; Schunke, B.; Chareyre, J. [ITER Organisation, 13607 St. Paul-Lez-Durance Cedex (France); Dlougach, E.; Krylov, A. [RRC Kurchatov institute, 1, Kurchatov Sq, Moscow, 123182 (Russian Federation)

    2015-04-08

    The heating and current drive beam lines (HNB) at ITER are expected to deliver ∼16.7 MW power per beam line for H beams at 870 keV and D beams at 1 MeV during the H-He and the DD/DT phases of ITER operation respectively. On the other hand the diagnostic neutral beam (DNB) line shall deliver ∼2 MW power for H beams at 100 keV during both the phases. The path lengths over which the beams from the HNB and DNB beam lines need to be transported are 25.6 m and 20.7 m respectively. The transport of the beams over these path lengths results in beam losses, mainly by the direct interception of the beam with the beam line components and reionisation. The lost power is deposited on the surfaces of the various components of the beam line. In order to ensure the survival of these components over the operational life time of ITER, it is important to determine to the best possible extent the operational power loads and power densities on the various surfaces which are impacted by the beam in one way or the other during its transport. The main factors contributing to these are the divergence of the beamlets and the halo fraction in the beam, the beam aiming, the horizontal and vertical misalignment of the beam, and the gas profile along the beam path, which determines the re-ionisation loss, and the re-ionisation cross sections. The estimations have been made using a combination of the modified version of the Monte Carlo Gas Flow code (MCGF) and the BTR code. The MCGF is used to determine the gas profile in the beam line and takes into account the active gas feed into the ion source and neutraliser, the HNB-DNB cross over, the gas entering the beamline from the ITER machine, the additional gas atoms generated in the beam line due to impacting ions and the pumping speed of the cryopumps. The BTR code has been used to obtain the power loads and the power densities on the various surfaces of the front end components and the duct modules for different scenarios of ITER

  19. Preliminary Design of the HiLumi-LHC Triplet Area Beam Screen

    CERN Document Server

    Kersevan, R; Kos, N

    2014-01-01

    The so-called beam screen (BS) is a proven solution for intercepting the thermal loads caused by the circulating beams in the cryogenically-cooled sections of the LHC and minimizing dynamic vacuum effects [1]. The new triplet area foreseen for the HiLumi-LHC (HL-LHC) machine upgrade [2] has the additional feature of needing internal tungsten shields to reduce the amount of collision debris which is deflected by the high-gradient triplet magnets towards the superconducting magnets' cold masses and coils. The very aggressive optics design, based on large beam separations, calls for a maximum of physical space to remain available to the counter rotating beams in the common BS. This places severe constraints to the fabrication and installation tolerances of the BS itself, in addition to affecting the design and routing of the cryogenic lines in the area. The latest version of the BS design will be shown and discussed, together with future plans for testing materials, fabrication procedures, and installation.

  20. FLP: a field line plotting code for bundle divertor design

    International Nuclear Information System (INIS)

    A computer code was developed to aid in the design of bundle divertors. The code can handle discrete toroidal field coils and various divertor coil configurations. All coils must be composed of straight line segments. The code runs on the PDP-10 and displays plots of the configuration, field lines, and field ripple. It automatically chooses the coil currents to connect the separatrix produced by the divertor to the outer edge of the plasma and calculates the required coil cross sections. Several divertor designs are illustrated to show how the code works

  1. Verifying Architectural Design Rules of the Flight Software Product Line

    Science.gov (United States)

    Ganesan, Dharmalingam; Lindvall, Mikael; Ackermann, Chris; McComas, David; Bartholomew, Maureen

    2009-01-01

    This paper presents experiences of verifying architectural design rules of the NASA Core Flight Software (CFS) product line implementation. The goal of the verification is to check whether the implementation is consistent with the CFS architectural rules derived from the developer's guide. The results indicate that consistency checking helps a) identifying architecturally significant deviations that were eluded during code reviews, b) clarifying the design rules to the team, and c) assessing the overall implementation quality. Furthermore, it helps connecting business goals to architectural principles, and to the implementation. This paper is the first step in the definition of a method for analyzing and evaluating product line implementations from an architecture-centric perspective.

  2. Performance of the double multilayer monochromator on the NSLS wiggler beam line X25

    International Nuclear Information System (INIS)

    A tunable, double multilayer x-ray monochromator has recently been implemented on the National Synchrotron Light Source (NSLS) X25 wiggler beam line. It is based on a parallel pair of tungsten-boron-carbide multilayer films grown on silicon substrates and purchased from Osmic, Inc. of Troy, Michigan, USA. It acts as an optional alternative to the conventional double silicon crystal monochromator, and uses the same alignment mechanism. Two other NSLS beam lines also have had this kind of monochromator installed recently, following the lead of the NSLS X20C IBM/MIT beam line which has used a double multilayer monochromator for several years. Owing to the 100 times broader bandwidth of a multilayer x-ray monochromator, compared with a silicon monochromator, the multilayer monochromator has the obvious advantage of delivering 100 times the flux of a silicon monochromator, and thereby makes more efficient use of the continuous synchrotron radiation spectrum, yet preserves the narrow collimation of the incident synchrotron beam. In particular, multilayer x-ray bandwidths, on the order of 1%, are well-matched to x-ray undulator linewidths. Performance results for the X25 multilayer monochromator are presented, comparing it with the silicon monochromator. Of note is its short- and long-term performance as an x-ray monochromator delivering the brightness of the wiggler source in the presence of the high-power white beam. Detailed measurements of its spatial beam profile and wavelength dispersion have been made, and it is shown how its resolution could be improved when desired. Finally, its peculiar, anisotropic resolution function in reciprocal space, and its bearing upon x-ray crystallography and scattering experiments, will be discussed, and highlighted by the results of a protein crystallography experiment. copyright 1997 American Institute of Physics

  3. The Design of Plywood Webs for Airplane Wing Beams

    Science.gov (United States)

    Trayer, George W

    1931-01-01

    This report deals with the design of plywood webs for wooden box beams to obtain maximum strength per unit weight. A method of arriving at the most efficient and economical web thickness, and hence the most suitable unit shear stress, is presented and working stresses in shear for various types of webs and species of plywood are given. The questions of diaphragm spacing and required glue area between the webs and flange are also discussed.

  4. Design progress for the ITER torus and neutral beam cryopumps

    International Nuclear Information System (INIS)

    The ITER torus and neutral beam cryopumps are complex vacuum pumps which will be designed to the build-to-print level stage for the call for tender for manufacturing. Although being completely different in size, the pumps share the same concept of cryosorption on activated charcoal. Thus, the design procedure itself can follow the same generic workflow. The requirements on the pumps are summarized and the status of design evolution is described. Both design packages require specific R and D for experimental clarification and design validation. Two examples for this approach are given, namely the characterization of the closing forces of the torus pump inlet valve, and the measurement of hydraulic resistance coefficients of hydroformed components.

  5. Designing Fresnel microlenses for focusing astigmatic multi-Gaussian beams by using fractional order Fourier transforms

    International Nuclear Information System (INIS)

    According to a scalar theory of diffraction, light propagation can be expressed by two-dimensional fractional order Fourier transforms. Since the fractional Fourier transform of a chirp function is a Dirac distribution, focusing a light beam is optically achieved by using a diffractive screen whose transmission function is a two-dimensional chirp function. This property is applied to designing Fresnel microlenses, and the orders of the involved Fourier fractional transforms depend on diffraction distances as well as on emitter and receiver radii of curvature. If the emitter is astigmatic (with two principal radii of curvature), the diffraction phenomenon involves two one-dimensional fractional Fourier transforms whose orders are different. This degree of freedom allows us to design microlenses that can focus astigmatic Gaussian beams, as produced by a line-shaped laser diode source.

  6. Designing Fresnel microlenses for focusing astigmatic multi-Gaussian beams by using fractional order Fourier transforms

    Energy Technology Data Exchange (ETDEWEB)

    Patino, A [Universidad Technologica de Bolivar, Cartagena de Indias (Colombia); Durand, P-E; Fogret, E; Pellat-Finet, P, E-mail: alberto.patino-vanegas@univ-ubs.fr [Laboratoire de mathematiques et applications des mathematiques, Universite de Bretagne Sud, B P 92116, 56321 Lorient cedex (France)

    2011-01-01

    According to a scalar theory of diffraction, light propagation can be expressed by two-dimensional fractional order Fourier transforms. Since the fractional Fourier transform of a chirp function is a Dirac distribution, focusing a light beam is optically achieved by using a diffractive screen whose transmission function is a two-dimensional chirp function. This property is applied to designing Fresnel microlenses, and the orders of the involved Fourier fractional transforms depend on diffraction distances as well as on emitter and receiver radii of curvature. If the emitter is astigmatic (with two principal radii of curvature), the diffraction phenomenon involves two one-dimensional fractional Fourier transforms whose orders are different. This degree of freedom allows us to design microlenses that can focus astigmatic Gaussian beams, as produced by a line-shaped laser diode source.

  7. Design study of a beam energy recovery system for a negative-ion-based neutral beam injector

    International Nuclear Information System (INIS)

    A beam energy recovery system for future neutral beam injectors based on negative ions has been designed. Residual negative ions are recovered electrically, while residual positive ions are decelerated on a soft-landing beam dump. This design simplifies the beam energy recovery power supply system an reduces the heat flux on the beam dump. Residual ions are separated into negative and positive ions by the stray magnetic field from the Fusion Engineering Reactor (FER). The next Japanese tokamak reactor. Each ion beam is also guided to the collector electrode and the soft-landing beam dump by the stray magnetic field. In the 500-keV/20-MW injector designed for FER, the total power efficiency can be improved from 46 to 59% by recovering the negative ions

  8. Design of a 2 Tesla transmission line magnet for the VLHC

    CERN Document Server

    Foster, G W; Novitski, I

    2000-01-01

    A prototype of the transmission line magnet for the Very Large Hadron Collider is being designed at Fermilab. This is a single-turn warm iron superconducting magnet in a "Double-C" configuration. Iron poles form a high quality alternating-gradient magnet field in two 20 mm height beam gaps. Simple magnet construction and manufacturing processes and a room temperature iron yoke give a significant reduction in magnet cost. Open beam gaps simplify magnetic measurements and vacuum chamber installation. The magnet mechanical stability was investigated for several mechanical models. A high field quality over the whole range (0.1 T-2.0 T) of field variation was calculated using correcting holes in the iron poles. The magnet optimization was carried out by POISSON, OPERA 2D and ANSYS codes. The results of magnet design and model tests are presented. (6 refs).

  9. Design and operation of the multiple-pulse driver line on the OMEGA laser

    Science.gov (United States)

    Kosc, T. Z.; Kelly, J. H.; Hill, E. M.; Waxer, L. J.

    2016-05-01

    The multiple-pulse driver line (MPD) provides on-shot co-propagation of two separately generated pulse shapes in all 60 OMEGA beams at the Laboratory for Laser Energetics. Smoothing by spectral dispersion (SSD), which increases the laser bandwidth, can be applied to either one of the two pulse shapes, thereby enabling dynamic bandwidth reduction. The design of the MPD required careful consideration of beam combination as well as the minimum pulse separation for two pulses generated by two separate seed sources. A new combined-pulse-shape diagnostic needed to be designed and installed after the last SSD grating. The capability of MPD to reduce dynamic bandwidth has been used on a series of campaigns on OMEGA and the performance data are presented.

  10. SIMULATION OF NEUTRON BACKGROUNDS FROM THE ILC EXTRACTION LINE BEAM DUMP

    Energy Technology Data Exchange (ETDEWEB)

    Darbha, S; Keller, L.; Maruyama, T.

    2008-01-01

    The operation of the International Linear Collider (ILC) as a precision measurement machine is dependent upon the quality of the charge-coupled device (CCD) silicon vertex detector. An integrated fl ux of 1010 neutrons/cm2 incident upon the vertex detector will degrade its performance by causing displacement damage in the silicon. One source of the neutron background arises from the dumping of the spent electron and positron beams into the extraction line beam dumps. The Monte Carlo program FLUKA was used to simulate the collision of the electron beam with the dump and to determine the resulting neutron fl ux at the interaction point (IP). A collimator and tunnel were added and their effect on the fl ux was analyzed. A neutron source was then generated and directed along the extraction line towards a model of the vertex detector to determine the neutron fl ux in its silicon layers. Models of the beampipe and BeamCal, a silicon-tungsten electromagnetic calorimeter in the very forward region of the detector, were placed in the extraction line and their effects on scattering were studied. The IP fl uence was determined to be 3.7x1010 +/- 2.3x1010 neutrons/cm2/year when the tunnel and collimator were in place, with no appreciable increase in statistics when the tunnel was removed. The BeamCal was discovered to act as a collimator by signifi cantly impeding the fl ow of neutrons towards the detector. The majority of damage done to the fi rst layer of the detector was found to come from neutrons with a direct line of sight from the fi rst extraction line quadrupole QDEX1, with only a small fraction scattering off of the beampipe and into the detector. The 1 MeV equivalent neutron fl uence was determined to be 9.3x108 neutrons/cm2/year from the electron beam alone. The two beams collectively contribute double to this fl uence, which is 19% of the threshold value in one year. Future work will improve the detector model and other sources of neutron backgrounds will be

  11. Construction of the beam profile monitor system with CameraLink in the SPring-8 booster ring and beam transport line

    International Nuclear Information System (INIS)

    We had measured the beam position and size in the SPring-8 booster ring and beam transport line by the monitor system that consists of analog video camera and fluorescent plate. It was difficult to estimate the seasonal change of the beam position and beam size between user operation cycles. In order to keep the high injection efficiency to SPring-8 storage ring, we need to achieve the tuning reproducibility of the accelerator parameter in the booster ring and beam transport line by using the quantitative data. The newly constructed beam profile monitor system consists of the digital CCD camera with external trigger synchronous capturing function, camera selectors, and server computers. Each camera system placed on the booster ring and beam transport line are managed by the UNIX server computer setup for each area. This system is connected by the cameralink configuration devices with cameralink cables or optical fiber cables. It became possible to capture image of beam profile synchronous with a beam trigger with a high resolution and a fast capturing time as same as it by using the analog video system. We will report the detail of beam profile monitor system with cameralink and the system operation. (author)

  12. Studies on the key parameters in segmental lining design

    Directory of Open Access Journals (Sweden)

    Zhenchang Guan

    2015-12-01

    Full Text Available The uniform ring model and the shell-spring model for segmental lining design are reviewed in this article. The former is the most promising means to reflect the real behavior of segmental lining, while the latter is the most popular means in practice due to its simplicity. To understand the relationship and the difference between these two models, both of them are applied to the engineering practice of Fuzhou Metro Line I, where the key parameters used in both models are described and compared. The effective ratio of bending rigidity η reflecting the relative stiffness between segmental lining and surrounding ground and the transfer ratio of bending moment ξ reflecting the relative stiffness between segment and joint, which are two key parameters used in the uniform ring model, are especially emphasized. The reasonable values for these two key parameters are calibrated by comparing the bending moments calculated from both two models. Through case studies, it is concluded that the effective ratio of bending rigidity η increases significantly with good soil properties, increases slightly with increasing overburden, and decreases slightly with increasing water head. Meanwhile, the transfer ratio of bending moment ξ seems to only relate to the properties of segmental lining itself and has a minor relation with the ground conditions. These results could facilitate the design practice for Fuzhou Metro Line I, and could also provide some references to other projects with respect to similar scenarios.

