WorldWideScience

Sample records for superconducting supercollider ssc

  1. SUPERCOLLIDER: SDC for SSC

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1992-03-15

    On a scale to match the 87-kilometre Superconducting Supercollider (SSC) planned for Ellis County, Texas, the Solenoidal Detector Collaboration (SDC) is designing a large general purpose detector to pursue a broad range of physics goals.

  2. SUPERCOLLIDER: SDC for SSC

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    On a scale to match the 87-kilometre Superconducting Supercollider (SSC) planned for Ellis County, Texas, the Solenoidal Detector Collaboration (SDC) is designing a large general purpose detector to pursue a broad range of physics goals

  3. Silicon calorimetry for the SSC[ Superconducting Supercollider

    International Nuclear Information System (INIS)

    Bertrand, C.; Borchi, E.; Brau, J.E.

    1989-01-01

    SSC experiments will rely heavily on their calorimeters. Silicon calorimetry, which has been introduced in recent years as a useful technology, has many attractive characteristics which may make it a viable option for consideration. The many attractive properties of silicon detectors are reviewed. The relevant present day applications of large areas of silicon detectors are summarize to illustrate the emerging use. The troublesome issue of radiation damage in a high luminosity environment like the SSC is considered with a summary of much of the recent new measurements which help clarify this situation. A discussion of the electronics and a possible mechanical configuration is presented, followed by a summary of the outstanding R and D issues. 31 refs., 11 figs., 3 tabs

  4. Physics at the superconducting supercollider

    International Nuclear Information System (INIS)

    Gaillard, M.K.

    1988-01-01

    Summary of lectures presented in the Shell Seminar Series at the national convention of the National Science Teachers Association, April 7-10, 1988. Topics covered are: The Standard model, symmetry breaking, the superconducting supercollider, physics at the TEV scale, and the early universe

  5. SUPERCOLLIDER: Update

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    After the oscillations in the financial fortunes of the US Superconducting Supercollider (SSC) this summer, a compromise bill was passed in September that included $517 million for the SSC in the new financial year, which began on October 1

  6. SUPERCOLLIDER: Update

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1992-12-15

    After the oscillations in the financial fortunes of the US Superconducting Supercollider (SSC) this summer, a compromise bill was passed in September that included $517 million for the SSC in the new financial year, which began on October 1.

  7. The Superconducting Supercollider and US Science Policy

    Science.gov (United States)

    Marburger, John H.

    2014-06-01

    Reasons for the Superconducting Supercollider's (SSC's) termination include significant changes in the attitude of the government towards large scientific projects originating with management reforms introduced decades earlier. In the 1980s, the government insisted on inclusion of elements of these reforms in the SSC's management contract, including increased demands for accountability, additional liability for contractors, and sanctions for infractions. The SSC's planners could not have opted out of the reforms, which were by then becoming part of all large publicly funded projects. Once these reforms were in place, management mistakes in the SSC's planning and construction became highly visible, leading to termination of the machine. This episode contains two key lessons about science policy. One is that the momentum of the government's management reforms was unstoppable, and its impact on large scientific facilities and projects could not be reversed. The other is that specific measures such as cost and schedule-tracking systems to provide measures of program performance and impact were also inevitable; large scientific projects needed new parameters of accountability and transparency in what can be called the Principle of Assurance.

  8. Determination of the linear aperture of the SSC [Superconducting Supercollider] clustered lattice used for the conceptual design report

    International Nuclear Information System (INIS)

    Dell, G.F.

    1986-01-01

    A study is made of the linear aperture for the clustered lattice used for the SSC Conceptual Design Report. Random multipole errors are included in all magnetic elements including the insertion dipoles and quadrupoles. Based on the concept of smear, the linear aperture is equal to the dynamic aperture in the range -0.1 ≤ ΔP/P ≤ 0.03%. Strong coupling for ΔP/P > 0% produces large smears. A variation of the smear parameter that is insensitive to coupling is proposed. A comparison is made with results reported in the SSC Conceptual Design Report

  9. SUPERCOLLIDER: Texas meeting

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    With preparations pushing forward for the Superconducting Supercollider (SSC) to be built in Ellis County, Texas, there was a full agenda at the third SSC fall conference, held in Corpus Christi, Texas, from 14-17 October

  10. Simulation of the coil winder for the superconducting supercollider

    International Nuclear Information System (INIS)

    Carnal, C.L.

    1994-01-01

    A unique apparatus has been designed to shape the magnet windings for the Superconducting Supercollider (SSC). The magnet windings of the SSC consist of conductor coils which are placed around a torus to generate a strong magnetic field within the torus. Several process variables must be controlled to demanding tolerances during the coil winding operation. The speed of conductor payout must be coordinated from a small spool through two stages of roll formers to the final coil shape on a large bobbin. The amount of plastic deformation in the conductor must be tightly controlled to pack it into the large bobbin with a certain desired force. The control problem consists of multiple interacting control loops. This paper describes a computer simulation of the coil winding apparatus. The Advanced Continuous Simulation Language (ACSL) was used to encode a mathematical model of the system. The objectives of the simulation study were to understand the dynamic behavior of the system and to explore strategies for control. Although the funding for the SSC was canceled, the results of the research and development project for construction of this unique facility will find application in other large-scale construction and manufacturing problems

  11. Supercollider at Snowmass

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1986-11-15

    While the proposed US Superconducting SupercolliderSSC, an 85 kilometre ring t o provide 20 000 GeV (20 TeV) proton beams – waits hopefully for the go-ahead, the US physics community is preparing for life at the supercollider. A Summer Study on SSC physics was held at Snowmass Village, Colorado, this summer. The principal goal was the critical evaluation of all aspects of the SSC, in the light of the recently submitted Conceptual Design Report, and of progress in accelerator technology, collider physics, and instrumentation.

  12. Supercollider at Snowmass

    International Nuclear Information System (INIS)

    Anon.

    1986-01-01

    While the proposed US Superconducting SupercolliderSSC, an 85 kilometre ring t o provide 20 000 GeV (20 TeV) proton beams – waits hopefully for the go-ahead, the US physics community is preparing for life at the supercollider. A Summer Study on SSC physics was held at Snowmass Village, Colorado, this summer. The principal goal was the critical evaluation of all aspects of the SSC, in the light of the recently submitted Conceptual Design Report, and of progress in accelerator technology, collider physics, and instrumentation

  13. Supercollider: Groundwork

    International Nuclear Information System (INIS)

    Anon.

    1990-01-01

    The Program Advisory Committee of the proposed US Superconducting Supercollider (SSC) met at Snowmass, Colorado, in July to consider 15 initial expressions of interest in SSC research. This resulted in a call for letters of intent for major detectors to look at high transverse momentum processes, and the committee will meet again from 13-15 December to consider the letters received. While promising ideas will benefit from support for the preparation of complete technical proposals during the next year, any group can still submit a later proposal

  14. Supercollider: Magnet update

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1990-07-15

    The heart of the proposed US Superconducting Supercollider (SSC) is the set of superconducting magnets to hold its beams in orbit. Approximately 8,000 dipoles and 2,000 quadrupoles are needed, as well as many other special magnets. In addition the 2 TeV high energy booster would also be a superconducting machine, using about 1,200 magnets. In all, some 12,000 superconducting magnets would need to be precision built at the lowest possible cost.

  15. Supercollider: Magnet update

    International Nuclear Information System (INIS)

    Anon.

    1990-01-01

    The heart of the proposed US Superconducting Supercollider (SSC) is the set of superconducting magnets to hold its beams in orbit. Approximately 8,000 dipoles and 2,000 quadrupoles are needed, as well as many other special magnets. In addition the 2 TeV high energy booster would also be a superconducting machine, using about 1,200 magnets. In all, some 12,000 superconducting magnets would need to be precision built at the lowest possible cost

  16. Review of the abort dump shown in the SSC [superconducting super collider] conceptual design report

    International Nuclear Information System (INIS)

    Cossairt, J.D.

    1987-04-01

    This report details the design of the abort dump for the Superconducting Super-Collider (SSC). The dump is made from graphite and designed to absorb the maximum beam energy of 400 MJ. The report considers long time activation effects of the dump components. The report concludes that the basic design of the abort dump is well defined

  17. SUPERCOLLIDER: String test success

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    On 14 August at the Superconducting Supercollider (SSC) Laboratory in Ellis County, Texas, the Accelerator Systems String Test (ASST) successfully met its objective by operating a half-cell of five collider dipole magnets, one quadrupole magnet, and two spool pieces at the design current of 6500 amperes

  18. SUPERCOLLIDER: Preparing initial experiments

    International Nuclear Information System (INIS)

    Anon.

    1991-01-01

    The Superconducting Supercollider (SSC) Laboratory in Ellis County, Texas, has taken an important step toward its scientific programme. While three letters of intent for large detectors had been invited, only two could be considered due to funding limitations. Two letters were received from existing collaborations (SDC and L*) and one from a merger of (EMPACT and TEXAS)

  19. SUPERCOLLIDER: Going international

    International Nuclear Information System (INIS)

    Anon.

    1994-01-01

    In the wake of the Superconducting Supercollider (SSC) debacle in the US, US particle physicists are regrouping. 'It is clear that physics interest cannot be changed by an act of Congress,' says Ed Berger of Argonne. As part of the SSC winding up, US Secretary of Energy has been requested to produce a plan to 'maximize the value of the investment in the project and minimizing the loss to the US, including recommendations as to the feasibility of utilizing SSC assets in whole or in part in pursuit of an international high energy physics endeavour.'

  20. Supercollider: Footprint approved

    International Nuclear Information System (INIS)

    Anon.

    1990-01-01

    With the 'footprint' - the precise location of the 87-kilometre US Superconducting Supercollider, SSC, and its ancillary buildings - now approved, teams of specialists commissioned by the State of Texas swing into action to procure the 17,000 acres (69 million square metres) of land covered by the project. With the SSC Laboratory in Ellis County and the US Department of Energy (DoE, the overseeing government agency) both hiring manpower for this project to collide 20 TeV (20,000 GeV) proton beams before the end of the century, the host State of Texas is providing a helping hand

  1. Supercollider: Design changes

    International Nuclear Information System (INIS)

    Anon.

    1990-01-01

    A major task faced by the new US Superconducting Supercollider (SSC) Laboratory as it began life early last year was to prepare a baseline design, cost and schedule for the site in Ellis County, Texas. The conceptual design developed by the SSC Central Design Group at Berkeley in 1986 was for a generic site, and served as the basis of the cost estimate submitted to Congress for fiscal year 1990. Under the terms of the contract between Universities Research Association (URA - the SSC parent organization) and the US Department of Energy to establish the SSC Laboratory, signed in January 1989, a report on the SiteSpecific Conceptual Design Report was complete by December

  2. Supercollider: Design changes

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1990-04-15

    A major task faced by the new US Superconducting Supercollider (SSC) Laboratory as it began life early last year was to prepare a baseline design, cost and schedule for the site in Ellis County, Texas. The conceptual design developed by the SSC Central Design Group at Berkeley in 1986 was for a generic site, and served as the basis of the cost estimate submitted to Congress for fiscal year 1990. Under the terms of the contract between Universities Research Association (URA - the SSC parent organization) and the US Department of Energy to establish the SSC Laboratory, signed in January 1989, a report on the SiteSpecific Conceptual Design Report was complete by December.

  3. SUPERCOLLIDER: Pros and cons

    International Nuclear Information System (INIS)

    Anon.

    1993-01-01

    As this issue goes to press, proponents and opponents of the US Superconducting Supercollider (SSC), now under construction in Ellis County, Texas, are preparing for a major confrontation in the US Senate. (In June, the House of Representatives voted 280-150 to pull the rug out from under the SSC's feet, and prematurely terminate construction of the 87-kilometre proton-proton collider.) In the face of such uncertainty, the Texas National Research Laboratory Commission has withheld $79 million of state support, making for major SSC cash flow problems. Just as tunneling progress was starting to overtake the planned schedule, one of the four big tunneling machines has been stopped

  4. SSC [Superconducting Super Collider] site evaluations

    International Nuclear Information System (INIS)

    1988-11-01

    With this report, the SSC Site Task Force forwards to the Director, Office of Energy Research, US Department of Energy (DOE), its evaluation of the technical criteria and life-cycle costs for the proposed SSC sites judged to be the best qualified. The criteria against which each site was evaluated are those set forth in the Invitation for Site Proposals for the Superconducting Super Collider (DOE/ER-0315) (Invitation) which was prepared by the Task Force and issued in April 1987. The methodology followed by the Task Force in this report and in all other phases of the proposal evaluation has been consistent with the SSC site selection process approved by DOE's Energy System Acquisition Advisory Board (ESAAB). The goal of the site selection process is to identify a site that will permit the highest level of research productivity and overall effectiveness of the SSC at a reasonable cost of construction and operation and with minimial impact on the environment. The Task Force acknowledges that all seven sites are, indeed, highly qualified locations for the construction and operation of the SSC on the basis of technical and cost considerations. In performing its evaluation, which is presented in this paper, the Task Force took an in-depth look at each site on the basis of site visits and extensive technical analyses. A consensus rating for each technical evaluation criterion and subcriterion was developed for each site

  5. 1st International Industrial Symposium on the Supercollider

    CERN Document Server

    IISSC; Supercollider 1

    1989-01-01

    IISSC '89 was a tremendous success. A total of 635 people attended this educational forum which was dedicated to further the understanding of the design, construction and operation of the Superconducting Supercollider (SSC). A total of 110 presentations and addresses were given. The topics discussed covered .all aspects of the SSC including: Magnet Technology Cryogenics Conventional Facilities Technical Systems Detectors Related Accelerator Technology Superconducting Wire/Cable ApproXimately 38% of the presentations addressed superconducting magnet technology, 16% were devoted to detector technology, 10% addressed superconducting wire/ cable, and the balance was equally split between the remaining topics. A special award was presented to Professor M. Tigner for his meritorious contribution to the Superconducting Supercollider (SSC). The award was presented on behalf of the IISSC Board of Directors. Keynote speakers included: Gerald 'Bachy, CERN Joe Barton, Representative from Texas, 6th Disctrict Ed...

  6. Supersymmetry at hadron supercolliders

    International Nuclear Information System (INIS)

    Dzialo, D.L.

    1989-01-01

    At the next generation of hadron supercolliders, the proposed US Superconducting Supercollider (SSC) and the European Large Hadron Collider (LHC), protons will be collided at such high energy to allow the creation of new particles with masses greater those that have been previously created in the laboratory. One of the most important questions to be resolved at these accelerators is whether or not any supersymmetric extension of the Standard Model is manifest below the TeV scale. It is expected that the strongly-interacting supersymmetric particles, the gluinos and squarks, will be pair-produced in the most abundance there. Light gluinos primarily decay into quarks and the lightest supersymmetric particle, which is assumed to escape detection; this gives the classic supersymmetric signature of events with large missing momentum. It is known, however, that for gluinos of masses larger than just 100 GeV this process is no longer the preferred gluino decay channel. New signals must therefore be sought to either detect these particles, or to set meaningful lower mass limits. It is in this work that such new detection strategies for supersymmetry at hadron supercolliders are proposed. Gluino and squark production rates and decay channels are studied in a model-independent fashion over the entire theoretical mass range of interest. New experimental signatures are proposed and compared with sources of background over a wide region of the parameter space that characterizes different supersymmetric models

  7. Status of superconducting magnet development (SSC, RHIC, LHC)

    International Nuclear Information System (INIS)

    Wanderer, P.

    1993-01-01

    This paper summarize recent superconducting accelerator magnet construction and test activities at the Superconducting Super Collider Laboratory (SSC), the Large Hadron Collider at CERN (LHC), and the Relativistic Heavy Ion Collider at Brookhaven (RHIC). Future plan are also presented

  8. Status of superconducting magnet development (SSC, RHIC, LHC)

    International Nuclear Information System (INIS)

    Wanderer, P.

    1993-01-01

    This paper summarizes recent superconducting accelerator magnet construction and test activities at the Superconducting Super Collider Laboratory (SSC), the Large Hardon Collider at CERN (LHC), and the Relativistic Heavy Ion Collider at Brookhaven (RHIC). Future plans are also presented

  9. SSC [Superconducting Super Collider] magnet technology

    International Nuclear Information System (INIS)

    Taylor, C.

    1987-09-01

    To minimize cost of the SSC facility, small-bore high field dipole magnets have been developed;some of the new technology that has been developed at several U.S. national laboratories and in industry is summarized. Superconducting wire with high J/sub c/ and filaments as small as 5μm diameter is not produced iwht mechanical properties suitable for reliable cable production. A variety of collar designs of both aluminum and stainless steel have been used in model magnets. A low-heat leak post-type cryostat support system is used and a system for accurate alignment of coil-collar-yoke in the cryostat has been developed. Model magnets of 1-m, 1.8 m, 4.5 m, and 17 m lengths have been build during the past two years. 23 refs., 5 figs., 2 tabs

  10. SSC [Superconducting Super Collider] magnet mechanical interconnections

    International Nuclear Information System (INIS)

    Bossert, R.C.; Niemann, R.C.; Carson, J.A.; Ramstein, W.L.; Reynolds, M.P.; Engler, N.H.

    1989-03-01

    Installation of superconducting accelerator dipole and quadrupole magnets and spool pieces in the SSC tunnel requires the interconnection of the cryostats. The connections are both of an electrical and mechanical nature. The details of the mechanical connections are presented. The connections include piping, thermal shields and insulation. There are seven piping systems to be connected. These systems must carry cryogenic fluids at various pressures or maintain vacuum and must be consistently leak tight. The interconnection region must be able to expand and contract as magnets change in length while cooling and warming. The heat leak characteristics of the interconnection region must be comparable to that of the body of the magnet. Rapid assembly and disassembly is required. The magnet cryostat development program is discussed. Results of quality control testing are reported. Results of making full scale interconnections under magnet test situations are reviewed. 11 figs., 4 tabs

  11. Supercollider Endorsement

    International Nuclear Information System (INIS)

    Anon.

    1986-01-01

    Coinciding with the magnet selection decision for the US Superconducting Super Collider, many of the leading figures of the US particle physics community were together at the home of the SSC Central Design Group at Berkeley. A meeting, organized by Jack Sandweiss (Chairman of HEPAP) and Jim Cronin (Chairman of the Division of Particles and Fields), reviewed progress on the SSC project

  12. SUPERCOLLIDER: Progress

    International Nuclear Information System (INIS)

    Anon.

    1991-01-01

    The first building to be constructed on the Superconducting Supercolider (SSC) site in Ellis County, Texas, the 109,000 sq ft (football field size) Magnet Development Laboratory (MDL), is now practically complete

  13. The SSC superconducting air core toroid design development

    International Nuclear Information System (INIS)

    Fields, T.; Carroll, A.; Chiang, I.H.; Frank, J.S.; Haggerty, J.; Littenberg, L.; Morse, W.; Strand, R.C.; Lau, K.; Weinstein, R.; McNeil, R.; Friedman, J.; Hafen, E.; Haridas, P.; Kendall, H.W.; Osborne, L.; Pless, I.; Rosenson, L.; Pope, B.; Jones, L.W.; Luton, J.N.; Bonanos, P.; Marx, M.; Pusateri, J.A.; Favale, A.; Gottesman, S.; Schneid, E.; Verdier, R.

    1990-01-01

    Superconducting air core toroids show great promise for use in a muon spectrometer for the SSC. Early studies by SUNY at Stony Brook funded by SSC Laboratory, have established the feasibility of building magnets of the required size. The toroid spectrometer consists of a central toroid with two end cap toroids. The configuration under development provides for muon trajectory measurement outside the magnetic volume. System level studies on support structure, assembly, cryogenic material selection, and power are performed. Resulting selected optimal design and assembly is described. 4 refs., 6 figs

  14. Supercollider 4

    International Nuclear Information System (INIS)

    Nonte, J.

    1992-01-01

    This Symposium on the superconducting super collider included a series of parallel technical sessions offering papers on the following topics: education, superconductors, environment, safety, health, magnets, detectors, cryogenics, quality assurance, technology transfer, accelerators, and special sessions on SSC for the Layman and Small Disadvantaged Business Opportunities. These papers had been indexed separately and can be found elsewhere

  15. Measurement of AC electrical characteristics of SSC superconducting dipole magnets

    International Nuclear Information System (INIS)

    Smedley, K.M.; Shafer, R.E.

    1992-01-01

    Experiments were conducted to measure the AC electrical characteristics of SSC superconducting dipole magnets over the frequency range of 0.1 Hz to 10 kHz. A magnet equivalent circuit representing the magnet DC inductance, eddy current losses, coil-to-ground and turn-to-turn capacitance, was synthesized from the experimental data. This magnet equivalent circuit can be used to predict the current ripple distribution along the superconducting magnet string and can provide dynamic information for the design of the collider current regulation loop

  16. The Superconducting Super Collider (SSC) linac

    International Nuclear Information System (INIS)

    Watson, J.M.

    1990-09-01

    The preliminary design of the 600 MeV H - linac for the Superconducting Super Collider injector is described. The linac must provide a 25 mA beam during 7--35 μs macropulses at Hz within injection bursts. Normalized transverse emittances of less than 0.5 π mm-mrad (rms) are required for injection into the Low Energy Booster synchrotron. Cost, ease of commissioning, and operational reliability are important considerations. The linac will consists of an H - source with electrostatic LEBT, 2.5 MeV radiofrequency quadrupole accelerator, a 70 MeV drift-tube linac, and 530 MeV and the side-coupled linac operates at 1284 MHz. A modest total length of 150 m results from the tradeoff between cost optimization and reliability. The expected performance from beam dynamics simulations and the status of the project are described. 11 refs., 1 fig., 6 tabs

  17. SSC [Superconducting Super Collider] dipole coil production tooling

    International Nuclear Information System (INIS)

    Carson, J.A.; Barczak, E.J.; Bossert, R.C.; Brandt, J.S.; Smith, G.A.

    1989-03-01

    Superconducting Super Collider dipole coils must be produced to high precision to ensure uniform prestress and even conductor distribution within the collared coil assembly. Tooling is being prepared at Fermilab for the production of high precision 1M and 16.6M SSC dipole coils suitable for mass production. The design and construction methods builds on the Tevatron tooling and production experience. Details of the design and construction methods and measured coil uniformity of 1M coils will be presented. 4 refs., 10 figs

  18. Effect of transients on the beam in the Superconducting Supercollider Coupled-Cavity Linac

    International Nuclear Information System (INIS)

    Young, L.M.; Nath, S.

    1992-01-01

    Each module of the Superconducting Super Collider (SSC) Coupled-Cavity Linac (CCL) consists of eight tanks (10 accelerating cells each) coupled with bridge couplers. The radio frequency (rf) power drive is in the center of the module at the bridge coupler between the fourth and fifth tanks. In this simulation of the beam dynamics, the rf power is turned on 10 μs before the beam is turned on. This time lapse allows the fields to build up and stabilize before they are required by the beam. When the beam is turned on, the beam loading causes the fields to change. This transient state of the fields together with their effect on the beam is presented. A model has been developed to calculate field distribution throughout the module as a function of time. Beam dynamics simulations were run with the results of this model at several times during the beam pulse. An estimate of the effect of the transients is given by the results of these simulations

  19. Supercollider physics

    International Nuclear Information System (INIS)

    Quigg, C.

    1985-03-01

    The physics that can be explored with multi-TeV supercolliders is reviewed, including parton distributions, hadron jet production, the standard electroweak theory and minimal extensions to it, technicolor, supersymmetry, and compositeness. 19 refs., 11 figs

  20. New technique for wiring SSC superconducting sextupole corrector coils

    International Nuclear Information System (INIS)

    Leon, B.

    1985-01-01

    There exists in the electronics industry, a technology for the manufacture of printed circuit (PC) boards which is directly transferable into the creation of highly controlled coils, such as the SSC sextupole superconducting corrector coils. This technology, which uses a process of laying down insulated wire in highly controlled patterns has heretofore been confined exclusively to the manufacture of high density printed circuit (PC) boards, possibly due to an ignorance of its utility in the field of precision winding of coils. This ability to fix wires in a well defined location can be used to produce precision wound coils in a very cost-effective manner. These coils may be superior in quality to conventionally made coils. Before describing what can be created with this technology, it is necessary to take a look at this coil winding process, the MULTIWIRE process, and the industry which has utilized this technology

  1. A new technique for wiring SSC superconducting sextupole corrector coils

    International Nuclear Information System (INIS)

    Leon, B.

    1985-01-01

    There exists in the electronics industry, a technology for the manufacture of printed circuit (PC) boards which is directly transferable into the creation of highly controlled coils, such as the SSC sextupole superconducting corrector coils. This technology, which uses a process of laying down insulated wire in highly controlled patterns, has heretofore been confined excusively to the manufacture of high density printed circuit (PC) boards, possibly due to an ignorance of its utility in the field of precision winding of coils. This ability to fix wires in a well defined location can be used to produce precision wound coils in a very cost-effective manner. These coils may be superior in quality to conventionally made coils. Before describing what can be created with this technology, it is necessary to take a look at this coil winding process, the MULTIWIRE process, and the industry which has utilized this technology

  2. SUPERCOLLIDER: A GEM of a detector

    International Nuclear Information System (INIS)

    Anon.

    1993-01-01

    Now being prepared as a major experimental facility for the 87- kilometre Superconducting Supercollider (SSC) being built in Ellis County, Texas, is the GEM detector project. GEM thus becomes the companion to the Solenoidal Detector Collaboration (SDC), the first major SSC detector to emerge (March 1992, page 13). This is in keeping with the SSC Laboratory's aim of two major detectors with overlapping and complementary strengths. GEM is designed to observe all SSC signatures, with emphasis on precise measurement of electrons, photons and muons. Hence the name GEM - ''Gammas, Electrons and Muons.'' Design goals are clean signatures for leptons, jets, and missing transverse energy, maximum sensitivity to narrow resonances, and low backgrounds. Also important is maintaining significant capability at high luminosity (10 34 cm -2 s -1 ). GEM has some distinctive features. A key concept is the exterior magnet, surrounding all detector elements. Inside the magnet are a muon tracking system, a precision calorimeter, and a compact central tracker. This allows the muon momentum to be measured the air of the radiation shielded area outside the thick calorimeter, giving both high precision and robustness at high luminosity. A large magnet gives a large lever arm (at least 4 m) for precise muon momentum measurement. Placing the magnet outside also minimizes the material between tracker and calorimeters, so that the calorimeters are limited only by their inherent resolutions

  3. Superconductivity

    International Nuclear Information System (INIS)

    Langone, J.

    1989-01-01

    This book explains the theoretical background of superconductivity. Includes discussion of electricity, material fabrication, maglev trains, the superconducting supercollider, and Japanese-US competition. The authors reports the latest discoveries

  4. Electrical characteristics of long strings of SSC superconducting dipoles

    International Nuclear Information System (INIS)

    Shafer, R.E.; Smedley, K.M.

    1992-01-01

    Because long strings of series-connected superconducting magnets have no dc resistance and low ac losses, the string behaves like a shorted transmission line. The string is thus resonant at multiple half-wavelengths unless damped by the inclusion of resistors that couple to the LdI/dt voltage across the magnet inductance. Based on the measured ac characteristics of individual magnets, it is possible to predict the electrical properties of long strings of magnets for a variety of damping resistors. These strings can be simulated using an analytic representation in FORTRAN (using complex-number notation) or a discrete-component equivalent-circuit modelling program (e.g., SPICE). Various electrical parameters, including characteristic impedance, signal velocity, induced power-supply ripple current, attenuation lengths, and driving-point impedances, can be predicted, and the damping resistor value can be optimized. Comparisons will be made to measurements on a long string of superconducting Tevatron magnets, and some predictions will be made for the SSC collider magnet system

  5. Geotechnical characterization and construction methods for SSC tunnel excavation

    International Nuclear Information System (INIS)

    Nelson, P.P.; Lundin, T.K.

    1990-06-01

    The site for the Superconducting Super Collider (SSC) facility was selected in 1988 after a nationwide proposal competition. The selected site is located in Ellis County, Texas, surrounding the town of Waxahachie which is about 30 miles (48 km) south of the City of Dallas central business district. This paper will describe the geotechnical conditions anticipated for excavation at the SSC site. A general geologic and geomechanical description of the rock present will be followed by a summary of the site-specific conceptual design for the tunneled components of the SSC machine. The Supercollider project will include about 70 miles (113) km of tunnel excavation

  6. Design and analysis of the SSC [Superconducting Super Collider] dipole magnet suspension system

    International Nuclear Information System (INIS)

    Nicol, T.H.; Niemann, R.C.; Gonczy, J.D.

    1989-03-01

    The design of the suspension system for Superconducting Super Collider (SSC) dipole magnets has been driven by rigorous thermal and structural requirements. The current system, designed to meet those requirements, represents a significant departure from previous superconducting magnet suspension system designs. This paper will present a summary of the design and analysis of the vertical and lateral suspension as well as the axial anchor system employed in SSC dipole magnets. 5 refs., 9 figs., 4 tabs

  7. A liquid nitrogen temperature SSC [Superconducting Super Collider

    International Nuclear Information System (INIS)

    McAshan, M.S.; VanderArend, P.

    1987-04-01

    Under the assumption that new developments in the science of superconductivity will lead to dipole magnets suitable for the SSC that have the same properties with regard to field, field quality, size and cost as those in the present conception of the collider, but operating at 77 K rather than 4.35 K; the initial cost of the collider facility is found to be less by $213 M out of the $2,000 M actual construction cost for the collider technical systems and the conventional facilities estimated in the Conceptual Design Report. EDI and contingency is not included in these figures. Operation at the higher temperature is not, however, an unequivocal advantage. The beam line vacuum system in the 77 K case presents problems that will require a larger magnet aperture for satisfactory solution. The costs of this together with the cost of the development and construction of the new vacuum system required is estimated to be $156 M. The net capital cost saving associated with the higher temperature operation is thus found to be $57 M or about 3% of the estimated cost. In addition it is estimated that the operating cost of the facility will under conditions be less by $27.5 M per year in the steady-state including an allowance for the greater availability of the simpler cryogenic system. 14 refs., 1 fig., 4 tabs

  8. EMPACT/TEXAS: A letter of intent to the Superconducting Supercollider

    International Nuclear Information System (INIS)

    Duek, E.

    1991-01-01

    A letter of intent to write a proposal is presented to the SSC by the EMPACT/TEXAS Collaboration. The proposed detector should provide for a balanced measurement of electrons, photons, muons, jets and missing momenta; all of these may carry relevant information on high-mass particles and other high P T phenomena at the SSC. This detector includes, among others, a transition radiation detector and tracker, a scintillating fiber pre-radiator with silicon pads and a hermetic liquid argon or scintillating fiber calorimetry. Preliminary simulation calculations guiding detector design are discussed. A summary of the physics objectives of the experiment as well as the experimental apparatus - and alternative technologies - are presented

  9. Conceptual design of a superconducting solenoid for a magnetic SSC [Superconducting Super Collider] detector

    International Nuclear Information System (INIS)

    Fast, R.W.; Grimson, J.H.; Kephart, R.D.; Krebs, H.J.; Stone, M.E.; Theriot, D.; Wands, R.H.

    1988-07-01

    The conceptual design of a large superconducting solenoid suitable for a magnetic detector at the Superconducting Super Collider (SSC) has begun at Fermilab. The magnet will provide a magnetic field of 2 T over a volume 8 m in diameter by 16 m long. The particle-physics calorimetry will be inside the field volume and so the coil will be bath cooled and cryostable; the vessels will be stainless steel. Predictibility of performance and the ability to safely negotiate all probable failure modes, including a quench, are important items of the design philosophy. Although the magnet is considerably larger than existing solenoids of this type and although many issues of manufacturability, transportability and cost have not been completely addressed, our conceptual design has convinced us that this magnet is a reasonable extrapolation of present technology. 2 figs., 2 tabs

  10. Heater induced quenches in SSC [Superconducting Super Collider] model dipoles

    International Nuclear Information System (INIS)

    Hassenzahl, W.V.

    1986-10-01

    A 1-m long SSC dipole constructed at the Lawrence Berkeley laboratory was subjected to a series of heater induced quenches to determine: axial quench propagation velocities, transverse quench propagation, and conductor temperature rise. Quenches were produced by 3 heaters at different locations in the magnet and at several currents. The results of these studies are described and are compared to previously published theoretical studies of quenches on the SSC dipoles. These results are shown to be in agreement with the calculations of the program ''QUENCH'', which includes an increase of the quench velocity during the first few milliseconds of the quench

  11. Radioactivation in ''quiet'' sections of the SSC [Superconducting Super Collider

    International Nuclear Information System (INIS)

    Cossairt, J.D.

    1987-10-01

    Estimation of induced radioactivity in the ''quiet'' sections of the SSC is approached using elementary methods. Estimates are given of total activity and residual dose rates on the surface of magnets in the quiet regions, as well as estimates of the activation of tunnel concrete. The residual radioactivity produced in the magnets and concrete walls of the ''quiet'' regions of the SSC are found to be quite small and of little radiological impact, but that simple scaling could yield results for more ''lossy'' regions

  12. Computing and data handling requirements for SSC [Superconducting Super Collider] and LHC [Large Hadron Collider] experiments

    International Nuclear Information System (INIS)

    Lankford, A.J.

    1990-05-01

    A number of issues for computing and data handling in the online in environment at future high-luminosity, high-energy colliders, such as the Superconducting Super Collider (SSC) and Large Hadron Collider (LHC), are outlined. Requirements for trigger processing, data acquisition, and online processing are discussed. Some aspects of possible solutions are sketched. 6 refs., 3 figs

  13. Radiation damage testing at the SSC [Superconducting Super Collider

    International Nuclear Information System (INIS)

    Chinowsky, W.; Thun, R.

    1990-06-01

    A Task Force on Radiation Damage Testing met at the SSC Laboratory on March 5--6, 1990. This Task Force was asked to assess the availability of appropriate facilities for radiation damage tests of SSC detector materials and components. The Task Force was also instructed to review the techniques and standards for conducting such tests. Semiconductors were considered separately from other detector materials. Radiation damage test of electronic devices generally require exposures to both ionizing radiation and neutrons, whereas non-electric components such as plastic scintillating materials, adhesives, cable insulation, and other organic polymers are adequately tested with ionizing radiation only. Test standards are discussed with respect to irradiation techniques, environmental factors, dosimetry, and mechanisms whereby various materials are damaged. It is emphasized that radiation sources should be chosen to duplicate as much as possible the expected SSC environment and that the effects from ionizing particles and from neutrons be investigated separately. Radiation damage tests at reactors must be designed with particular care complex spectra of neutrons and gamma rays are produced at such facilities. It is also essential to investigate dose-rate effects since they are known to be important in many cases. The required irradiations may last several months and are most easily carried out with dedicated radioactive sources. Environmental factors such as the presence of oxygen when testing plastic scintillators, or temperature when measuring semiconductor annealing effects, must also be taken into account. The importance of reliable dosimetry is stressed and suitable references cited. Finally, it is noted that an understanding of the mechanisms for radiation damage in semiconductor and other materials is important in planning irradiations and evaluating results

  14. Conductor development for the Superconducting Super Collider (SSC)

    International Nuclear Information System (INIS)

    Gregory, E.

    1988-01-01

    This review investigates the developments in fine filamentary materials over the last three years and traces how the relations between the magnet requirements and property improvements have fashioned SSC conductor specifications. The review emphasizes factors that affect filament nonuniformity and the overall quality of the product. The elimination of proximity effect-induced coupling in SCC type conductors, by introducing small percentages of manganese into the copper between the filaments, is discussed. Modification of a Fermi kit has produced materials with improved critical current densities. The possibility of using this approach to make conductors for accelerator magnets is assessed

  15. Design features of the SSC [Superconducting Super Collider] dipole magnet

    International Nuclear Information System (INIS)

    Willen, E.; Cottingham, J.; Ganetis, G.

    1989-01-01

    The main ring dipole for the SSC is specified as a high performance magnet that is required to provide a uniform, 6.6 T field in a 4 cm aperture at minimum cost. These design requirements have been addressed in an R ampersand D program in which the coil design, coil mechanical support, yoke and shell structure, trim coil and beam tube design, and a variety of new instrumentation, have been developed. The design of the magnet resulting from this intensive R ampersand D program, including various measurements from both 1.8 m and 17 m long models, is reviewed. 7 refs., 3 figs

  16. Supercollider design submitted

    International Nuclear Information System (INIS)

    Anon.

    1986-01-01

    The research and development programme for the proposed US Superconducting Super Collider (SSC) passed a major milestone on schedule with the submission of a conceptual design report to the US Department of Energy (DOE) on 31 March. Since then, the design has been favourably reviewed by DOE officials

  17. Test results from recent 1.8-m SSC [Superconducting Super Collider] model dipoles

    International Nuclear Information System (INIS)

    Wanderer, P.; Cottingham, J.G.; Dahl, P.

    1988-01-01

    We report results from four 1.8 m-long dipoles built as part of the Superconducting Super Collider (SSC) RandD program. Except for length, these models have the features of the SSC design, which is based on a two-layer cosine theta coil with 4 cm aperture. As compared to the 17 m design length SSC dipoles, these 1.8 m magnets are a faster and more economical way of testing design changes in field shape, conductor support in the coil straight-section and ends, etc. The four magnets reported here all reach fields in excess of 7.5T with little training and have excellent field shape. 10 refs., 2 figs., 3 tabs

  18. Model SSC [Superconducting Super Collider] dipole magnet cryostat assembly at Fermilab

    International Nuclear Information System (INIS)

    Niemann, R.C.

    1989-03-01

    The Superconducting Super Collider (SSC) magnet development program includes the design, fabrication and testing of full length model dipole magnets. A result of the program has been the development of a magnet cryostat design. The cryostat subsystems consist of cold mass connection-slide, suspension, thermal shields, insulation, vacuum vessel and interconnections. Design details are presented along with model magnet production experience. 6 refs., 13 figs

  19. A bipolar monolithic preamplifier for high-capacitance SSC [Superconducting Super Collider] silicon calorimetry

    International Nuclear Information System (INIS)

    Britton, C.L. Jr.; Kennedy, E.J.; Bugg, W.M.

    1990-01-01

    This paper describes a preamplifier designed and fabricated specifically to address the requirements of silicon calorimetry for the Superconducting Super Collider (SSC). The topology and its features are discussed in addition to the design methodology employed. The simulated and measured results for noise, power consumption, and speed are presented. Simulated an measured data for radiation damage effects as well as data for post-damage annealing are also presented. 8 refs., 7 figs., 2 tabs

  20. Controlling the crossing angle in the SSC [Superconducting Super Collider

    International Nuclear Information System (INIS)

    Garren, A.A.; Johnson, D.E.

    1989-04-01

    The colliding beams in the SSC must cross at a small angle, so that when the bunches pass each other away from the interaction point (IP), they are sufficiently separated to avoid disruptive beam-beam forces. However, the crossing angle is so small that the adjacent quadrupoles must be common to both beams. Only after passing through four common quadrupoles on each side of the IP, are the beams split by vertical dipoles into separate beamlines. In order to make the closed orbits of the two beams cross at a definite angle at the IP (within a range up to 150 μrad), a series of correction dipoles are placed in the insertions. If these dipoles are excited in such a way as to control the closed orbits alone, the dispersion will be mismatched, reaching values of up to 50 cm in the arcs. This mismatch is due to the closed orbit displacements in the interaction region (IR) quadrupoles, causing them to act as bending magnets. Therefore, both the closed orbit and dispersion must be matched simultaneously. Solutions to this problem are presented. 6 figs

  1. Field measuring probe for SSC [Superconducting Super Collider] magnets

    International Nuclear Information System (INIS)

    Ganetis, G.; Herrera, J.; Hogue, R.; Skaritka, J.; Wanderer, P.; Willen, E.

    1987-03-01

    The field probe developed for measuring the field in SSC dipole magnets is an adaptation of the rotating tangential coil system in use at Brookhaven for several years. Also known as the MOLE, it is a self-contained room-temperature mechanism that is pulled through the aperture of the magnet with regular stops to measure the local field. Several minutes are required to measure the field at each point. The probe measures the multipole components of the field as well as the field angle relative to gravity. The sensitivity of the coil and electronics is such that the field up to the full 6.6 T excitation of the magnet as well as the field when warm with only 0.01 T excitation can be measured. Tethers are attached to both ends of the probe to carry electrical connections and to supply dry nitrogen to the air motors that rotate the tangential windings as well as the gravity sensor. A small computer is attached to the probe for control and for data collection, analysis and storage. Digital voltmeters are used to digitize the voltages from the rotating coil and several custom circuits control motor speeds in the probe. The overall diameter of the probe is approximately 2 cm and its length is 2.4 m; the field sensitive windings are 0.6 m in length

  2. Vacuum technology issues for the SSC [Superconducting Super Collider

    International Nuclear Information System (INIS)

    Joestlein, H.

    1989-01-01

    The Superconducting Super Collider, to be built in Texas, will provide an energy of 40 TeV from colliding proton beams. This energy is twenty times higher than currently available from the only other cryogenic collider, the Fermilab Tevatron, and will allow experiments that can lead to a better understanding of the fundamental properties of matter. The energy scale and the size of the new machine pose intriguing challenges and opportunities for the its vacuum systems. The discussion will include the effects of synchrotron radiation on cryogenic beam tubes, cold adsorption pumps for hydrogen, methods of leak checking large cryogenic systems, the development of cold beam valves, and radiation damage to components, especially electronics. 9 figs., 1 tab

  3. An experimental study of the SSC [Superconducting Super Collider] magnet aperture criterion

    International Nuclear Information System (INIS)

    Merminga, N.; Edwards, D.; Finley, D.

    1988-01-01

    A beam dynamics experiment, performed in the Fermilab Tevatron, that was mainly motivated by planning for the Superconducting Super Collider (SSC) is described. Nonlinearities are introduced in the Tevatron by special sextupoles in order to stimulate the SSC environment. ''Smear'' is one of the parameters used to characterize the deviation from linear behavior. Smear is extracted from experimental data and compared with calculation over a wide range of conditions. The agreement is excellent. The closed orbit at injection trajectory reveal no deterioration even at the highest sextupole excitations. Measurements of the dynamic aperture are in general agreement with prediction. Particles captured on nonlinear resonance islands are directly observed and measurements are performed for the first time. The stability of the islands under tune modulation is investigated. 4 refs., 8 figs

  4. SSC string test facility for superconducting magnets: Testing capabilities and program for collider magnets

    International Nuclear Information System (INIS)

    Kraushaar, P.; Burgett, W.; Dombeck, T.; McInturff, A.; Robinson, W.; Saladin, V.

    1993-05-01

    The Accelerator Systems String Test (ASST) R ampersand D Testing Facility has been established at the SSC Laboratory to test Collider and High Energy Booster (HEB) superconducting magnet strings. The facility is operational and has had two testing periods utilizing a half cell of collider prototypical magnets with the associated spool pieces and support systems. This paper presents a description of the testing capabilities of the facility with respect to components and supporting subsystems (cryogenic, power, quench protection, controls and instrumentation), the planned testing program for the collider magnets

  5. Development of the SSC [Superconducting Super Collider] trim coil beam tube assembly

    International Nuclear Information System (INIS)

    Skaritka, J.; Kelly, E.; Schneider, W.

    1987-01-01

    The Superconducting Super Collider uses ≅9600 dipole magnets. The magnets have been carefully designed to exhibit minimal magnetic field harmonics. However, because of superconductor magnetization effects, iron saturation and conductor/coil positioning errors, certain harmonic errors are possible and must be corrected by use of multipole correctors called trim coils. For the most efficient use of axial space in the magnet, and lowest possible current, a distributed internal correction coil design is planned. The trim coil assembly is secured to the beam tube, a uhv tube with special strength, size, conductivity and vacuum. The report details the SSC trim coil/beam tube assembly specifications, history, and ongoing development

  6. Structural performance of the first SSC [Superconducting Super Collider] Design B dipole magnet

    International Nuclear Information System (INIS)

    Nicol, T.H.

    1989-09-01

    The first Design B Superconducting Super Collider (SSC) dipole magnet has been successfully tested. This magnet was heavily instrumented with temperature and strain gage sensors in order to evaluate its adherence to design constraints and design calculations. The instrumentation and associated data acquisition system allowed monitoring of the magnet during cooldown, warmup, and quench testing. This paper will focus on the results obtained from structural measurements on the suspension system during normal and rapid cooldowns and during quench studies at full magnet current. 4 refs., 9 figs

  7. Development of superconducting wire and cable for the SSC project in Sumitomo Electric Industries

    International Nuclear Information System (INIS)

    Sashida, T.; Saito, S.; Oku, G.; Kurimoto, K.; Yamada, Y.; Yokota, M.; Ohmatsu, K.; Nagata, M.

    1991-01-01

    As a large production volume of NbTi superconducting wire and cable is required for the SSC project, a production process has been developed at Sumitomo Electric to optimize critical variables of wire properties. To achieve high electrical properties and a high overall yield of NbTi alloy in the fabrication process, the authors have employed carefully designed large size multifilament billets weighing more than 350kg to decrease the number of billets in large production scale. The collider dipole magnet consists of inner and outer cables, and the cable should be as uniform as possible to ensure the performance of the magnets. The authors studied two aspects to obtain such uniformity of superconducting wire; one is the selection of unit weight and the other is the property of critical current density of a strand

  8. Compositeness: The supercollider frontier

    International Nuclear Information System (INIS)

    Peccei, R.D.

    1984-01-01

    In this report I discuss some of the reasons which point towards this 'nearby compositeness', and examine some of the physical phenomena that are connected with substructure which could be explored at a Supercollider. (orig./HSI)

  9. Manufacture of keystoned flat superconducting cables for use in SSC [Superconducting Super Collider] dipoles

    International Nuclear Information System (INIS)

    Royet, J.; Scanlan, R.M.

    1986-09-01

    The superconducting magnets used in the construction of particle accelerators are mostly built from flat, multistrand cables with rectangular or keystoned cross sections. In this paper we will emphasize the differences between the techniques for cabling conventional wires for cabling superconducting wires. Concepts for the tooling will be introduced. The effects of cabling parameters on critical current degradation are being evaluated in collaboration with NBS-Boulder

  10. Collarless, close-in, shaped iron aperture designs for the SSC [Superconducting Super Collider] dipole

    International Nuclear Information System (INIS)

    Gupta, R.C.; Morgan, G.H.

    1989-01-01

    The nominal-design SSC (Superconducting Super Collider) dipole encloses the coil in an iron yoke having a circular aperture. The radial gap between the coil and the iron is about 15 mm to provide space for a strong annular collar around the coil, and also to reduce the effects of iron saturation on central field harmonics. The 15 mm gap also reduces the desirable dipole field contributed by the iron. The present paper gives a coil and aperture configuration in which the gap is reduced to 5 mm at the midplane, in which the aperture is shaped to reduce the unwanted effects of iron saturation. The transfer function is increased about 5% at 6.6 Tesla and the unwanted harmonics are within SSC tolerances at all field levels. These designs would require that the yoke and containment vessel absorb the stresses due to assembly and magnetic forces. A short magnet is being built with a close-in shaped iron aperture and existing coil geometry to assess the benefits of this concept. 7 refs., 3 figs., 6 tabs

  11. The quality assurance of superconducting wire and cable for SSC magnets

    International Nuclear Information System (INIS)

    Pollock, D.; Baggett, P.; Capone, D.

    1991-03-01

    The success of the SSC depends on the consistency and uniformity of the superconducting magnets used in the main collider rings and the high energy booster. To a great extent the success of the magnets depends upon the quality of the superconductor wire and cable used in coil windings. As the SSC project has begun its transition from Research to Development, a new laboratory organization has been established to carry the design requirements from concept to reality. The SSCL Magnet Systems Division Quality Assurance Group has been working on the development of a quality management and analysis system for insuring superconductor uniformity through the understanding and control of manufacturing variation. Key areas of the QA activity include: the design and development of a computer database and analysis system for the collection and statistical analysis of superconductor materials data (containing: source physical and chemical properties, billet process history, and final product performance data); and the development of wire and cable product specifications which focus on the control of variation. As a result of this work several new concepts have been developed which will affect the traditional approach to superconductor wire and cable production. 18 refs., 5 figs., 1 tab

  12. 3D calculations of the Superconducting Super Collider (SSC) 3 Tesla magnet

    International Nuclear Information System (INIS)

    Lari, R.J.

    1984-01-01

    A 20 TeV Superconducting Super Collider (SSC) proton accelerator is being proposed by the High Energy Physics Community. One proposal would consist of a ring of magnets 164 km in circumference with a field strength of 3 Tesla and would cost 2.7 billion dollars. The magnet consists of stacked steel laminations with superconducting coils. The desired field uniformity is obtained for all fields from 0.2 to 3 Tesla by using three (or more) different pole shapes. These three different laminations are stacked in the order 1-2-3-1-2-3-... creating a truly three dimensional geometry. A three laminated stack 1-2-3 with periodic boundary conditions at 1 and 3 was assigned about 5000 finite elements per lamination and solved using the computer program TOSCA. To check the TOSCA results, the field of each of the three different shaped laminations was calculated separately using periodic boundary conditions and compared to the two dimensional field calculations using TRIM. This was done for a constant permeability of 2000 and using the B-H table for fully annealed 1010 steel. The difference of the field calculations in the region of interest was always less than +-.2%

  13. Quality analysis of superconducting wire and cable for SSC dipole magnets

    International Nuclear Information System (INIS)

    Pollock, D.A.

    1992-01-01

    This paper reports that a critical component of the SSC collider dipole magnets is superconducting cable. The uniformity and reliability requirements for the dipoles place stringent demands on the cable. These needs have been defined as various contract requirements in the material specifications for NbTi alloy, superconducting wire and cable. A supplied qualification program is being started by the SSCL with industry to establish reliable sources of superconductor cable. Key to this qualification program is the establishment by industry of detailed process methods and controls for wire and cable manufacture. To monitor conductor performance, a computer database is being developed by the SSCL Magnet Systems Division Quality Assurance Department. The database is part of a program for ensuring superconductor uniformity by focusing on the understanding and control of variation. A statistical and graphical summary of current data for key performance variables will be presented in light of the specification requirement for uniformity. Superconductor material characteristics to be addressed will include Wire Critical Current (I c ), Copper Ratio (Cu:SC), Wire Diameter, Wire Piece Length, and Cable Dimensional Control

  14. Superconducting magnets, cryostats, and cryogenics for the interaction region of the SSC

    International Nuclear Information System (INIS)

    Jayakumar, R.J.; Abramovich, S.; Zhmad, A.

    1993-10-01

    The Superconducting Super Collider (SSC) has two counterrotating 20-TeV proton beams that will be made to collide at specific interaction points to carry out high energy physics experiments. The Collider ring has two sites, West and East, for such Interaction Regions (IRs), and the conceptual design of the East Interaction Region is underway. The East IR, in the present stage of design, has two interaction points, the requirements for which have been specified in terms of distance L* to the nearest magnet and the beam luminosity. Based on these requirements, the optics for transition from arc regions or utility regions to the IR and for focusing the beams have been obtained. The optical arrangement consists of a tuning section of quadrupoles, the strength of which is adjusted to obtain the required beta squeeze; a pair of bending dipoles to reduce the beam separation from the nominal 900 mm to 450 mm; an achromat section of quadrupoles, which consist of two cold masses in one cryostnother pair of dipoles to bring the beams together at the required crossing angle; and a set of final focus quads facing the interaction point. The optics is symmetric about the interaction point, and the two interaction points are separated by a hinge region consisting of superconducting dipoles and quadrupoles similar to the arc region. In the regions where the beams are vertically bent and straightened out by dipoles, the beam traverses warm regions provided for placing beam collimators. The superconducting magnets, including the final focus quadrupoles, operate with supercritical He at 4 atm and a nominal temperature of 4.15 K. In this paper, descriptions of the magnets, the cryostats, and cryo bypasses around the warm region and interaction points are provided. Also discussed are the cooling requirements and design for the final focus quadrupole, which receives significant heat load from beam radiation

  15. Recent development of the Cu/Nb-Ti superconducting cables for SSC in Hitachi Cable, Ltd

    International Nuclear Information System (INIS)

    Sakai, S.; Iwaki, G.; Sawada, Y.; Moriai, H.; Ishigami, Y.

    1989-01-01

    In these few years, Cu/Nb-Ti superconducting cables for the dipole magnets of SSC projects have been developed in the industrial scale in Hitachi Cable, Ltd. The features of these developed conductors are as follows. (1) The diameter of Nb-Ti filaments is very small, 4-6 μm. (2) The critical current density (J c ) is very high, 2,850-3,050 A/mm 2 at 5 T on wires, 2750-2950 A/mm 2 at 5 T on cables in industrial scale. The champion J c of wires is 3,460 A/mm 2 at 5 T in the laboratory scale. (3) The RRR Residual Resistivity Ratio values of developed cables is very high, approximately 200, due to the newly developed high purity Oxygen Free Copper (OFC). (4) The conductors have been wound to the 1 m length dipole magnet in Hitachi Ltd., and it has generated 6.7 T in the central magnetic field at 6,595 A. The Cu/Cu-Mn/Nb-Ti composite wires which avoid the possibility of electrical coupling of the filaments have been produced in laboratory scale. The RRR of the copper stabilizer and J c properties have not degraded because of no metallurgical reactions between Cu and Mn, Nb-Ti and Mn. 7 refs., 9 figs., 4 tabs

  16. Status report on an engineering design study of hermetic liquid argon calorimetry for the SSC [Superconducting Super Collider

    International Nuclear Information System (INIS)

    Adams, T.; Davis, M.; DiGiacomo, N.J.

    1989-01-01

    There is general recognition that engineering issues are critical to the viability of liquid argon calorimetry (LAC) at the Superconducting Super Collider (SSC). We have undertaken to quantitatively address these issues and, if possible, perform a preliminary design of a ''proof of principle'' LAC for SSC. To establish LAC as viable at SSC, we must demonstrate that the physics performance of the device is acceptable, despite the presence of dead material due to vessels and support structure. Our approach involves the construction, by a team of physicists and engineers, of one three dimensional model of the LAC system, built as a hierarchy of components and structures, from which we directly perform interferences checks, mechanical, thermal and magnetic analyses, particle tracking, hermeticity evaluation, physics simulation and assembly. This study, begun in February 1989 as part of the SSC generic detector R and D program, was immediately preceded by a workshop at which engineering details of existing and planned LAC systems were thoroughly examined. We describe below the status of our work, beginning with short descriptions of the tools used, the study requirements and LAC configuration baseline. We then detail the LAC design as it presently stands, including assembly considerations, and conclude with a quantitative assessment of the LAC hermeticity. 19 refs., 12 figs

  17. The modified high-energy transport code, HETC, and design calculations for the SSC [Superconducting Super Collider

    International Nuclear Information System (INIS)

    Alsmiller, R.G. Jr.; Alsmiller, F.S.; Gabriel, T.A.; Hermann, O.W.; Bishop, B.L.

    1988-01-01

    The proposed Superconducting Super Collider (SSC) will have two circulating proton beams, each with an energy of 20 TeV. In order to perform detector and shield design calculations at these higher energies that are as accurate as possible, it is necessary to incorporate in the calculations the best available information on differential particle production from hadron-nucleus collisions. In this paper, the manner in which this has been done in the High-Energy Transport Code HETC will be described and calculated results obtained with the modified code will be compared with experimental data. 10 refs., 1 fig

  18. Summary of supercollider physics

    International Nuclear Information System (INIS)

    Soper, D.E.

    1986-01-01

    Highlights from talks at the Supercollider Physics Topical Conference are presented. QCD related topics discussed are: improvements to Monte Carlo QCD calculations, including incorporation of initial state bremsstrahlumg and multiple scattering; better theoretical understanding of QCD, particularly small x behavior, heavy particle production and final state jet development and higher order QCD calculations, including jet calculus. Other areas discussed are:event characteristics and detection; testing the electroweak standard model, particularly the production of Higgs bosons and rare B decays; Supersymmetry and physics beyond the Standard Model

  19. Superconducting dipole magnet requirements for the Fermilab Phase 3 upgrade, SSC high energy booster, and Fermilab independent collider

    International Nuclear Information System (INIS)

    Nicol, T.H.; Kerby, J.S.