  13. Optimum design of band-gap beam structures

    DEFF Research Database (Denmark)

    Olhoff, Niels; Niu, Bin; Cheng, Gengdong

    2012-01-01

    of a single, linearly elastic material without damping. Numerical results are presented for different combinations of classical boundary conditions, prescribed orders of the upper and lower natural frequencies of maximized natural frequency gaps, and a given minimum constraint value for the beam......The design of band-gap structures receives increasing attention for many applications in mitigation of undesirable vibration and noise emission levels. A band-gap structure usually consists of a periodic distribution of elastic materials or segments, where the propagation of waves is impeded or...... significantly suppressed for a range of external excitation frequencies. Maximization of the band-gap is therefore an obvious objective for optimum design. This problem is sometimes formulated by optimizing a parameterized design model which assumes multiple periodicity in the design. However, it is shown in...

  14. Shielding design of the beam tube in the KMRR

    International Nuclear Information System (INIS)

    The Korea Multipurpose Research Reactor (KMRR) has a core of honeycomb form surrounded by a cylindrical reflector of D2O and will be operated at maximum thermal power of 30 MW. Seven beam tubes tangentially placed to the reactor core penetrate the reflector and extend to the biological shield end. In neutronics and shielding analysis, this complex geometry usually requires a three-dimensional treatment to obtain data with reasonable accuracy. However, computer implementation of transport or Monte Carlo calculations with a realistic three-dimensional beam tube model is not easy in regard to its problem size. This paper describes a KMRR beam tube shielding design method using coupling of Monte Carlo code MORSE-CG and two-dimensional discrete ordinates code DOT4.2 with VITAMIN-C nuclear data base. The evaluated dose rate at the outside of shield turns out to be 0.135 mrem/hr, which is well within the shielding design criteria 1.25 mrem/hr

  15. On-line electron beam measurements for the Los Alamos Free-Electron Laser

    International Nuclear Information System (INIS)

    Recent developments in the electron beam diagnostics used on the Los Alamos Free-Electron Laser (FEL) have extended our on-line, quantitative analysis capability to extraction efficiency and micropulse temporal duration. The FEL's 20-MeV electron beam is 100 μs in length and consists of ∼2000 micropulses of 20-ps duration and 46-ns separation. This extreme range of time scales is addressed by employing a combination of synchronized beam deflectors, an electron spectrometer, intensified video cameras, real-time video digitizers, and microcomputers. The tapered wiggler result for extraction efficiency (2%) and results for pulse duration measurements (10 to 15 ps) by two techniques are presented

  16. High power, high brightness electron beam generation in a pulse-line driven pseudospark discharge

    International Nuclear Information System (INIS)

    High brightness (∼ 3 x 1010 A/m2rad2), high power density (∼ 1010 W/cm2) electron beams have been generated by the mating of a hollow-cathode discharge device operating in the pseudospark regime to the output of a high power pulse line accelerator. Very small diameter (∼ 1 mm) electron beams with currents in the range 500-1000 A and energies in the range 150-300 keV have been generated with measured effective emittances of about 85 mm-mrad. Such emittances are comparable to those achieved in conventional electron beam sources at current densities several orders of magnitude lower than those observed in these experiments

  17. A closed-form solution to a viscoelastically supported Timoshenko beam under harmonic line load

    Science.gov (United States)

    Luo, W. L.; Xia, Y.; Zhou, X. Q.

    2016-05-01

    This study aims to formulate a closed-form solution to a viscoelastically supported Timoshenko beam under a harmonic line load. The differential governing equations of motion are converted into algebraic equations by assuming the deflection and rotation of the beam in harmonic forms with respect to time and space. The characteristic equation is biquadratic and thus contains 14 explicit roots. These roots are then substituted into Cauchy's residue theorem; consequently, five forms of the closed-form solution are generated. The present solution is consistent with that of an Euler-Bernoulli beam on a Winkler foundation, which is a special case of the present problem. The current solution is also verified through numerical examples.

  18. Measurement of KL0 flux at the J-PARC neutral-kaon beam line

    International Nuclear Information System (INIS)

    We describe the KL0 flux measurements performed at the J-PARC neutral-kaon beam line. This beam line was constructed for an experiment aiming to observe the CP-violating rare decay KL0→π0νν¯. The primary proton energy was 30 GeV and the KL0 production angle was 16°. Prior to the physics run, the KL0 flux and spectrum were measured by counting KL0→π+π-π0 decays with a simple setup, which was composed of an electromagnetic calorimeter and a hodoscope system. Results from these measurements are presented and compared with various hadron-interaction simulations.

  19. Applications to cultural heritage diagnostics at the new nuclear microprobe beam line at CEDAD

    International Nuclear Information System (INIS)

    A nuclear microprobe beam line has been installed at CEDAD (Centre for Dating and Diagnostics), University of Salento, Lecce, Italy. The beam line is connected to the -30 deg. port of the high energy switching magnet of a 3 MV HVEE 4130HC Tandetron accelerator. It is based on an Oxford Microbeam magnetic quadrupole triplet and its general features are presented. The results of functional tests are presented showing how a lateral spatial resolution as low as ∼2 μm has been achieved in vacuum by analysing standard reference material. The results obtained in the analysis of ancient radiocarbon dated biological tissues are presented for the identification and distribution of toxic elements such as Pb.

  20. National Synchrotron Light Source users manual: Guide to the VUV and x-ray beam lines

    International Nuclear Information System (INIS)

    The success of the National Synchrotron Light Source in the years to come will be based, in large part, on the size of the users community and the diversity of the scientific disciplines represented by these users. In order to promote this philosophy, this National Synchrotron Light Source (NSLS) Users Manual: Guide to the VUV and X-Ray Beam Lines, has been published. This manual serves a number of purposes. In an effort to attract new research, it will present to the scientific community-at-large the current and projected architecture and capabilities of the various VUV and x-ray beam lines and storage rings. We anticipate that this publication will be updated periodically in order to keep pace with the constant changes at the NSLS

  1. Development of an Ethernet enabled microcontroller based module for Superconducting Cyclotron ECR beam line control

    International Nuclear Information System (INIS)

    An Ethernet enabled control and data acquisition module is developed for remote control and monitoring of the ECR beam line equipment of the Superconducting Cyclotron. The PIC microcontroller based module supports multiple general purpose analog and digital inputs and outputs for interfacing with various equipments and an embedded web server. The remote monitoring and control of the equipment are achieved through the web based user interface. The user authenticated access to control parameters and module configuration parameters ensures the operational safety of the equipment under control. This module is installed in Superconducting Cyclotron ECR beam line for the control and monitoring of vacuum pumping modules, comprising of pumps, gate valves and dual vacuum gauges. The installation of these modules results in a distributed control with localised field cabling and hence better fault diagnosis. (author)

  2. Beam Cherenkov counter conception for in line identification of 270 GeV/c Σ- Ξ- and Ω-

    International Nuclear Information System (INIS)

    The purpose of this thesis is to design a beam Cerenkov counter. This counter will provide an on line identification of the Σ-, Ξ- and Ω- hyperons (270 GeV/c) in the experiment WA89 at CERN. The acceptance of the detector should allow tagging these hyperons in a large momentum range (± 25%) and for a beam divergence up to 250 microrad. The first part of this report is devoted to the physical goals such as the study of charmed baryons, the search of multiquark states, and the determination of hadronic and electromagnetic hyperon radii. The experimental WA89 setup is also presented. The major part deals with the design of the Cerenkov counter. The dimension of the detector, the Cerenkov angle value, the focal length of the spherical mirror, etc... are derived from a Monte-Carlo simulation. Various methods of simple photon detection (gaz detector: TEA, TMAE; solid detectors: PM and Image Intensifier) are investigated. The most performing solution uses two conical mirrors in order to reduce the size of the Cerenkov circles and an image intensifier (which detects the single photon) followed by an optical fiber matrix transmitting the luminous signal to 160 photomultipliers. The on line procedure for calculating the radius of each circle (identification of the particle) is studied in detail. Finally, the optimization of the optical system to achromatize the Cerenkov light is discussed

  3. Confirmation and Readjustment of Bending Magnet Beam-Line Optics Using SHADOW

    Science.gov (United States)

    Matsubara, Takahiro; Kanda, Kazuhiro; Kato, Yuri; Hisao, Shintarou; Shoji, Yoshihiko

    2007-01-01

    Optical alignment of the NewSUBARU beam-line 6 (BL6) is discussed by comparing the observed SR profiles with the calculated results of ray-tracing using SHADOW. A new screen monitor was mounted downstream of the first mirror to observe the synchrotron radiation profile. The distorted profile downstream of the second mirror was attributed to the rotation of the first mirror along the vertical axis. The distortion was successfully improved by a re-adjustment according to the calculations.

  4. Confirmation and Readjustment of Bending Magnet Beam-Line Optics Using SHADOW

    International Nuclear Information System (INIS)

    Optical alignment of the NewSUBARU beam-line 6 (BL6) is discussed by comparing the observed SR profiles with the calculated results of ray-tracing using SHADOW. A new screen monitor was mounted downstream of the first mirror to observe the synchrotron radiation profile. The distorted profile downstream of the second mirror was attributed to the rotation of the first mirror along the vertical axis. The distortion was successfully improved by a re-adjustment according to the calculations

  5. The development of an expert system to tune a beam line

    International Nuclear Information System (INIS)

    The experience of developing an Expert System to aid in the tuning of the Ion Source Injection beam line at TRIUMF is described. The challenging and complex task of introducing Expert System technology into an established accelerator operation is outlined. Success in this environment depends strongly on the choice of project, the choice of experts, the choice of tools, and the methods used to represent the expertise. All these choices are discussed

  6. Longitudinal motion in bunch compression and in the external beam line

    International Nuclear Information System (INIS)

    Heavy ion fusion simulation experiments on the SNS synchrotron in the fields of; momentum spread increase during debunching, storage ring bunch compression experiments at 70.44 MeV, and, briefly, longitudinal motion in external beam line, were evaluated qualitatively. Certain features that need attention were noted but overall it was concluded that the proposed experiments on the SNS would yield considerable insight into HIF drivers. (U.K.)

  7. Use of object-oriented techniques in a beam-line control system

    International Nuclear Information System (INIS)

    The authors describe the use of object-oriented programming in the control and data-acquisition system for the upgraded CERN neutrino beam-line. C++ in conjunction with Posix threads running under Lynx-OS have been used in several front-end PCs. These communicate using Remote Procedure Calls over ethernet with a workstation running the commercial supervisory package, FactoryLink

  8. Off-line production of intense 7,10Be+ beams

    International Nuclear Information System (INIS)

    7Be and 10Be were produced by 590 MeV proton bombardment of a graphite target at PSI. Parts of this graphite target were transferred into an ISOLDE target and ion source unit and ionized with the ISOLDE resonance ionization laser ion source. Thus intense radioactive ion beams of 300 nA of 7,10Be+ were produced off-line

  9. The Cornell University cold neutron beam facility: Design features

    International Nuclear Information System (INIS)

    An ultra-low-background facility for basic and applied neutron beam research is being built at the Cornell 500-kW TRIGA reactor. The beam is to be obtained by a curved 13-m neutron guide to filter out fast neutrons and gamma rays from the core, with the neutrons entering the 2-cm by 5-cm guide coming from a cold neutron source of mesitylene at ∼40K to increase transmission through the guide. Optimization of the cold source, within the limits set by design criteria and geometrical restrictions, has involved Monte Carlo simulations to choose source shape and size, and measurements and estimation of nuclear heating and shielding requirements have been made. The design criteria, which include considerations of simplicity and safety of cold source operation at a medium-power reactor on a university campus, are described. Results to date of design studies and low-power trials are presented. Final design choices are imminent and completion of the facility is anticipated for early fall 1990

  10. LISE++: Exotic beam production with fragment separators and their design

    Science.gov (United States)

    Tarasov, O. B.; Bazin, D.

    2016-06-01

    Since the LISE++ code presentation at the EMIS 2007 conference (Tarasov and Bazin, 2008), important improvements have been made in the analytical and Monte Carlo calculations of transmission, and accuracy of reaction product distributions. In this paper new features of the code in ion-beam optics, creation of new LISE++ blocks, and development of some reaction models will be discussed. Large progress has been done in ion-beam optics with the introduction of "elemental" blocks, that allows optical matrices calculation within LISE++. New type of configurations based on these blocks allow a detailed analysis of the transmission, useful for fragment separator design, and can be used for optics optimization based on user constraints.

  11. Automation of beam based alignment for the PAL-XFEL undulator line

    International Nuclear Information System (INIS)

    An automated method of quadrupole beam based alignment in an X-ray free electron laser (XFEL) undulator line is proposed. To realize the automatic beam based alignment (BBA) independently of operator's skill and efforts, the procedure is simplified. Simulation results on the BBA technique using two alignment stages for the Pohang Accelerator Laboratory XFEL's (PAL-XFEL) undulator line is carried out. After a standard mechanical alignment the quadrupoles are expected to be aligned to 100 μm rms from our previous experience. A rough alignment method in this study is able to align the quadrupoles to about 40 μm rms without any pre-handling of electron beam orbit or quadrupoles position. At the second stage, the singular value decomposition (SVD) method is applied to perform a fine alignment in which the trajectory of an electron beam is controlled within 5 μm rms to the ideal orbit. All procedures are programmable to perform the BBA automatically

  12. Conceptual design of light ion beam inertia nuclear fusion reactors

    International Nuclear Information System (INIS)

    Light ion beam, inertia nuclear fusion system drew attention recently as one of the nuclear fusion systems for power reactors in the history of the research on nuclear fusion. Its beginning seemed to be the judgement that the implosion of fusion fuel pellets with light ions can be realized with the light ions which can be obtained in view of accelerator techniques. Of course, in order to generate practically usable nuclear fusion reaction by this system and maintain it, many technical difficulties must be overcome. This research was carried out for the purpose of discovering such technical problems and searching for their solution. At the time of doing the works, the following policy was adopted. Though their is the difference of fine and rough, the design of a whole reactor system is performed conformably. In order to make comparison with other reactor types and nuclear fusion systems, the design is carried out as the power plant of about one million kWe output. As the extent of the design, the works at conceptual design stage are performed to present the concept of design which satisfies the required function. Basically, the design is made from conservative standpoint. This research of design was started in 1981, and in fiscal 1982, the mutual adjustment among the design of respective parts was performed on the basis of the results in 1981, and the possible revision and new proposal were investigated. (Kako, I.)

  13. Start-up of beam emittance shaping line of the NIIYaF MGU continuous action racetrack microtron

    International Nuclear Information System (INIS)

    Results of start-up of longitudinal and transverse emittance shaping line for 100 keV and up to 10 mA electron beam of aracetrack microtron are presented. The shaping line includes electron gun, magnetic lenses, correctors, vacuum seal, profile monitor. The line permit to obtain 10-15 deg of bunching. 6 refs.; 3 figs

  14. Design of neutral beam injection power supplies for ITER

    Energy Technology Data Exchange (ETDEWEB)

    Watanabe, Kazuhiro; Okumura, Yoshikazu [Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment; Higa, Osamu; Kawashima, Syuichi [Toshiba Corp., Kawasaki, Kanagawa (Japan); Ono, Youichi; Tanaka, Masanobu [Hitachi Ltd., Tokyo (Japan)

    2000-03-01

    Design study on a power supply system for the ITER neutral beam injector(NBI) has been performed. Circuits of converter/inverter system and other components of the acceleration power supply whose capacity is 1 MV, 45 A have been designed in detail. Performance of the negative ion production power supplies such as an arc and an extraction power supplies was investigated using the EMTDC code. It was confirmed that ripples of 0.34%p-p for the extraction power supply and 1.7%p-p for the arc power supply are small enough. It was also confirmed that an energy input to a negative ion generator from the arc power supply at an arcing can be suppressed smaller than 8 J. The extraction power supply was designed to suppress the energy input lower than 13 J at the breakdown in the extractor. These performances satisfy the required specification of the power supply system. (author)

  15. The FCC-ee design study: luminosity and beam polarization

    CERN Document Server

    Koratzinos, M

    2015-01-01

    The FCC-ee accelerator is considered within the FCC design study as a possible first step towards the ultimate goal of a 100 TeV hadron collider. It is a high luminosity e+e- storage ring collider, designed to cover energies of around 90, 160, 240 and 350GeV ECM (for the Z peak, the WW threshold, the ZH and ttbar cross-section maxima respectively) leading to different operating modes. We report on the current status of the design study, on the most promising concepts and relevant challenges. The expected luminosity performance at all energies, and first studies on transverse polarization for beam energy calibrations will be presented.

  16. A steering magnet optimized by random search method for high current beam transport line

    International Nuclear Information System (INIS)

    We present an improved design of the steering magnet which produces almost uniform magnetic field in the region through which beam passes. Optimization of the parameters of the steering magnet is done by random search method. It is shown that use of a suitable shim reduces the field deviation by a great extent. (author)

  17. In-beam PET imaging for on-line adaptive proton therapy: an initial phantom study

    International Nuclear Information System (INIS)

    We developed and investigated a positron emission tomography (PET) system for use with on-line (both in-beam and intra-fraction) image-guided adaptive proton therapy applications. The PET has dual rotating depth-of-interaction measurable detector panels by using solid-state photomultiplier (SSPM) arrays and LYSO scintillators. It has a 44 mm diameter trans-axial and 30 mm axial field-of-view (FOV). A 38 mm diameter polymethyl methacrylate phantom was placed inside the FOV. Both PET and phantom axes were aligned with a collimated 179.2 MeV beam. Each beam delivered ∼50 spills (0.5 s spill and 1.5 s inter-spill time, 3.8 Gy at Bragg peak). Data from each beam were acquired with detectors at a given angle. Nine datasets for nine beams with detectors at nine different angles over 180° were acquired for full-tomographic imaging. Each dataset included data both during and 5 min after irradiations. The positron activity-range was measured from the PET image reconstructed from all nine datasets and compared to the results from simulated images. A 22Na disc-source was also imaged after each beam to monitor the PET system's performance. PET performed well except for slight shifts of energy photo-peak positions (<1%) after each beam, due mainly to the neutron exposure of SSPM that increased the dark-count noise. This minor effect was corrected offline with a shifting 350–650 keV energy window for each dataset. The results show a fast converging of activity-ranges measured by the prototype PET with high sensitivity and uniform resolution. Sub-mm activity-ranges were achieved with minimal 6 s acquisition time and three spill irradiations. These results indicate the feasibility of PET for intra-fraction beam-range verification. Further studies are needed to develop and apply a novel clinical PET system for on-line image-guided adaptive proton therapy. (paper)

  18. In-beam PET imaging for on-line adaptive proton therapy: an initial phantom study

    Science.gov (United States)

    Shao, Yiping; Sun, Xishan; Lou, Kai; Zhu, Xiaorong R.; Mirkovic, Dragon; Poenisch, Falk; Grosshans, David

    2014-07-01

    We developed and investigated a positron emission tomography (PET) system for use with on-line (both in-beam and intra-fraction) image-guided adaptive proton therapy applications. The PET has dual rotating depth-of-interaction measurable detector panels by using solid-state photomultiplier (SSPM) arrays and LYSO scintillators. It has a 44 mm diameter trans-axial and 30 mm axial field-of-view (FOV). A 38 mm diameter polymethyl methacrylate phantom was placed inside the FOV. Both PET and phantom axes were aligned with a collimated 179.2 MeV beam. Each beam delivered ˜50 spills (0.5 s spill and 1.5 s inter-spill time, 3.8 Gy at Bragg peak). Data from each beam were acquired with detectors at a given angle. Nine datasets for nine beams with detectors at nine different angles over 180° were acquired for full-tomographic imaging. Each dataset included data both during and 5 min after irradiations. The positron activity-range was measured from the PET image reconstructed from all nine datasets and compared to the results from simulated images. A 22Na disc-source was also imaged after each beam to monitor the PET system's performance. PET performed well except for slight shifts of energy photo-peak positions (<1%) after each beam, due mainly to the neutron exposure of SSPM that increased the dark-count noise. This minor effect was corrected offline with a shifting 350-650 keV energy window for each dataset. The results show a fast converging of activity-ranges measured by the prototype PET with high sensitivity and uniform resolution. Sub-mm activity-ranges were achieved with minimal 6 s acquisition time and three spill irradiations. These results indicate the feasibility of PET for intra-fraction beam-range verification. Further studies are needed to develop and apply a novel clinical PET system for on-line image-guided adaptive proton therapy.

  19. Beam transport radiation shielding for branch lines 2-ID-B and 2-ID-C

    International Nuclear Information System (INIS)

    The x-ray radiation shielding requirements beyond the first optics enclosure have been considered for the beam transport of the 2-ID-B and 2-ID-C branch lines of Sector 2 (SRI-CAT) of the APS. The first three optical components (mirrors) of the 2-ID-B branch are contained within the shielded first optics enclosure. Calculations indicate that scattering of the primary synchrotron beam by beamline components outside the enclosure, such as apertures and monochromators, or by gas particles in case of vacuum failure is within safe limits for this branch. A standard 2.5-inch-diameter stainless steel pipe with 1/16-inch-thick walls provides adequate shielding to reduce the radiation dose equivalent rate to human tissue to below the maximum permissible limit of 0.25 mrem/hr. The 2-ID-C branch requires, between the first optics enclosure where only two mirrors are used and the housing for the third mirror, additional lead shielding (0.75 mm) and a minimum approach distance of 2.6 cm. A direct beam stop consisting of at least 4.5 mm of lead is also required immediately downstream of the third mirror for 2-ID-C. Finally, to stop the direct beam from escaping the experimental station, a beam stop consisting of at least 4-mm or 2.5-mm steel is required for the 2-ID-B or 2-ID-C branches, respectively. This final requirement can be met by the vacuum chambers used to house the experiments for both branch lines

  20. Atlas transmission line/transition design and fabrication status

    CERN Document Server

    Ballard, E O; Davis, H A; Elizondo, J M; Gribble, R F; Nielsen, K E; Parker, G V; Ricketts, R L; Valdez, G A

    1999-01-01

    Atlas is a pulsed-power facility under development at Los Alamos National Laboratory to drive high-energy density experiments. Design has been completed for this new generation pulsed-power machine consisting of an azimuthal array of 24, 240-kV Marx modules and transmission lines supplying current to the load region at the machine center. The transmission line consists of a cable header, load protection switch, and tri-plate assembly interfacing to the center transition section. The cable header interface to the Marx module provides a mechanism to remove the Marx module for maintenance without removing other components of the transmission line. The load protection switch provides a mechanism for protecting the load during charging of the Marx in the event of a pre-fire condition. The aluminum tri-plate is a low-inductance transmission line that carries radial current flow from the Marx energy storage system at the machine periphery toward the load. All transmission line components are oil insulated except the...

  1. An Ergonomics Study on Assembly Line Workstation Design

    OpenAIRE

    Baba M. DEROS; Nor K. Khamis; Ahmad R. Ismail; Haris Jamaluddin; Azmi M. Adam; Sarudin v

    2011-01-01

    Problem statement: High demand for products in the manufacturing industry had driven the human workers to work faster and adapt to their un-ergonomically designed workstation. Some tasks at assembly workstations require human workers to stand for a prolonged period of time to assemble the products. Approach: This study was conducted at an automotive component manufacturer. Twenty full time workers working at the assembly line participated as subjects in this study. Observations were made and ...

  2. Pencil-Beam Single-point-fed Dirac Leaky-Wave Antenna on a Transmission-Line Grid

    CERN Document Server

    Dorrah, Ayman H

    2016-01-01

    Leaky-wave antennas (LWAs) are widely used as single-point-fed linear antenna arrays. The extension of LWAs to 2D implies that they can be used as single-point-fed 2D antenna arrays without requiring a complex feeding network. However, generating a pencil beam from 2D LWAs is not straightforward and due care has to be taken for the design of the LWA. On the other hand, transmission-line (TL) grids have demonstrated interesting behaviors, such as an effective negative refractive index and growing of evanescent waves. In this paper, a singlepoint-fed TL-grid 2D Dirac leaky-wave antenna (DLWA) design is proposed that generates a pencil beam at both broadside and slightly tilted angles. The TL-grid unit cell is analytically treated in light of its scattering and impedance matrices. The optimized TL-grid unit cell is shown to exhibit a closed bandgap in the dispersion relation which is also linearly varying with frequency (hence it is a DLWA). The proposed 2D DLWA design is fabricated and the experimental results ...

  3. Scenario for concurrent conceptual assembly line design: A case study

    Science.gov (United States)

    Mas, F.; Ríos, J.; Menéndez, J. L.

    2012-04-01

    The decision to design and build a new aircraft is preceded by years of research and study. Different disciplines work together throughout the lifecycle to ensure not only a complete functional definition of the product, but also a complete industrialization, a marketing plan, a maintenance plan, etc. This case study focuses on the conceptual design phase. During this phase, the design solutions that will meet the functional and industrial requirements are defined, i.e.: the basic requirements of industrialization. During this phase, several alternatives are studied, and the most attractive in terms of performance and cost requirements is selected. As a result of the study of these alternatives, it is possible to define an early conceptual design of the assembly line and its basic parameters. The plant needs, long cycle jigs & tools or industrial means and human resources with the necessary skills can be determined in advance.

  4. On-line neutron monitoring system of epithermal neutron beam for BNCT at THOR

    International Nuclear Information System (INIS)

    This paper aims to introduce the on-line neutron monitoring system (NMS) of epithermal neutron beam for BNCT at THOR and following tests. The NMS consists of three miniature fission chambers (Centronic, FC4A) and one gamma-ray monitor. The data acquisition and display are controlled by an in-house graphical user interface program. Both the real-time counting rates and the accumulated counts will be displayed simultaneously during irradiation. When the accumulated count reaches a preset value, the NMS will send a signal to the reactor operator to shut down the reactor. Examinations have been performed to demonstrate the system's reliability and linearity for desired reactor power range. The neutron counting rates were calibrated to the reaction rate of the gold foil measured free-in-air at the beam outlet center. By using the on-line NMS, an unstable fluctuation and long-term depression of epithermal neutron beam intensity was observed. It is suggested to normalize each performed irradiation by the average reading of the NMS. (author)

  5. Beam optics and lattice design for particle accelerators

    CERN Document Server

    Holzer, Bernhard J

    2013-01-01

    The goal of this manuscript is to give an introduction into the design of the magnet lattice and as a consequence into the transverse dynamics of the particles in a synchrotron or storage ring. Starting from the basic principles of how to design the geometry of the ring we will briefly review the transverse motion of the particles and apply this knowledge to study the layout and optimization of the principal elements, namely the lattice cells. The detailed arrangement of the accelerator magnets within the cells is explained and will be used to calculate well defined and predictable beam parameters. The more specific treatment of low beta insertions is included as well as the concept of dispersion suppressors that are an indispensable part of modern collider rings.