    1989-09-01

    In July 1988 a small working group was formed to develop a conceptual design for a high field superconducting dipole magnet suitable for use in the Phase III upgrade at Fermilab. The Phase III upgrade calls for replacement of the existing Tevatron with higher field magnets to boost the energy of the fixed target program to 1.5 TeV and to add a 1.8 TeV collider program. As the work of this group evolved it became clear that the resulting design might be applicable to more than just the proposed upgrade. In particular, it seemed plausible that the work might be applicable to the high energy booster (HEB) for the SSC. At the Breckenridge Workshop in August 1989 interest in a third project began to surface, namely the revamping of an earlier proposal for a dedicated collider at Fermilab. We refer to this proposal as the FNAL Independent Collider. The requirements for the dipole magnets for this independent collider appear to be remarkably similar to those proposed for the Phase III upgrade and the SSC HEB. The purpose of this report is to compare the conceptual design of the dipoles developed for the Phase III proposal with the requirements of those for the SSC HEB, the FNAL Independent Collider, and a hybrid design which could serve the needs of both. The Phase III design will be used as the reference point for parameter scaling. 4 figs., 3 tabs

  20. Conceptual design report for a superconducting coil suitable for use in the large solenoid detector at the SSC [Superconducting Super Collider

    International Nuclear Information System (INIS)

    Fast, R.W.; Grimson, J.H.; Krebs, H.J.; Kephart, R.D.; Theriot, D.; Wands, R.H.

    1989-01-01

    The conceptual design of a large superconducting solenoid suitable for a magnetic detector at the Superconducting Super Collider (SSC) was done at Fermilab. The magnet will provide a magnetic field of 1.7 T over a volume 8 m in diameter by 16 m long. The particle-physics calorimetry will be inside the field volume and so the coil will be bath cooled and cryostable; the vessels will be stainless steel. Predictability of performance and the ability to safely negotiate all probable failure modes, including a quench, are important items of the design philosophy. Our conceptual design of the magnet and calorimeter has convinced us that this magnet is a reasonable extrapolation of present technology and is therefore feasible. The principal difficulties anticipated are those associated with the very large physical dimensions and stored energy of the magnet. 5 figs

  1. Deflection analysis for an SSC [Superconducting Super Collider] dipole magnet with two external supports

    International Nuclear Information System (INIS)

    Nicol, T.H.

    1987-01-01

    SSC dipole magnets are presently supported at five mounting locations coincident with the internal cold mass supports. There is growing interest in reducing the number of external supports from five to two for reasons of simplified installation and alignment and as a cost reduction measure. This reports examines the placement of two external supports required to minimize the deflection of the cold mass assembly

  2. Fermilab R and D test facility for SSC [Superconducting Super Collider] magnets

    International Nuclear Information System (INIS)

    Strait, J.; Bleadon, M.; Hanft, R.; Lamm, M.; McGuire, K.; Mantsch, P.; Mazur, P.O.; Orris, D.; Pachnik, J.

    1989-02-01

    The test facility used for R and D testing of full scale development dipole magnets for the SSC is described. The Fermilab Magnet Test Facility, originally built for production testing of Tevatron magnets, has been substantially modified to allow testing also of SSC magnets. Two of the original six test stands have been rebuilt to accommodate testing of SSC magnets at pressures between 1.3 Atm and 4 Atm and at temperatures between 1.8 K and 4.8 K and the power system has been modified to allow operation to at least 8 kA. Recent magnets have been heavily instrumented with voltage taps to allow detailed study of quench location and propagation and with strain gage based stress, force and motion transducers. A data acquisition system has been built with a capacity to read from each SSC test stand up to 220 electrical quench signals, 32 dynamic pressure, temperature and mechanical transducer signals during quench and up to 200 high precision, low time resolution, pressure, temperature and mechanical transducer signals. The quench detection and protection systems is also described. 23 refs., 4 figs., 2 tabs

  3. Probing electroweak symmetry breaking at the SSC [Superconducting Super Collider]: A no-lose corollary

    International Nuclear Information System (INIS)

    Chanowitz, M.S.

    1987-01-01

    Low energy theorems are derived for scattering of longitudinally polarized W and Z's, providing the basis for an estimate of the observable signal at the SSC if electroweak symmetry breaking is due to new physics at the TeV scale

  4. Intermediate-mass Higgs boson and isosinglet neutral heavy lepton signals at hadron supercolliders

    International Nuclear Information System (INIS)

    Bhattacharya, G.

    1992-01-01

    The signals for the Standard Model intermediate-mass Higgs boson and isosinglet neutral heavy leptons at the forthcoming hadron supercolliders-the Superconducting Super Collider (SSC) and the CERN Large Hadron Collider (LHC), are studied. The author studies inclusive production of the Standard Model Higgs boson in the intermediate-mass region (M W approx-lt m H approx-lt 2M Z ) and its subsequent decay into two on- or off-shell W bosons that decay leptonically. Backgrounds from continuum W pair production and top quark pair production with semileptonic decays are investigated. The author concludes the Higgs boson signal may be observed via the decay H → W*W* → (ell bar v ell ) (bar ell' v' ell ) at the SSC for 145 GeV H approx-lt 2M Z and at the LHC for 150 GeV H approx-lt 2M Z if m t > 150 GeV. The author analyzes the search and discovery potential of isosinglet neutral heavy leptons (NHLs) produced via real or virtual W decay at pp supercolliders. The author considers the signal resulting from the leptonic decay of the NHL, and the two major backgrounds-continuum WZ, Wγ production and t bar tj production, where j is a hadronic jet. The decay patterns of NHL depend on its mass M N , and different search strategies are needed for the two mass regions M N W and M N > M Z . The author finds for m t ≥ 150 (200) GeV the signal is observable for M N ≤ 60 (70) GeV in the mass-region M N W , and up to M N ≅ 110 GeV for M N > M W , at both SSC and LHC. It is shown the non-observance of the signal (with a 4σ statistical significance) in the region M N W could put upper limits on the NHL coupling constants that would be an improvement over the limits obtainable from the CERN Large Electron Positron Collider (LEP I)

  5. 2nd International Industrial Symposium on the Supercollider

    CERN Document Server

    IISSC; Supercollider 2

    1990-01-01

    The Second International Industrialization Symposium on the Supercollider, IISSC, was held in Miami Beach Florida on March 14-16, 1990. It was an even bigger and more successful meeting than our ftrst in New Orleans in 1989. There were 691 attendees and 75 exhibitors. The enthusiasm shown by both the speakers and the audience was exhilarating for all attendees. The symposium again brought together the physicists and engineers designing the machine, the industrial organizations supporting the design and construction, the education community, and the governmental groups responsible for the funding and management of the SSC project. We believe it is this unique rnix which makes this particular meeting so valuable. The theme of this symposium was "The SSC-Americas Research Partnership" and the varied presentations throughout the meeting high-lighted that theme. The keynote speakers were: Dr. Roy Schwitters, Director of the SSC Mr. Paul F. Orefftce, Chairman of the Board of Dow Chemical Company Honorable W. Hinson...

  6. Statistical factors to qualify the superconducting magnets for the SSC based on warm/cold correlations

    International Nuclear Information System (INIS)

    Kim, K.; Devred, A.; Coles, M.; Tompkins, J.

    1993-05-01

    All of the SSC production magnets will be measured at room temperature (warm), but only a fraction of these will be measured at liquid helium temperature (cold). The fractional information will then be analyzed to determine warm acceptance criteria for the field quality of the SSC magnets. Regarding predictors of the field quality based on partial information, there are several observations and studies based on the warm/cold correlation. A different facet of the acceptance test is production control, which interprets the warm/cold correlation to adjust the process parameters. For these applications, we are evaluating statistical techniques relying on asymptotic estimators of the systematic errors and random errors, and their respective confidence intervals. The estimators are useful to qualify the population magnets based on a subset of sample magnets. We present the status of our work, including: (i) a recapitulation of analytic formulas, (ii) a justification based on HERA magnet experience, and (iii) a practical interpretation of these estimators

  7. A high gradient quadrupole magnet for the SSC [Superconducting Super Collider

    International Nuclear Information System (INIS)

    Taylor, C.; Caspi, S.; Helm, M.; Mirk, K.; Peters, C.; Wandesforde, A.

    1987-03-01

    A quadrupole magnet for the SSC has been designed with a gradient of 234 T/m at 6500 A. Coil ID is 40 mm. The two-layer windings have 9 inner turns and 13 outer turns per pole with a wedge-shaped spacer in each layer. The 30-strand cable is identical to that used in the outer layer of the SSC dipole magnet. Interlocking aluminum alloy collars are compressed around the coils using a four-way press and are locked with four keys. The collared coil is supported and centered in a cold split iron yoke. A one-meter model was constructed and tested. Design details including quench behavior are presented

  8. Magnet strength fluctuations in the SSC [Superconducting Super Collider] lattice: Part 2, Frequency modulation

    International Nuclear Information System (INIS)

    Goderre, G.P.

    1987-06-01

    This is a continuation of SSC-N-305. SSC-N-305 examined the effects of field strength modulation, when the modulation frequency (f/sub mod/) was equal to zero (i.e., current offset). The objective of this study is to examine the effect of field strength modulation with modulation frequencies other than zero. To this end, the tracking routine TEAPOT is modified to simulate frequency modulation of the current output from the 10 main SSC magnet power supplies. The amplitude (A/sub i/) and phase (phi/sub i/) of the modulation for the i/sup th/ power supply are chosen randomly. Effects of bore tube shielding are included only when studying 60 Hz modulation frequency. Bore tube shielding is due to the copper coating on the bore tube walls. This coating modifies the amplitude and phase of the modulation inside the bore tube. The bore tube is more effective at shielding the dipole field and it becomes most effective as the modulation frequency increases. 3 refs., 10 figs., 3 tabs

  9. Simulation of the SSC [Superconducting Super Collider] refrigeration system using the ASPEN/SP process simulator

    International Nuclear Information System (INIS)

    Rasson, J.; Dweck, J.

    1990-08-01

    The SSC Magnet must maintain at a super conducting temperature of 4 K. The proposed refrigeration cooling processes consist of fairly simple closed cycles which take advantage of the Joule-Thompson effect via a series of expansions and compressions of helium gas which has been precooled by liquid nitrogen. The processes currently under consideration consist of three cycles, the 20 K shield cooling, the 45 K helium refrigerator and the helium liquefier. The process units which are to be employed are compressors, turbines, expanders, mixers, flashes, two stream heat exchangers and multiple stream heat exchangers. The cycles are to be operated at or near steady state. Due to the large number of competing cooling sector designs to be considered and the high capital and operating costs of the proposed processes, the SSC Laboratory requires a software tool for the validation and optimization of the individual designs and for the performance of cost-benefit analyses among competing designs. Since these processes are steady state flow processes involving primarily standard unit operations, a decision was made to investigate the application of a commercial process simulator to the task. Several months of internal evaluations by the SSC Laboratory revealed that while the overall structure and calculation approach of number of the commercial simulators were appropriate for this task, all were lacking essential capabilities in the areas of thermodynamic property calculations for cryogenic systems and modeling of complex, multiple stream heat exchangers. An acceptable thermodynamics model was provided and a series of simple, but representative benchmark problems developed. The model and problems were provided to three software vendors. Based on the results of the benchmark test, the ASPEN/SP process simulator was selected for future modeling work

  10. Superconducting superconvulsion. Shock US decision

    International Nuclear Information System (INIS)

    Anon.

    1993-01-01

    After a baffling succession of seesaw decisions which saw the mood swing from the depths of pessimism to supreme optimism and back, on 21 October a US House of Representatives Committee proposed $640 million for the 'orderly termination' of the Superconducting Supercollider (SSC) project in Ellis County, Texas. By next July, the US Secretary of Energy is requested to produce a plan to 'maximize the value of the investment in the project and minimizing the loss to the US, including recommendations as to the feasibility of utilizing SSC assets in whole or in part in pursuit of an international high energy physics endeavour.' The SSC was to have been the biggest of them all - two 87-kilometre rings of superconducting magnets to collide proton beams at a total energy of 40 TeV (40,000 GeV) and search for the mechanisms underlying the behaviour of the quark constituents deep inside the colliding particles. It was from the start an ambitious project. It was meant to be. Conceived in the early 1980s amid all the Reagan euphoria of 'junk' bonds and heavy government borrowing, the SSC idea was in some ways a scientific parallel for the audacious technology of the Strategic Defense Initiative - 'Star Wars'

  11. Uses of particle identification for supercollider physics

    International Nuclear Information System (INIS)

    Quigg, C.

    1989-05-01

    I summarize the basic characteristics of the Superconducting Super Collider and describe the experimental environment of its high- luminosity interaction regions. I then review some of the discovery possibilities opened by the SSC, with special attention to the advantages conferred by particle identification. 16 refs., 8 figs

  12. Development of superconducting strand and cable with improved properties for use in SSC [Superconducting Super Collider] magnets

    International Nuclear Information System (INIS)

    Scanlan, R.M.

    1989-02-01

    The critical current requirement for the NbTi superconductor strand was set at 2750 A/mm 2 (5 T, 4.2 K) in the SSC Conceptual Design, compared with a value of 1800 A/mm 2 which was specified for the strand used in the Tevatron dipoles. In addition, a filament diameter of 5 μm, instead of the 9 μm diameter used in the Tevatron, was chosen to reduce field distortion at injection. In order to meet the requirements for field homogeneity, the dimensional requirements for both strand and cable were also tightened. The technical solutions employed to achieve these improved properties and the resulting specifications will be discussed. 9 refs

  13. Transient beam loading and rf power distribution in the SSC [Superconducting Super Collider

    International Nuclear Information System (INIS)

    Raka, E.C.

    1986-01-01

    Transient beam loading will occur in the SSC at injection as the fifteen individual batches from the High Energy Booster are loaded box-car fashion into the main rings. Periodic transient beam loading will be present also at injection due to the gaps between the successive batches as well as the gap that remains to be filled. Even after the rings have been ''filled'' there will remain the abort gap of 3.1 μsec. This can produce significant modulation of the phase and amplitude of the rf voltage seen by those bunches immediately following it unless corrective measures are taken. Two different methods of reducing this modulation will be discussed, each of which put certain requirements on the rf power distribution system

  14. Field quality of the end sections of SSC [Superconducting Super Collider] dipoles

    International Nuclear Information System (INIS)

    Hassenzahl, W.V.; Caspi, S.; Gilbert, W.; Helm, M.; Laslett, L.J.; Morgan, G.A.

    1986-09-01

    The central or two-dimensional field of a dipole magnet can be calculated with some precision. The fields at the end of the magnet, which are three-dimensional in nature, provide a more complicated problem. Starting with an end design that produced a relatively good end in terms of multipole components, a method of extending parts of the straight section was used to reduce the most important harmonics, the sextupole and decapole, to a negligible level. In addition, the effect of extending an iron yoke over the ends of a magnet was investigated and it was found to have little effect on the harmonics, though it will raise the dipole field. These results are encouraging as they imply that good ends can be developed with relative ease should the two dimensional cross-section of a dipole magnet such as the SSC have to be changed

  15. The Disappearing Fourth Wall: John Marburger, Science Policy, and the SSC

    Science.gov (United States)

    Crease, Robert

    2015-04-01

    John H. Marburger (1941-2011) was a skilled science administrator who had a fresh and unique approach to science policy and science leadership. His posthumously published book Science Policy up Close contains recollections of key science policy episodes in which he participated or observed closely. One was the administration of the Superconducting Supercollider (SSC); Marburger was Chairman of the Universities Research Association, the group charged with managing the SSC, from 1988-1994. Many accounts of the SSC saga attribute its demise to a combination of transitory factors: poor management, rising cost estimates, the collapse of the Soviet Union and thus of the Cold War threat, complaints by ``small science'' that the SSC's ``big science'' was consuming their budget, Congress's desire to cut spending, unwarranted contract regulations imposed by the Department of Energy (DOE) in response to environmental lapses at nuclear weapons laboratories, and so forth. Marburger tells a subtler story whose implications for science policy are more significant and far-reaching. The story involves changes in the attitude of the government towards large scientific projects that reach back to management reforms introduced by the administration of Presidents Johnson, Nixon, and Carter in the 1960s and 1970s. This experience impressed Marburger with the inevitability of public oversight of large scientific projects, and with the need for planners of such projects to establish and make public a cost and schedule tracking system that would model the project's progress and expenditures.

  16. A unique cabling designed to produce Rutherford-type superconducting cable for the SSC project

    International Nuclear Information System (INIS)

    Grisel, J.; Royet, J.M.; Scanlan, R.M.; Armer, R.

    1988-08-01

    Up to 25,000 Km of keystoned flat cable must be produced for the SSC project. Starting from a specification developed by Lawrence Berkeley Laboratory (LBL), a special cabling machine has been designed by Dour Metal. It has been designed to be able to run at a speed corresponding to a maximum production rate of 10 m/min. This cabling machine is the key part of the production line which consists of a precision Turkshead equipped with a variable power drive, a caterpillar, a dimensional control bench, a data acquisition system, and a take-up unit. The main features of the cabling unit to be described are a design with nearly equal path length between spool and assembling point for all the wires, and the possibility to run the machine with several over- or under-twisting ratios between cable and wires. These requirements led Dour Metal to the choice of an unconventional mechanical concept for a cabling machine. 4 refs., 2 figs

  17. Cold test facility for 1.8 m superconducting model magnets at the SSC

    International Nuclear Information System (INIS)

    LaBarge, A.

    1993-07-01

    A new facility has been constructed to measure the characteristic features of superconducting model magnets and cable at cryogenic temperatures -- a function which supports the design and development process for building full-scale accelerator magnets. There are multiple systems operating in concert to test the model magnets, namely: cryogenic, magnet power, data acquisition and system control. A typical model magnet test includes the following items: (1) warm measurements of magnet coils, strain gauges and voltage taps; (2) hipot testing of insulation integrity; (3) cooling with liquid nitrogen and then liquid helium; (4) measuring quench current and magnetic field; (5) magnet warm-up. While the magnet is being cooled to 4.22 K, the mechanical stress is monitored through strain gauges. Current is then ramped into the magnet until it reaches some maximum value and the magnet transitions from the superconducting state to the normal state. Normal-zone propagation is monitored using voltage taps on the magnet coils during this process, thus indicating where the transition began. The current ramp is usually repeated until a plateau current is reached, where the magnet has mechanically settled

  18. Test results from two 5m two-in-one superconducting magnets for the SSC

    International Nuclear Information System (INIS)

    Cottingham, J.G.; Dahl, P.F.; Fernow, R.C.

    1984-01-01

    Two 5m long superconducting dipole magnets with specifications similar to the reference design for the proposed Superconducting Super Collider have been successfully tested. The cos theta coils of the magnets were made from two layers of standard CBA/Tevatron NbTi superconductor, keystoned to an angle of 2.8 degrees. The inner diameter of the inner layer was 3.2 cm. The ends of the coils were flared to increase the minimum bending radius so that future magnets can be wound from prereacted Nb 3 Sn. The windings of the two-aperture magnets were clamped in a two-in-one iron yoke with a tensioned stainless steel shell. The fields of the two apertures were closely coupled, since the flux in one aperture returned through the other. The inner and outer layers of the coil were powered separately so that their short-sample limits would be reached simultaneously. With minimal training the magnets reached a central field of 6 T, the short sample limit of the conductor at the 4.5 K temperature of the liquid helium bath. At 2.6 K, a central field in excess of 7 T was reached, again with minimal training. The measured values of the allowed sextupole and decapole harmonics are within 10% of the calculated values and the non-allowed harmonics are all small or zero, as predicted. 3 references, 6 figures

  19. Performance of six 4.5 m SSC [Superconducting Super Collider] dipole model magnets

    International Nuclear Information System (INIS)

    Willen, E.; Dahl, P.; Cottingham, J.

    1986-01-01

    Six 4.5 m long dipole models for the proposed Superconducting Super Collider have been successfully tested. The magnets are cold-iron (and cold bore) 1-in-1 dipoles, wound with current density-graded high homogeneity NbTi cable in a two-layer cos θ coil of 40 mm inner diameter. The coil is prestressed by 15 mm wide stainless steel collars, and mounted in a circular, split iron yoke of 267 mm outer diameter, supported in a cylindrical yoke containment vessel. At 4.5 K the magnets reached a field of about 6.6 T with little training, or the short sample limit of the conductor, and in subcooled (2.6 - 2.4 K) liquid, 8 T was achieved. The allowed harmonics were close to the predicted values, and the unallowed harmonics small. The sextupole trim coil operated well above the required current with little training

  20. Soft physics with a supercollider

    International Nuclear Information System (INIS)

    Andersson, B.

    1984-01-01

    I discuss a set of possible, more or less adventurous, physics scenarios for the soft physics of a supercollider of 10-20 TeV cms energy. I also present extrapolations of the sizes of different quantities to these immense energies. One should always note that whether we like it or not, some 95-99% of the cross-section is soft physics at all energies. (orig.)

  1. The feasibility of low-mass conductors for toroidal superconducting magnets for SSC [Superconducting Super Collider] detectors

    International Nuclear Information System (INIS)

    Luton, J.N.

    1990-01-01

    An earlier study by Luton and Bonanos concluded that the design and fabrication of superconducting toroidal bending magnets would require a major effort but would be feasible. This study is an extension to examine the feasibility of low-mass conductors for such use. It included a literature search, consultations, with conductor manufacturers, and design calculations, but no experimental work. An unoptimized sample design that used a residual resistivity ratio for aluminum of 1360 and a current density of 3.5 kA/cm 2 over the uninsulated conductor for a 4.5-T toroid with 1 GJ of stored energy obtained a hot-spot temperature of 120 K with a maximum dump voltage of 3.6 kV and 24% of the initial current inductively transferred into the shorted aluminum structure. The stability margin was 200 mJ/cm 3 of cable space. Limiting the quench pressure to 360 atm to give conservative stresses in the sheath and assuming that the whole flow path quenched immediately resulted in helium taps that could be a kilometer apart if the flow friction factor were the same as that experienced in the Westinghouse (W) Large Coil Task (LCT) coil. This indicates that the 520-m conductor length of each of the 72 individual coil segments of a toroid would be a single flow path. If some practical uncertainties can be favorably resolved by producing and testing sample conductors, the use of a conductor with clad-aluminum stabilizer and extruded aluminum-alloy sheath should be feasible and economical. 9 refs., 3 figs

  2. Present status and physics prospects of SSC

    International Nuclear Information System (INIS)

    Sugimoto, Shojiro

    1990-01-01

    Physics prospects of Superconducting Super Collider (SSC) are discussed, referring to other coming colliders. In addition, the present status of the SSC project and detector proposals for the experiments are described. (author)

  3. SUPERCOLLIDER: Planning for experiments

    International Nuclear Information System (INIS)

    Anon.

    1987-01-01

    To push forward the necessarily lengthy preparations for experiments at the proposed US Superconducting Super Collider, a Workshop on Experiments, Detectors and Experimental Areas was held at Berkeley from 7 to 17 July. Participants looked ahead to the task of extracting physics (like the search for Higgs particles, supersymmetry or other heavy quarks and leptons) from the chaos of hadron collisions at 20 TeV beam energies with luminosities in excess of 10 32 . The door would also have to be left open for unexpected physics in these higher energy regions

  4. A permissive graphical patcher for supercollider synths

    OpenAIRE

    Dufeu, Frédéric

    2016-01-01

    This article presents the first version of a permissive graphical patcher (referred to in the text as SCPGP) dedicated to fluid interconnection and control of SuperCollider Synths. With SCPGP, the user programs her/his SynthDefs normally as code in the SuperCollider environment, along with a minimal amount of additional information on these SynthDefs, and programs Patterns according to a simple SuperCollider-compliant syntax.\\ud From the execution of this SuperCollider session, the SCPGP inte...

  5. Accelerator physics issues at the SSC

    International Nuclear Information System (INIS)

    Dugan, G.F.

    1993-05-01

    Realization of the design energy and luminosity goals of the Superconducting Super Collider (SSC) will require proper resolutions of a number of challenging problems in accelerator physics. The status of several salient issues in the design of the SSC will be reviewed and updated in this paper. The emphasis will be on the superconducting accelerators

  6. SSC accelerator availability allocation

    International Nuclear Information System (INIS)

    Dixon, K.T.; Franciscovich, J.

    1991-03-01

    Superconducting Super Collider (SSC) operational availability is an area of major concern, judged by the Central Design Group to present such risk that use of modern engineering tools would be essential to program success. Experience has shown that as accelerator beam availability falls below about 80%, efficiency of physics experiments degrades rapidly due to inability to maintain adequate coincident accelerator and detector operation. For this reason, the SSC availability goal has been set at 80%, even though the Fermi National Accelerator Laboratory accelerator, with a fraction of the SSC's complexity, has only recently approached that level. This paper describes the allocation of the top-level goal to part-level reliability and maintainability requirements, and it gives the results of parameter sensitivity studies designed to help identify the best approach to achieve the needed system availability within funding and schedule constraints. 1 ref., 12 figs., 4 tabs

  7. International collaboration in SSC (or any $4 billion scientific project)

    International Nuclear Information System (INIS)

    Lederman, L.M.

    1988-01-01

    In this paper, the author discusses the superconducting supercollider. This is a project that costs U.S. $4.4 billion. The author spends a short time giving the motivation (which is a scientific motivation) and also giving the idea of how it is possible, with U.S. deficits

  8. Irradiation of fiber optics in the SSC tunnel

    International Nuclear Information System (INIS)

    Dickey, C.E.

    1990-03-01

    The salient question is not whether optical fiber will survive in the Super Conducting Supercollider (SSC) tunnel, but rather how long will it survive. Current estimates indicate that single mode fiber under ideal conditions will have an expected lifetime of at least 25 years. Future development of optical fiber will lead to longer service lifetimes and increased radiation hardness. But conservatively speaking, current production optical fibers can probably not be depended upon for more than 25 years of service even under ideal conditions

  9. The J/psi trigger-tag for study of weak beauty quark decays at the SSC [Superconducting Super Collider

    International Nuclear Information System (INIS)

    Cox, B.; Wagoner, D.E.

    1986-12-01

    The weak decays of beauty hadrons offer a unique opportunity at the SSC to study CP violation in a system other than the neutral kaons and provides a long lever arm for searching for new physics if a strategy can be found for triggering on and identifying these decays. We have determined that the decay sequence B → J/psi + X followed by the decay of the J/psi → μ + μ - presents an opportunity to both trigger on and to unambiguously distinguish b anti b events from the total cross section events

  10. Study of passive and active protection system for the SSC [Superconducting Super Collider] R ampersand D dipole magnet

    International Nuclear Information System (INIS)

    Lopez, G.; Snitchler, G.

    1990-06-01

    A comparative study of Passive versus Active Protection Systems is made using the computer programs SSC*, designed especially for this proposal. These programs track the quench evolution of each conductor independently, the axial quench velocity is given by a modified expression which correctly fits the experimental data, the phenomenological turn-to-turn transversal quench propagation is considered as an input parameter of the programs. The results of the simulations for a 40 mm dipole indicate that a single dipole is widely self-protected, which suggests that a Cold Diode Passive Protection System is a safe method to protect the magnet (no heaters are needed), and also that two or three magnets (Conceptual Design) will be a safe Active Protection System is the heater-time-delay to cause other quenching is sufficiently brief (τ h < 50 ms). Assuming the same turn-to-turn quench propagation for the 50 mm SSC R ampersand D Dipole Magnet, the predictions for this magnet will have much lower axial quench velocity and the above results will be still valid for this new magnet. 10 refs., 30 figs

  11. H/sup /minus// injection into the low-energy booster of the SSC [Superconducting Super Collider

    International Nuclear Information System (INIS)

    Colton, E.P.; Thiessen, H.A.

    1989-01-01

    Protons are accumulated into the low-energy booster of the SSC by utilizing H/sup /minus// → H + conversion in a 225-μg/cm 2 carbon stripping foil. Synchronous injection is performed for 26 turns into stationary rf buckets, thereby allowing operation with variable bunch spacing. By injecting the beam offset in x and y we obtain the required rms normalized transverse emittance area of 0.75 π mm-mr. Similarly the required rms longitudinal emittance area of 1.75π /times/ 10/sup /minus/3/ eVs is obtained by injecting single linac micropulses, centered at /phi/ = 0, and dp/p = +0.12%, into each 49.9-MHz rf bucket formed with an rf voltage of 350 kV. The transverse space-charge tune shift is /minus/0.17 for 10 10 protons/bunch accumulated at 600 MeV. 1 ref., 5 figs., 1 tab

  12. Neutral technicolor pseudo Goldstone bosons production and QCD [quantum chromodynamics] background at the SSC [Superconducting Super Collider

    International Nuclear Information System (INIS)

    Kuo, Wang-Chuang.