  6. Conceptual design of a beam steering lens through transformation electromagnetics.

    Science.gov (United States)

    Yi, Jianjia; Burokur, Shah Nawaz; de Lustrac, André

    2015-05-18

    In this paper, based on transformation electromagnetics, the design procedure of a lens antenna, which steers the radiated beam of a patch array, is presented. Laplace's equation is adopted to construct the mapping between the virtual space and the physical space. The two dimensional (2D) design method can be extended to a potential three-dimensional (3D) realization, and with a proper parameter simplification, the lens can be further realized by common metamaterials or isotropic graded refractive index (GRIN) materials. Full wave simulations are performed to validate the proposed concept. It is observed that by placing the lens on a feeding source, we are able to steer the radiation emitted by the latter source. PMID:26074547

  7. Design and development of low current measurement electronics for beam diagnostics system

    International Nuclear Information System (INIS)

    Beam diagnostics devices are essential constituents of any particle accelerator. In many beam diagnostics devices such as wire beam profile monitor (wire-BPM), Faraday cup etc., low current signal processing and measurement is carried out. In this paper low current measurement using a trans-impedance amplifier, based on T-network topology of feedback resistors is presented. This technique employs a T-network of relatively lower value resistors in the feedback path of op-amp to achieve high gain without requiring high value resistors which have associated leakage problems. The designed low current signal processing electronics based on this technique can linearly measure current signal in the rage of 100pA to 1μA, To accommodate wide range of current measurement, four selectable gains of trans-impedance amplifier have been incorporated in the circuit. The microcontroller based processing electronics monitors the real time low current signal, then automatically switches the appropriate gain to match the input current for its accurate measurement. It has been tested and calibrated successfully in lab with standard low current source. The processing electronics has also been tested and verified for current signal measurement of a wire-BPM installed at the visible diagnostic beam line (BL-24) of Indus-2, synchrotron light source at RRCAT, Indore. (author)

  8. The design and initial testing of a beam phase and energy measurement for LEDA

    International Nuclear Information System (INIS)

    A diagnostic system being designed to measure the beam phase and beam energy of the Low Energy Demonstration Accelerator (LEDA) is described and the characterization of the prototype presented. The accelerator, being built at LANL, is a 350 MHz proton linac with a 100 mA beam. In the first beam experiments, the 6.7 MeV RFQ will be characterized. Signals received from an rf cavity probe in the RFQ and capacitive pick-ups along the high-energy beam transport line will be compared in phase in order to calculate the beam phase and energy. The 350 MHz signals from four pick-ups will be converted to 2 MHz in a VXI-based down converter module. A second VXI phase processor module makes two, differential-phase measurements based on its four 2 MHz inputs. The heart of this system is the phase processor module. The phase processor consists of an analog front end (AFE), digital front end (DFE), digital signal processing (DSP) modules and the VXI bus interface. The AFE has an AGC circuit with a >60 dB dynamic range with a few degrees of phase shift. Following the AFE is the DFE which uses an in-phase and quadrature-phase (I and Q) technique to make the phase measurement. The DSP is used to correct the real-time data for phase variations as a function of dynamic range and system offsets. The prototype phase module gives an absolute accuracy of ±0.5 degrees with a resolution of <0.1 degrees and a bandwidth of 200 kHz. copyright 1998 American Institute of Physics

  9. PERFORMING DIAGNOSTICS ON THE SPALLATION NEUTRON SOURCE VISION BEAM LINE TO ELIMINATE HIGH VIBRATION LEVELS AND PROVIDE A SUSTAINABLE OPERATION

    Energy Technology Data Exchange (ETDEWEB)

    Van Hoy, Blake W [ORNL

    2014-01-01

    The Spallation Neutron Source (SNS) at the Oak Ridge National Laboratory (ORNL) provides variable energy neutrons for a variety of experiments. The neutrons proceed down beam lines to the experiment hall, which houses a variety of experiments and test articles. Each beam line has one or more neutron choppers which filter the neutron beam based on the neutron energy by using a rotating neutron absorbing material passing through the neutron beam. Excessive vibration of the Vision beam line, believed to be caused by the T0 chopper, prevented the Vision beam line from operating at full capacity. This problem had been addressed several times by rebalancing/reworking the T0 beam chopper but the problem stubbornly persisted. To determine the cause of the high vibration, dynamic testing was performed. Twenty-seven accelerometer and motor current channels of data were collected during drive up, drive down, coast down, and steady-state conditions; resonance testing and motor current signature analysis were also performed. The data was analyzed for traditional mechanical/machinery issues such as misalignment and imbalance using time series analysis, frequency domain analysis, and operating deflection shape analysis. The analysis showed that the chopper base plate was experiencing an amplified response to the excitation provided by the T0 beam chopper. The amplified response was diagnosed to be caused by higher than expected base plate flexibility, possibly due to improper grouting or loose floor anchors. Based on this diagnosis, a decision was made to dismantle the beam line chopper and remount the base plate. Neutron activation of the beam line components make modifications to the beam line especially expensive and time consuming due to the radiation handling requirements, so this decision had significant financial and schedule implications. It was found that the base plate was indeed loose because of improper grouting during its initial installation. The base plate was

  10. A proposal of particle beam engineering in some 100 MeV energy field used beam line of accelerator-driven transmutation experimental facility

    International Nuclear Information System (INIS)

    To develop the researches of particle beam engineering in the middle energy field, construction of 'particle beam engineering experimental device' in the nuclear transmutation physics experimental facility of the High-Intensity Proton Accelerator Facility was investigated and proposed. The basis of proposal is experiments using short pulse proton beam (<1ns) produced by laser charge exchange method and construction of two targets: one is the low power target (10 W) for proton beam experiments and other the high power target (1kW) for neutron induced reaction experiments. This facility consists of target chamber, target exchange device, beam dump, some neutron TOF lines. This facility pressed forward the important experiments in the middle energy field such as basic data of proton and neutron in the nuclear transmutation physics and engineering, effects and elementary process of cosmic radiation, basic test of application of particle beam to medical treatment and development and characteristics test of detector. (S.Y.)

  11. The Device to Measure Currents in External Beam Transportation Lines of the DC-72 Cyclotron

    CERN Document Server

    Gulbekyan, G G; Gall, A; Kalagin, I V; Timoshenko, G N; Pachadzhiev, K K

    2002-01-01

    The present work is devoted to the development of a device to measure ion currents in external beam transportation lines of the DC-72 cyclotron, which is being created for the Cyclotron Centre of the Slovak Republic. The device is based on a Faraday cup. As possible constructive materials for the Faraday cup, Al, Cu, Fe, W and C were considered from the point of view of both the residual radiation and heating by the proton beam of the 3 kW power. Based on the calculations performed. It was suggested to use aluminium. The results of calculations of the temperature distribution in cylindrical and conic cups have been presented, both for a proton energy of 30 MeV at a beam power of 3 kW, and for a proton energy of 72 MeV at a beam power of 2.5 kW. Also presented are the results of calculation of the construction with permanent magnets that create sufficient magnetic field to eliminate the influence of secondary electrons emission on the current measurement accuracy. As a result, a sketch of the device constructi...

  12. The external proton beam lines and the splitter systems of the CERN SPS

    CERN Document Server

    Evans, Lyndon R; Ijspeert, Albert; de Raad, Bastiaan; Siegel, N; Weisse, E

    1977-01-01

    The exploitation of the CERN Super Proton Synchrotron (SPS) is based on two experimental areas, the West Area and the North Area. The West Area consists of the West Experimental Hall, fed by a slow ejected proton beam of 200 GeV/c maximum momentum and a Neutrino Facility which is fed by protons of 400 GeV/c. Several important detectors are installed in the West Area, the Omega spectrometer, the Big European Bubble Chamber and the heavy liquid bubble chamber Gargamelle. The North Area has been built for physics at 400 GeV/c. At present it consists of two experimental halls, a large multipurpose hall and a smaller hall dedicated to muon physics. The protons are extracted from the SPS in two of the six long straight sections (LSS) and are transported from the underground machine through a system of tunnels to the external targets. Both the beam lines to the West and North Area contain beam splitting stations which divide the slow extracted proton beam into three branches. (0 refs).

  13. Target and orbit feedback simulations of a muSR beam line at BNL

    Energy Technology Data Exchange (ETDEWEB)

    MacKay, W. [Brookhaven National Lab. (BNL), Upton, NY (United States); Blaskiewicz, M. [Brookhaven National Lab. (BNL), Upton, NY (United States); Fischer, W. [Brookhaven National Lab. (BNL), Upton, NY (United States); Pile, P. [Brookhaven National Lab. (BNL), Upton, NY (United States)

    2015-07-28

    Well-polarized positive surface muons are a tool to measure the magnetic properties of materials since the precession rate of the spin can be determined from the observation of the positron directions when the muons decay. For a dc beam an ideal µSR flux for surface µ+ should be about 40 kHz/mm2. In this report we show how this flux could be achieved in a beam line using the AGS complex at BNL for a source of protons. We also determined that an orbit feedback system with a pair of thin silicon position monitors and kickers would miss the desired flux by at least an order of magnitude, even with perfect time resolution and no multiple scattering.

  14. Beam line control system for BARC-TIFR super conducting linac booster

    International Nuclear Information System (INIS)

    LINAC control system is a distributed control system. Hardware is distributed geometrically for RF control and monitoring with four nodes for RF control. Systematic distribution is applied by addition of different node for Beam line instrument control (BLS) which consists of different focussing magnets, steerers and beam diagnostics devices (Faraday cups and BPMs) and magnetic field measurement devices hall probes. All the focussing and diagnostics devices have their built-in microprocessor based electronic interfaces, which can be remotely accessed by RS 232/RS 422 link. The serial devices are connected to three different 16 port RS232 to Ethernet converter switch, which are connected to LINAC lab by Ethernet link. Multilevel software is developed in JAVA, with useful and attractive virtual panel interface provided by monitor and keyboard. (author)

  15. A new on-line luminometer and beam conditions monitor using single crystal diamond sensors

    CERN Document Server

    Karacheban, Olena

    2015-01-01

    Instrumentation near the beam-pipe requires extremely radiation hardsensors. Inside CMS two rings instrumented with 12 single crystal diamondsensors each are installed on both sides of the interaction point. Thesensors are subdivided in two pads, and each pad is read out by adedicated fast radiation hard ASIC in 130 nm CMOS technology.Due to the excellent time resolution collision products will be separatedfrom machine induced background. In the backend a dead-time lesshistogramming unit is udsed, and a fast microTCA system with GHz samplingrate is under development.The detector will measure both the on-line luminosity and the backgroundbunch-by-bunch.The performance of a prototype detector in a test-beam will be reported,and results from the operation during data taking will be presented.

  16. A new on-line luminometer and beam conditions monitor using single crystal diamond sensors

    CERN Document Server

    CMS Collaboration

    2015-01-01

    Instrumentation near the beam-pipe requires extremely radiation hard sensors. Inside CMS two rings instrumented with 12 single crystal diamond sensors each are installed on both sides of the interaction point. The sensors are subdivided in two pads, and each pad is read out by a dedicated fast radiation hard ASIC in 130 nm CMOS technology. Due to the excellent time resolution collision products will be separated from machine induced background. In the backend a dead-time less histogramming unit is used, and a fast microTCA system with GHz sampling rate is under development. The detector will measure both the on-line luminosity and the background bunch-by-bunch. The performance of a prototype detector in a test-beam will be reported, and results from the operation during data taking will be presented.

  17. Development and characterization of grounded grid triode amplifier for re-buncher of Radioactive Ion Beam line of VECC

    International Nuclear Information System (INIS)

    A radio frequency amplifier of 3.0 kW/37.8 MHz has been indigenously designed and developed for a re-buncher in the post-acceleration beam line of the RIB facility at VECC. The buncher cavity is a 37.8 MHz quarter-wave resonator shorted at one end and loaded by capacitive drift tubes at the open end. It is placed in the beam line between the RFQ and first 1H-LINAC. The 3 kW power is good enough to produce the maximum required RF voltage inside the buncher cavity. To build a 3 kW amplifier at 37.8 MHz frequency, two stages of amplifications is required. The first stage is a 300 W Solid State Amplifier (SSA) as driver followed by a 3 kW triode tube amplifier as the final stage. The final stage amplifier is a class AB amplifier designed using triode 3CX5000A7 in grounded grid configuration. The input and output impedances were computed after fixing the biasing condition and networks which are LC networks were variable type. The triode cage and proper forced air cooling arrangement with RF filter blocks has been developed. An indigenously developed DC power supplies for Anode (4.5kV/3A), Grid (-100 V/0.5A) and Filament (10V/24A) have been used. The amplifier has been successfully tested and operated up to 2 kW in CW mode with 15 dB gain. At the same time the amplifier is also tested up to 3.0 kW in pulse mode with 50% duty cycle and being tuned to achieve 3.0 kW in CW. Some measured parameters of this amplifier is given. This paper describes the detail design, test and measurement report of the amplifier system. (author)

  18. Design and Analysis of Parallel-Coupled Line Bandpass Filter

    Directory of Open Access Journals (Sweden)

    Talib Mahmood Ali

    2013-09-01

    Full Text Available A compact microwave parallel coupled line resonator seventh order bandpass filter (BPF is presented in this paper, consist a 8-parallel coupled line pairs designed for a maximally flat response or Butterworth response at a center frequency of 2.44175 GHz and with a fractional bandwidth, Δ= 0.035. The filter was implemented in a microstrip platform with a permittivity of the substrate Er=4.4 and a substrate height h=1.5mm. The physical parameters of the parallel coupled line filter sections were optimized using the Microwave Office software to provide the closest values of the bandpass filter prototype values and electrical lengths for a given set of filter specifications. The simulation of direct calculation, show the attenuation S11 response was observed at 2.44175 GHz with a value of -25 dB and the corresponding Insertion Loss S21 is - 1.8dB while the optimized design S11 response at the centre frequency with a value of -113 dB and the corresponding Insertion Loss S21 is -2.2dB.

  19. Designing effective on-line continuing medical education.

    Science.gov (United States)

    Zimitat, Craig

    2001-03-01

    The Internet, and new information and communication technologies available through the Internet, provides medical educators with an opportunity to develop unique on-line learning environments with real potential to improve physicians' knowledge and effect change in their clinical practice. There are approximately 100 websites offering on-line CME courses in the USA alone. However, few of these CME courses appear to be based on sound educational principles or CME research and may have little chance of achieving the broader goals of CME. The majority of these courses closely resemble their traditional counterparts (e.g. paper-based books are now electronic books) and appear to be mere substitutions for old-technology CME resources. Whilst some CME providers add unique features of the Internet to enrich their websites, they do not employ strategies to optimize the learning opportunities afforded by this new technology. The adoption of adult learning principles, reflective practice and problem-based approaches can be used as a foundation for sound CME course design. In addition, knowledge of Internet technology and the learning opportunities it affords, together with strategies to maintain participation and new assessment paradigms, are all needed for developing online CME. We argue for an evidence-based and strategic approach to the development of on-line CME courses designed to enhance physician learning and facilitate change in clinical behaviour. PMID:11371287

  20. Design of a Standing-Wave Multi-Cavity Beam-Monitor for Simultaneous Beam Position and Emittance Measurements

    International Nuclear Information System (INIS)

    A high precision emittance measurement requires precise beam position at the measurement location. At present there is no existing technique, commercial or otherwise, for non-destructive pulse-to-pulse simultaneous beam position and emittance measurement. FARTECH, Inc. is currently developing a high precision cavity-based beam monitor for simultaneous beam position and emittance measurements pulse-to-pulse, without beam interception and without moving parts. The design and analysis of a multi-cavity standing wave structure for a pulse-to-pulse emittance measurement system in which the quadrupole and the dipole standing wave modes resonate at harmonics of the beam operating frequency is presented. Considering the Next Linear Collider beams, an optimized 9-cavity standing wave system is designed for simultaneous high precision beam position and emittance measurements. It operates with the π-quadrupole mode resonating at 16th harmonic of the NLC bunch frequency, and the 3 π/4 dipole mode at 12th harmonic (8.568 GHz). The 9-cavity system design indicates that the two dipoles resonate almost at the same frequency 8.583 GHz and the quadrupole at 11.427 GHz according to the scattering parameter calculations. The design can be trivially scaled so that the dipole frequency is at 8.568 GHz, and the quadrupole frequency can then be tuned during fabrication to achieve the desired 11.424 GHz. The output powers from these modes are estimated for the NLC beams. An estimated rms-beam size resolution is sub micro-meters and beam positions in sub nano-meters

  1. A Summary of Design Formulas for Beams Having Thin Webs in Diagonal Tension

    Science.gov (United States)

    Kuhn, Paul

    1933-01-01

    This report presents an explanation of the fundamental principles and a summary of the essential formulas for the design of diagonal-tension field beams, i.e. beams with very thin webs, as developed by Professor Wagner of Germany.

  2. Coulomb field strength measurement by electro-optic spectral decoding system at the CALIFES beam line

    CERN Document Server

    Pan, R; Lefevre, T; Gillepsie, WA; CERN. Geneva. ATS Department

    2015-01-01

    Electro-optic (EO) techniques are increasingly used for longitudinal bunch profile measurements. A bunch profile monitor, based on electro-optic spectral decoding(EOSD), has been developed and demonstrated on the CALIFES beam line at CERN. The EO response is analysed using a frequency domain description, and two methods for extraction of absolute Coulomb field strengths from the electron bunch are demonstrated. Measurements at field strengths up to 1.3 MV/m agree with the expectation based on independent charge measurements.

  3. 100 years of Elementary Particles [Beam Line, vol. 27, issue 1, Spring 1997

    Science.gov (United States)

    Pais, Abraham; Weinberg, Steven; Quigg, Chris; Riordan, Michael; Panofsky, Wolfgang K. H.; Trimble, Virginia

    1997-04-01

    This issue of Beam Line commemorates the 100th anniversary of the April 30, 1897 report of the discovery of the electron by J.J. Thomson and the ensuing discovery of other subatomic particles. In the first three articles, theorists Abraham Pais, Steven Weinberg, and Chris Quigg provide their perspectives on the discoveries of elementary particles as well as the implications and future directions resulting from these discoveries. In the following three articles, Michael Riordan, Wolfgang Panofsky, and Virginia Trimble apply our knowledge about elementary particles to high-energy research, electronics technology, and understanding the origin and evolution of our Universe.

  4. Coulomb field strength measurement by electro-optic spectral decoding system at the CALIFES beam line

    Science.gov (United States)

    Pan, R.; Jamison, S. P.; Lefevre, T.; Gillespie, W. A.

    2016-06-01

    Electro-optic (EO) techniques are increasingly used for longitudinal bunch profile measurements. A bunch profile monitor, based on electro-optic spectral decoding (EOSD), has been developed and demonstrated on the CALIFES beam line at CERN. The EO response is analysed using a frequency domain description, and two methods for extraction of absolute Coulomb field strengths from the electron bunch are demonstrated. Measurements at field strengths up to 1.3 MV/m agree with the expectation based on independent charge measurements.

  5. 100 years of elementary particles [Beam Line, vol. 27, issue 1, Spring 1997

    Energy Technology Data Exchange (ETDEWEB)

    Pais, Abraham; Weinberg, Steven; Quigg, Chris; Riordan, Michael; Panofsky, Wolfgang K.H.; Trimble, Virginia

    1997-04-01

    This issue of Beam Line commemorates the 100th anniversary of the April 30, 1897 report of the discovery of the electron by J.J. Thomson and the ensuing discovery of other subatomic particles. In the first three articles, theorists Abraham Pais, Steven Weinberg, and Chris Quigg provide their perspectives on the discoveries of elementary particles as well as the implications and future directions resulting from these discoveries. In the following three articles, Michael Riordan, Wolfgang Panofsky, and Virginia Trimble apply our knowledge about elementary particles to high-energy research, electronics technology, and understanding the origin and evolution of our Universe.

  6. SCADA for microtron and beam transport line radio therapy machine subsystem

    International Nuclear Information System (INIS)

    Centre for Advanced Technology is developing a Radio Therapy Machine (RTM) to be used for cancer treatment. The radiotherapy machine has a Microtron consisting of a RF system, main and auxiliary magnets. It has a Beam transport line (BTL) consisting of fourteen magnets. This paper describes a PC based supervisory control and data acquisition system (SCADA) developed for controlling mainly the power supplies for the above sub systems from a remote location. It offers a graphic user interface (GUI) at the control room PC for RTM operation in engineering mode

  7. 100 years of elementary particles [Beam Line, vol. 27, number 1, Spring 1997

    International Nuclear Information System (INIS)

    This issue of Beam Line commemorates the 100th anniversary of the April 30, 1897 report of the discovery of the electron by J.J. Thomson and the ensuing discovery of other subatomic particles. In the first three articles, theorists Abraham Pais, Steven Weinberg, and Chris Quigg provide their perspectives on the discoveries of elementary particles as well as the implications and future directions resulting from these discoveries. In the following three articles, Michael Riordan, Wolfgang Panofsky, and Virginia Trimble apply our knowledge about elementary particles to high-energy research, electronics technology, and understanding the origin and evolution of our Universe

  8. Development of an on-line control system for the RF separated hadron beams to BEBC

    International Nuclear Information System (INIS)

    An on-line control system to tune and monitor separated particle beams to the Big European Bubble Chamber is described. The system includes controls of magnetic elements, collimators, rf-separators, multiwire proportional chambers and scintillation counters. Based on a PDP-8/e computer, the development of this system from a small satellite computer linked to a PDP-15 to a disc-based operating system is described. The hardware layout of the controls and the structure of the employed software are discussed. (Auth.)

  9. LDPC Code Design for Nonuniform Power-Line Channels

    Directory of Open Access Journals (Sweden)

    Sanaei Ali

    2007-01-01

    Full Text Available We investigate low-density parity-check code design for discrete multitone channels over power lines. Discrete multitone channels are well modeled as nonuniform channels, that is, different bits experience various channel parameters. We propose a coding system for discrete multitone channels that allows for using a single code over a nonuniform channel. The number of code parameters for the proposed system is much greater than the number of code parameters in conventional channel. Therefore, search-based optimization methods are impractical. We first formulate the problem of optimizing the rate of an irregular low-density parity-check code, with guaranteed convergence over a general nonuniform channel, as an iterative linear programming which is significantly more efficient than search-based methods. Then we use this technique for a typical power-line channel. The methodology of this paper is directly applicable to all decoding algorithms for which a density evolution analysis is possible.

  10. Designing of promiscuous inhibitors against pancreatic cancer cell lines

    Science.gov (United States)

    Kumar, Rahul; Chaudhary, Kumardeep; Singla, Deepak; Gautam, Ankur; Raghava, Gajendra P. S.

    2014-04-01

    Pancreatic cancer remains the most devastating disease with worst prognosis. There is a pressing need to accelerate the drug discovery process to identify new effective drug candidates against pancreatic cancer. We have developed QSAR models for predicting promiscuous inhibitors using the pharmacological data. Our models achieved maximum Pearson correlation coefficient of 0.86, when evaluated on 10-fold cross-validation. Our models have also successfully validated the drug-to-oncogene relationship and further we used these models to screen FDA approved drugs and tested them in vitro. We have integrated these models in a webserver named as DiPCell, which will be useful for screening and designing novel promiscuous drug molecules. We have also identified the most and least effective drugs for pancreatic cancer cell lines. On the other side, we have identified resistant pancreatic cancer cell lines, which need investigative scanner on them to put light on resistant mechanism in pancreatic cancer.

  11. Design of the overhead bridge crane beam and strenght analysis for given loads

    OpenAIRE

    Armán Morales, Sergio

    2012-01-01

    The main aim of the project is: for given loads, analyse and design (analytically and with Catia software) different beams for an overhead crane. For this purpose, it will be study the theory of cranes and structures calculation and from this theory I will design an algorithm that allows finding the necessary beam from de European standard metallic beam list. After obtaining the analytical and the software (Catia) results for each beam, it will be compare the results between them and presente...

  12. Development of a New RF Finger concept for vacuum beam line interconnections

    CERN Document Server

    Garion, C; Rambeau, H

    2012-01-01

    RF contact fingers are primarily used as a transition element to absorb the thermal expansion of vacuum chambers during bake-out and also to compensate for mechanical tolerances. They have to carry the beam image current to avoid the generation of Higher Order Modes and to reduce beam impedances. They are usually made out of copper beryllium thin sheets and are therefore very fragile and critical components. In this paper, a robust design based on a deformable finger concept is proposed. It allows the compensation of large longitudinal movements and also defaults such as transverse offset, twist or bending. The concept of this new RF fingers is first explained, then the design of the component is presented. The mechanical study based on a highly non-linear Finite Element model is shown as well as preliminary tests, including fatigue assessment, carried out on prototypes.

  13. HiRadMat Low Intensity Beam Commissioning

    CERN Document Server

    Blanco Sancho, J; Cornelis, K; Goddard, B; Hessler, C; Jensen, L; Kain, V; Meddahi, M; Theis, C; Vojtyla, P; Wenninger, J

    2011-01-01

    On Wednesday 22 June 2011, proton beam was sent for the first time through the HiRadMat primary beam line, onto the beam dump located in the HiRadMat experimental cavern. The aims of the beam commissioning were to check the beam line geometry and design validity, the correct functioning of all beam line equipment and to verify the beam parameters. At the first trial, the proton beam reached the end of the primary beam line and the preliminary checks allowed confirming that all beam equipment and parameters are within the specification.

  14. Design foundation of vacuum system for electron beam machine

    International Nuclear Information System (INIS)

    Vacuum system is a main part of electron beam Machine because (EBM) the electron can not be produced without this vacuum. Vacuum system consists of vacuum pump, connecting pipe, valve, and vacuum gauge. The design vacuum system of EBM, basis knowledge and technology of vacuum is needed. The paper describes types of vacuum pump, calculation of pipe conductance and pumping time of vacuum system then there are used as consideration of criteria to choose vacuum pump for EBM. From the result of study, it is concluded that for EBM of 500 keV/10 mA which is going to use for wood coating and with consideration of economic and technic factor it is better to use diffusion pump. (author)

  15. Procurement history of the hybrid undulator for the U-5 beam line at the national synchrotron light source

    International Nuclear Information System (INIS)

    As part of a national multi-institutional Materials Research Group (MRG), Argonne National Laboratory had the responsibility, under a prime contract with the US Department of Energy, of obtaining a Permanent Magnet Hybrid undulator to be used on the U5 Beam Line on the VUV Ring at the National Synchrotron Light Source (NSLS). The procurement involved determining the technical specifications of the device as well as developing an effective procedure for evaluation of the proposals. The conceptual-design of the magnetic structure including all pertinent magnetic field properties was developed before the actual procurement process was initiated. In addition, complete calculations of the expected spectral properties of the undulator were performed which included the emittance properties of the VUV ring. The results from both analysis were essential in determining the expected performance of the device and the final choice of operating parameters

  16. Project for a beam line consecrated to soft condensed matter, common heterogeneous materials and non-crystalline materials on soleil

    International Nuclear Information System (INIS)

    This project is a part of the 'SOLEIL' synchrotron project. The camera proposed is optimized for small angle x-ray scattering in the domain of soft condensed matter, common heterogeneous materials such as wood, cements, glass, and more generally non-crystalline materials. The beam line is designed to allow a quick succession of different users without time consuming adjustments. Therefore, optical settings are minimized, taking into account the pluri-disciplinary nature of the analysis possibilities. To this end, the technical requirements are as follows. First and essentially, the wave-length has to be fixed and set around 12 keV. Focusing mirrors, optics to sample and sample to detector distances, and the size of the detector allow for a wide range of wave vector to be used. Rejection rate will be lower, and angular dynamical range will be larger than any of the current synchrotron lines. We want this line to be, and to stay, complementary to more specific systems, such as reflectivity experiments or grazing angle scattering experiments. However, we are thinking of an adaptation to ultra small angle scattering mode, based on the Bonse and Hart camera. Such equipment, actually a kind of 'Instamatic' of the reciprocal space, will fulfill to the need of chemical engineers, biophysicists or material scientists interested in hard as well as soft condensed matter. It will allow a large amount of experiments per time unit. (author)

  17. Evaluation of thermal helium beam and line-ratio fast diagnostic on the National Spherical Torus Experiment-Upgrade

    Science.gov (United States)

    Muñoz Burgos, J. M.; Agostini, M.; Scarin, P.; Stotler, D. P.; Unterberg, E. A.; Loch, S. D.; Schmitz, O.; Tritz, K.; Stutman, D.

    2016-05-01

    A 1-D kinetic collisional radiative model with state-of-the-art atomic data is developed and employed to simulate line emission to evaluate the Thermal Helium Beam (THB) diagnostic on NSTX-U. This diagnostic is currently in operation on RFX-mod, and it is proposed to be installed on NSTX-U. The THB system uses the intensity ratios of neutral helium lines 667.8, 706.5, and 728.1 nm to derive electron temperature (eV) and density (cm-3) profiles. The purpose of the present analysis is to evaluate the applications of this diagnostic for determining fast ( ∽ 4 μs ) electron temperature and density radial profiles on the scrape-off layer and edge regions of NSTX-U that are needed in turbulence studies. The diagnostic is limited by the level of detection of the 728.1 nm line, which is the weakest of the three. This study will also aid in future design of a similar 2-D diagnostic system on the divertor.

  18. LIBRA - a light ion beam fusion conceptual reactor design

    International Nuclear Information System (INIS)

    The LIBRA light ion beam fusion commercial reactor study is a self-consistent conceptual design of a 330 MWe power plant with an accompanying economic analysis. Fusion targets are imploded by 4 MJ shaped pulses of 30 MeV Li ions at a rate of 3 Hz. The target gain is 80, leading to a yield of 320 MJ. The high intensity part of the ion pulse is delivered by 16 diodes through 16 separate z-pinch plasma channels formed in 100 torr of helium with trace amounts of lithium. The blanket is an array of porous flexible silicon carbind tubes with Li17Pb83 flowing downward through them. These tubes (INPORT units) shield the target chamber wall from both neutron damage and the shock overpressure of the target explosion. The target chamber is 'self-pumped' by the target explosion generated overpressure into a surge tank partially filled with Li17Pb83 that surrounds the target chamber. This scheme refreshes the chamber at the desired 3 Hz frequently without excessive pumping demands. The blanket multiplication is 1.2 and the tritium breeding ratio is 1.4. The direct capital cost of a 331 MWe LIBRA design is estimated to be 2843 Dollar/kWe while a 1200 MWe LIBRA design will cost approximately 1300 Dollar/kWe. (orig.)