    1990-01-01

    The production of the neutral technicolor pseudo Goldstone bosons, P 0 'and P 8 0 ', at large transverse momentum in pp collisions, pp → g(q)P 0 ' (P 8 0 ')X has been investigated in reactions at a high energy collider such as the SSC. The major two-body and three-body decay modes in tree diagrams are investigated in detail. The t bar t decay channel would dominate both the decays of P 0 ' and P 8 0 ' if it is allowed. Otherwise, gg and 3g will be the dominant decay modes unless the mass of the P 0 ' and P 8 0 ' are below 40 GeV, where b bar b becomes dominant. According to the QCD backgrounds, which we have also investigated in detail in this work, the signal for t bar t is much larger than the background and will be the ideal signal for detecting these bosons. However, in the absence of the t bar t channel, the τ bar τ mode can be used to identify P 0 ' up to m P = 300 GeV in the transverse momentum range P perpendicular approx-lt 100 GeV. Similarly, the b bar b decay mode can serve us a signal to identify P 8 0 ' up to m P = 300 GeV for P perpendicular between 500 and 700 GeV. Our results show that these high transverse momentum production processes are useful for the searching for the P 8 0 ' at the SSC. 63 refs

  13. Neutral technicolor pseudo Goldstone bosons production and QCD (quantum chromodynamics) background at the SSC (Superconducting Super Collider)

    Energy Technology Data Exchange (ETDEWEB)

    Kuo, Wang-Chuang.

    1990-09-21

    The production of the neutral technicolor pseudo Goldstone bosons, P{sup 0}{prime}and P{sub 8}{sup 0}{prime}, at large transverse momentum in pp collisions, pp {yields} g(q)P{sup 0}{prime} (P{sub 8}{sup 0}{prime})X has been investigated in reactions at a high energy collider such as the SSC. The major two-body and three-body decay modes in tree diagrams are investigated in detail. The t{bar t} decay channel would dominate both the decays of P{sup 0}{prime} and P{sub 8}{sup 0}{prime} if it is allowed. Otherwise, gg and 3g will be the dominant decay modes unless the mass of the P{sup 0}{prime} and P{sub 8}{sup 0}{prime} are below 40 GeV, where b{bar b} becomes dominant. According to the QCD backgrounds, which we have also investigated in detail in this work, the signal for t{bar t} is much larger than the background and will be the ideal signal for detecting these bosons. However, in the absence of the t{bar t} channel, the {tau}{bar {tau}} mode can be used to identify P{sup 0}{prime} up to m{sub P} = 300 GeV in the transverse momentum range P{sub {perpendicular}} {approx lt} 100 GeV. Similarly, the b{bar b} decay mode can serve us a signal to identify P{sub 8}{sup 0}{prime} up to m{sub P} = 300 GeV for P{sub {perpendicular}} between 500 and 700 GeV. Our results show that these high transverse momentum production processes are useful for the searching for the P{sub 8}{sup 0}{prime} at the SSC. 63 refs.

  14. Construction of cold mass assembly for full-length dipoles for the SSC [Superconducting Super Collider] accelerator

    International Nuclear Information System (INIS)

    Dahl, P.; Cottingham, J.; Garber, M.

    1986-10-01

    Four of the initial six 17m long demonstration dipole magnets for the proposed Superconducting Super Collider have been constructed, and the first one is now being tested. This paper describes the magnet design and construction of the cold mass assembly. The magnets are cold iron (and cold bore) 1-in-1 dipoles, wound with partially keystoned current density-graded high homogeneity NbTi cable in a two-layer cos θ coil of 40 mm inner diameter. The magnetic length is 16.6 m. The coil is prestressed by 15 mm wide stainless steel collars, and mounted in a circular, split iron yoke of 267 mm outer diameter, supported by a cylindrical yoke (and helium) containment vessel of stainless steel. The magnet bore tube assembly incorporates superconducting sextupole trim coils produced by an industrial, automatic process akin to printed circuit fabrication

  15. Superconducting Super Collider project

    International Nuclear Information System (INIS)

    Perl, M.L.

    1986-04-01

    The scientific need for the Superconducting Super Collider (SSC) is outlined, along with the history of the development of the SSC concept. A brief technical description is given of each of the main points of the SSC conceptual design. The construction cost and construction schedule are discussed, followed by issues associated with the realization of the SSC. 8 refs., 3 figs., 3 tabs

  16. Development of scaling rules for Rutherford type superconducting cables

    International Nuclear Information System (INIS)

    Royet, J.M.; Scanlan, R.M.

    1991-01-01

    During the R and D phase of the Superconducting Supercollider (SSC) program, LBL was responsible for establishing the parameters for cables used in SSC dipole and quadrupole magnets. In addition, LBL has collaborated with Fermi National Accelerator Laboratory on the design and fabrication of a new cable for use in the Low Beta Quadrupoles. As a result of the development work on these and other cables, we have arrived a set of scaling rules which provide guidelines for choosing the parameters for a wide range of superconducting cables. These parameters include strand size, strand number, keystone angle, percent compaction, cable pitch and compacted cable dimensions. In addition, we have defined the tolerance ranges for the key cable manufacturing parameters such as mandrel size and shape, strand tension, and Turkshead temperature control. In this paper, the authors present the results on cables ranging from 8 strands to 36 strands of 0.65mm wire and from 8 strands to 30 strands of 0.8mm wire. The authors use these results to demonstrate the application of the scaling rules for Rutherford-type cable

  17. Development of scaling rules for Rutherford type superconducting cables

    International Nuclear Information System (INIS)

    Royet, J.M.; Scanlan, R.M.

    1990-09-01

    During the R ampersand D phase of the Superconducting Supercollider (SSC) program, LBL was responsible for establishing the parameters for cables used in SSC dipole and quadrupole magnets. In addition, the design and fabrication of a new cable for use in the Low Beta Quadrupoles. As a result of the development work on these and other cables, we have arrived a set of scaling rules which provide guidelines for choosing the parameters for a wide range of superconducting cables. These parameters include strand size, strand number, keystone angle, percent compaction, cable pitch and compacted cable dimensions. In addition, we have defined the tolerance ranges for the key cable manufacturing parameters such as mandrel size and shape, stand tension, and Turkshead temperature control. In this paper, we present the results on cables ranging from 8 strands to 36 strands of 0.65mm wire and from 8 strands to 30 strands of 0.8mm wire. We use these results to demonstrate the application of the scaling rules for Rutherford-type cable

  18. Measurements of ground motion and SSC dipole vibrations

    International Nuclear Information System (INIS)

    Parkhomchuk, V.V.; Shiltsev, V.D.; Weaver, H.J.

    1993-06-01

    The results of seismic ground measurements at the Superconducting Super Collider (SSC) site and investigations of vibrational properties of superconducting dipoles for the SSC are presented. Spectral analysis of the data obtained in the large frequency band from 0.05 Hz to 2000 Hz is done. Resonant behavior and the dipole-to-ground transform ratio are investigated. The influence of measured vibrations on SSC operations is considered

  19. Computing requirements for S.S.C. accelerator design and studies

    International Nuclear Information System (INIS)

    Dragt, A.; Talman, R.; Siemann, R.; Dell, G.F.; Leemann, B.; Leemann, C.; Nauenberg, U.; Peggs, S.; Douglas, D.

    1984-01-01

    We estimate the computational hardware resources that will be required for accelerator physics studies during the design of the Superconducting SuperCollider. It is found that both Class IV and Class VI facilities (1) will be necessary. We describe a user environment for these facilities that is desirable within the context of accelerator studies. An acquisition scenario for these facilities is presented

  20. High P/sub T/ detectors for the SSC

    International Nuclear Information System (INIS)

    Trilling, G.H.

    1987-11-01

    Summarized in this report is some of the work done at the recent Workshop on Experiments, Detectors, and Experimental Areas for the Supercollider held at Berkeley. The major goal was to develop an understanding of what complement of detectors would provide the capability for a well-balanced physics program at the SSC. Unlike earlier studies which had emphasized individual components such as tracking, calorimetry, etc., the intention was to focus on complete detectors. The particular detectors discussed in this paper are: the large solenoid detectors, the compact solenoid detectors, the non-magnetic detectors, the dipole detectors and muon detectors. 10 refs., 6 figs., 2 tabs

  1. US seeks major Japanese role in supercollider

    CERN Multimedia

    Cross, M

    1990-01-01

    Japan is considering an offer to join the team building the SSC in Texas. The USA is hoping to raise 8 billion dollars, approximately a third of the money it needs to build the accelerator (1/2 page).

  2. Superconductivity

    International Nuclear Information System (INIS)

    Taylor, A.W.B.; Noakes, G.R.

    1981-01-01

    This book is an elementray introduction into superconductivity. The topics are the superconducting state, the magnetic properties of superconductors, type I superconductors, type II superconductors and a chapter on the superconductivity theory. (WL)

  3. Superconducting materials and magnets

    International Nuclear Information System (INIS)

    1991-04-01

    The Technical Committee Meeting on Superconducting Materials and Magnets was convened by the IAEA and held by invitation of the Japanese government on September 4-6, 1989 in Tokyo. The meeting was hosted by the National Research Institute for Metals. Topics of the conference related to superconducting magnets and technology with particular application to fusion and the superconducting supercollider. Technology using both high and low-temperature superconductors was discussed. This document is a compendium of the papers presented at the meeting. Refs, figs and tabs

  4. Higher costs confirmed for US supercollider

    CERN Multimedia

    Vaughan, C

    1990-01-01

    American Secratary of Energy, James Watkins told Congress that the SSC will cost at least one to two billion dollars more than its estimated cost. He admitted that the final cost may be so high that the collider is not worth building (3 paragraphs).

  5. Electron beam emittance monitor for the SSC

    International Nuclear Information System (INIS)

    Tsyganov, E.; Meinke, R.; Nexsen, W.; Kauffmann, S.; Zinchenko, A.; Taratin, A.

    1993-05-01

    A nondestructive beam profile monitor for the Superconducting Super Collider (SSC) is presented using as a probe a low-energy electron beam interacting with the proton bunch charge. Results using a full Monte Carlo simulation code look promising for the transverse and longitudinal beam profile measurements

  6. Superconductivity

    CERN Document Server

    Poole, Charles P; Farach, Horacio A

    1995-01-01

    Superconductivity covers the nature of the phenomenon of superconductivity. The book discusses the fundamental principles of superconductivity; the essential features of the superconducting state-the phenomena of zero resistance and perfect diamagnetism; and the properties of the various classes of superconductors, including the organics, the buckministerfullerenes, and the precursors to the cuprates. The text also describes superconductivity from the viewpoint of thermodynamics and provides expressions for the free energy; the Ginzburg-Landau and BCS theories; and the structures of the high

  7. Overview of SSC accelerator requirements

    International Nuclear Information System (INIS)

    Dugan, G.

    1992-03-01

    This paper will present a general overview of the requirements of the Superconducting Super Collider (SSC) accelerators. Each accelerator in the injector chain will be discussed separately, followed by a discussion of the collider itself. In conclusion, the top level requirements of the overall accelerator system will be presented. For each accelerator, the primary operating parameters will be presented in tabular form. A brief narrative discussion of the principal technical features of each machine will be given. Finally, the principal technical design challenges for the machine will be noted, together with the currently planned solution to these challenges

  8. A superconducting supercollider calorimeter photomultiplier tube preamplifier circuit

    Energy Technology Data Exchange (ETDEWEB)

    Panescu, D; Lackey, J; Robl, P; Smith, W H [Wisconsin Univ., Madison, WI (United States). Physics Dept.

    1992-07-15

    This study presents the design of the front end amplifier for a scintillator calorimeter with photomultiplier tube (PMT) readout. The design is based on analytical computations and SPICE simulations, and is checked against tests performed on a prototyped circuit. We were looking to achieve (1) a very low droop within the 4 ns after the integration of the photomultiplier tube (PMT) signal was completed, (2) a very low noise figure for the whole amplifier in a 100 MHz bandwidth, (3) an input impedance optimized for the PMT which is actually used, (4) baseline restoration as quick as possible at the output of the clip amps, (5) no loss of information due to the saturation at intermediary stages (e.g. integrator), and (6) an output driving 100 {Omega} twisted pair cables, or 50 {Omega} coaxial cables, in order to transmit the signal to switched capacitor arrays for analog storage. (orig.).

  9. SSC detector solenoid

    International Nuclear Information System (INIS)

    Fast, R.W.; Grimson, J.H.; Kephart, R.D.; Krebs, H.J.; Stone, M.E.; Theriot, E.D.; Wands, R.H.

    1989-01-01

    A detector utilizing a superconducting solenoid is being discussed for the Superconducting Super Collider (SSC). A useful field volume of 8 m diameter x 16 m length at 1.5-2 T (--1 GJ at 2T) is required. It has been decided that all of the particle physics calorimetry will be inside the bore of the solenoid and that there is no need for the coil and cryostat to be ''thin'' in radiation lengths. An iron yoke will reduce the excitation required and will provide muon identification and a redundant momentum measurement of the muons. The authors have developed a conceptual design to meet these requirements. The magnet will use a copper-stabilized Nb-Ti conductor sized for a cryostable pool boiling heat flux --0.025 W/cm/sup 2/. A thermosiphon from a storage vessel above the cryostat will be used to prevent bubble stagnation in the liquid helium bath. The operating current, current density, coil subdivision and dump resistor have been chosen to guarantee that the coil will be undamaged should a quench occur. The axial electromagnetic force will be reacted by metallic support links; the stainless steel coil case will support the radial force. The 5000 metric tons of calorimetry will be supported from the iron yoke through a trussed cylindrical shell structure separate from the cryostat. The coil and case, radiation shield and stainless vacuum vessel would be fabricated and cryogenically tested as two 8-m sections. These would be lowered into the underground experimental hall and installed into the iron flux return yoke to provide the required 16-m length

  10. Superconductivity

    International Nuclear Information System (INIS)

    Onnes, H.K.

    1988-01-01

    The author traces the development of superconductivity from 1911 to 1986. Some of the areas he explores are the Meissner Effect, theoretical developments, experimental developments, engineering achievements, research in superconducting magnets, and research in superconducting electronics. The article also mentions applications shown to be technically feasible, but not yet commercialized. High-temperature superconductivity may provide enough leverage to bring these applications to the marketplace

  11. Highlights of the SSC Site Development Plan

    International Nuclear Information System (INIS)

    Sanford, J.R.

    1991-10-01

    This paper summarizes highlights of the Site Development Plan for the Superconducting Super Collider Laboratory. The Plan, sometimes called a Master Plan, was prepared by the architectural and engineering firm for the Laboratory: Parsons Brinckerhoff/Morrison Knudsen (PB/MK) working in association with CRSS. Their task was to interpret the SSC project needs in the context of the Ellis County, Texas site. The team effort was under the direction of Lewis May from CRSS, guided by Robert Sims from the SSC Laboratory. Conceptual drawings are presented in this report

  12. Analysis and design of SSC underground structures

    International Nuclear Information System (INIS)

    Clark, G.T.

    1993-01-01

    This paper describes the analysis and design of underground structures for the Superconducting Super Collider (SSC) Project. A brief overview of the SSC Project and the types of underground structures are presented. Engineering properties and non-linear behavior of the geologic materials are reviewed. The three-dimensional sequential finite element rock-structure interaction analysis techniques developed by the author are presented and discussed. Several examples of how the method works, specific advantages, and constraints are presented. Finally, the structural designs that resulted from the sequential interaction analysis are presented

  13. Superconductivity

    International Nuclear Information System (INIS)

    Andersen, N.H.; Mortensen, K.

    1988-12-01

    This report contains lecture notes of the basic lectures presented at the 1st Topsoee Summer School on Superconductivity held at Risoe National Laboratory, June 20-24, 1988. The following lecture notes are included: L.M. Falicov: 'Superconductivity: Phenomenology', A. Bohr and O. Ulfbeck: 'Quantal structure of superconductivity. Gauge angle', G. Aeppli: 'Muons, neutrons and superconductivity', N.F. Pedersen: 'The Josephson junction', C. Michel: 'Physicochemistry of high-T c superconductors', C. Laverick and J.K. Hulm: 'Manufacturing and application of superconducting wires', J. Clarke: 'SQUID concepts and systems'. (orig.) With 10 tabs., 128 figs., 219 refs

  14. Superconductivity

    International Nuclear Information System (INIS)

    Palmieri, V.

    1990-01-01

    This paper reports on superconductivity the absence of electrical resistance has always fascinated the mind of researchers with a promise of applications unachievable by conventional technologies. Since its discovery superconductivity has been posing many questions and challenges to solid state physics, quantum mechanics, chemistry and material science. Simulations arrived to superconductivity from particle physics, astrophysic, electronics, electrical engineering and so on. In seventy-five years the original promises of superconductivity were going to become reality: a microscopical theory gave to superconductivity the cloth of the science and the level of technological advances was getting higher and higher. High field superconducting magnets became commercially available, superconducting electronic devices were invented, high field accelerating gradients were obtained in superconductive cavities and superconducting particle detectors were under study. Other improvements came in a quiet progression when a tornado brought a revolution in the field: new materials had been discovered and superconductivity, from being a phenomenon relegated to the liquid Helium temperatures, became achievable over the liquid Nitrogen temperature. All the physics and the technological implications under superconductivity have to be considered ab initio

  15. Superconductivity

    CERN Document Server

    Thomas, D B

    1974-01-01

    A short general review is presented of the progress made in applied superconductivity as a result of work performed in connection with the high-energy physics program in Europe. The phenomenon of superconductivity and properties of superconductors of Types I and II are outlined. The main body of the paper deals with the development of niobium-titanium superconducting magnets and of radio-frequency superconducting cavities and accelerating structures. Examples of applications in and for high-energy physics experiments are given, including the large superconducting magnet for the Big European Bubble Chamber, prototype synchrotron magnets for the Super Proton Synchrotron, superconducting d.c. beam line magnets, and superconducting RF cavities for use in various laboratories. (0 refs).

  16. Results from heater-induced quenches of a 4.5 m two-in-one superconducting R and D dipole for the SSC

    International Nuclear Information System (INIS)

    Ganetis, G.; Prodell, A.

    1985-01-01

    Quench studies were performed using a 4.5 m long SSC R and D dipole to determine the temperature rise during a quench by measuring the resistance of the conductor cable in the immediate vicinity of the quench. The 2-in-1 magnet was wound with improved ''high homogeneity'' NbTi conductor in a 2-layer cosine theta coil configuration of 3.2 cm inner diameter with each layer powered separately to simulate graded conductor. Twelve pairs of voltage taps were installed at various locations in the coils around one bore of the magnet. ''Spot'' heaters were placed between the voltage taps of 8 of these pairs to initiate magnet quenches. The resistance of the conductor was obtained from observations of the current and voltage during a magnet quench. The temperature of the conductor was then determined by comparing its resistance to an R vs T curve measured independently for the conductor. The quantity ∫I 2 dt is presented as a function of current and location, and the maximum conductor temperature is shown as a function of ∫I 2 dt and location. Measured longitudinal and azimuthal quench propagation velocities are also presented

  17. Superconductivity

    International Nuclear Information System (INIS)

    Kakani, S.L.; Kakani, Shubhra

    2007-01-01

    The monograph provides readable introduction to the basics of superconductivity for beginners and experimentalists. For theorists, the monograph provides nice and brief description of the broad spectrum of experimental properties, theoretical concepts with all details, which theorists should learn, and provides a sound basis for students interested in studying superconducting theory at the microscopic level. Special chapter on the theory of high-temperature superconductivity in cuprates is devoted

  18. Advanced composite materials and processes for the manufacture of SSC (Superconducting Super Collider) and RHIC (Relativistic Heavy Ion Collider) superconducting magnets used at cryogenic temperatures in a high radiation environment

    Energy Technology Data Exchange (ETDEWEB)

    Sondericker, J.H.

    1989-01-01

    Presently, BNL work on superconducting magnets centers mainly on the development of 17 meter length dipoles for the Superconducting Super Collider Project, approved for construction at Waxahatchie, Texas and 9.7 meter dipoles and quadrupoles for the Relativistic Heavy Ion Collider, a BNL project to start construction next year. This paper will discuss the role of composites in the manufacture of magnets, their operational requirements in cryogenic and radiation environments, and the benefits derived from their use. 13 figs.

  19. Advanced composite materials and processes for the manufacture of SSC [Superconducting Super Collider] and RHIC [Relativistic Heavy Ion Collider] superconducting magnets used at cryogenic temperatures in a high radiation environment

    International Nuclear Information System (INIS)

    Sondericker, J.H.

    1989-01-01

    Presently, BNL work on superconducting magnets centers mainly on the development of 17 meter length dipoles for the Superconducting Super Collider Project, approved for construction at Waxahatchie, Texas and 9.7 meter dipoles and quadrupoles for the Relativistic Heavy Ion Collider, a BNL project to start construction next year. This paper will discuss the role of composites in the manufacture of magnets, their operational requirements in cryogenic and radiation environments, and the benefits derived from their use. 13 figs

  20. Thermal optimum analyses and mechanical design of 10-kA, vapor-cooled power leads for SSC superconducting magnet tests at MTL

    International Nuclear Information System (INIS)

    Shu, Q.S.; Demko, J.; Dorman, R.; Finan, D.; Hatfield, D.; Syromyatnikov, I.; Zolotov, A.; Mazur, P.; Peterson, T.

    1992-08-01

    The spiral-fin, 10-kA, helium vapor-cooled power leads have been designed for Superconducting Super Collider superconducting magnet tests at the Magnet Test Laboratory. In order to thermally optimize the parameters of the power leads, the lead diameters-which minimize the Carnot work for several different lengths, two different fin geometries, and two RRR values of the lead materials-were determined. The cryogenic refrigeration and liquefaction loads for supporting the leads have also been calculated. The optimum operational condition with different currents is discussed. An improved mechanical design of the 10-kA power leads was undertaken, with careful consideration of the cryogenic and mechanical performance. In the design, a new thermal barrier device to reduce heat conduction from the vacuum and gas seal area was employed. Therefore, the electric insulation assembly, which isolates the ground potential parts of the lead from the high-power parts, was moved into a warm region in order to prevent vacuum and helium leakage in the 0-ring seals due to transient cold temperature. The instrumentation for testing the power leads is also discussed

  1. Superconductivity

    International Nuclear Information System (INIS)

    Caruana, C.M.

    1988-01-01

    Despite reports of new, high-temperature superconductive materials almost every day, participants at the First Congress on Superconductivity do not anticipate commercial applications with these materials soon. What many do envision is the discovery of superconducting materials that can function at much warmer, perhaps even room temperatures. Others hope superconductivity will usher in a new age of technology as semiconductors and transistors did. This article reviews what the speakers had to say at the four-day congress held in Houston last February. Several speakers voiced concern that the Reagan administration's apparent lack of interest in funding superconductivity research while other countries, notably Japan, continue to pour money into research and development could hamper America's international competitiveness

  2. Probing lepton number violation via Majorana neutrinos at hadron supercolliders

    International Nuclear Information System (INIS)

    Datta, A.; Guchait, M.; Pilaftsis, A.

    1993-10-01

    The possibility of discovering heavy Majorana neutrinos and lepton number violation via the like sign dilepton signal at hadron supercolliders is investigated. The cross-sections for the production of these neutrinos singly as well as in pairs are computed both in three and four generations scenarios within the framework of the gauge group SU(2) L x U(1) Y and the dominant processes are identified. The suppression of the Standard model background by suitable kinematical cuts is also discussed. (author)

  3. New linac technology - for SSC, and beyond

    International Nuclear Information System (INIS)

    Jameson, R.A.

    1983-01-01

    With recent agreement on the high priority of seeking funding for a Superconducting Super Collider (SSC), it is appropriate to consider the injector linac requirements for such a machine. In so doing, the status of established technique and advantages of near-term R and D with relatively clear payoff are established, giving a base line for some speculation about linac possibilities even further in the future

  4. SSC collider dipole magnet end mechanical design

    International Nuclear Information System (INIS)

    Delchamps, S.W.; Bossert, R.C.; Carson, J.; Ewald, K.; Fulton, H.; Kerby, J.; Koska, W.; Strait, J.; Wake, M.; Leung, K.K.

    1991-01-01

    This paper describes the mechanical design of the ends of Superconducting Super Collider dipole magnets to be constructed and tested at Fermilab. Coil end clamps, end yoke configuration, and end plate design are discussed. Loading of the end plate by axial Lorentz forces is discussed. Relevant data from 40 mm and 50 mm aperture model dipole magnets built and tested at Fermilab are presented. In particular, the apparent influence of end clamp design on the quench behavior of model SSC dipoles is described

  5. An application of differential geometry to SSC magnet end winding

    International Nuclear Information System (INIS)

    Cook, J.M.

    1990-04-01

    It is expected that a large fraction of the total cost of the proposed Superconducting Supercollider will be spent on magnets, and, as Leon Lederman has remarked, ''most of the cost of making a magnet is in the ends.'' Among the mechanical problems to be solved there is the construction of an end-configuration for the superconducting cables which will minimize their strain energy. The purpose of this paper is to promote the use of differential geometry in this minimization. The use will be illustrated by a specific application to the winding of dipole ends. The cables are assumed to be clamped so firmly that their strain is not altered by Lorentz stresses. 15 refs

  6. Underground measurements of seismic vibrations at the SSC site

    International Nuclear Information System (INIS)

    Shiltsev, V.D.; Parkhomchuk, V.V.; Weaver, H.J.

    1995-01-01

    The results of underground measurements of seismic vibrations at the tunnel depth of the Superconducting Super Collider (SSC) site are presented. Spectral analysis of the data obtained in the frequency band from 0.05 Hz to 1500 Hz is performed. It is found that amplitudes of ambient ground motion are less than requirements for the Collider, but cultural vibrations are unacceptably large and will cause fast growth of transverse emittance of the SSC beams

  7. A statistical rationale for establishing process quality control limits using fixed sample size, for critical current verification of SSC superconducting wire

    International Nuclear Information System (INIS)

    Pollock, D.A.; Brown, G.; Capone, D.W. II; Christopherson, D.; Seuntjens, J.M.; Woltz, J.

    1992-03-01

    The purpose of this paper is to demonstrate a statistical method for verifying superconducting wire process stability as represented by I c . The paper does not propose changing the I c testing frequency for wire during Phase 1 of the present Vendor Qualification Program. The actual statistical limits demonstrated for one supplier's data are not expected to be suitable for all suppliers. However, the method used to develop the limits and the potential for improved process through their use, may be applied equally. Implementing the demonstrated method implies that the current practice of testing all pieces of wire from each billet, for the purpose of detecting manufacturing process errors (i.e. missing a heat-treatment cycle for a part of the billet, etc.) can be replaced by other less costly process control measures. As used in this paper process control limits for critical current are quantitative indicators of the source manufacturing process uniformity. The limits serve as alarms indicating the need for manufacturing process investigation

  8. Superconductivity

    CERN Document Server

    Ketterson, John B

    2008-01-01

    Conceived as the definitive reference in a classic and important field of modern physics, this extensive and comprehensive handbook systematically reviews the basic physics, theory and recent advances in the field of superconductivity. Leading researchers, including Nobel laureates, describe the state-of-the-art in conventional and unconventional superconductors at a particularly opportune time, as new experimental techniques and field-theoretical methods have emerged. In addition to full-coverage of novel materials and underlying mechanisms, the handbook reflects continued intense research into electron-phone based superconductivity. Considerable attention is devoted to high-Tc superconductivity, novel superconductivity, including triplet pairing in the ruthenates, novel superconductors, such as heavy-Fermion metals and organic materials, and also granular superconductors. What’s more, several contributions address superconductors with impurities and nanostructured superconductors. Important new results on...

  9. SSC seeks aid

    CERN Multimedia

    1990-01-01

    The chairman of the science committee in the US House of representatives will ask Congress to pass a law requiring that at least a quarter of the funds for the SSC come from foreign money (2 paragraphs).

  10. Prospects for SSC physics

    International Nuclear Information System (INIS)

    Paige, F.E.

    1986-03-01

    The SSC is primarily designed to explore the physics of the 1 TeV mass scale. Since new heavy particles will decay either into other new particles or into the quanta of the standard model, the main goal of SSC experiments will be to identify and to measure these quanta well. Progress in simulating events and in understanding the signature and backgrounds for standard-model physics is described. 51 refs

  11. Civil engineering for a Japanese supercollider

    International Nuclear Information System (INIS)

    Takasaki, F.; Watanabe, Y.; Watase, Y.