  19. Design of a bio-medical negative pi-meson line at the spallation neutron source at the Rutherford Laboratory

    International Nuclear Information System (INIS)

    A design of a bio-medical beam line is presented which accepts negative pi-mesons from a transmission target in the 800 MeV extracted proton beam of the Spallation Neutron Source being constructed at the Rutherford Laboratory. Though the distribution needs refining it is shown that a pion dose of 10 rad/min may be produced over an irradiated 'peak region' of 8 x 12 cm2 x 7 cm depth at useful depths, with a lower entrance dose. This has the required characteristics for major scientific experiments and is at the lower end of the range quoted for dose rates necessary for eventual radiotherapy using pions. (author)

  20. Design and Focused Ion Beam Fabrication of Single Crystal Diamond Nanobeam Cavities

    CERN Document Server

    Babinec, T M; Smith, K J M; Khan, M; Loncar, M

    2010-01-01

    We present the design and fabrication of nanobeam photonic crystal cavities in single crystal diamond. First, we present three-dimensional finite-difference time-domain simulations of a high quality factor Q ~ 10^6 and small mode volume V ~ 0.5 ({\\lambda}/n)^3 device. Resonance wavelength was designed for 637nm, which corresponds to the zero-phonon line of the Nitrogen-Vacancy defect. Next, we demonstrate two focused ion beam (FIB) fabrication approaches for three-dimensional sculpting of thin diamond membranes and photonic crystal resonators from bulk crystals. These approaches include a diamond crystal "side-etching" procedure as well as an application of the TEM "lift-off" technique. Finally, we discuss certain aspects this technique that are a challenge to the development of high-Q/V resonators.

  1. The design, construction and performance of a variable collimator for epithermal neutron capture therapy beams

    International Nuclear Information System (INIS)

    A patient collimator for the fission converter based epithermal neutron beam (FCB) at the Massachusetts Institute of Technology Research Reactor (MITR-II) was built for clinical trials of boron neutron capture therapy (BNCT). A design was optimized by Monte Carlo simulations of the entire beam line and incorporates a modular construction for easy modifications in the future. The device was formed in-house by casting a mixture of lead spheres (7.6 mm diameter) in epoxy resin loaded with either 140 mg cm-3 of boron carbide or 210 mg cm-3 of lithium fluoride (95% enriched in 6Li). The cone shaped collimator allows easy field placement anywhere on the patient and is equipped with a laser indicator of central axis, beam's eye view optics and circular apertures of 80, 100, 120 and 160 mm diameter. Beam profiles and the collateral dose in a half-body phantom were measured for the 160 mm field using fission counters, activation foils as well as tissue equivalent (A-150) and graphite walled ionization chambers. Leakage radiation through the collimator contributes less than 10% to the total collateral dose up to 0.15 m beyond the edge of the aperture and becomes relatively more prominent with lateral displacement. The measured whole body dose equivalent of 24 ± 2 mSv per Gy of therapeutic dose is comparable to doses received during conventional therapy and is due principally (60-80%) to thermal neutron capture reactions with boron. These findings, together with the dose distributions for the primary beam, demonstrate the suitability of this patient collimator for BNCT

  2. A single-passage beam-position monitor system for the TRISTAN AR-to-MR transport lines

    International Nuclear Information System (INIS)

    A beam-position monitor (BPM) system has been installed in the transport lines between the Accumulation Ring (AR) and the Main Ring (MR) of TRISTAN. This system comprises stripline and button electrodes, detectors and charge-sensitive ADCs. The detector is a homodyne type synchronous-receiver at 70 MHz with four channels corresponding to four electrodes. Operation software automatically displays the detected beam position and its charge on a TV screen after each passage of the beam. The system is stable and is used to monitor the drift of the beam position. (author)

  3. Image quality improvement in megavoltage cone beam CT using an imaging beam line and a sintered pixelated array system

    International Nuclear Information System (INIS)

    Purpose: To quantify the improvement in megavoltage cone beam computed tomography (MVCBCT) image quality enabled by the combination of a 4.2 MV imaging beam line (IBL) with a carbon electron target and a detector system equipped with a novel sintered pixelated array (SPA) of translucent Gd2O2S ceramic scintillator. Clinical MVCBCT images are traditionally acquired with the same 6 MV treatment beam line (TBL) that is used for cancer treatment, a standard amorphous Si (a-Si) flat panel imager, and the Kodak Lanex Fast-B (LFB) scintillator. The IBL produces a greater fluence of keV-range photons than the TBL, to which the detector response is more optimal, and the SPA is a more efficient scintillator than the LFB. Methods: A prototype IBL + SPA system was installed on a Siemens Oncor linear accelerator equipped with the MVisionTM image guided radiation therapy (IGRT) system. A SPA strip consisting of four neighboring tiles and measuring 40 cm by 10.96 cm in the crossplane and inplane directions, respectively, was installed in the flat panel imager. Head- and pelvis-sized phantom images were acquired at doses ranging from 3 to 60 cGy with three MVCBCT configurations: TBL + LFB, IBL + LFB, and IBL + SPA. Phantom image quality at each dose was quantified using the contrast-to-noise ratio (CNR) and modulation transfer function (MTF) metrics. Head and neck, thoracic, and pelvic (prostate) cancer patients were imaged with the three imaging system configurations at multiple doses ranging from 3 to 15 cGy. The systems were assessed qualitatively from the patient image data. Results: For head and neck and pelvis-sized phantom images, imaging doses of 3 cGy or greater, and relative electron densities of 1.09 and 1.48, the CNR average improvement factors for imaging system change of TBL + LFB to IBL + LFB, IBL + LFB to IBL + SPA, and TBL + LFB to IBL + SPA were 1.63 (p -8), 1.64 (p -13), 2.66 (p -9), respectively. For all imaging doses, soft tissue contrast was more easily

  4. Production of chemically reactive radioactive ion beams through on-line separation

    International Nuclear Information System (INIS)

    The ISOL (isotope separation on line) allows the production of secondary radioactive ion beams through spallation or fragmentation or fission reactions that take place in a thick target bombarded by a high intensity primary beam. The challenge is to increase the intensity and purity of the radioactive beam. The optimization of the system target/source requires the right choice of material for the target by taking into account the stability of the material, its reactivity and the ionization method used. The target is an essential part of the system because radioactive elements are generated in it and are released more or less quickly. Tests have been made in order to select the best fitted material for the release of S, Se, Te, Ge and Sn. Materials tested as target filling are: ZrO2, Nb, Ti, V,TiO2, CeOx, ThO2, C, ZrC4 and VC). Other molecules such as: COSe, COS, SeS, COTe, GeS, SiS, SnS have been studied to ease the extraction of recoil nuclei (Se, S, Te, Ge and Sn) produced inside the target

  5. High-speed screen beam-profile-monitor system for high-energy beam-transport line at the HIMAC

    International Nuclear Information System (INIS)

    A screen monitor system was developed for beam profile monitors at the new High-Energy Beam-Transport (HEBT) section out the HIMAC. This monitor consists of the very thin fluorescent screen and the high-speed CCD camera. In addition to perform high-speed and high-resolution, this monitor does not almost destroy the beam. (author)

  6. Conceptual Design of Neutral Beam Injection System for EAST

    Science.gov (United States)

    Hu, Chundong; NBI Team

    2012-06-01

    Neutral beam injection (NBI) system with two neutral beam injections will be constructed on the Experimental Advanced Superconducting Tokamak (EAST) in two stages for high power auxiliary plasmas heating and non-inductive current drive. Each NBI can deliver 2~4 MW beam power with 50~80 keV beam energy in 10~100 s pulse length. Each elements of the NBI system are presented in this contribution.

  7. Polarization of x-ray Li- and Be-like Fe satellite lines excited by an electron beam

    International Nuclear Information System (INIS)

    We have calculated the polarization properties of dielectronic satellite lines in Li- and Be-like Fe ions excited through resonance electron capture by a monoenergetic electron beam. Following the density matrix formalism, we have computed the degree of polarization and the spectral intensity distribution of dielectronic satellites associated with a given polarization state. Theoretical results were compared with experiments performed at the Livermore Electron Beam Ion Trap where satellite line emission from Fe ions was simultaneously recorded with two crystal spectrometers. These results are relevant to diagnostic applications of x-ray line polarization spectroscopy in plasmas. copyright 1997 American Institute of Physics

  8. Conceptual design of a compact absolute valve for the ITER neutral beam injectors

    Energy Technology Data Exchange (ETDEWEB)

    Jones, Chris [Euratom/UKAEA Fusion Association, Culham Science Centre, Abingdon, OX14 3DB (United Kingdom)], E-mail: chris.m.jones@jet.uk; Waldon, Chris; Martin, David; Watson, Mike [Euratom/UKAEA Fusion Association, Culham Science Centre, Abingdon, OX14 3DB (United Kingdom); Sonderegger, Kurt; Lenherr, Bruno [VAT Vakuumventile AG, CH-9469 Haag (Switzerland); Andrews, Ian; Mansbridge, Simon [VAT Vacuum Products Ltd., Edmund House, Rugby Road, Leamington Spa, Warwickshire CV32 6EL (United Kingdom)

    2009-06-15

    The reference design for the ITER neutral beam injectors incorporated a fast shutter to limit tritium migration to the injector vacuum enclosures. In 2005, a need for an 'absolute' isolation valve was identified to facilitate injector maintenance procedures and protect the system from an in-vessel ingress of coolant event (ICE). An outline concept for an all-metal seal valve was developed during 2006, in close cooperation with the Swiss valve manufacturer VAT. During the following year, it became apparent that the length of beamline available for the valve was significantly less than originally envisaged, resulting in a radical revision of the design concept. A casing length of 760 mm has been achieved by means of major changes to the casing structure, plate dimensions, pendulum mechanism and seal actuators. A concept for a seal protection system has been developed to prevent beam line contamination reaching the valve components and to protect the valve plate from surface heating by plasma radiation. The new design concept has been extensively validated by analysis, including a whole-system FE model of the valve.

  9. Control of the heavy-ion beam line gas pressure and density in the HYLIFE thick-liquid chamber

    International Nuclear Information System (INIS)

    Controlling the density and pressure of the background gas in the beam lines of thick-liquid heavy-ion fusion chambers is of paramount importance for the beams to focus and propagate properly. Additionally, transport and deposition of debris material onto metal beam-tube surfaces may reduce the breakdown voltage and permit arcing with the beam. The strategy to control the gas pressure and the rate of debris deposition is twofold. First, the cool thick-liquid jet structures will mitigate the venting to the beam tubes. The ablation and venting of debris through thick-liquid structures must be modelled to predict the quantities of debris reaching the beam ports. TSUNAMI calculations have been performed to estimate the mass and energy flux histories at the entrance of the beam ports in a 9x9 HYLIFE pocket geometry. Secondly, additional renewable shielding will be interposed in the beam tubes themselves. Thick-liquid vortexes are planned to coat the inside of the beam tubes and provide a quasi-continuous protection of the beam-tube walls up to the final focus magnets. A three-component molten salt, flinabe, with a low melting temperature and vapor pressure, has been identified as a candidate liquid for the vortexes. The use of flinabe may actually eliminate the necessity of mechanical shutters to rapidly close the beam tubes after target ignition

  10. Lattice design for head-on beam-beam compensation at RHIC

    Energy Technology Data Exchange (ETDEWEB)

    Montag, C.

    2011-03-28

    Electron lenses for head-on beam-beam compensation will be installed in IP 10 at RHIC. Compensation of the beam-beam effect experienced at IP 8 requires betatron phase advances of {Delta}{psi} = k {center_dot} {pi} between the proton-proton interaction point at IP 8, and the electron lens at IP 10. This paper describes the lattice solutions for both the BLUE and the YELLOW ring to achieve this goal.

  11. Controlling beam halo-chaos via backstepping design

    Institute of Scientific and Technical Information of China (English)

    Gao Yuan; Kong Feng

    2008-01-01

    A backstepping control method is proposed for controlling beam halo-chaos in the periodic focusing channels PFCs) of high-current ion accelerator. The analysis and numerical results show that the method, via adjusting an exterior magnetic field, is effective to control beam halo chaos with five types of initial distribution ion beams, all statistical quantities of the beam halo-chaos are largely reduced, and the uniformity of ion beam is improved. This control method has an important value of application, for the exterior magnetic field can be easily adjusted in the periodical magnetic focusing channels in experiment.

  12. Shear response and design of RC beams strengthened using CFRP laminates

    Science.gov (United States)

    Singh, Shamsher B.

    2013-12-01

    The present investigation addresses the shear strengthening of deficient reinforced concrete (RC) beams using carbon fiber-reinforced polymer (CFRP) sheets. The effect of the pattern and orientation of the strengthening fabric on the shear capacity of the strengthened beams were examined. Three beams with various lay-ups of strengthening fabric, 45°, 0°/90°, and 0°/90°/45° were examined, in addition to an unstrengthened control beam. Principal and shear strains were measured at different locations at the critical sections of the strengthened beams corresponding to each applied shear force. Experimental results showing the advantage of beam strengthened using the various lay-ups of CFRP sheets are discussed. It is concluded that Beam-45°, Beam-0°/90°, and Beam-0°/90°/45° show about 25%, 19%, and 40% increases in shear-load carrying capacity in comparison to the control beam, respectively. Also, there exists a critical value of shear force up to which there is no appreciable shear strain in the CFRP sheets/beam. This shear force marks the ultimate shear resistance of the control beam. However, the strengthened beams exhibited significant strength and stiffness even beyond the critical value of the shear force. A design example for shear strengthening shows that the design equations available in the literature underestimate the actual shear strength of the beams.

  13. CEBAF [Continuous Electron Beam Accelerator Facility] design overview and project status

    International Nuclear Information System (INIS)

    This paper discusses the design and specifications of the Continuous Electron Beam Accelerator Facility. Beam performance objectives are discussed, as well as the recirculating linac concept, the injector, cavities, cryogenic system, beam transport and optics, rf system and construction progress. 19 refs., 10 figs

  14. Design of Extended Depth-of-Focus Laser Beams Using Orthogonal Beam Expansions

    Directory of Open Access Journals (Sweden)

    Leonard Bergstein

    2005-06-01

    Full Text Available Laser beams with extended depth of focus have many practical applications, such as scanning printed bar codes. Previous work has concentrated on synthesizing such beams by approximating the nondiffracting Bessel beam solution to the wave equation. In this paper, we introduce an alternate novel synthesis method that is based on maintaining a minimum MTF value (contrast over the largest possible distance. To achieve this, the coefficients of an orthogonal beam expansion are sequentially optimized to this criterion. One of the main advantages of this method is that it can be easily generalized to noncircularly symmetrical beams by the appropriate choice of the beam expansion basis functions. This approach is found to be very useful for applications that involve scanning of the laser beam.

  15. LHC Collimators with Embedded Beam Position Monitors: a New Adbanced Mechanical Design

    CERN Document Server

    Dallocchio, A; Boccard, C; Carra, F; Gasior, M; Gentini, L; Timmins, M

    2011-01-01

    The LHC collimation system, ensuring both functions of beam cleaning and machine protection, is potentially submitted to high-energy beam impacts. Currently the collimators setup is performed by monitoring beam losses generated by the collimator jaws when approaching the particle beam. This procedure is applied to all LHC collimators (almost one hundred), taking several hours, and needs to be repeated if beam settings change significantly. Furthermore, during the beam-based alignment, the LHC tertiary collimators are potentially exposed to abnormal losses entailing possible damage to their tungsten jaws. To improve the efficiency of the machine operation and better control the particle beam a new advanced design embedding Beam Position Monitors (BPM) into the movable collimator jaws has been developed. This paper describes the mechanical design of various types of future collimators with embedded BPMs. Experimental measurements performed on a simplified functional prototype installed in the CERN SPS showed th...

  16. Unveiling the parent population of beamed narrow-line Seyfert 1s

    CERN Document Server

    Berton, M; Ciroi, S; Caccianiga, A; Peterson, B M; Mathur, S; Lister, M L; Richards, J L; Congiu, E; Cracco, V; Di Mille, F; Frezzato, M; La Mura, G; Rafanelli, P

    2016-01-01

    Narrow-line Seyfert 1 galaxies (NLS1s) are active galactic nuclei (AGN) recently identified as a new class of $\\gamma$-ray sources. The high energy emission is explained by the presence of a relativistic jet observed at small angles, just like in the case of blazars. When the latter are observed at larger angles they appear as radio-galaxies, but an analogue parent population for beamed NLS1s has not yet been determined. In this work we analyze this problem by studying the physical properties of three different samples of parent sources candidates: steep-spectrum radio-loud NLS1s, radio-quiet NLS1s, and disk-hosted radio-galaxies, along with compact steep-spectrum sources. In our approach, we first derived black hole mass and Eddington ratio from the optical spectra, then we investigated the interaction between the jet and the narrow-line region from the [O III] $\\lambda\\lambda$4959,5007 lines. Finally, the radio luminosity function allowed us to compare their jet luminosity and hence determine the relations ...

  17. 77 FR 38124 - Inspector General; Line of Succession Designation, No. 23-C, Revision 5

    Science.gov (United States)

    2012-06-26

    ... ADMINISTRATION Inspector General; Line of Succession Designation, No. 23-C, Revision 5 This document replaces and supersedes ``Delegation of Authority and Line of Succession No. 23-C, Revision 4.'' Line of Succession Designation, No. 23-C, Revision 5: Effective immediately, the Inspector General's Line of...

  18. Design of an 18 MW Beam Dump for 500 GeV Electron/Positron Beams at an ILC

    CERN Document Server

    Amann, John; Seryi, Andrei; Walz, Dieter; Kulkarni, Kiran; Rai, Pravin; Satyamurthy, Polepalle; Tiwari, Vikar; Vincke, Heinz

    2010-01-01

    This article presents a report on the progress made in designing 18 MW water based Beam Dumps for electrons or positrons for an International Linear Collider (ILC). Multi-dimensional technology issues have to be addressed for the successful design of the Beam Dump. They include calculations of power deposition by the high energy electron/positron beam bunch trains, computational fluid dynamic analysis of turbulent water flow, mechanical design, process flow analysis, hydrogen/oxygen recombiners, handling of radioactive 7Be and 3H, design of auxiliary equipment, provisions for accident scenarios, remote window exchanger, radiation shielding, etc. The progress made to date is summarized, the current status, and also the issues still to be addressed

  19. Design of planar pick-ups for beam position monitor in the bunch compressor at FLASH and XFEL

    Energy Technology Data Exchange (ETDEWEB)

    Angelovski, Aleksandar; Penirschke, Andreas; Jakoby, Rolf [Institut fuer Mikrowellentechnik und Photonik, TU Darmstadt (Germany); Sydlo, Cezary; Mavric, Uros; Gerth, Christopher [DESY, Hamburg (Germany)

    2013-07-01

    For obtaining ultra short electron bunches at the Free Electron Laser at DESY (FLASH) the beam is compressed in magnetic chicanes. During the compression process the precise knowledge of the energy of the bunches is essential for the longitudinal dynamics control. The measurement of the beam position in the chicane allows for non-destructive measurements of the energy. For that purpose, two stripline pick-ups perpendicular to the beam direction are installed in the chicane at FLASH as a part of the Beam Position Monitor. The recent upgrade in the electronics as well as the increased aperture and length of the beam pipe (for the European XFEL) requires the design of new pick-ups which will fulfill the new demands. Namely, the pick-ups should have maximum signal at 3 GHz with minimum reflections. In this talk, we will present the design of planar transmission line pick-ups for FLASH and XFEL. The planar design of the pick-ups can provide for a proper impedance matching to the subsequent electronics as well as sufficient mechanical stability along the aperture when using alumina substrate. A prototype of the pick-ups was build and installed in a non-hermetic body. The measured S parameters are compared to the simulation.

  20. Design and development of a radio frequency quadrupole linac postaccelerator for the Variable Energy Cyclotron Center rare ion beam project

    International Nuclear Information System (INIS)

    A four-rod type heavy-ion radio frequency quadrupole (RFQ) linac has been designed, constructed, and tested for the rare ion beam (RIB) facility project at VECC. Designed for cw operation, this RFQ is the first postaccelerator in the RIB beam line. It will accelerate A/q≤14 heavy ions coming from the ion source to the energy of around 100 keV/u for subsequent acceleration in a number of Interdigital H-Linac. Operating at a resonance frequency of 37.83 MHz, maximum intervane voltage of around 54 kV will be needed to achieve the final energy over a vane length of 3.12 m for a power loss of 35 kW. In the first beam tests, transmission efficiency of about 90% was measured at the QQ focus after the RFQ for O5+ beam. In this article the design of the RFQ including the effect of vane modulation on the rf characteristics and results of beam tests will be presented.

  1. Comparison of depth-dose distributions between reactor and accelerator neutron beams proposed by design studies

    International Nuclear Information System (INIS)

    Accelerator epithermal neutron beams produced by 7Li(p,n)7Be reactions were compared with reactor neutron beams using a fission converter (20% enriched 235U 5mm-thick plate) from view points of neutron spectrum and depth-dose distributions in a phantom. It is possible to design accelerator epithermal neutron beams having better depth-dose distributions than reactor neutron beams. (author)

  2. Practical biological spread-out Bragg peak design of carbon beam

    OpenAIRE

    Kim, Chang Hyeuk; Lee, Hwa-Ryun; Chang, Seduk; Jang, Hong Suk; Kim, Jeong Hwan; Park, Dong Wook; Hwang, Won Taek; Yang, Tea-Keun

    2015-01-01

    The carbon beams show more advantages on the biological properties compared with proton beams in radiation therapy. The carbon beam shows high linear energy transfer (LET) to medium and it increases the relative biological effectiveness (RBE). To design spread-out Bragg peak (SOBP) of biological dose using carbon beam, a practical method was purposed by using the linear-quadratic (LQ) model and Geant4 based Monte Carlo simulation code. The various Bragg peak profiles and LET was calculated fo...

  3. Parametric Study of the current limit within a single driver-scale transport beam line of an induction Linac for Heavy Ion Fusion

    International Nuclear Information System (INIS)

    The High Current Experiment (HCX) at Lawrence Berkeley National Laboratory is part of the US program that explores heavy-ion beam as the driver option for fusion energy production in an Inertial Fusion Energy (IFE) plant. The HCX is a beam transport experiment at a scale representative of the low-energy end of an induction linear accelerator driver. The primary mission of this experiment is to investigate aperture fill factors acceptable for the transport of space-charge-dominated heavy-ion beams at high intensity (line charge density ∼0.2 (micro)C/m) over long pulse durations (4 (micro)s) in alternating gradient focusing lattices of electrostatic or magnetic quadrupoles. This experiment is testing transport issues resulting from nonlinear space-charge effects and collective modes, beam centroid alignment and steering, envelope matching, image charges and focusing field nonlinearities, halo and, electron and gas cloud effects. We present the results for a coasting 1 MeV K+ ion beam transported through ten electrostatic quadrupoles. The measurements cover two different fill factor studies (60% and 80% of the clear aperture radius) for which the transverse phase-space of the beam was characterized in detail, along with beam energy measurements and the first halo measurements. Electrostatic quadrupole transport at high beam fill factor (∼80%) is achieved with acceptable emittance growth and beam loss. We achieved good envelope control, and re-matching may only be needed every ten lattice periods (at 80% fill factor) in a longer lattice of similar design. We also show that understanding and controlling the time dependence of the envelope parameters is critical to achieving high fill factors, notably because of the injector and matching section dynamics

  4. Parametic Study of the current limit within a single driver-scaletransport beam line of an induction Linac for Heavy Ion Fusion

    Energy Technology Data Exchange (ETDEWEB)

    Prost, Lionel Robert

    2007-02-14

    The High Current Experiment (HCX) at Lawrence Berkeley National Laboratory is part of the US program that explores heavy-ion beam as the driver option for fusion energy production in an Inertial Fusion Energy (IFE) plant. The HCX is a beam transport experiment at a scale representative of the low-energy end of an induction linear accelerator driver. The primary mission of this experiment is to investigate aperture fill factors acceptable for the transport of space-charge-dominated heavy-ion beams at high intensity (line charge density {approx}0.2 {micro}C/m) over long pulse durations (4 {micro}s) in alternating gradient focusing lattices of electrostatic or magnetic quadrupoles. This experiment is testing transport issues resulting from nonlinear space-charge effects and collective modes, beam centroid alignment and steering, envelope matching, image charges and focusing field nonlinearities, halo and, electron and gas cloud effects. We present the results for a coasting 1 MeV K{sup +} ion beam transported through ten electrostatic quadrupoles. The measurements cover two different fill factor studies (60% and 80% of the clear aperture radius) for which the transverse phase-space of the beam was characterized in detail, along with beam energy measurements and the first halo measurements. Electrostatic quadrupole transport at high beam fill factor ({approx}80%) is achieved with acceptable emittance growth and beam loss. We achieved good envelope control, and re-matching may only be needed every ten lattice periods (at 80% fill factor) in a longer lattice of similar design. We also show that understanding and controlling the time dependence of the envelope parameters is critical to achieving high fill factors, notably because of the injector and matching section dynamics.

  5. Design of block copolymer membranes using segregation strength trend lines

    KAUST Repository

    Sutisna, Burhannudin

    2016-05-18

    Block copolymer self-assembly and non-solvent induced phase separation are now being combined to fabricate membranes with narrow pore size distribution and high porosity. The method has the potential to be used with a broad range of tailor-made block copolymers to control functionality and selectivity for specific separations. However, the extension of this process to any new copolymer is challenging and time consuming, due to the complex interplay of influencing parameters, such as solvent composition, polymer molecular weights, casting solution concentration, and evaporation time. We propose here an effective method for designing new block copolymer membranes. The method consists of predetermining a trend line for the preparation of isoporous membranes, obtained by computing solvent properties, interactions and copolymer block sizes for a set of successful systems and using it as a guide to select the preparation conditions for new membranes. We applied the method to membranes based on poly(styrene-b-ethylene oxide) diblocks and extended it to newly synthesized poly(styrene-b-2-vinyl pyridine-b-ethylene oxide) (PS-b-P2VP-b-PEO) terpolymers. The trend line method can be generally applied to other new systems and is expected to dramatically shorten the path of isoporous membrane manufacture. The PS-b-P2VP-b-PEO membrane formation was investigated by in situ Grazing Incident Small Angle X-ray Scattering (GISAXS), which revealed a hexagonal micelle order with domain spacing clearly correlated to the membrane interpore distances.

  6. Design and development of neutral beam module components

    International Nuclear Information System (INIS)

    The Mirror Fusion Test Facility (MFTF) injection system consists of twenty 20 keV start-up, and twenty-four 80 keV sustaining neutral beam source modules. The neutral beam modules are mounted in four clusters equally spaced around the waist of the vacuum vessel which contains the superconducting magnets. A module is defined here as an assembly consisting of a beam source and the interfacing components between that beam source and the vacuum chamber. Six major interfacing components are the subject of this paper. They are the magnetic shield, the neutralizer duct, the isolation valve, mounting gimbals, aiming bellows and actuators

  7. THE AGS-BASED SUPER NEUTRINO BEAM FACILITY CONCEPTUAL DESIGN REPORT

    Energy Technology Data Exchange (ETDEWEB)

    WENG,W.T.; DIWAN,M.; RAPARIA,D.

    2004-10-08

    be upgraded to 0.2 s to reach the required repetition rate of 2.5 Hz. The required upgrade of the AGS power supply, the rf system, and other rate dependent accelerator issues is discussed. The design of the target/horn configuration is shown. The material selected for the proton target is a Carbon-Carbon composite. It is a 3-dimensional woven material that exhibits extremely low thermal expansion for temperatures up to 1000 C; for higher temperatures it responds like graphite. This property is important for greatly reducing the thermo-elastic stresses induced by the beam, thereby extending the life of the target. The target consists of a 80 cm long cylindrical rod of 12 mm diameter. The target intercepts a 2 mm rms proton beam of 10{sup 14} protons/pulse. The total energy deposited as heat in the target is 7.3 kJ with peak temperature rise of about 280 C. Heat will be removed from the target through forced convection of helium gas across its outside surface. The extracted proton beam uses an existing beamline at the AGS, but is then directed to a target station atop a constructed earthen hill. The target is followed by a downward slopping pion decay channel. This vertical arrangement keeps the target and decay pipe well above the water table in this area. The 11.3 degrees slope aims the neutrino beam at a water Cerenkov neutrino detector to be located in the Homestake mine at Lead, South Dakota. A 3-dimensional view of the beam transport line, target station, and decay tunnel is provided.