    1984-01-01

    The civil engineering aspect of the construction of an accelerator complex of a hadron collider with the beam energy larger than 30TeV was studied. The collider will consist of about 10,000 superconducting magnets accommodated in an underground tunnel of diameter as large as 30km. The complex has a booster with a beam energy of one TeV. One of the possible places for the construction of the accelerator complex will be the area of Abukuma district in Fukushima Prefecture. The construction cost of the tunnel was estimated by experts to be about 90 billion yen including the approach roads. This is only three times as much as the cost of the TRISTAN tunnel whose length is about 3km. This cost is consistent with the estimated cost of the LEP tunnel. It was also estimated that the construction can be finished in four years. (Aoki, K.)

  12. Superconductivity

    CERN Document Server

    Poole, Charles P; Creswick, Richard J; Prozorov, Ruslan

    2014-01-01

    Superconductivity, Third Edition is an encyclopedic treatment of all aspects of the subject, from classic materials to fullerenes. Emphasis is on balanced coverage, with a comprehensive reference list and significant graphics from all areas of the published literature. Widely used theoretical approaches are explained in detail. Topics of special interest include high temperature superconductors, spectroscopy, critical states, transport properties, and tunneling. This book covers the whole field of superconductivity from both the theoretical and the experimental point of view. This third edition features extensive revisions throughout, and new chapters on second critical field and iron based superconductors.

  13. Cryosorption pumping of residual gas in the hadron supercolliders

    International Nuclear Information System (INIS)

    Dostovalov, R.V.; Krasnov, A.A.

    2005-01-01

    In the projects of modern hadron supercollider, for example in Large Hadron Collider (LHC), the basic part of vacuum chamber will be placed inside the cryogenic elements. The LHC vacuum chamber will have a beam screen at temperature 5-20 K to protect a cold bore against the synchrotron radiation (SR) secondary electrons and image current power, and to reduce the dynamic pressure in vacuum chamber irradiated with SR. The basic results of complex study of vacuum parameters of beam screen for LHC with perspective carbon based cryosorbers (active charcoal, woven and nonwoven carbon fiber fabric) are presented in this paper [ru

  14. Is transverse feedback necessary for the SSC emittance preservation? (Vibration noise analysis and feedback parameters optimization)

    International Nuclear Information System (INIS)

    Parkhomchuk, V.V.; Shiltsev, V.D.

    1993-06-01

    The paper considers the Superconducting Super Collider (SSC) site ground motion measurements as well as data from accelerators worldwide about noises that worsen beam performance. Unacceptably fast emittance growth due to these noises is predicted for the SSC. A transverse feedback system was found to be the only satisfactory alternative to prevent emittance decay. Optimization of the primary feedback parameters was done

  15. An industrial cabling machine for the SSC

    International Nuclear Information System (INIS)

    Royet, J.; Armer, R.; Hannaford, R.; Scanlan, R.

    1989-02-01

    The SSC project will need the manufacturing of some 25,000 kilometers of keystoned flat cable. The technical specifications of the various cables to be produced are the result of five years of research and development work at LBL. An experimental cable machine was built and run in the laboratory; many improvements were implemented and tested. Semi-industrial production of the various cables was performed, and the resulting cables were used and tested in the one-meter model magnets and 17.5 meter dipole prototypes. From these experiments an industrial cabler specification was generated and used for an international RFQ. The winner of the contract is Dour Metal, a Belgium company that built the first industrial prototype which is now in a production line at New England Electric Wire Company. In this paper we describe the main characteristics of the machine and give the first industrial production results of superconducting keystoned cable for the SSC project. 4 refs

  16. Proceedings of the international workshop on solenoidal detectors for the SSC

    International Nuclear Information System (INIS)

    Abe, Fumio; Hasegawa, Katsuo

    1990-07-01

    This issue is the collection of the papers presented at the International Workshop on solenoidal detectors for the Superconducting Super Collider (SSC). The 48 of the presented papers are indexed individually. (J.P.N.)

  17. Superconductivity

    International Nuclear Information System (INIS)

    Narlikar, A.V.

    1993-01-01

    Amongst the numerous scientific discoveries that the 20th century has to its credit, superconductivity stands out as an exceptional example of having retained its original dynamism and excitement even for more than 80 years after its discovery. It has proved itself to be a rich field by continually offering frontal challenges in both research and applications. Indeed, one finds that a majority of internationally renowned condensed matter theorists, at some point of their career, have found excitement in working in this important area. Superconductivity presents a unique example of having fetched Nobel awards as many as four times to date, and yet, interestingly enough, the field still remains open for new insights and discoveries which could undeniably be of immense technological value. 1 fig

  18. Superconductivity

    International Nuclear Information System (INIS)

    Anon.

    1988-01-01

    This book profiles the research activity of 42 companies in the superconductivity field, worldwide. It forms a unique and comprehensive directory to this emerging technology. For each research site, it details the various projects in progress, analyzes the level of activity, pinpoints applications and R and D areas, reviews strategies and provides complete contact information. It lists key individuals, offers international comparisons of government funding, reviews market forecasts and development timetables and features a bibliography of selected articles on the subject

  19. Superconductivity

    International Nuclear Information System (INIS)

    Buller, L.; Carrillo, F.; Dietert, R.; Kotziapashis, A.

    1989-01-01

    Superconductors are materials which combine the property of zero electric resistance with the capability to exclude any adjacent magnetic field. This leads to many large scale applications such as the much publicized levitating train, generation of magnetic fields in MHD electric generators, and special medical diagnostic equipment. On a smaller-scale, superconductive materials could replace existing resistive connectors and decrease signal delays by reducing the RLC time constants. Thus, a computer could operate at much higher speeds, and consequently at lower power levels which would reduce the need for heat removal and allow closer spacing of circuitry. Although technical advances and proposed applications are constantly being published, it should be recognized that superconductivity is a slowly developing technology. It has taken scientists almost eighty years to learn what they now know about this material and its function. The present paper provides an overview of the historical development of superconductivity and describes some of the potential applications for this new technology as it pertains to the electronics industry

  20. SSC accelerator physics

    International Nuclear Information System (INIS)

    Anon.

    1985-01-01

    Accelerator physicists at LBL began intensive work on the SSC in 1983, in support of the proposed 6.5-T magnet design, which, in turn, became reference design A during the Reference Designs Study. In that same study, LBL physicists formed the core of the accelerator physics group led by Fermilab's Don Edwards. In a period of only a few months, that group established preliminary parameters for a near-optimal design, produced conceptual designs based on three magnet types, addressed all significant beam lifetime and stability issues, and identified areas requiring further R and D. Since the conclusion of the Reference Designs Study, work has focused on the key SSC design issue, namely, single-particle stability in an imperfect magnetic field. At the end of fiscal 1984, much of the LBL accelerator physics group took its place in the SSC Central Design Group, whose headquarters at LBL will be the focus of nationwide SSC R and D efforts over the next several years

  1. SSC design update

    International Nuclear Information System (INIS)

    Syphers, M.J.

    1992-11-01

    Recent developments in the design and construction of the SSC are presented. Topics include status of the 20 TeV Collider rings, including interaction regions, utility regions, and main arcs, plus some remarks on the injector accelerators. Remaining issues facing the design of the colliding beams synchrotron and its injectors are discussed

  2. Calorimetry at the SSC

    International Nuclear Information System (INIS)

    Wigmans, R.

    1988-01-01

    The state of the art, and the present understanding of the basic limitations in hadron calorimetry, are briefly described. The various options for SSC calorimeters are discussed, and the R ampersand D needed for the ones that look most promising is outlined. The most promising candidates are (1) lead/scintillating fibers and (2) lead (or uranium)/TMS (or other warm liquids)

  3. Calorimetry at the SSC

    International Nuclear Information System (INIS)

    Wigmans, R.

    1987-09-01

    The state of the art, and our present understanding of the basic limitations in hadron calorimetry, are briefly described. The various options for SSC calorimeters are discussed, and the R and D needed for the ones that look most promising is outlined. 13 refs.; 8 figs

  4. Plans for industrial production of the SSC magnets

    International Nuclear Information System (INIS)

    Karpenko, V.N.; Rardin, D.C.

    1986-01-01

    The Universities Research Association through its Central Design Group is currently conducting research and development for the Department of Energy on a superconducting super collider (SSC). The proposed SSC is a device in which protons would be accelerated around a ring approximately 50 miles in circumference. The protons would be kept in their path by means of thousands of powerful superconducting magnets. Two such rings of magnets would be housed in a common underground tunnel, allowing groups of protons to be accelerated in opposite directions and collided, in order to study the fundamental nature of matter and energy. The magnet system is a major element of the SSC in terms of technical requirements, quantity of components and cost. In order to meet technical and production requirements imposed by this system early participation of industry is necessary. The program plans were developed with the objective to involve industry in the early stages of research and development of superconducting magnets, leading to cost effective processes of potential mass production of high quality accelerator magnets by industry. While a decision has not been made by the Department of Energy on whether or not to request construction of the SSC project, if such a request is made and the project is authorized and funded, it would lead to industrial manufacture of a large quantity of superconducting magnets

  5. Partial lifetime test of an SSC Collider dipole

    International Nuclear Information System (INIS)

    Wanderer, P.; Anerella, M.; Ganetis, G.

    1993-01-01

    Over a period of ten months, a 15 m-long, 50 mm-aperture superconducting SSC Collider dipole was taken through a series of thermal and power cycles to check for changes in performance. One quench below operating current was experienced during this period. Small changes in the coil preload and certain harmonics were observed

  6. Superconductivity

    International Nuclear Information System (INIS)

    2007-01-01

    During 2007, a large amount of the work was centred on the ITER project and related tasks. The activities based on low-temperature superconducting (LTS) materials included the manufacture and qualification of ITER full-size conductors under relevant operating conditions, the design of conductors and magnets for the JT-60SA tokamak and the manufacture of the conductors for the European dipole facility. A preliminary study was also performed to develop a new test facility at ENEA in order to test long-length ITER or DEMO full-size conductors. Several studies on different superconducting materials were also started to create a more complete database of superconductor properties, and also for use in magnet design. In this context, an extensive measurement campaign on transport and magnetic properties was carried out on commercially available NbTi strands. Work was started on characterising MgB 2 wire and bulk samples to optimise their performance. In addition, an intense experimental study was started to clarify the effect of mechanical loads on the transport properties of multi-filamentary Nb 3 Sn strands with twisted or untwisted superconducting filaments. The experimental activity on high-temperature superconducting (HTS) materials was mainly focussed on the development and characterisation of YBa 2 Cu 3 O 7-X (YBCO) based coated conductors. Several characteristics regarding YBCO deposition, current transport performance and tape manufacture were investigated. In the framework of chemical approaches for YBCO film growth, a new method, developed in collaboration with the Technical University of Cluj-Napoca (TUCN), Romania, was studied to obtain YBCO film via chemical solution deposition, which modifies the well-assessed metallic organic deposition trifluoroacetate (MOD-TFA) approach. The results are promising in terms of critical current and film thickness values. YBCO properties in films with artificially added pinning sites were characterised in collaboration with

  7. SSC collider dipole magnet end mechanical design

    International Nuclear Information System (INIS)

    Delchamps, S.W.; Bossert, R.C.; Carson, J.; Ewald, K.; Fulton, H.; Kerby, J.; Koska, W.; Strait, J.; Wake, S.M.; Leung, K.K.

    1991-05-01

    This paper describes the mechanical design of the ends of Superconducting Super Collider dipole magnets to be constructed and tested at Fermilab. Coil end clamps, end yoke configuration, and end plate design are discussed. Loading of the end plate by axial Lorentz forces is discussed. Relevant data from 40 mm and 50 mm aperture model dipole magnets built and tested at Fermilab are presented. In particular, the apparent influence of end clamp design on the quench behavior of model SSC dipoles is described. 8 refs., 3 figs

  8. Software methodologies for the SSC

    International Nuclear Information System (INIS)

    Loken, S.C.

    1990-01-01

    This report describes some of the considerations that will determine how the author developed software for the SSC. He begins with a review of the general computing problem for SSC experiments and recent experiences in software engineering for the present generation of experiments. This leads to a discussion of the software technologies that will be critical for the SSC experiments. He describes the emerging software standards and commercial products that may be useful in addressing the SSC needs. He concludes with some comments on how collaborations and the SSC Lab should approach the software development issue

  9. SSC Cryogenic System

    International Nuclear Information System (INIS)

    Brown, D.P.; Louttit, R.I.; Rode, C.; VanderArend, P.C.

    1985-01-01

    The design of the 4.5 K primary cooling system and higher temperature shield cooling systems for the SSC are described. Typical flow diagrams for the magnet piping systems are presented. Estimated heat loads are given. The systems have been designed to accomodate the great distances, 90 km and up, over which the load will be distributed. Provision has been made for cooldown, warmup, quench recovery and magnet replacement, as well as for steady-state operation

  10. SSC kicker impedances

    International Nuclear Information System (INIS)

    Colton, E.P.; Wang, T.F.

    1985-01-01

    The longitudinal and transverse complex impedances Z/sub l//n and Z/sub t/, respectively, have been calculated for both the SSC injection and abort kickers. The calculations assumed that no attempt was made to shield the beam from the kickers. We took the injection and abort kickers to be as specified. The injection kickers were ferrite with a single-turn design, and the abort kickers were of a ''window-frame design'' with tape wound cores

  11. Magnetic field measurements of 1.5 meter model SSC collider dipole magnets at Fermilab

    International Nuclear Information System (INIS)

    Lamm, M.J.; Bleadon, M.; Coulter, K.J.; Delchamps, S.; Hanft, R.; Jaffery, T.S.; Kinney, W.; Koska, W.; Ozelis, J.P.; Strait, J.; Wake, M.; DiMarco, J.

    1991-09-01

    Magnetic field measurements have been performed at Fermilab on 1.5 m magnetic length model dipoles for the Superconducting Supercollider. Harmonic measurements are recorded at room temperature before and after the collared coil is assembled into the yoke and at liquid helium temperature. Measurements are made as a function of longitudinal position and excitation current. High field data are compared with room temperature measurements of both the collared coil and the completed yoked magnet and with the predicted fields for both the body of the magnet and the coil ends

  12. New concepts in microwave sources for e-e+ supercolliders

    International Nuclear Information System (INIS)

    Granatstein, V.L.; McAdoo, J.H.; Striffler, C.D.; Lawson, W.; Latham, P.E.; Reiser, M.

    1986-01-01

    The realization of e - e + supercolliders will require advances in tehnology including the development of x-band microwave amplifiers with pulse energy > 60 J. Candidate microwave amplifiers include klystrons, lasertrons, free electron lasers (FEL's), and gyrotrons; gyrotron amplifiers employing a multicavity gyroklystron configuration appear advantageous at λ ≅ 3 cm. Measurements on a 50 kW, 1 μs gyroklystron show phase jitter 0 indicating compatibility of this type of amplifier with collider requirements. The University of Maryland is currently developing an x-band, TE 0 01 mode gyroklystron driven by 500 keV, 160 A, 2 μs electron beam pulses; combining this tube with a TE 0 01 binary pulse compression circuit under development at SLAC could produce 475 MW, 120 ns microwave pulses which imply the feasibility of achieving linac accelerating fields in the range 100-200 MV/m

  13. Relational databases for SSC design and control

    International Nuclear Information System (INIS)

    Barr, E.; Peggs, S.; Saltmarsh, C.

    1989-01-01

    Most people agree that a database is A Good Thing, but there is much confusion in the jargon used, and in what jobs a database management system and its peripheral software can and cannot do. During the life cycle of an enormous project like the SSC, from conceptual and theoretical design, through research and development, to construction, commissioning and operation, an enormous amount of data will be generated. Some of these data, originating in the early parts of the project, will be needed during commissioning or operation, many years in the future. Two of these pressing data management needs-from the magnet research and industrialization programs and the lattice design-have prompted work on understanding and adapting commercial database practices for scientific projects. Modern relational database management systems (rDBMS's) cope naturally with a large proportion of the requirements of data structures, like the SSC database structure built for the superconduction cable supplies, uses, and properties. This application is similar to the commercial applications for which these database systems were developed. The SSC application has further requirements not immediately satisfied by the commercial systems. These derive from the diversity of the data structures to be managed, the changing emphases and uses during the project lifetime, and the large amount of scientific data processing to be expected. 4 refs., 5 figs

  14. Calorimetry for the SSC

    Energy Technology Data Exchange (ETDEWEB)

    Gordon, H.A.; Grannis, P.D.

    1984-01-01

    The activities related to calorimetry at Snowmass took place in three main areas. These were: (1) The performance criteria for SSC calorimetry, including the requirements on hermeticity, shower containment, segmentation and time resolution. The use of calorimetric means of particle identification was studied. (2) The study of triggering methods using calorimeter energy, angle and timing information. (3) A review of a wide variety of calorimeter materials for absorber and sampling, as well as several means of obtaining the readout of the energy deposits. 48 references, 10 figures, 1 table.

  15. Calorimetry for the SSC

    International Nuclear Information System (INIS)

    Gordon, H.A.; Grannis, P.D.

    1984-01-01

    The activities related to calorimetry at Snowmass took place in three main areas. These were: (1) The performance criteria for SSC calorimetry, including the requirements on hermeticity, shower containment, segmentation and time resolution. The use of calorimetric means of particle identification was studied. (2) The study of triggering methods using calorimeter energy, angle and timing information. (3) A review of a wide variety of calorimeter materials for absorber and sampling, as well as several means of obtaining the readout of the energy deposits. 48 references, 10 figures, 1 table

  16. WLWL scattering at the SSC

    International Nuclear Information System (INIS)

    Bagger, J.; Valencia, G.

    1990-01-01

    We use higher-order chiral Lagrangians to study W L W L scattering at the SSC. We analyze a model that is consistent with crossing, unitarity and chiral symmetry, with no resonant behavior at SSC energies. The only signal is a slightly enhanced rate for W L W L scattering. Our results indicate the level of sensitivity that must be reached before the SSC can be assured of discovering the mechanism for electroweak symmetry breaking. 19 refs., 4 figs., 2 tabs

  17. Chiral Lagrangians and the SSC

    International Nuclear Information System (INIS)

    Dawson, S.

    1991-09-01

    In the event that the SSC does not observe any resonances such as a Higgs boson or a techni-rho meson, we would like to know if the SSC can still discover something about the nature of the electroweak symmetry breaking. We will use chiral Lagrangian techniques to address this question and analyze their utility for studying events containing W and Z gauge bosons at the SSC. 20 refs., 4 figs

  18. Superconductivity

    Energy Technology Data Exchange (ETDEWEB)

    Batistoni, Paola; De Marco, Francesco; Pieroni, Leonardo [ed.

    2005-07-01

    Research on superconductivity at ENEA is mainly devoted to projects related to the ITER magnet system. In this framework, ENEA has been strongly involved in the design, manufacturing and test campaigns of the ITER toroidal field model coil (TFMC), which reached a world record in operating current (up to 80 kA). Further to this result, the activities in 2004 were devoted to optimising the ITER conductor performance. ENEA participated in the tasks launched by EFDA to define and produce industrial-scale advanced Nb3Sn strand to be used in manufacturing the ITER high-field central solenoid (CS) and toroidal field (TF) magnets. As well as contributing to the design of the new strand and the final conductor layout, ENEA will also perform characterisation tests, addressing in particular the influence of mechanical stress on the Nb3Sn performance. As a member of the international ITER-magnet testing group, ENEA plays a central role in the measurement campaigns and data analyses for each ITER-related conductor and coil. The next phase in the R and D of the ITER magnets will be their mechanical characterisation in order to define the fabrication route of the coils and structures. During 2004 the cryogenic measurement campaign on the Large Hadron Collider (LHC) by-pass diode stacks was completed. As the diode-test activity was the only LHC contract to be finished on schedule, the 'Centre Europeenne pour la Recherche Nucleaire' (CERN) asked ENEA to participate in an international tender for the cold check of the current leads for the LHC magnets. The contract was obtained, and during 2004, the experimental setup was designed and realised and the data acquisition system was developed. The measurement campaign was successfully started at the end of 2004 and will be completed in 2006.

  19. Preliminary design implications of SSC fixed-target operation

    International Nuclear Information System (INIS)

    Zisman, M.S.

    1984-06-01

    This paper covers some of the accelerator physics issues relevant to a possible fixed-target operating mode for the Superconducting Super Collider (SSC). In the brief time available, no attempt has been made to design this capability into the SSC. Rather, I have tried to evaluate what the performance of such a machine might be, and to indicate the hardware implications and extraction considerations that would be part of an actual design study. Where appropriate, parameters and properties of the present LBL design for the SSC have been used; these should be taken as being representative of the general class of small-aperture, high-field colliders being considered by the accelerator physics community. Thus, the numerical examples given here must ultimately be reexamined in light of the actual parameters of the particular accelerator being considered

  20. The SSC dipole: Its conceptual origin and early design history

    International Nuclear Information System (INIS)

    Dahl, P.F.

    1990-06-01

    The magnet system for the Superconducting Super Collider will likely remain the most ambitious -- and challenging -- application of superconducting technology for the foreseeable future. The centerpiece of the system is the behemoth collider dipole magnet. Its design, still evolving in its detailed features, dates from the mid-1980's when it emerged as the winner in an early technical showdown that occupied the fledgling SSC project. However, some of its gross features can be traced back to three path-breaking superconducting accelerator initiatives under way a decade earlier -- on the East Coast, on the West Coast, and in the Midwest. Other features have a still earlier legacy. In the present report we chronicle the origins and chief milestones in the development of certain SSC dipole design concepts. Unfortunately, the chronicle must remain incomplete, with the design not yet frozen as we go to press and still subject to important modifications as the SSC Laboratory settles in near its future home in Ellis County, Texas, hard on the heels of a wide-ranging design review in the closing days of the SSC Central Design Group in (CDG) Berkeley. Be that as it may, in what follows we concentrate on the early years in an attempt to recapitulate the birth of the dipole, taking as our point of departure the SSC Reference Designs Study (RDS) of 1984. In Section 3 we touch on the background for the various RDS options, including ISABELLE/CBA and the Tevatron. In Section 4 the narrative focuses on the two final protagonists, a high-field cosine theta (cos θ) magnet and a low-field superferric magnet. Section 5 recounts the circumstances surrounding the selection of a particular magnet ''style'' for further development, and the ups and downs of the first model magnets. We conclude with a smattering of progress highlights in refining the design during the final push under the reign of the CDG

  1. High Filed Magnets: Niobium-titanium and beyond

    Energy Technology Data Exchange (ETDEWEB)

    Waloschek, Pedro

    1990-09-15

    To guide proton beams at tomorrow's higher energies - for the LHC project in CERN's existing LEP tunnel, and for the US Superconducting Supercollider (SSC) construction project - accelerator physicists are pushing for more powerful magnets.

  2. Cooldown and warmup computer simulations of the SSC ring

    International Nuclear Information System (INIS)

    Carcagno, R.H.; Schiesser, W.E.; Yuecel, A.

    1991-06-01

    The Superconducting Super Collider (SSC) consists of two stacked rings of superconducting magnets; each ring is about 86 km in circumference. The total mass to be cooled to liquid helium temperature amounts to about 1 x 10 8 kg, and the total helium inventory under nominal operating conditions (4.15 K and 4 atm) is about 2.8 x 10 5 kg. The cooldown and warmup process of a long string of magnets has to be well understood in order to design a cryogenic system that can satisfy the requirements of helium inventory handling, magnet temperature gradients, and process time for the different cooldown and warmup scenarios being planned for the SSC. A system that can be convincingly simulated can be understood, controlled, operated and improved in a systematic way. In this paper, we introduce two numerical models, a lumped model and a distributed model, for cooldown and warmup of the SSC ring, and present simulation results for an SSC string (4320 m long, or 1/20th of the full ring circumference). The models cover the temperature range between room and liquid helium temperature; the distributed model includes radial temperature distribution in the cold mass. Low temperature range simulations are particularly important to study inventory handling strategies because of the relationship between rapid changes in density and the system mass flow rate. 9 refs., 9 figs

  3. Electrical performance characteristics of the SSC Accelerator System String Test

    International Nuclear Information System (INIS)

    Robinson, W.; Burgett, W.; Dombeck, T.; Gannon, J.; Kraushaar, P.; McInturff, A.; Savord, T.; Tool, G.

    1993-05-01

    The string test facility was constructed to provide a development test bed for the arc regions of the Superconducting Super Collider (SSC). Significant effort has been devoted to the development and testing of superconducting magnets, spools, and accelerator control systems required for the SSC. The string test facility provides the necessary environment required to evaluate the operational performance of these components as they are configured as an accelerator lens in the collider. This discussion will review the results of high current testing of the string conducted to evaluate magnet element uniformity and compatibility, the splice resistance used to connect the magnets, and system response to various quench conditions. Performance results of the spools, energy bypass systems, energy dump, and the power supply system are also discussed

  4. Electrical performance characteristics of the SSC Accelerator System String Test

    International Nuclear Information System (INIS)

    Robinson, W.; Burgett, W.; Dombeck, T.; Gannon, J.; Kraushaar, P.; McInturff, A.; Savord, T.; Tool, G.

    1993-01-01

    The string test facility was constructed to provide a development test bed for the arc regions of the Superconducting Super Collider (SSC). Significant effort has been devoted to the development and testing of superconducting magnets, spools, and accelerator control systems required for the SSC. The string test facility provides the necessary environment required to evaluate the operational performance of these components as they are configured as an accelerator lens in the collider. This discussion will review the results of high current testing of the string conducted to evaluate magnet element uniformity and compatibility, the splice resistance used to connect the magnets, and system response to various quench conditions. Performance results of the spools, energy bypass systems, energy dump, and the power supply system are also discussed

  5. A parallel non-neural trigger tracker for the SSC

    International Nuclear Information System (INIS)

    Farber, R.M.; Kennison, W.; Lapedes, A.S.

    1991-01-01

    The Superconducting Super Collider (SSC) is a major project promising to open the vistas of very high particle physics. When the SSC is in operation, data will be produced at a staggering rate. Current estimates place the raw data coming our of the proposed silicon detector system at 2.5 x 10 16 bits/second. Clearly, storing all events for later off-line processing is totally impracticable. A hierarchy of triggers, firing only on events meeting increasingly specific criteria, are planned to cull interesting events from the flood of information. Each event consists of a sequence of isolated ''hits'', caused by particles hitting various parts of the detector. Collating these hits into the tracks of the approximately 500 particles/event, and then quickly deciding which events meet the criteria for later processing, is essential if the SSC is to produce usable information. This paper addresses the need for real-time triggering and track reconstruction. A benchmarked and buildable algorithm, operable at the required data rates, is described. The use of neural nets, suggested by other researchers, is specifically avoided as unnecessary and impractical. Instead, a parallel algorithm, and associated hardware architecture using only conventional technology, is presented. The algorithm has been tested on fully scaled up, extensively detailed, simulated SSC events, with extremely encouraging results. Preliminary hardware analysis indicate that the trigger/tracker may be built within proposed SSC budget guidelines. 7 refs., 4 figs

  6. Real time control of the SSC string magnets

    International Nuclear Information System (INIS)

    Calvo, O.; Flora, R.; MacPherson, M.

    1987-01-01

    The system described in this paper, called SECAR, was designed to control the excitation of a test string of magnets for the proposed Superconducting Super Collider (SSC) and will be used to upgrade the present Tevatron Excitation, Control and Regulation (TECAR) hardware and software. It resides in a VME orate and is controlled by a 68020/68881 based CPU running the application software under a real time operating system named VRTX

  7. Radiation effects at the SSC

    Energy Technology Data Exchange (ETDEWEB)

    Gilchriese, M.G.D. [ed.] [Superconducting Super Collider Lab., Dallas, TX (United States)

    1988-06-01

    This report contains a preliminary study of the effects of the radiation levels expected at the SSC on potential detector components and a subset of materials to be used in the SSC accelerators. The report does not contain a discussion of radiation damage to electronics components that may be used at the SSC. We have investigated many of the effects of radiation on silicon detectors, on wire chambers, on scintillating materials and the associated readout, on optical fibers for data transmission and on structural or other materials to be used in detector or accelerator components. In the SSC accelerator complex, in particular the storage rings, radiation damage will not present significant problems different than those now faced by existing high energy accelerators. We find that the effects of radiation damage on SSC detector components will be significant at the design luminosity of the ssc and will limit, or determine, many of the options for different detector components. In this regard the reader should keep in mind that, in the absence of a specific detector design, it is not possible to form definitive conclusions regarding the viability of the detector components. Since the radiation levels in experiments at the SSC will depend on the geometry and composition of the apparatus, simple yes /no generalizations about the feasibility of a detector component are not possible.

  8. SSC education: Science to capture the imagination

    International Nuclear Information System (INIS)

    Gadsden, T.; Kivlighn, S.

    1992-01-01

    To the great majority of Americans, science is merely a collection of facts and theories that should (for unknown reasons) be memorized and perhaps even understood in order for one to function as a responsible citizen. Few see science as a way of thinking and questioning and as an approach to learning the secrets of our world. In addition, most children and many adults have a stereotypical view of scientists as studious men in lab coats who spend all their time working alone in dark and smelly chemical or biological laboratories. The Superconducting Super Collider (SSC) totally contradicts such a perception. This great instrument is being created by thousands of scientists, engineers, business people, technicians, administrators, and others, from dozens of nations, working together to realize a shared vision to seek answers to shared questions. The SSCL also provides an opportunity to change the mistaken impressions about science and scientists that have resulted in fewer students pursuing careers in fields related to science. In addition, it will serve as a catalyst to help people understand the roles that scientific thought and inquiry can play in bettering their lives and the lives of their offspring. Recognizing this problem in our society, the creators of the SSC Laboratory made a commitment to use the SSC to improve science education. Consequently, in addition to building the world's premier high-energy physics laboratory, the SSCL has a second goal: creation of a major national and international educational resource. To achieve the latter goal, the Education Office of the SSCL is charged with using the resources of the Laboratory, both during construction and during operation, to improve education in science and mathematics at all levels (prekindergarten through post-doctorate) and for all components of our society (including the general public), in the United States and around the world

  9. SSC lattice database and graphical interface

    International Nuclear Information System (INIS)

    Trahern, C.G.; Zhou, J.

    1991-11-01

    When completed the Superconducting Super Collider will be the world's largest accelerator complex. In order to build this system on schedule, the use of database technologies will be essential. In this paper we discuss one of the database efforts underway at the SSC, the lattice database. The SSC lattice database provides a centralized source for the design of each major component of the accelerator complex. This includes the two collider rings, the High Energy Booster, Medium Energy Booster, Low Energy Booster, and the LINAC as well as transfer and test beam lines. These designs have been created using a menagerie of programs such as SYNCH, DIMAD, MAD, TRANSPORT, MAGIC, TRACE3D AND TEAPOT. However, once a design has been completed, it is entered into a uniform database schema in the database system. In this paper we discuss the reasons for creating the lattice database and its implementation via the commercial database system SYBASE. Each lattice in the lattice database is composed of a set of tables whose data structure can describe any of the SSC accelerator lattices. In order to allow the user community access to the databases, a programmatic interface known as dbsf (for database to several formats) has been written. Dbsf creates ascii input files appropriate to the above mentioned accelerator design programs. In addition it has a binary dataset output using the Self Describing Standard data discipline provided with the Integrated Scientific Tool Kit software tools. Finally we discuss the graphical interfaces to the lattice database. The primary interface, known as OZ, is a simulation environment as well as a database browser

  10. SSC muon detector group report

    International Nuclear Information System (INIS)

    Carlsmith, D.; Groom, D.; Hedin, D.; Kirk, T.; Ohsugi, T.; Reeder, D.; Rosner, J.; Wojcicki, S.

    1986-01-01

    We report here on results from the Muon Detector Group which met to discuss aspects of muon detection for the reference 4π detector models put forward for evaluation at the Snowmass 1986 Summer Study. We report on: suitable overall detector geometry; muon energy loss mechanisms; muon orbit determination; muon momentum and angle measurement resolution; raw muon rates and trigger concepts; plus we identify SSC physics for which muon detection will play a significant role. We conclude that muon detection at SSC energies and luminosities is feasible and will play an important role in the evolution of physics at the SSC

  11. SSC muon detector group report

    Energy Technology Data Exchange (ETDEWEB)

    Carlsmith, D.; Groom, D.; Hedin, D.; Kirk, T.; Ohsugi, T.; Reeder, D.; Rosner, J.; Wojcicki, S.

    1986-01-01

    We report here on results from the Muon Detector Group which met to discuss aspects of muon detection for the reference 4..pi.. detector models put forward for evaluation at the Snowmass 1986 Summer Study. We report on: suitable overall detector geometry; muon energy loss mechanisms; muon orbit determination; muon momentum and angle measurement resolution; raw muon rates and trigger concepts; plus we identify SSC physics for which muon detection will play a significant role. We conclude that muon detection at SSC energies and luminosities is feasible and will play an important role in the evolution of physics at the SSC.

  12. Integrated design of the SSC linac injector

    International Nuclear Information System (INIS)

    Evans, D.; Valiecnti, R.; Wood, F.

    1992-01-01

    The Ion Source, Low Energy Beam Transport (LEBT), and Radio Frequency Quadrupole (RFQ) of the Superconducting Super Collider (SSC) Linac act as a unit (referred to as the Linac Injector), the Ion Source and LEBT being cantilevered off of the RFQ. Immediately adjacent to both ends of the RFQ cavity proper are endwall chambers containing beam instrumentation and independently-operated vacuum isolation valves. The Linac Injector delivers 30 mA of H - beam at 2.5 MeV. This paper describes the design constraints imposed on the endwalls, aspects of the integration of the Ion Source and LEBT including attachment to the RFQ, maintainability and interchangeability of LEBTs, vacuum systems for each component, and the design of necessary support structure. (Author) 2 tab

  13. 84 K nitrogen system for the SSC

    International Nuclear Information System (INIS)

    McAshan, M.; Thirumaleshwar, M.; Abramovich, S.; Ganni, V.; Scheidemantle, A.

    1992-01-01

    The nitrogen system for the Superconducting Super Collider (SSC) is designed to provide the 84 K (nominal) shield refrigeration for the collider rings. Liquid nitrogen is supplied to the collider tunnel from one, two, or more locations on the surface through the service shafts and is distributed along, the 87 km of both rings by the 84 K shield lines. Additional design requirements for the nitrogen distribution system include precooling, fluid supply to the helium plants, supplying makeup liquid nitrogen to the reservoirs located at the entrance of the main shafts, and providing an efficient cooldown means for the cold mass from 300 K to 90 K. The operational modes and possible emergency and maintenance conditions of the collider are taken into account for the nitrogen system design. The status of our work, including design considerations that address thermal aspects (heat load, recooling scheme, etc.) and hydraulic aspects (pressures, elevations, distances, etc.) of the nitrogen system will be discussed

  14. Educational opportunities from the SSC

    International Nuclear Information System (INIS)

    Doddy, G.J.; Rider, A.H.; Halff, A.H.

    1990-01-01

    High energy physics and education are very closely interwoven. Most physics laboratories are located at universities or are operated by consortiums of universities. Fermilab and the SSC are operated by the Universities Research Association, URA, a consortium of 69 major research universities and 3 associate members. Another example of this laboratory and universities relationship is the Continuous Electron Beam Accelerator Facility, CEBAF, which is operated by the Southeastern Universities Research Association, SURA, another consortium of 39 major universities. The education potential inherent in the planning, construction and operation of the SSC is immense. The SSC, as the world's largest scientific instrument and, as the most power accelerator, will have a natural attraction as the preeminent institution in the scientific community. In addition to the primary objective of probing the fundamental composition of matter, the SSC will appear to a broad segment of the population and will create the opportunity for both passive and active educational experiences on the part of staff, students and visitors. On the esoteric level, the SSC will be a magnet for the scientific community and will attract from around the world the finest minds in the field of high energy physics. On the human level, the laboratory will become an integral part of the community and will be an object of great interest to local residents and visitors. The SSC planners should recognize the opportunity to be a contributing institution to both the local and the world community

  15. The SSC dipole: Its conceptual origin and early design history

    International Nuclear Information System (INIS)

    Dahl, P.F.

    1992-05-01

    The magnet system for the Superconducting Super Collider will likely remain the most ambitions-and challenging-application of superconducting technology for the foreseeable future. The centerpiece of the system is the behemoth collider dipole magnet. Its design, still evolving in its detailed features, dates from the mid-1980's when it emerged as the winter in an early technical showdown that occupied the fledgling SSC project. In the present report we chronicle the origins and chief milestones in the development of certain SSC dipole design concepts. Unfortunately, the chronicle must remain incomplete, with the design not yet frozen as we go to press and still subject to important modifications as the SSC Laboratory settles in near its future home in Ellis County, Texas, hard on the heels of a wide-ranging design review in the closing days of the SSC Central Design Group in (CDG) Berkeley. Be that as it may, in what follows we concentrate on the early years in an attempt to recapitulate the birth of the dipole, taking as our point of departure the SSC Reference Designs Study (RDS) of 1984. In Section 3 we touch on the background for the various RDS options, including ISABELLE/CBA and the Tevatron. In Section 4 the narrative focuses on the two final protagonists, a high-field cosine theta (cos θ) magnet and a low-field superferric magnet. Section 5 recounts the circumstances surrounding the selection of a particular magnet ''style'' for further development, and the ups and downs of the first model magnets. We conclude with a smattering of progress highlights in refining the design during the final push under the reign of the CDG. Beyond that, the ongoing chronicle must be left for others to amplify and complete

  16. Superconducting magnets 1992

    International Nuclear Information System (INIS)

    1993-06-01

    This report discusses the following topics on Superconducting Magnets; SSC Magnet Industrialization; Collider Quadrupole Development; A Record-Setting Magnet; D20: The Push Beyond 10T; Nonaccelerator Applications; APC Materials Development; High-T c at Low Temperature; Cable and Cabling-Machine Development; and Analytical Magnet Design

  17. Cooldown of superconducting magnet strings

    International Nuclear Information System (INIS)

    Yuecel, A.; Carcagno, R.H.

    1995-01-01

    A numerical model for the cooldown of the superconducting magnet strings in the Accelerator System String Test (ASST) Facility at the Superconducting Super Collider (SSC) Laboratory is presented. Numerical results are compared with experimental data from the ASST test runs. Agreement between the numerical predictions and experiments is very good over the entire range from room temperature to liquid helium temperatures. The model can be readily adapted to predict the cooldown and warmup behavior of other superconducting magnets or cold masses

  18. Correction of magnetization sextupole and decapole in a 5 centimeter bore SSC dipole using passive superconductor

    International Nuclear Information System (INIS)

    Green, M.A.

    1991-05-01

    Higher multipoles due to magnetization of the superconductor in four and five centimeter bore Superconducting Super Collider (SSC) superconducting dipole magnets have been observed. The use of passive superconductor to correct out the magnetization sextupole has been demonstrated on two dipoles built by the Lawrence Berkeley Laboratory (LBL). This reports shows how passive correction can be applied to the five centimeter SSC dipoles to remove sextupole and decapole caused by magnetization of the dipole superconductor. Two passive superconductor corrector options will be presented. The change in magnetization sextupole and decapole due to flux creep decay of the superconductor during injection can be partially compensated for using the passive superconductor. 9 refs; 5 figs

  19. Forward spectrometers at the SSC

    International Nuclear Information System (INIS)

    Bjorken, J.D.

    1986-01-01

    Most of SSC phase space and a great deal of physics potential is in the forward/backward region (absolute value of theta < 100 mrad). Comprehensive open-geometry spectrometers are feasible and very cost effective. Examples of such devices are sketched. Because such spectrometers are very long and may operate at high β and longer bunch spacing, they impact now on SSC interaction - region design. The data acquisition load is as heavy as for central detectors, although there may be less emphasis on speed and more emphasis on sophisticated parallel and/or distributed processing for event selection, as well as on high-capacity buffering

  20. Design of SSC collider structures

    International Nuclear Information System (INIS)

    Monsees, J.E.

    1994-01-01

    The authors would like to set the record straight. To date, underground construction contracts on the SSC main ring have been bid at a savings of $77 million dollars or 33 percent below the baseline cost estimate. The SSC is the largest single underground project ever built anywhere in the world. When completed it will have approximately 70 miles of tunnels, 60 shafts, two huge underground experiment halls -- each the size of a football stadium -- and numerous other structures, each of which would be considered a major facility on any other project

  1. Simulating supersymmetry at the SSC

    International Nuclear Information System (INIS)

    Barnett, R.M.; Haber, H.E.

    1984-08-01

    Careful study of supersymmetric signatures at the SSC is required in order to distinguish them from Standard Model physics backgrounds. To this end, we have created an efficient, accurate computer program which simulates supersymmetric particle production and decay (or other new particles). We have incorporated the full matrix elements, keeping track of the polarizations of all intermediate states. (At this time hadronization of final-state partons is ignored). Using Monte Carlo techniques this program can generate any desired final-state distribution or individual events for Lego plots. Examples of the results of our study of supersymmetry at SSC are provided

  2. SSC Test Operations Contract Overview

    Science.gov (United States)

    Kleim, Kerry D.

    2010-01-01

    This slide presentation reviews the Test Operations Contract at the Stennis Space Center (SSC). There are views of the test stands layouts, and closer views of the test stands. There are descriptions of the test stand capabilities, some of the other test complexes, the Cryogenic propellant storage facility, the High Pressure Industrial Water (HPIW) facility, and Fluid Component Processing Facility (FCPF).

  3. Ep option at the SSC

    International Nuclear Information System (INIS)

    Prescott, C.Y.

    1984-05-01

    The possibilities for colliding electrons with the 20 TeV proton beams of the SSC are considered. Kinematics of ep colliding beams is reviewed. Energies that may be possible and interesting are suggested, and detector problems associated with the highly imbalanced collisions are briefly considered

  4. Proceedings of the workshop on triggering and data acquisition for experiments at the Supercollider

    Energy Technology Data Exchange (ETDEWEB)

    Donaldson, R. [ed.

    1989-04-01

    This meeting covered the following subjects: triggering requirements for SSC physics; CDF level 3 trigger; D0 trigger design; AMY trigger systems; Zeus calorimeter first level trigger; data acquisition for the Zeus Central Tracking Detector; trigger and data acquisition aspects for SSC tracking; data acquisition systems for the SSC; validating triggers in CDF level 3; optical data transmission at SSC; time measurement system at SSC; SSC/BCD data acquisition system; microprocessors and other processors for triggering and filtering at the SSC; data acquisition, event building, and on-line processing; LAA real-time benchmarks; object-oriented system building at SSC; and software and project management. Selected papers are indexed separately for inclusion in the Energy Science and Technology Database.

  5. Test results of BNL built 40-mm aperture, 17-m-long SSC collider dipole magnets

    International Nuclear Information System (INIS)

    Kuzminski, J.; Bush, T.; Coombes, R.; Devred, A.; DiMarco, J.; Goodzeit, C.; Puglisi, M.; Radusewicz, P.; Sanger, P.; Schermer, R.; Tompkins, J.C.; Wolf, Z.; Yu, Y.; Zheng, H.; Ogitsu, T.; Anerella, M.; Cottingham, J.; Ganetis, G.; Garber, M.; Gosh, A.; Greene, A.; Gupta, R.; Herrera, J.; Kahn, S.; Kelly, E.; Morgan, G.; Muratore, J.; Prodell, A.; Rehak, M.; Rohrer, E.P.; Sampson, W.; Shutt, R.; Thompson, P.; Wanderer, P.; Willen, E.; Bleadon, M.; Hanft, R.; Kuchnir, M.; Mantsch, P.; Mazur, P.O.; Orris, D.; Peterson, T.; Strait, J.; Royet, J.; Scanlan, R.; Taylor, C.

    1991-06-01

    Eleven 17 m long, 40 mm aperture SSC R ampersand D superconducting collider dipole magnets, built at BNL, have been extensively tested at BNL and Fermilab during 1990--91. Quench performance of these magnets and details of their mechanical behavior are presented. 7 refs., 5 figs

  6. Computing for an SSC experiment

    International Nuclear Information System (INIS)

    Gaines, I.

    1993-01-01

    The hardware and software problems for SSC experiments are similar to those faced by present day experiments but larger in scale. In particular, the Solenoidal Detector Collaboration (SDC) anticipates the need for close to 10**6 MIPS of off-line computing and will produce several Petabytes (10**15 bytes) of data per year. Software contributions will be made from large numbers of highly geographically dispersed physicists. Hardware and software architectures to meet these needs have been designed. Providing the requisites amount of computing power and providing tools to allow cooperative software development using extensions of existing techniques look achievable. The major challenges will be to provide efficient methods of accessing and manipulating the enormous quantities of data that will be produced at the SSC, and to enforce the use of software engineering tools that will ensure the open-quotes correctnessclose quotes of experiment critical software

  7. Intrinsic Chevrolets at the SSC

    International Nuclear Information System (INIS)

    Brodsky, S.J.; Collins, J.C.; Ellis, S.D.; Gunion, J.F.; Mueller, A.H.

    1984-01-01

    The possibility of the production at high energy of heavy quarks, supersymmetric particles and other large mass colored systems via the intrinsic twist-six components in the proton wave function is discussed. While the existing data do not rule out the possible relevance of intrinsic charm production at present energies, the extrapolation of such intrinsic contributions to very high masses and energies suggests that they will not play an important role at the SSC

  8. Cabling for an SSC silicon tracking system

    International Nuclear Information System (INIS)

    Ziock, H.; Boissevain, J.; Cooke, B.; Miller, W.

    1990-01-01

    As part of the Superconducting Super Collider Laboratory (SSCL) funded silicon tracking subsystem R ampersand D program, we examine the problems associated with cabling such a system. Different options for the cabling plant are discussed. A silicon microstrip tracking detector for an SSC experiment is an extremely complex system. The system consists of approximately 10 7 detector channels, each of which requires a communication link with the outside world and connections to the detector bias voltage supply, to a DC power supply for the onboard electronics, and to an adjustable discrimination level. The large number of channels and the short time between beam interactions (16 nanoseconds) dictates the need for high speed and large bandwidth communication channels, and a power distribution system that can handle the high current draw of the electronics including the large AC component due to their switching. At the same time the constraints imposed by the physics measurements require that the cable plant have absolutely minimal mass and radiation length. 4 refs., 2 figs

  9. Engineering innovations on the SSC DTL accelerator

    International Nuclear Information System (INIS)

    Rymer, J.P.; Potter, J.M.; Givens, J.; Campbell, B.; Hansborough, L.

    1992-01-01

    The engineering design of the drift-tube linac (DTL) tanks for the Superconducting Super Collider (SSC) linac incorporates numerous innovative features, resulting in a reliable, cost-effective accelerator structure suitable for commercial production. The tank structure includes two integral strong-backs that provide stable mounting surfaces for the drift tubes and ion pumps and add mechanical stiffness. Drift tubes are mounted using AccSys' patented semi-hard socket technique, which includes separate metal seals for rf and vacuum. The socket allows repeatable adjustment of drift-tube location, thus allowing the tank to be fabricated to realistic tolerances. Transverse alignment of the drift tubes will be accomplished using a pulsed taut-wire technique to align the magnetic centers of the permanent magnet quadrupoles. This technique has been improved to allow drift-tube alignment throughout a 6 m long tank. For maximum reliability, the individual drift tubes include water-cooling channels that have no water-to-vacuum joints. Each tank will be driven through a waveguide iris coupler that can be adjusted to optimize the coupling. (Author) 3 refs., 3 figs

  10. GIS/FIS development for the SSC

    International Nuclear Information System (INIS)

    Oslin, A.; Butalla, M.

    1992-03-01

    Throughout all phases of the Superconducting Super Collider Laboratory (SSCL) project life decisions will be made on how to manage complex interactions of components, systems, and people with each other and with their environment at both micro and macro scales. The SSC has a distinct advantage compared to other large projects constructed and operated in the past, for even in the early phases scientists and engineers can use computer technology to provide faster computation and better modeling capability to resolve conflict and to make design, construction, and installation decisions. Computer systems today let us go beyond just making pictures of the components and objects under consideration. Not only can we know what objects look like, but we can visualize what and where they are, how they fit together to make networks, and how the networks relate to other types of objects and networks. Two such computer-based systems that relate object position and attributes to one another are Geographic Information Systems (GIS) and Facility Information Systems (FIS)

  11. Weak interactions at the SSC

    International Nuclear Information System (INIS)

    Chanowitz, M.S.

    1986-03-01

    Prospects for the study of standard model weak interactions at the SSC are reviewed, with emphasis on the unique capability of the SSC to study the mechanism of electroweak symmetry breaking whether the associated new quanta are at the TeV scale or higher. Symmetry breaking by the minimal Higgs mechanism and by related strong interaction dynamical variants is summarized. A set of measurements is outlined that would calibrate the proton structure functions and the backgrounds to new physics. The ability to measure the three weak gauge boson vertex is found to complement LEP II, with measurements extending to larger Q 2 at a comparable statistical level in detectable decays. B factory physics is briefly reviewed as one example of a possible broad program of high statistics studies of sub-TeV scale phenomena. The largest section of the talk is devoted to the possible manifestations of symmetry breaking in the WW and ZZ production cross sections. Some new results are presented bearing on the ability to detect high mass WW and ZZ pairs. The principal conclusion is that although nonstandard model scenarios are typically more forgiving, the capability to study symmetry breaking in the standard model (and in related strong interaction dynamical variants) requires achieving the SSC design goals of √ s,L = 40Tev, 10 33 cm -2 sec -1 . 28 refs., 5 figs

  12. An update on passive correctors for the SSC dipole magnets

    International Nuclear Information System (INIS)

    Green, M.A.

    1991-05-01

    The concept of correction of the magnetization sextupole became a topic of discussion as soon as it was realized that superconductor magnetization could have a serious effect on the SSC beam during injection. Several methods of correction were proposed. These included (1) correction with active bore tube windings like those on the HERA machine which correct out magnetization sextupole and the sextupole due to iron saturation, (2) correction with persistent sextupole windings mounted on the bore tube (3) correction using passive superconductor (4) correction using ferromagnetic material, and (5) correction using oriented magnetized materials. This report deals with the use of passive superconductor to correct the magnetization sextupole. Two basic methods are explored in this report: (1) One can correct the magnetization sextupole by changing the diameter of the superconductor filaments in one or more blocks of the SSC dipole. (2) One can correct the magnetization sextupole and decapole by mounting passive superconducting wires on the inside of the SSC dipole coil bore. In addition, an assessment of the contribution of each conductor in the dipole to the magnetization sextupole and decapole is shown. 38 refs, 25 figs., 15 tabs

  13. Comparisons of processes and performance of SSC-VQP material

    International Nuclear Information System (INIS)

    Seuntjens, J.M.; Clark, F.Y.; Erdmann, M.J.; Coleman, E.S.; Jones, B.A.

    1994-01-01

    The Superconducting Super Collider's (SSC) cable Vendor Qualification Program (VQP) will end in FY 1993. At the time of this writing, all 8 vendors involved in this program have demonstrated capability to fabricate conductor which meets SSC specifications. The magnet vendors have hard choices to make in calendar year 1993 in deciding which cable vendors will make the production cable. It is well accepted that because of requirements of magnet uniformity, that only one vendor will be chosen for dipole Inner cable, one vendor for dipole Outer cable, and one vendor for quadrupole Outer cable. The production quantities are nominally 500, 500, and 200 metric tonnes, respectively. Among the many deciding factors are a technically sound production process, process control, and production quantity capability of each cable vendor. Qualified vendors will have proven their technical process and process control is adequate for production quantities. This paper is part of ongoing effort to provide technical information for the magnet vendor's decision making process. Some of the Phase IB process data is summarized as well as results of a portion of the materials characterization performed at the SSC Laboratory. Key process and final product parameters for each cable vendor are compared without identifying specific vendor's process detail

  14. Comparisons of processes and performance of SSC-VQP material

    International Nuclear Information System (INIS)

    Seuntjens, J.; Clark, F.; Erdmann, M.; Coleman, E.; Jones, B.

    1993-05-01

    The Superconducting Super Collider's (SSC) cable Vendor Qualification Program (VQP) will end in FY 1993. At the time of this writing, all 8 vendors involved in this program have demonstrated capability to fabricate conductor which meets SSC specifications. The magnet vendors have hard choices to make in calendar year 1993 in deciding which cable vendors will make the production cable. It is well accepted that because of requirements of magnet uniformity, that only one vendor will be chosen for dipole Inner cable, one vendor for dipole Outer cable, and one vendor for quadrupole Outer cable. The production quantities are nominally 500, 500, and 200 metric tonnes, respectively. Among the many deciding factors are a technically sound production process, process control, and production quantity capability of each cable vendor. Qualified vendors will have proven their technical process and process control is adequate for production quantities. This paper is part of ongoing effort to provide technical information for the magnet vendor's decision making process. Some of the Phase IB process data is summarized and well as results of a portion of the materials characterization performed at the SSC Laboratory. Key process and final product parameters for each cable vendor are compared without identifying specific vendor's process detail

  15. A GEM of an SSC detector

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    The SSC Laboratory has decided to support the GEM (Gammas, Electrons, and Muons) detector collaboration in the next stage of its work, development of a Technical Design Report. Initial ideas for GEM as the second major SSC detector were aired last year

  16. Cultural connections of the SSC

    International Nuclear Information System (INIS)

    Kirk, T.B.W.

    1984-01-01

    This paper has as its purpose, to consider explicitly and in more than cursory detail, the cultural involvement of a major scientific facility, the SSC, with its public surroundings. At the moment of writing, it is uncertain whether the project will evolve under US-national or under international sponsorship. Since most of the paper's substantive content is invariant with respect to this question (but the means of implementation are not), the author proceeds as though the machine will be US sponsored. This assumption avoids the irritation of having to identify continually the particular methods for implementation of the ideas presented. If the international route is chosen, a second paper could be written to accommodate this outcome. By cultural involvement, the author is principally concerned with the following areas: i) accessibility of the facility to the general public; ii) educational potential at and away from the site; iii) architectural and aesthetic considerations; and iv) formal history of the project

  17. Commissioning plans for SSC linac

    International Nuclear Information System (INIS)

    Hurd, J.W.; Aprile, R.L.; Chang, C.R.; Crist, C.E.; Cutler, R.I.; Funk, L.W.; Guy, F.W.; Leifeste, G.T.; Raparia, D.; Saadatmand, K.; Sethi, R.C.; Swenson, D.A.; Tooker, J.; Yao, C.G.

    1992-01-01

    Presented are the general description of the SSC linac and the plans for commissioning. Sections of the linac are installed, tested, and beam commissioned in a serial approach. A specialized set of diagnostics is used to characterize the beam through each section. In addition to the standard diagnostic set, plans call for the use of a bunch shape monitor and x-ray spectrometer. Streak camera and digital imaging diagnostics will be developed. The commissioning plan is folded into the general linac project schedule to show the relation between delivery, staging, installation, conditioning, and actual commissioning with beam. These plans form the basis for coordination between the various organizations responsible for different elements of the linac including the technical components, infrastructure, and temporary staging and operation facilities. (Author) 2 figs., 17 refs

  18. Random errors in the magnetic field coefficients of superconducting magnets

    International Nuclear Information System (INIS)

    Herrera, J.; Hogue, R.; Prodell, A.; Wanderer, P.; Willen, E.

    1985-01-01

    Random errors in the multipole magnetic coefficients of superconducting magnet have been of continuing interest in accelerator research. The Superconducting Super Collider (SSC) with its small magnetic aperture only emphasizes this aspect of magnet design, construction, and measurement. With this in mind, we present a magnet model which mirrors the structure of a typical superconducting magnet. By taking advantage of the basic symmetries of a dipole magnet, we use this model to fit the measured multipole rms widths. The fit parameters allow us then to predict the values of the rms multipole errors expected for the SSC dipole reference design D, SSC-C5. With the aid of first-order perturbation theory, we then give an estimate of the effect of these random errors on the emittance growth of a proton beam stored in an SSC. 10 refs., 6 figs., 2 tabs

  19. A one-campus SSC

    International Nuclear Information System (INIS)

    Lederman, L.M.; Teng, L.C.

    1987-04-01

    Advantages of the one-campus superconducting super collider with bypass-clustered Interaction Region arrangement are enumerated. Designs for double-bypass arrangements with 4 and 6 interaction points are examined and presented. Compared to the conceptual design given in the Conceptual Design Report, the only drawback identified is the additional dipoles required which amounts to ∼20% for the 6 Interaction Point arrangements and ∼10% for the 4 Interaction Point arrangements

  20. Test of two 1.8 M SSC model magnets with iterated design

    International Nuclear Information System (INIS)

    Wanderer, P.; Cottingham, J.G.; Dahl, P.

    1989-01-01

    We report results from two 1.8 m-long dipoles built as part of the Superconducting Super Collider (SSC) RandD program. These magnets contain design changes made on both the 1.8 m and the full-length 17 m dipoles to improve quench performance, magnetic field uniformity, and manufacturability. The magnets reach 8 T with little training. 10 refs., 5 figs., 1 tab

  1. Physics possibilities at LHC/SSC

    International Nuclear Information System (INIS)

    Hinchliffe, I.