  8. RAPD and SSR Polymorphisms in Mutant Lines of Transgenic Wheat Mediated by Low Energy Ion Beam

    Science.gov (United States)

    Wang, Tiegu; Huang, Qunce; Feng, Weisen

    2007-10-01

    Two types of markers-random amplified polymorphic DNA (RAPD) and simple sequence repeat DNA (SSR)-have been used to characterize the genetic diversity among nine mutant lines of transgenic wheat intermediated by low energy ion beam and their four receptor cultivars. The objectives of this study were to analyze RAPD-based and SSR-based genetic variance among transgenic wheat lines and with their receptors, and to find specific genetic markers of special traits of transgenic wheat lines. 170 RAPD primers were amplified to 733 fragments in all the experimental materials. There were 121 polymorphic fragments out of the 733 fragments with a ratio of polymorphic fragments of 16.5%. 29 SSR primer pairs were amplified to 83 fragments in all the experiment materials. There were 57 polymorphic fragments out of the 83 fragments with a ratio of polymorphic fragments of 68.7%. The dendrograms were prepared based on a genetic distance matrix using the UPGMA (Unweighted Pair-group Method with Arithmetic averaging) algorithm, which corresponded well to the results of the wheat pedigree analysis and separated the 13 genotypes into four groups. Association analysis between RAPD and SSR markers with the special traits of transgenic wheat mutant lines discovered that three RAPD markers, s1, opt-16, and f14, were significantly associated with the muticate trait, while three SSR markers, Rht8 (Xgwm261), Rht-B1b, and Rht-D1b, highly associated with the dwarf trait. These markers will be useful for marker-assistant breeding and can be used as candidate markers for further gene mapping and cloning.

  9. RAPD and SSR Polymorphisms in Mutant Lines of Transgenic Wheat Mediated by Low Energy Ion Beam

    International Nuclear Information System (INIS)

    Two types of markers-random amplified polymorphic DNA (RAPD) and simple sequence repeat DNA (SSR)-have been used to characterize the genetic diversity among nine mutant lines of transgenic wheat intermediated by low energy ion beam and their four receptor cultivars. The objectives of this study were to analyze RAPD-based and SSR-based genetic variance among transgenic wheat lines and with their receptors, and to find specific genetic markers of special traits of transgenic wheat lines. 170 RAPD primers were amplified to 733 fragments in all the experimental materials. There were 121 polymorphic fragments out of the 733 fragments with a ratio of polymorphic fragments of 16.5%. 29 SSR primer pairs were amplified to 83 fragments in all the experiment materials. There were 57 polymorphic fragments out of the 83 fragments with a ratio of polymorphic fragments of 68.7%. The dendrograms were prepared based on a genetic distance matrix using the UPGMA (Unweighted Pair-group Method with Arithmetic averaging) algorithm, which corresponded well to the results of the wheat pedigree analysis and separated the 13 genotypes into four groups. Association analysis between RAPD and SSR markers with the special traits of transgenic wheat mutant lines discovered that three RAPD markers, s1, opt-16, and f14, were significantly associated with the muticate trait, while three SSR markers, Rht8 (Xgwm261), Rht-B1b, and Rht-D1b, highly associated with the dwarf trait. These markers will be useful for marker-assistant breeding and can be used as candidate markers for further gene mapping and cloning

  10. High flux and high resolution VUV beam line for synchrotron radiation

    International Nuclear Information System (INIS)

    A beam line has been optimized for high flux and high resolution in the wavelength range from 30 nm to 300 nm. Sample chambers for luminescence spectroscopy on gaseous, liquid and solid samples and for photoelectron spectroscopy have been integrated. The synchrotron radiation from the storage ring DORIS (at DESY, Hamburg) emitted into 50 mrad in horizontal and into 2.2 mrad in vertical direction is focused by a cylindrical and a plane elliptical mirror into the entrance slit of a 2m normal incidence monochromator. The light flux from the exit slit is focused by a rotational elliptic mirror onto the sample yielding a size of the light spot of 4 x 0.15 mm2. The light flux at the sample reaches 7 x 1012 photons nm-1s-1 at 8 eV photon energy for a current of 100 mA in DORIS. A resolution of 0.007 nm has been obtained. (orig.)

  11. Ozone measurement in EXAFS beam line BL-08 of INDUS-2

    International Nuclear Information System (INIS)

    Ozone measurement in experimental hutch of Extended X-ray Absorption Fine Structure (EXAFS) beam line (BL-08) of INDUS-2 is carried out with the objectives of measuring ozone build-up profile at various locations inside the hutch, to check the effectiveness of the existing exhaust blower used to remove the ozone from the hutch and to determine the ozone decay time to reach the safe limit of 0.1 ppm. The results show that the ozone level is less than 0.1 ppm in all measured locations. This paper describes the methodology, experimental set-up and the results of the experiment done in June 2010 at RRCAT. (author)

  12. Detector Response and Beam Line Transmission Measurements with Far-Infrared Radiation

    CERN Document Server

    Grimm, O; Fröhlich, L

    2005-01-01

    Various activities at the TTF linear accelerator at DESY, Hamburg, that drives the VUV-FEL are geared towards measuring the longitudinal charge distribution of electron bunches with coherent far-infrared radiation. Examples are beam lines transporting synchrotron or transition radiation to interferometers mounted inside or outside the tunnel, and studies of single-shot grating spectrometers. All such approaches require a good understanding of the radiation generation and transport mechanism and of the detector characteristics to extract useful information on the charge distribution. Simulations and measurements of the expected transverse intensity distribution and polarization of synchrotron radiation emitted at the first bunch compressor of TTF have been performed. The transverse intensity scanning provided for the first time at DESY a visual image of the footprint of terahertz radiation. Detector response measurements have been performed at the FELIX facility, Netherlands, for wavelengths between 100-160 mi...

  13. On line Release Simulator of Radioactive Beams produced by ISOL technique

    International Nuclear Information System (INIS)

    Target and ion source constitute the heart for the production of radioactive ion beams, RIBs. The goal of this work is to help in the development of reliable and efficient target and ion source systems for production of short-lived isotopes of a wide range of elements by the ISOL method. With this aim an oracle database of diffusion and desorption parameters with more than 10.000 entries has been built. The database is accessible on line and a web application has been developed allowing the retrieval of information from the database in order to assist in the configuration of the input parameters for a Monte Carlo code, RIBO, for the simulation of target-ion source systems

  14. Design Specifications for a Radiation Tolerant Beam Loss Measurement ASIC

    CERN Document Server

    Venturini, G G; Effinger, E; Zamantzas, C

    2009-01-01

    A novel radiation-hardened current digitizer ASIC is in planning stage, aimed at the acquisition of the current signals from the ionization chambers employed in the Beam Loss Monitoring system at CERN. The purpose is to match and exceed the performance of the existing discrete component design, currently in operation in the Large Hadron Collider (LHC). The specifications include: a dynamic range of nine decades, defaulting to the 1 pA-1mA range but adjustable by the user, ability to withstand a total integrated dose of 10 kGy at least in 20 years of operation and user selectable integrating windows, as low as 500 ns. Moreover, the integrated circuit should be able to digitize currents of both polarity with a minimum number of external components and without needing any configuration. The target technology is the IBM 130nm CMOS process. The specifications, the architecture choices and the reasons on which they are based upon are discussed in this paper.

  15. Artificial intelligence research in particle accelerator control systems for beam line tuning

    Energy Technology Data Exchange (ETDEWEB)

    Pieck, Martin [Los Alamos National Laboratory

    2008-01-01

    Tuning particle accelerators is time consuming and expensive, with a number of inherently non-linear interactions between system components. Conventional control methods have not been successful in this domain and the result is constant and expensive monitoring of the systems by human operators. This is particularly true for the start-up and conditioning phase after a maintenance period or an unexpected fault. In turn, this often requires a step-by-step restart of the accelerator. Surprisingly few attempts have been made to apply intelligent accelerator control techniques to help with beam tuning, fault detection, and fault recovery problems. The reason for that might be that accelerator facilities are rare and difficult to understand systems that require detailed expert knowledge about the underlying physics as well as months if not years of experience to understand the relationship between individual components, particularly if they are geographically disjoint. This paper will give an overview about the research effort in the accelerator community that has been dedicated to the use of artificial intelligence methods for accelerator beam line tuning.

  16. High power microwave beam steering based on gyromagnetic nonlinear transmission lines

    Energy Technology Data Exchange (ETDEWEB)

    Romanchenko, I. V., E-mail: riv@lfe.hcei.tsc.ru; Rostov, V. V.; Gunin, A. V.; Konev, V. Yu. [Institute of high current electronics SB RAS, Akademichesky 2/3, 634055, Tomsk (Russian Federation)

    2015-06-07

    We demonstrate electronically controlled beam steering by high power RF pulses produced by two gyromagnetic nonlinear transmission lines (NLTLs) connected to a one high voltage driver. Each NLTL is capable of producing several ns RF pulses with peak power from 50 to 700 MW (6% standard deviation) at frequencies from 0.5 to 1.7 GHz (1% standard deviation) with 100 Hz repetition rate. Using a helix antenna allows irradiating of RF pulses with almost circular polarization and 350 MW maximum peak power, which corresponds to 350 kV effective potential of radiation. At the installation of two identical channels, we demonstrate the possibility of beam steering within ±15° in the horizontal plane by coherent RF pulses with circular polarization at 1.0 GHz center frequency. Fourfold increase in the power flux density for in-phase irradiation of RF pulses is confirmed by comparison with one-channel operation.

  17. High power microwave beam steering based on gyromagnetic nonlinear transmission lines

    International Nuclear Information System (INIS)

    We demonstrate electronically controlled beam steering by high power RF pulses produced by two gyromagnetic nonlinear transmission lines (NLTLs) connected to a one high voltage driver. Each NLTL is capable of producing several ns RF pulses with peak power from 50 to 700 MW (6% standard deviation) at frequencies from 0.5 to 1.7 GHz (1% standard deviation) with 100 Hz repetition rate. Using a helix antenna allows irradiating of RF pulses with almost circular polarization and 350 MW maximum peak power, which corresponds to 350 kV effective potential of radiation. At the installation of two identical channels, we demonstrate the possibility of beam steering within ±15° in the horizontal plane by coherent RF pulses with circular polarization at 1.0 GHz center frequency. Fourfold increase in the power flux density for in-phase irradiation of RF pulses is confirmed by comparison with one-channel operation

  18. Lithography alternatives meet design style reality: How do they "line" up?

    Science.gov (United States)

    Smayling, Michael C.

    2016-03-01

    Optical lithography resolution scaling has stalled, giving innovative alternatives a window of opportunity. One important factor that impacts these lithographic approaches is the transition in design style from 2D to 1D for advanced CMOS logic. Just as the transition from 3D circuits to 2D fabrication 50 years ago created an opportunity for a new breed of electronics companies, the transition today presents exciting and challenging time for lithographers. Today, we are looking at a range of non-optical lithography processes. Those considered here can be broadly categorized: self-aligned lithography, self-assembled lithography, deposition lithography, nano-imprint lithography, pixelated e-beam lithography, shot-based e-beam lithography .Do any of these alternatives benefit from or take advantage of 1D layout? Yes, for example SAPD + CL (Self Aligned Pitch Division combined with Complementary Lithography). This is a widely adopted process for CMOS nodes at 22nm and below. Can there be additional design / process co-optimization? In spite of the simple-looking nature of 1D layout, the placement of "cut" in the lines and "holes" for interlayer connections can be tuned for a given process capability. Examples of such optimization have been presented at this conference, typically showing a reduction of at least one in the number of cut or hole patterns needed.[1,2] Can any of the alternatives complement each other or optical lithography? Yes.[3] For example, DSA (Directed Self Assembly) combines optical lithography with self-assembly. CEBL (Complementary e-Beam Lithography) combines optical lithography with SAPD for lines with shot-based e-beam lithography for cuts and holes. Does one (shrinking) size fit all? No, that's why we have many alternatives. For example NIL (Nano-imprint Lithography) has been introduced for NAND Flash patterning where the (trending lower) defectivity is acceptable for the product. Deposition lithography has been introduced in 3D NAND Flash to

  19. Design, analysis and RF characterisation of copper lining for accelerators

    International Nuclear Information System (INIS)

    BARC is involved in the development of a 352.21 MHz Drift Tube Linac (DTL) for Low Energy High Intensity Proton Accelerator (LEHIPA). The copper lining forming the inner surface of DTL cavities must be extremely smooth and should be made out of high purity copper with good electrical conductivity, as the cavities are operated under high vacuum and high power RF in continuous wave (CW) mode. Uniformity of the copper deposition is one of the key requirements for these cavities so as to minimize the post plating machining processes. Qualitative tests of the plating were performed on pill box cavities whose fundamental mode (TM010) frequencies are higher than the operating frequency of the DTL cavity and a quality factor of 85% of the theoretical limit has been achieved. Electrostatic current flow simulations were done to optimize the anode array configuration for the electroplating setup. The key performance parameters were the uniformity and magnitude of the cathode current density and it was optimized under the constraints of maximum permissible cathode current densities, anode polarization density and the substrate material properties. An experimental anode arrangement was designed and developed for the electrodeposition of copper on scaled prototype of DTL cavity. The plating was carried out using a pulse periodical reversal power supply with 500 ms forward and 100 ms reverse cycle. This paper discusses the various design and development challenges associated with the plating process on high power CW mode radio-frequency cavities. (author)

  20. BEAM-LOSS DRIVEN DESIGN OPTIMIZATION FOR THE SPALLATION NEUTRON SOURCE (SNS) RING.

    Energy Technology Data Exchange (ETDEWEB)

    WEI,J.; BEEBE-WANG,J.; BLASKIEWICZ,M.; CAMERON,P.; DANBY,G.; GARDNER,C.J.; JACKSON,J.; LEE,Y.Y.; LUDEWIG,H.; MALITSKY,N.; RAPARIA,D.; TSOUPAS,N.; WENG,W.T.; ZHANG,S.Y.

    1999-03-29

    This paper summarizes three-stage design optimization for the Spallation Neutron Source (SNS) ring: linear machine design (lattice, aperture, injection, magnet field errors and misalignment), beam core manipulation (painting, space charge, instabilities, RF requirements), and beam halo consideration (collimation, envelope variation, e-p issues etc.).