    1991-01-01

    This document reviews some recent work on physics simulations for SSC/LHC. Included are reviews of some of the recent developments in physics simulations for the SSC/LHC and comments upon the requirements that are placed upon detectors by the need to extract specific physics signatures. The material in the various EOI/LOI documents submitted to the SCC Laboratory and the work done at the Aachen LHC workshop are discussed. In the following discussion 1 SSC (LHC) year corresponds to an integrated luminosity of 10 (100) fb -1 . 41 refs., 14 figs

  2. Systems engineering and integrated for the SSC

    International Nuclear Information System (INIS)

    Laintz, D.J.; Crosby, B.; Davis, M.; Eben, D.; Gliozzi, J.; Kientz, E.; Knafelc, J.; Phelps, J.; Rider, M.; Shearer, K.

    1989-01-01

    Experience in high technology projects of scale and scope similar to the SSC, leads the authors to propose utilization of a Systems Engineering and Integration (SE and I) process tailored specifically to the SSC project. They begin by giving an overview of SE and I. This overview includes the purpose, history, definition, and a discussion of when to use it. They then proceeded to give a description of a formalized SE and I process. They discuss tailoring the process to a project and close by recommending an early commitment to an SE and I methodology for the SSC. 2 refs., 2 figs

  3. Signals for supersymmetry at the SSC [Superconducting Super Collider

    International Nuclear Information System (INIS)

    Barnett, R.M.

    1986-11-01

    Progress is reviewed in setting mass limits for supersymmetric particles. Since missing energy is a prime signal for supersymmetry, we have calculated several sources of ''fake'' missing energy in ordinary events. The techniques for finding squark-squark and gluino-gluino production are examined and constrasted for √s = 0.63, 2, and 40 TeV; methods of reducing backgrounds are described. The branching ratios of scalar quarks to the lightest supersymmetric particle are calculated with full gaugino mixing. We have considered signals and backgrounds involving hard photons from photino decay and other sources. The process H → H → Higgsino 0 zino 0 with H → Higgsino 0 → gamma photino and zino 0 → ee photino was examined in detail and found to have few backgrounds, and to provide a means of detecting a heavy Higgs particle. The direct production of charginos and neutralinos was calculated. Gluinos are considered as constituents of the proton

  4. A helium venting model for a SSC half cell

    International Nuclear Information System (INIS)

    Carcagno, R.H.; McAshan, M.S.; Schiesser, W.E.

    1991-01-01

    When a Superconducting Super Collider (SSC) dipole magnet quenches, the quench protection system will intentionally quench other magnets in the half cell. The result is that the stored energy of all of these quenched magnets will be absorbed equally among them. These simultaneous quenches produce heat, which diffuses from the magnet coils to the main helium (He) coolant channels and thereby eventually causes an increase in the He pressure. When the quench is detected, vent valves open to minimize the He pressure increase and thus prevent damage to the magnets. The performance of the He venting system has been modeled and simulated to establish whether the venting will take place as required. The model consists of partial differential equation energy balances written radially for the magnet coils, collar, and yoke; and ordinary differential equations of energy and mass balance written for the He in the magnets and relief header. The basic algorithm is the numerical method of lines, with finite difference approximation of the spatial derivatives, and time integration by LSODES. Simulation results are presented for an SSC half cell of the Accelerator Systems String Test (ASST) facility. The results are also compared with recent string quench measurements performed at the Fermilab String Test Facility

  5. Parallel processing at the SSC: The fact and the fiction

    International Nuclear Information System (INIS)

    Bourianoff, G.; Cole, B.

    1991-10-01

    Accurately modelling the behavior of particles circulating in accelerators is a computationally demanding task. The particle tracking code currently in use at SSC is based upon a ''thin element'' analysis (TEAPOT). In this model each magnet in the lattice is described by a thin element at which the particle experiences an impulsive kick. Each kick requires approximately 200 floating point operations (''FLOP''). For the SSC collider lattice consisting of 10 4 elements, performing a tracking of study for a set of 100 particles for 10 7 turns would require 2 x 10 15 FLOPS. Even on a machine capable of 100 MFLOP/sec (MFLOPS), this would require 2 x 10 7 seconds, and many such runs are necessary. It should be noted that the accuracy with which the kicks are to be calculated is important: the large number of iterations involved will magnify the effects of small errors. The inability of current computational resources to effectively perform the full calculation motivates the migration of this calculation to the most powerful computers available. A survey of the current research into new technologies for superconducting reveals that the supercomputers of the future will be parallel in nature. Further, numerous such machines exist today, and are being used to solve other difficult problems. Thus it seems clear that it is not early to begin developing the capability to develop tracking codes for parallel architectures. This report discusses implementing parallel processing on the SCC

  6. Accelerators and superconductivity: A marriage of convenience

    International Nuclear Information System (INIS)

    Wilson, M.

    1987-01-01

    This lecture deals with the relationship between accelerator technology in high-energy-physics laboratories and the development of superconductors. It concentrates on synchrotron magnets, showing how their special requirements have brought about significant advances in the technology, particularly the development of filamentary superconducting composites. Such developments have made large superconducting accelerators an actuality: the Tevatron in routine operation, the Hadron Electron Ring Accelerator (HERA) under construction, and the Superconducting Super Collider (SSC) and Large Hadron Collider (LHC) at the conceptual design stage. Other applications of superconductivity have also been facilitated - for example medical imaging and small accelerators for industrial and medical use. (orig.)

  7. A medical facility proposal to use the SSC linac

    International Nuclear Information System (INIS)

    Funk, L.W.

    1994-01-01

    A consortium organized by the Texas National Research Laboratory Commission under a Department of Energy grant proposes to build and operate a Regional Medical Technology Center to function as a combined medical radioisotope production complex and proton cancer therapy facility using the Linear Accelerator (Linac) assets of the Superconducting Super Collider (SSC). The radioisotope production complex will serve as a domestic source of radioisotopes critically needed by the U.S. pharmaceutical industry and nuclear medicine facilities throughout North America. Presently, more than 70 percent of radioisotopes used in U.S. nuclear medicine procedures are produced outside the country. The Center's state-of-the-art proton cancer therapy facility will serve the Central United States, providing advanced capabilities and augmenting facilities in California and Massachusetts. Long-term, it is anticipated that the RMTC also will stimulate nuclear medicine research, advance medical diagnostic technologies, and generate new industrial applications for linear accelerator technology

  8. A medical facility proposal to use the SSC linac

    International Nuclear Information System (INIS)

    Funk, L.W.

    1995-01-01

    A consortium organized by the Texas National Research Laboratory Commission (TNRLC) under a Department of Energy (DOE) grant proposes to build and operate a Regional Medical Technology Center (RMTC) to function as a combined medical radioisotope production complex and proton cancer therapy facility using the linear accelerator (linac) assets of the cancelled Superconducting Super Collider (SSC). The radioisotope production complex will serve as a domestic source of radioisotopes critically needed by the U.S. pharmaceutical industry and nuclear medicine facilities throughout North America. Presently, more than 70 percent of radioisotopes used in U.S. nuclear medicine procedures are produced outside the country. The Center's state-of-the-art proton cancer therapy facility will serve the Central United States, providing advanced capabilities and augmenting facilities in California and Massachusetts. Long-term, it is anticipated that the RMTC also will stimulate nuclear medicine research, advance medical diagnostic technologies, and generate new industrial applications of linear accelerator technology. (orig.)

  9. A medical facility proposal to use the SSC linac

    Science.gov (United States)

    Warren Funk, L.

    1995-05-01

    A consortium organized by the Texas National Research Laboratory Commission (TNRLC) under a Department of Energy (DOE) grant proposes to build and operate a Regional Medical Technology Center (RMTC) to function as a combined medical radioisotope production complex and proton cancer therapy facility using the linear accelerator (linac) assets of the cancelled Superconducting Super Collider (SSC). The radioisotope production complex will serve as a domestic source of radioisotopes critically needed by the U.S. pharmaceutical industry and nuclear medicine facilities throughout North America. Presently, more than 70 percent of radioisotopes used in U.S. nuclear medicine procedures are produced outside the country. The Center's state-of-the-art proton cancer therapy facility will serve the Central United States, providing advanced capabilities and augmenting facilities in California and Massachusetts. Long-term, it is anticipated that the RMTC also will stimulate nuclear medicine research, advance medical diagnostic technologies, and generate new industrial applications of linear accelerator technology.

  10. Overview and status of RF systems for the SSC Linac

    International Nuclear Information System (INIS)

    Mynk, J.; Grippe, J.; Cutler, R.I.; Rodriguez, R.

    1993-05-01

    The Superconducting Super Collider (SSC) Linear Accelerator (Linac) produces a 600-MeV, 35-μs, H-beam at a 10-Hz repetition rate. The beam is accelerated by a series of RF cavities. These consist of a Radio Frequency Quadrupole (RFQ), two bunchers, and four Drift Tube Linac (DTL) tanks at 427.617 MHz, and two bunchers, nine side-coupled Linac modules, and an energy compressor at 1282.851 MHz. The RFQ amplifier and the low-frequency buncher cavity amplifiers use gridded tubes, while the other cavities use klystron amplifier systems. The RF control system consists of a reference line and cavity feedback and feedforward loops for each amplifier. The RF amplifier system for each of these accelerator cavities is described, and the current status of each system is presented

  11. Coil and iron design for SSC 50 mm magnet

    International Nuclear Information System (INIS)

    Gupta, R.C.; Kahn, S.A.; Morgan, G.H.

    1990-01-01

    In this paper we present the design of the two dimensional coil and iron cross section, referred to as DSX201/W6733, for the 50 mm aperture dipole magnet being built at the Brookhaven National Laboratory for the Superconducting Super Collider (SSC). The computed values of the allowed field harmonics as a function of current, the quench performance predictions, the stored energy calculations, the effect of random errors on the coil placement and the Lorentz forces on the coil will be presented. The yoke has been optimized to reduce iron saturation effects on the field harmonics. We shall present the summary of this design which will include the expected overall performance of this cross section. 4 refs., 8 figs., 12 tabs

  12. Detector problems at the SSC

    International Nuclear Information System (INIS)

    Wojcicki, S.G.

    1985-02-01

    During the last couple of years there has been considerable concern expressed among the US high energy community as to whether detector limitations would prevent one from being able to fully exploit a luminosity of 10 33 cm -2 sec -1 at a hadron-hadron high energy collider. As a result of these concerns, a considerable amount of work has been done recently in trying to understand the nature of potential difficulties and the required R and D that needs to be performed. A lot of this work has been summarized in the 1984 DPF Summer Study at Snowmass. This paper attempts to review some of these results. This work is limited to the discussion of detector problems associated with the study of high energy hadron-hadron collisions. We shall start with the discussion of the desirable features of the detectors and of the SSC environment in which they will have to work. After a brief discussion of the model 4π detectors, we shall discuss specific detector aspects: lepton identification, tracking, calorimetry and computing and triggering. We shall end with some remarks about possible future course of events. 15 refs., 10 figs

  13. Measuring structure functions at SSC energies

    International Nuclear Information System (INIS)

    Morfin, J.G.; Owens, J.F.

    1985-01-01

    Topics discussed include measuring Λ, tests of QCD using hard scattering processes, and measuring parton distributions. In each case, any opportunities and advantages afforded by the unique features of the SSC are emphasized. The working group on structure functions was charged with investigating two specific questions: (1) How well are the various parton distributions known in the kinematic region relevant to calculations for the SSC. (2) What new information can be learned about parton distributions at the SSC. Especially for this working group, the advantages of having a fixed-target facility at the SSC for the measurement of the parton distributions with multi-TeV leptons, were to be examined. 15 references

  14. Decoupling schemes for the SSC Collider

    International Nuclear Information System (INIS)

    Cai, Y.; Bourianoff, G.; Cole, B.; Meinke, R.; Peterson, J.; Pilat, F.; Stampke, S.; Syphers, M.; Talman, R.

    1993-05-01

    A decoupling system is designed for the SSC Collider. This system can accommodate three decoupling schemes by using 44 skew quadrupoles in the different configurations. Several decoupling schemes are studied and compared in this paper

  15. Physics motivations for SSC/LHC detectors

    International Nuclear Information System (INIS)

    Hinchliffe, I.

    1993-06-01

    In this talk, I review the some of the physics goals and simulation work done in the SSC and LHC experimental proposal. I select the processes that illustrate the strengths and weaknesses the proposed detectors

  16. SSC-K code user's manual

    Energy Technology Data Exchange (ETDEWEB)

    Kwon, Y M; Lee, Y B; Chang, W P; Hahn, D

    2000-07-01

    The Supper System Code of KAERI (SSC-K) is a best-estimate system code for analyzing a variety of off-normal or accidents in the heat transport system of a pool type LMR design. It is being developed at Korea Atomic Energy Research Inititution (KAERI) on the basis of SSC-L, originally developed at BNL to analyze loop-type LMR transients. SSC-K can handle both designs of loop and pool type LMRs. SSC-K contains detailed mechanistic models of transient thermal, hydraulic, neutronic, and mechanical phenomena to describe the response of the reactor core, coolant, fuel elements, and structures to accident conditions. This report provides an overview of recent model developmentsvfor the SSC-K computer code, focusing on phenomenological model descriptions for new thermal, hydraulic, neutronic, and mechnaical modules. A comprehensive description of the models for pool-type reactor is given in Chapters 2 and 3; the steady-state plant characterization, prior to the initiation of transient is described in Chapter 2 and their transient counterparts are discussed in Chapter 3. In Chapter 4, a discussion on the intermediate heat exchanger (IHX) is presented. The IHX model of SSC-K is similar to that used in the SSC-L, except for some changes required for the pool-type configuration of reactor vessel. In Chapter 5, an electromagnetic (EM) pump is modeled as a component. There are two pump choices available in SSC-K; a centrifugal pump which was originally imbedded into the SSC-L, and an EM pump which was introduced for the KALIMER design. In Chapter 6, a model of passive safety decay heat removal system(PSDRS) is discussed, which removes decay heat through the reactor and containment vessel walls to the ambient air heat sink. In Chapter 7, models for various reactivity feedback effects are discussed. Reactivity effects of importance in fast reactor include the Doppler effect, effects of sodium density changes, effects of dimensional changes in core geometry. Finally in Chapter 8

  17. Report of the Department of Energy (DOE) Office of Energy Research Review Committee on the site-specific conceptual design of the Superconducting Super Collider

    International Nuclear Information System (INIS)

    1990-09-01

    After it was established in early 1989, the Superconducting Super Collider Laboratory (SSCL) began to prepare a detailed site-specific SSC conceptual design, including cost and schedule estimates. As detailed in the SSC Site-Specific Conceptual Design Report (SCDR), this design builds upon the design in the March 1986 SSC Conceptual Design Report (CDR) and takes into account characteristics of the SSC site, results of continuing magnet R ampersand D, and advances in accelerator design

  18. Tracking with wire chambers at the SSC

    International Nuclear Information System (INIS)

    Hanson, G.G.; Gundy, M.C.; Palounek, A.P.T.

    1989-07-01

    Limitations placed on wire chambers by radiation damage and rate requirements in the SSC environment are reviewed. Possible conceptual designs for wire chamber tacking systems that meet these requirements are discussed. Computer simulation studies of tracking in such systems are presented. Simulations of events from interesting physics at the SSC, including hits from minimum bias background events, are examined. Results of some preliminary pattern recognition studies are given. 13 refs., 11 fig., 1 tab

  19. Validation of SSC using the FFTF natural-circulation tests

    International Nuclear Information System (INIS)

    Horak, W.C.; Guppy, J.G.; Kennett, R.J.

    1982-01-01

    As part of the Super System Code (SSC) validation program, the 100% power FFTF natural circulation test has been simulated using SSC. A detailed 19 channel, 2 loop model was used in SSC. Comparisons showed SSC calculations to be in good agreement with the Fast Flux Test Facility (FFTF), test data. Simulation of the test was obtained in real time

  20. Nitrogen system for the SSC

    International Nuclear Information System (INIS)

    McAshan, M.; Thirumaleshwar, M.; Abramovich, S.; Ganni, V.

    1992-10-01

    The Superconducting Super Collider consists of two parallel magnet rings, each 87,120 m in circumference, constructed in a tunnel 25 m to 74 m below ground level. They are operated at a controlled low helium temperature in order to maintain the magnet windings in the superconducting state. To obtain this condition, the magnet cryostat is designed with a high-quality insulation obtained by a high vacuum chamber, multilayer insulation, and thermal shields at nominal temperatures of 84 K and 20 K. Thermal radiation and the conduction heat load through the supports are intercepted and absorbed by the 84-K shield. Liquid nitrogen provides the refrigeration for these loads. The 84-K shield is anchored to two 63.5-mm stainless-steel tubes. One of the tubes, the ''liquid line,'' serves as a conduit in the distribution system of liquid nitrogen. The other tube, the ''vapor line,'' is used to collect the nitrogen vapor generated in the cooling process and to supply this vapor to,the helium refrigerators for precooling. The vapor line may also be used as a continuous cooler by injecting controlled amounts of liquid nitrogen. The nitrogen system consists of nitrogen supplies; ten nitrogen dewars for the collider and two for the High Energy Booster located on the ground at the main shaft entrances; liquid and vapor transfer lines through the shaft to connect the surface and the tunnel systems; and transfer lines to bypass warm equipment sections of the collider. The nitrogen system is expected to operate at steady state condition except for cooldown, warmup, and system repair, for which transients are expected. During normal operation and standby modes of the collider, temperature, pressure, and mass flow are expected to be constant in all circuits of the nitrogen system. The conceptual design requirements for various flow schemes and the engineering considerations are presented in this report

  1. Supercollider physics

    International Nuclear Information System (INIS)

    Eichten, E.; Hinchliffe, I.; Lane, K.; Quigg, C.

    1984-01-01

    Eichten et al. summarize the motivation for exploring the 1-TeV ( = 10 12 eV) energy scale in elementary particle interactions and explore the capabilities of proton-(anti)proton colliders with beam energies between 1 and 50 TeV. The authors calculate the production rates and characteristics for a number of conventional processes, and discuss their intrinsic physics interest as well as their role as backgrounds to more exotic phenomena. The authors review the theoretical motivation and expected signatures for several new phenomena which may occur on the 1-TeV scale. Their results provide a reference point for the choice of machine parameters and for experiment design

  2. SSC collider quadrupole cold mass design and development

    International Nuclear Information System (INIS)

    Farrell, R.A.; Murray, F.S.; Jonas, P.A.; Mischler, W.R.; Blecher, L.

    1992-01-01

    Approximately 1,664 focussing and defocussing superconducting quadrupoles are required for the two SSC collider rings. Collider quadruple magnets (CQMS) must satisfy stringent performance, reliability, life and low cost criteria. Performance requirements include field uniformity, training, quench, tracking, thermal cycling and alignment. The CQM cold mass design presented incorporates lessons IGC and Alsthom Intermagnetics S.A. (AISA), our joint venture with GEC-Alsthom, learned in the design, development and manufacture of 500 MRI, 160 high-field custom and 126 HERA quadruple superconducting magnets. This baseline design reflects careful quantitative assessment of coil winding placement and collar material, evaluation of field uniformity and mechanical performance of the magnet coil ends using 3-D modeling and analysis, and considers tolerance and process variability. Selected CQM cold mass design highlights and a proposed prototype development program that allows incorporation of test feedback into the design to minimize risk are detailed in this paper. This information may be helpful to SSCL in the design and development of prototype CQM'S

  3. Technical advisory on SSC site criteria and catalog of site information needs

    Energy Technology Data Exchange (ETDEWEB)

    1985-06-15

    The Superconducting Super Collider, or SSC, is a proposed scientific instrument of the study of the fundamental nature of matter. In the SSC two 20-TeV beams of protons will be accelerated and counter circulate on an approximately circular path. The protons will be made to collide at six locations where detectors can be placed to count and measure the products of the collisions. These collisions, twenty times more energetic than in any existing facility, will enable scientists to probe deeper into the heart of matter in the quest for a deeper understanding of the universal forces of nature. The goal of the SSC project is to create a scientific laboratory in high energy physics whose facilities are unique. Ultimately the success of that laboratory will be measured by its scientific discoveries, measurements, interpretations, and innovations. Toward that end the accelerator-collider must be constructed to high standards at minimum cost and maximum effectiveness. Preparations must be made for future operations and a scientific-technical staff attracted and maintained. The chosen site must accommodate all of these factors. This document summarizes siting criteria for the SSC and enumerates site-specific information important to the evaluation of potential sites. This document is not a call for site proposals but a technical report prepared for the information and use of the Department of Energy (DOE).

  4. A fixed target facility at the SSC

    International Nuclear Information System (INIS)

    Loken, S.; Morfin, J.G.

    1984-01-01

    The question of whether a facility for fixed target physics should be provided at the SSC must be answered before the final technical design of the SSC can be completed, particularly if the eventual form of extraction would influence the magnet design. To this end, an enthusiastic group of experimentalists, theoreticians and accelerator specialists have studied this point. The accelerator physics issues were addressed by a group whose report is contained in these proceedings. The physics addressable by fixed target was considered by many of the Physics area working groups and in particular by the Structure Function Group. This report is the summary of the working group which considered various SSC fixed target experiments and determined which types of beams and detectors would be required

  5. Fixed target facility at the SSC

    Energy Technology Data Exchange (ETDEWEB)

    Loken, S.C.; Morfin, J.G.

    1985-01-01

    The question of whether a facility for fixed target physics should be provided at the SSC must be answered before the final technical design of the SSC can be completed, particularly if the eventual form of extraction would influence the magnet design. To this end, an enthusiastic group of experimentalists, theoreticians and accelerator specialists have studied this point. The accelerator physics issues were addressed by a group led by E. Colton whose report is contained in these proceedings. The physics addressable by fixed target was considered by many of the Physics area working groups and in particular by the Structure Function Group. This report is the summary of the working group which considered various SSC fixed target experiments and determined which types of beams and detectors would be required. 13 references, 5 figures.

  6. Fixed target facility at the SSC

    International Nuclear Information System (INIS)

    Loken, S.C.; Morfin, J.G.

    1985-01-01

    The question of whether a facility for fixed target physics should be provided at the SSC must be answered before the final technical design of the SSC can be completed, particularly if the eventual form of extraction would influence the magnet design. To this end, an enthusiastic group of experimentalists, theoreticians and accelerator specialists have studied this point. The accelerator physics issues were addressed by a group led by E. Colton whose report is contained in these proceedings. The physics addressable by fixed target was considered by many of the Physics area working groups and in particular by the Structure Function Group. This report is the summary of the working group which considered various SSC fixed target experiments and determined which types of beams and detectors would be required. 13 references, 5 figures

  7. First beam extracted from the SSC

    International Nuclear Information System (INIS)

    Anon.

    1986-01-01

    On the 25th July 1986 the first 2,8 μA 66 MeV proton beam was successfully extracted from the separated sector cyclotron (SSC) at the National Accelerator Centre at Faure, South Africa. The beam has now also been transported for the first time down the high-energy beamline up to the last Faraday cup in front of the neutron therapy vault. A brief description of the extraction system of the SSC, consisting of an electrostatic extraction channel and two septum magnets is given

  8. Analytical solutions to SSC coil end design

    International Nuclear Information System (INIS)

    Bossert, R.C.; Brandt, J.S.; Carson, J.A.; Fulton, H.J.; Lee, G.C.; Cook, J.M.

    1989-03-01

    As part of the SCC magnet effort, Fermilab will build and test a series of one meter model SSC magnets. The coils in these magnets will be constructed with several different end configurations. These end designs must satisfy both mechanical and magnetic criteria. Only the mechanical problem will be addressed. Solutions will attempt to minimize stresses and provide internal support for the cable. Different end designs will be compared in an attempt to determine which is most appropriate for the SSC dipole. The mathematics required to create each end configuration will be described. The computer aided design, programming and machine technology needed to make the parts will be reviewed. 2 refs., 10 figs

  9. A data acquisition architecture for the SSC

    International Nuclear Information System (INIS)

    Partridge, R.

    1990-01-01

    An SSC data acquisition architecture applicable to high-p T detectors is described. The architecture is based upon a small set of design principles that were chosen to simplify communication between data acquisition elements while providing the required level of flexibility and performance. The architecture features an integrated system for data collection, event building, and communication with a large processing farm. The interface to the front end electronics system is also discussed. A set of design parameters is given for a data acquisition system that should meet the needs of high-p T detectors at the SSC

  10. Considerations on the design of front-end electronics for silicon calorimetry for the SSC

    International Nuclear Information System (INIS)

    Wintenberg, A.L.; Bauer, M.L.; Britton, C.L.; Kennedy, E.J.; Todd, R.A.; Berridge, S.C.; Bugg, W.M.

    1990-01-01

    Some considerations are described for the design of a silicon-based sampling calorimetry detector for the Superconducting Super Collider (SSC). The use of silicon as the detection medium allows fast, accurate, and fine-grained energy measurements - but for optimal performance, the front-end electronics must be matched to the detector characteristics and have the speed required by the high SSC interaction rates. The relation between the signal-to-noise rtio of the calorimeter electronics and the charge collection time, the preamplifier power dissipation, detector capacitance and leakage, charge gain, and signal shaping and sampling was studied. The electrostatic transformer connection was analyzed and found to be unusable for a tightly arranged calorimeter because of stray capacitance effects. The method of deconvolutional sampling was developed as a means for pileup correction following synchronous sampling and analog storage

  11. Thermal optimization of the helium-cooled power leads for the SSC

    International Nuclear Information System (INIS)

    Demko, J.A.; Schiesser, W.E.; Carcagno, R.; McAshan, M.; McConeghy, R.

    1992-01-01

    The optimum thermal design of the power leads for the Superconducting Super Collider (SSC) will minimize the amount of Carnot work (which is a combination of refrigeration and liquefaction work) required. This optimization can be accomplished by the judicious selection of lead length and diameter. Even though an optimum set of dimensions is found, the final design must satisfy other physical constraints such as maximum allowable heat leak and helium vapor mass flow rate. A set of corresponding lengths and diameters has been determined that meets these requirements for the helium vapor-cooled, spiral-fin power lead design of the SSC. Early efforts by McFee and Mallon investigated optimizing power leads for cryogenic applications with no convection cooling. Later designs utilized the boiled-off helium vapor to cool the lead. One notable design for currents up to several thousand amps is presented by Efferson based on a series of recommendations discussed by Deiness. Buyanov presents many theoretical models and design formulae but does not demonstrate an approach to thermally optimizing the design of a vapor-cooled lead. In this study, a detailed numerical thermal model of a power lead design for the SSC has been developed. It was adapted from the dynamic model developed by Schiesser. This model was used to determine the optimum dimensions that minimize the Carnot refrigeration and liquefaction work due to the leads. Since the SSC leads will be cooled by supercritical helium, the flow of vapor is regulated by a control valve. These leads include a superconducting portion at the cold end. All of the material properties in the model are functions of temperature, and for the helium are functions of pressure and temperature. No pressure drop calculations were performed as part of this analysis. The diameter that minimizes the Carnot work was determined for four different lengths at a design current of 6600 amps

  12. Compensation of coupling in the SSC complex

    International Nuclear Information System (INIS)

    Pilat, F.; Bourianoff, G.

    1991-10-01

    This paper will describe a study of the coupling effects and their compensation by means of local depending techniques for some of the accelerators in the SSC Complex. Results concerning corrections and decoupling for the Low Energy and Medium Energy Boosters will be compared to results obtained for the Collider Ring. Some preliminary experimental data about measurement of coupling quantities will also be presented

  13. Liquid argon calorimetry for the SSC

    International Nuclear Information System (INIS)

    Gordon, H.A.

    1990-01-01

    Liquid argon calorimetry is a mature technique. However, adapting it to the challenging environment of the SSC requires a large amount of R ampersand D. The advantages of the liquid argon approach are summarized and the issues being addressed by the R ampersand D program are described. 18 refs

  14. Heavy particle production at the SSC

    International Nuclear Information System (INIS)

    Brodsky, S.J.; Haber, H.E.; Gunion, J.F.

    1984-03-01

    Predictions for the production of heavy quarks, supersymmetric particles, and other colored systems at high energy due to intrinsic twist-six components in the proton wavefunction are given. We also suggest the possibility of using asymmetric collision energies (e.g., via intersecting rings at the SSC) in order to facilitate the study of forward and diffractive particle production processes. 9 references

  15. Dicty_cDB: SSC474 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available SS (Link to library) SSC474 (Link to dictyBase) - - - Contig-U07719-1 SSC474P (Link... to Original site) SSC474F 368 SSC474Z 238 SSC474P 606 - - Show SSC474 Library SS (Link to library) Clone ID SSC474 (Link to dict...yBase) Atlas ID - NBRP ID - dictyBase ID - Link to Contig Contig-U07719-1 Original site URL http://dict...logy vs DNA Score E Sequences producing significant alignments: (bits) Value N ( AU071762 ) Dictyostelium di...scoideum slug cDNA, clone SSC474. 448 e-121 1 ( AU060185 ) Dictyostelium discoideum slug cDNA, clone SLA535.

  16. Proceedings of the workshop on physics at current accelerators and supercolliders

    International Nuclear Information System (INIS)

    Hewett, J.L.; White, A.R.; Zeppenfeld, D.

    1993-01-01

    This report contains papers from the workshop on SSC physics. The topics of these papers include: electroweak physics; electroweak symmetry breaking; heavy flavors; searches for new phenomena; strong interactions and full acceptance physics; and event simulation. These paper have been cataloged separately on the data base

  17. Proceedings of the workshop on physics at current accelerators and supercolliders

    Energy Technology Data Exchange (ETDEWEB)

    Hewett, J L; White, A R; Zeppenfeld, D [eds.

    1993-06-02

    This report contains papers from the workshop on SSC physics. The topics of these papers include: electroweak physics; electroweak symmetry breaking; heavy flavors; searches for new phenomena; strong interactions and full acceptance physics; and event simulation. These paper have been cataloged separately on the data base.

  18. SSC beam dynamics scaled to the Eloisatron

    International Nuclear Information System (INIS)

    Ritson, D.

    1992-03-01

    As crosssections drop as E -2 a desirable target for a 100 TeV the Eloisatron would be to achieve luminosities ∼1.10 35 cm 2 /sec. To understand the impact of such an objective we have compared parameters for the SSC and Eloisatron to differentiate areas which involve considerable extrapolations from current technologies from those which represent more conventional scale-ups. Synchrotron radiation losses per m for the same guide magnetic field associated with such luminosities would be up by E 2 x I where E is the energy and I is the circulating current. This would result in energy densities of ∼250 times the nominal SSC values. The SSC is already limited by installed refrigeration power and if the circulating current was to be increased would have to use liners at liquid nitrogen temperatures to intercept the radiation as is proposed for the LHC. This issue was the subject of lively discussion at the workshop and is dealt with elsewhere by other authors. This author believed that the radiation could be intercepted by room temperature catchers spaced every 15--25 m around the ring. To obtain the requisite luminosities it assumes similar bunch spacing but circulating currents an order of magnitude larger than at the SSC. The SSC already uses a bunch spacing as small as 5 m and further reduction does not appear easy. The justification for the choice of bore for the magnets, emittances and attainable luminosities are discussed below. A further section looks into whether seismic ground disturbances might cause unacceptable emittance growth. The conclusion of this section is that careful use of current design practices should be adequate and that it is unlikely that exotic vibration free mounts will be required

  19. Results from a partial lifetime test of a 40 mm-aperture 17 mm SSC model dipole

    International Nuclear Information System (INIS)

    Radusewicz, P.; Devred, A.; Bush, T.; Coombes, R.; DiMarco, J.; Goodzeit, C.; Kuzminski, J.; Ogitsu, T.; Potter, J.; Puglisi, M.; Sanger, P.; Schermer, R.; Tompkins, J.; Yu, Y.; Zhao, Y.; Zheng, H.; Anerella, M.; Cottingham, J.; Ganetis, G.; Garber, M.; Ghosh, A.; Greene, A.; Gupta, R.; Jain, A.; Kahn, S.; Kelly, E.; Morgan, G.; Muratore, J.; Prodell, A.; Rehak, M.; Roher, E.P.; Sampson, W.; Shutt, R.; Thomas, R.; Thompson, P.; Wanderer, P.; Willen, E.; Bleadon, M.; Hanft, R.; Kuchnir, M.; Mantsch, P.; Mazur, P.O.; Orris, D.; Peterson, T.; Strait, J.; Royett, J.; Scanlan, R.; Taylor, C.

    1992-03-01

    A 40-mm-aperture, 17-m-long Superconducting Super Collider (SSC) model dipole was assembled at Brookhaven National Laboratory (BNL) and tested initially at Fermi National Accelerator Lab (FNAL) and later at BNL. At BNL an extended cycle test was devised to examine the magnet's performance through numerous cold tests and thermal cycles. This paper discusses the magnet's mechanical and quench performance and magnet field measurements during the tests

  20. Dicty_cDB: SSC836 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available SS (Link to library) SSC836 (Link to dictyBase) - - - - SSC836E (Link to Original s...ite) - - - - - - SSC836E 502 Show SSC836 Library SS (Link to library) Clone ID SSC836 (Link to dictyBase) Atlas ID - NBRP ID - dict...yBase ID - Link to Contig - Original site URL http://dictycdb.biol.tsukuba.ac.jp/CSM/...t alignments: (bits) Value N M77492 |M77492.1 Dictyostelium discoideum glycoprotein phosphorylase 2 (glpD) g...ene, complete cds. 779 0.0 1 AC116984 |AC116984.2 Dictyostelium discoideum chromo

  1. Measurement of ac electrical characteristics of SSC dipole magnets at Brookhaven

    International Nuclear Information System (INIS)

    Smedley, K.

    1992-04-01

    The SSC collider is designed to have circumference of 87 km. The superconducting magnets along the collider ring are grouped into ten sectors. Each sector, a string of average length of 8.7 km,m is powered by one power source located near the center of the sector. Because of the alternating-current (ac) electrical characteristics of the magnets, the power supply ripple currents and transients form a time and space distribution in the magnet string which affects particle motions. Additionally, since the power supply load is a magnet string, the current regulation loop design is highly dependent upon the ac electrical characteristics of the magnets. A means is needed to accurately determine the ac electrical characteristics of the superconducting magnets. The ac characteristics of magnets will be used to predict the ripple distribution of the long string of superconducting magnets. Magnet ac characteristics can also provide necessary information for the regulation loop design. This paper presents a method for measuring the ac characteristics of superconducting magnets. Two collider dipole magnets, one superconducting and one at room temperature, were tested at Brookhaven National Lab

  2. Accidental beam loss in superconducting accelerators: Simulations, consequences of accidents and protective measures

    International Nuclear Information System (INIS)

    Drozhdin, A.; Mokhov, N.; Parker, B.

    1994-02-01

    The consequences of an accidental beam loss in superconducting accelerators and colliders of the next generation range from the mundane to rather dramatic, i.e., from superconducting magnet quench, to overheating of critical components, to a total destruction of some units via explosion. Specific measures are required to minimize and eliminate such events as much as practical. In this paper we study such accidents taking the Superconducting Supercollider complex as an example. Particle tracking, beam loss and energy deposition calculations were done using the realistic machine simulation with the Monte-Carlo codes MARS 12 and STRUCT. Protective measures for minimizing the damaging effects of prefire and misfire of injection and extraction kicker magnets are proposed here

  3. Applied superconductivity

    CERN Document Server

    Newhouse, Vernon L

    1975-01-01

    Applied Superconductivity, Volume II, is part of a two-volume series on applied superconductivity. The first volume dealt with electronic applications and radiation detection, and contains a chapter on liquid helium refrigeration. The present volume discusses magnets, electromechanical applications, accelerators, and microwave and rf devices. The book opens with a chapter on high-field superconducting magnets, covering applications and magnet design. Subsequent chapters discuss superconductive machinery such as superconductive bearings and motors; rf superconducting devices; and future prospec

  4. System engineering in the SSC Linac

    International Nuclear Information System (INIS)

    Tooker, J.F.; Chang, C.R.; Cutler, R.I.; Funk, L.W.; Guy, F.W.; Hale, R.; Leifeste, G.T.; Nonte, J.; Prichard, B.; Raparia, D.; Saadatmand, K.; Sethi, R.C.; Yao, C.G.

    1992-01-01

    The design and construction of the SSC Linac involves various departments within the SSCL and many outside vendors. The adaptive incorporation of system engineering principles into the SSC Linac is described. This involves the development of specification trees with the breakdown and flow of functional and physical requirements from the top level system specifications to the lower level component specifications. Interfaces are defined, which specify and control the interconnections between the various components. Review cycles are presented during which the requirements, evolution of the design, and test plans are reviewed, monitored, and finalized. The Linac specification tree, interface definition, and reviews of the Linac are presented, including typical examples. (Author) 2 refs., 3 tabs

  5. Magnetic field decay in model SSC dipoles

    International Nuclear Information System (INIS)

    Gilbert, W.S.; Althaus, R.F.; Barale, P.J.; Benjegerdes, R.W.; Green, M.A.; Green, M.I.; Scanlan, R.M.

    1988-08-01

    We have observed that some of our model SSC dipoles have long time constant decays of the magnetic field harmonics with amplitudes large enough to result in significant beam loss, if they are not corrected. The magnets were run at constant current at the SSC injection field level of 0.3 tesla for one to three hours and changes in the magnetic field were observed. One explanation for the observed field decay is time dependent superconductor magnetization. Another explanation involves flux creep or flux flow. Data are presented on how the decay changes with previous flux history. Similar magnets with different Nb-Ti filament spacings and matrix materials have different long time field decay. A theoretical model using proximity coupling and flux creep for the observed field decay is discussed. 10 refs., 5 figs., 2 tabs

  6. Reactivity feedback models for SSC-K

    Energy Technology Data Exchange (ETDEWEB)

    Han, Do Hee; Kwon, Young Min; Kim, Kyung Du; Chang, Won Pyo [Korea Atomic Energy Research Institute, Taejon (Korea)

    1998-06-01

    Safety of KALIMER is assured by the inherent safety of the core and passive safety of the safety-related systems. For the safety analysis of a new reactor design such as KALIMER, analysis models, which are consistent with the design, have to be developed for a plant-wide transient and safety analysis code. Efforts for the development of reactivity feedback models for SSC-K, which is now being developed for the safety analysis of KALIMER, is described in this report. Models for Doppler, sodium density/void, fuel axial expansion, core radial expansion, and CRDL expansion have been developed. Test runs have been performed for the unprotected accident for the verification of the models. Use of KALIMER reactivity coefficients and future development of models for GEM and PSDRS would make it possible to analyze the response of KALIMER under TOP as well as LOF and LOHS accident conditions using SSC-K. (author). 5 refs., 64 figs., 2 tabs.

  7. Compositeness and QCD at the SSC

    International Nuclear Information System (INIS)

    Barnes, V.; Blumenfeld, B.; Cahn, R.

    1987-01-01

    Compositeness may be signaled by an increase in the production of high transverse momentum hadronic jet pairs or lepton pairs. The hadronic jet signal competes with the QCD production of jets, a subject of interest in its own right. Tests of perturbative QCD at the SSC will be of special interest because the calculations are expected to be quite reliable. Studies show that compositeness up to a scale of 20 to 35 TeV would be detected in hadronic jets at the SSC. Leptonic evidence would be discovered for scales up to 10 to 20 TeV. The charge asymmetry for leptons would provide information on the nature of the compositeness interaction. Calorimetry will play a crucial role in the detection of compositeness in the hadronic jet signal. Deviations from an e/h response of 1 could mask the effect. The backgrounds for lepton pair production seem manageable. 30 refs., 19 figs., 10 tabs

  8. The SSC access shafts calculational study

    International Nuclear Information System (INIS)

    Baishev, I.S.; Mokhov, N.V.; Toohig, T.E.

    1991-06-01

    The SSC generic shaft requirements and access spacing are considered elsewhere. The shafts connecting the ground surface with the underground accelerator tunnel deliver to the surface some portion of the radiation created in the tunnel. The radiation safety problem of access shafts consists of two major questions: Does the dose equivalent at the ground surface exceed permissible limits? If it exceeds those limits, what additional shielding measures are required? A few works deal with this problem for high energy machines. This work is an attempt to answer these questions for the basic types of shafts specific to the SSC magnet delivery, utility and personnel shafts using full-scale Monte-Carlo calculations of the entire process from hadronic cascades in the lattice elements to particles scattered in the tunnel, niches, alcoves, shafts and surface bunkers and buildings. 9 refs., 16 figs., 1 tab

  9. Neural networks, D0, and the SSC

    International Nuclear Information System (INIS)

    Barter, C.; Cutts, D.; Hoftun, J.S.; Partridge, R.A.; Sornborger, A.T.; Johnson, C.T.; Zeller, R.T.

    1989-01-01

    We outline several exploratory studies involving neural network simulations applied to pattern recognition in high energy physics. We describe the D0 data acquisition system and a natual means by which algorithms derived from neural networks techniques may be incorporated into recently developed hardware associated with the D0 MicroVAX farm nodes. Such applications to the event filtering needed by SSC detectors look interesting. 10 refs., 11 figs

  10. Engineered design of SSC cooling ponds

    International Nuclear Information System (INIS)

    Bear, J.B.

    1993-05-01

    The cooling requirements of the SSC are significant and adequate cooling water systems to meet these requirements are critical to the project's successful operation. The use of adequately designed cooling ponds will provide reliable cooling for operation while also meeting environmental goals of the project to maintain streamflow and flood peaks to preconstruction levels as well as other streamflow and water quality requirements of the Texas Water Commission and the Environmental Protection Agency

  11. Computing facility at SSC for detectors

    International Nuclear Information System (INIS)

    Leibold, P.; Scipiono, B.

    1990-01-01

    A description of the RISC-based distributed computing facility for detector simulaiton being developed at the SSC Laboratory is discussed. The first phase of this facility is scheduled for completion in early 1991. Included is the status of the project, overview of the concepts used to model and define system architecture, networking capabilities for user access, plans for support of physics codes and related topics concerning the implementation of this facility

  12. The status of detectors at the SSC

    International Nuclear Information System (INIS)

    Stefanski, R.

    1990-09-01

    The announcement of the location of the SSC at the site near Waxahachie, Texas was made in January, 1989. Since then a great many important steps have been taken toward the start of the new Laboratory. Some 900 people have been brought to the site as the starting nucleus of the staff that will ultimate number about 2200. A design baseline has been completed that includes a conceptual design for the accelerator, and the detectors. Also, the process has begun to determine the configuration of detectors that will be built for the SSC. This process has several steps, and now the first of these has been taken: The detector collaborations have submitted the Expression of Interest to the Laboratory. These were reviewed by Laboratory management and the Physics Advisory Committee in July, 1990 and recommendations were made to the collaborations. Decisions were deferred for all of the detectors. But perhaps the most significant recommendation was the request to reduce the size and cost of the general purpose detectors. The detector collaborations are now reviewing their initial designs to prepare for the Letters of Intent, the next step in the detector planning process. This is clearly a difficult and crucial step in that the redesign of the detectors must be done with minimal reduction in detector quality. It is an interesting time in the development of the new laboratory, and a crucial time for the ultimate physics that will be done at the SSC

  13. Passive superconductor: A viable method of controlling magnetization multipoles in the SSC dipole

    International Nuclear Information System (INIS)

    Green, M.A.

    1989-02-01

    At injection, the magnetization of the superconductor produces the dominant field error in the SSC dipole magnets. The field generated by magnetization currents in the superconductor is rich in higher symmetric multipoles (normal sextupole, normal decapole, and so on). Pieces of passive superconductor properly located within the bore of the dipole magnet can cancel the higher multipoles generated by the SSC dipole coils. The multipoles generated by the passive superconductor (predominantly sextupole and decapole) are controlled by the angular and radial location of the superconductor, the volume of superconductor, and the size of the superconducting filaments within the passive conductor. This paper will present the tolerances on each of these factors. The paper will show that multipole correction using passive superconductor is in general immune to the effects of temperature and magnetization decay due to flux creep, provided that dipole superconductor and the passive correction superconductor are properly specified. When combined with a lumped correction system, the passive superconductor can be a viable alternative to continuous correction coils within the SSC dipoles. 20 refs., 8 figs., 2 tabs

  14. Passive superconductor a viable method of controlling magnetization multipoles in the SSC dipole

    International Nuclear Information System (INIS)

    Green, M.A.

    1989-01-01

    At injection, the magnetization of the superconductor produces the dominant field error in the SSC dipole magnets. The field generated by magnetization currents in the superconductor is rich in higher symmetric multipoles (normal sextupole, normal decapole, and so on). Pieces of passive superconductor properly located within the bore of the dipole magnet can cancel the higher multipoles generated by the SSC dipole coils. The multipoles generated by the passive superconductor (predominantly sextupole and decapole) are controlled by the angular and radial location of the superconductor, the volume of superconductor, and the size of the superconducting filaments within the passive conductor. This paper will present the tolerances on each of these factors. The paper will show that multipole correction using passive superconductor is in general immune to the effects of temperature and magnetization decay due to flux creep, provided that dipole superconductor and the passive correction superconductor are properly specified. When combined with a lumped correction system, the passive superconductor can be a viable alternative to continuous correction coils within the SSC dipoles. 20 refs., 8 figs., 2 tabs

  15. Background information on the SSC project

    International Nuclear Information System (INIS)

    Warren, J.

    1991-10-01

    This report discusses the following information about the Superconducting Super Collider: Goals and milestones; civil construction; ring components; cryogenics; vacuum and cooling water systems; electrical power; instrumentation and control systems; and installation planning

  16. Meeting the demands of future colliders

    Energy Technology Data Exchange (ETDEWEB)

    Blanar, George [LeCroy Corporation (United States)

    1990-07-15

    Physicists are very aware of the challenge of developing and building detectors and instrumentation for the next generation of proton colliders - the US Superconducting Supercollider (SSC) and CERN's LHC. The accompanying articles highlight special problems in electronics and in computing, but the effort underway extends over a wider front.

  17. WORKSHOP: Scintillating fibre detectors

    International Nuclear Information System (INIS)

    Anon.

    1989-01-01

    Scintillating fibre detector development and technology for the proposed US Superconducting Supercollider, SSC, was the subject of a recent workshop at Fermilab, with participation from the high energy physics community and from industry. Sessions covered the current status of fibre technology and fibre detectors, new detector applications, fluorescent materials and scintillation compositions, radiation damage effects, amplification and imaging structures, and scintillation fibre fabrication techniques

  18. US nuclear physics funding

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    Because of restrictions in the federal budget, US science spending is coming under close scrutiny, with strong implications for the evolution of the nation's physics research. Recently the Witherell subpanel of the Department of Energy's High Energy Physics Advisory Panel (HEPAP) submitted recommendations on how the US research scene could evolve pending commissioning of the SSC Superconducting Supercollider

  19. DETECTORS: Calorimeters at Capri

    International Nuclear Information System (INIS)

    Anon.

    1991-01-01

    The second International Conference on Calorimetry in High Energy Physics, held from 14-18 October on the island of Capri, included a workshop dedicated to the important problem of calorimetry for experiments at future big proton colliders - the LHC at CERN and the Superconducting Supercollider (SSC) in the USA

  20. Meeting the demands of future colliders

    International Nuclear Information System (INIS)

    Blanar, George

    1990-01-01

    Physicists are very aware of the challenge of developing and building detectors and instrumentation for the next generation of proton colliders - the US Superconducting Supercollider (SSC) and CERN's LHC. The accompanying articles highlight special problems in electronics and in computing, but the effort underway extends over a wider front

  1. Thermal optimization of the helium-cooled power leads for the SSC

    International Nuclear Information System (INIS)

    Demko, J.A.; Schiesser, W.E.; Carcagno, R.; McAshan, M.; McConeghy, R.

    1992-03-01

    The optimum thermal design of the power leads for the Superconducting Super Collider (SSC) will minimize the amount of Carnot work (which is a combination of refrigeration and liquefaction work) required. This optimization can be accomplished by the judicious selection of lead length and diameter. Even though an optimum set of dimensions is found, the final design must satisfy other physical constraints such as maximum allowable heat leak and helium vapor mass flow rate. A set of corresponding lengths and diameters has been determined that meets these requirements for the helium vapor-cooled, spiral-fin power lead design of the SSC. Early efforts by McFee and Mallon investigated optimizing power leads for cryogenic applications with no convection cooling. Later designs utilized the boiled-off helium vapor to cool the lead. One notable design for currents up to several thousand amps is presented by Efferson based on a series of recommendations discussed by Deiness. Buyanov presents many theoretical models and design formulate but does not demonstrate an approach to thermally optimizing the design of a vapor-cooled lead. A method for optimizing superconducting magnet current leads is described by Maehata et al. The approach assumes that the helium boil-off caused by heat conduction along with power lead into the low-temperature helium is used to cool the lead. The optimum solution is found when the heat flow at the cold end is minimized.. In this study, a detailed numerical thermal model of a power lead design for the SSC has been developed. It was adapted from the dynamic model developed by Schiesser. This model was used to determine the optimum dimensions that minimize the Carnot refrigeration and liquefaction work due to the leads

  2. Report of the Ad Hoc Committee on SSC physics

    International Nuclear Information System (INIS)

    1990-04-01

    The Ad Hoc Committee on SSC Physics has reexamined the relationship between beam energy, machine luminosity, and physics capability. In the next section, the physics motivation for the SSC is reviewed in general terms. This is followed by a discussion of the ability to detect a number of specific processes as a function of the SSC energy and luminosity. The viability of various detector technologies is then assessed as a function of luminosity. The report ends with a brief summary and some conclusions

  3. Parameter selection for the SSC trade-offs and optimization

    International Nuclear Information System (INIS)

    Edwards, D.A.; Syphers, M.J.

    1991-01-01

    In November of 1988, a site was selected in the state of Texas for the SSC. In January of 1989, the SSC Laboratory was established in Texas to adapt the design of the collider to the site and to manage the construction of the project. This paper describes the evolution of the SSC design since site selection, notes the increased concentration on the injector system, and addresses the rationale for choice of parameters

  4. Detectors for the superconducting super collider, design concepts, and simulation

    Energy Technology Data Exchange (ETDEWEB)

    Gabriel, T.A.

    1989-06-01

    The physics of compensation calorimetry is reviewed in the light of the needs of the Superconducting Super Collider (SSC) detectors. The four major detector types: liquid argon, scintillator, room temperature liquids, and silicon, are analyzed with respect to some of their strengths and weaknesses. Finally, general comments are presented which reflect the reliability of simulation code systems.

  5. Detectors for the superconducting super collider, design concepts, and simulation

    International Nuclear Information System (INIS)

    Gabriel, T.A.

    1989-06-01

    The physics of compensation calorimetry is reviewed in the light of the needs of the Superconducting Super Collider (SSC) detectors. The four major detector types: liquid argon, scintillator, room temperature liquids, and silicon, are analyzed with respect to some of their strengths and weaknesses. Finally, general comments are presented which reflect the reliability of simulation code systems

  6. Detectors for the Superconducting Super Collider, design concepts, and simulation

    International Nuclear Information System (INIS)

    Gabriel, T.A.

    1989-01-01

    The physics of compensation calorimetry is reviewed in the light of the need of the Superconducting Super Collider (SSC) detectors. The four major detector types: liquid argon, scintillator, room temperature liquids, and silicon, are analyzed with respect to some of their strengths and weaknesses. Finally, general comments are presented which reflect the reliability of simulation code systems. 29 refs., 20 figs., 6 tabs

  7. Uses of the chiral Lagrangian at the SSC

    International Nuclear Information System (INIS)

    Dawson, S.

    1992-09-01

    In the event that the SSC does not observe any resonances such as a Higgs boson or a techni-rho meson, we would like to know if the SSC can still discover something about the nature of the electroweak symmetry breaking. In particular, we consider the question of whether there is a ''no-lose'' corollary at the SSC. We will use chiral Lagrangian techniques to address this question and analyze their utility for studying events containing W and Z gauge bosons at the SSC

  8. Full length prototype SSC dipole test results

    International Nuclear Information System (INIS)

    Strait, J.; Brown, B.C.; Carson, J.

    1987-01-01

    Results are presented from tests of the first full length prototype SSC dipole magnet. The cryogenic behavior of the magnet during a slow cooldown to 4.5K and a slow warmup to room temperature has been measured. Magnetic field quality was measured at currents up to 2000 A. Averaged over the body field all harmonics with the exception of b 2 and b 8 are at or within the tolerances specified by the SSC Central Design Group. (The values of b 2 and b 8 result from known design and construction defects which will be be corrected in later magnets.) Using an NMR probe the average body field strength is measured to be 10.283 G/A with point to point variations on the order of one part in 1000. Data are presented on quench behavior of the magnet up to 3500 A (approximately 55% of full field) including longitudinal and transverse velocities for the first 250 msec of the quench

  9. Scintillating fiber detection development for the SSC

    International Nuclear Information System (INIS)

    Ruchti, R.

    1993-01-01

    SSC Detector Program at Notre Dame has been concentrating on the development of scintillating fiber detectors for tracking applications. Initial work has focused on the development of new scintillation materials for micro-tracking and central tracking detectors based on organic plastics and liquids, This effort has included studies of solvents, solutes and waveguides. Techniques capable of providing the detection of single photons from fibers, are also being developed, leading to a collaboration with Rockwell, UCLA, and UTexas-Dallas groups on the development and application of the Solid State Photomultiplier (SSPM). This initial collaboration has been strengthened and expanded to the formation of a larger collaboration whose goal is to develop a fiber tracking subsystem for SSC, incorporating scintillating fibers and solid state photodetectors. The major subsystem proposal submitted to SSCL by this new collaboration, known at the Fiber Tracking Group (FTG), has been approved and funding is being put in place. The collaboration consists of 12 institutions and Notre Dame is a spokesman group

  10. Preserving SSC Design Function Using RCM Principles

    International Nuclear Information System (INIS)

    Mohammadi, K.

    2009-01-01

    Reliability-Centered Maintenance (RCM) can be defined as an approach that employs preventive, predictive, proactive, and reactive maintenance practices and strategies in an integrated manner to increase the probability that a Structure, System, or Component (SSC) will function as designed over its life cycle with optimum maintenance. The goal of RCM is to preserve the SSC intended design function at the lowest cost by developing a maintenance strategy that is supported by sound technical and economic justification. RCM has been used extensively by the aircraft, space, defense, power generation, and manufacturing industries where functional failures of SSCs can have the potential to compromise worker or public safety, cause adverse environmental impact, cause loss of production, and/or result in excessive damage to critical SSCs. This paper provides a framework for performing an RCM analysis in support of DOE Order 430.1A (Life Cycle Asset Management) and DOE Order 420.1B (Facility Safety). The influence of RCM on the various aspects of the maintenance program including the work control process is also discussed

  11. An alternate end design for SSC dipoles

    International Nuclear Information System (INIS)

    Peters, C.; Caspi, S.; Taylor, C.

    1989-02-01

    Experience in the SSC dipole program has shown that fabrication of cylindrical coil ends is difficult. Cable stiffness requires large forces to maintain the proper position of the conductors in the end during winding. After winding, the coil ends remain distorted nd significant motion of the need conductors is required to force the coil end into the molding cavity. Local mechanical stresses are high during this process and extra pieces of insulation are required to prevent turn-to-turn shorts from developing during the winding and molding steps. Prior to assembly the coil end is compressed in a mold cavity and injected with a filler material to correct surface irregularities and fill voids in the end. LBL has developed an alternate design which permits the conductors to be wound over the end using minimal force and technician coerosion. The conductors are placed on a conical surface where the largest diameter over the outer layer conductors is 10 cm. No coil end spaces or insulation pieces between turns are required. The conductor geometry was analytically optimized to meet SSC multipole requirements for the ends. The first 1-m dipole utilizing this end geometry has been constructed and successfully tested. Design and construction data are presented. Also model test results, including training and multipole measurements of the end are given. 1 ref., 12 figs., 3 tabs

  12. Eddy current and quench loads and stress of SSC collider 4-K liner and the bore tube during magnet quench

    International Nuclear Information System (INIS)

    Leung, K.K.; Shu, Q.S.

    1993-07-01

    This paper describes the response of the eddy current and quench loads on a proposed Superconducting SuperCollider 4-K liner system. The liner within a bore tube is designed to remove the radiated power and the photodesorbed gas that impair the beam tube vacuum. The bimetallic liner tube is subjected to cooldown and eddy current loads. The square liner tube is a two-shell laminated Nitronic-40 steel is used for strength and a copper inner layer for low impedance to the image currents. Perforated holes are used to remove the photodesorbed gases for vacuum maintenance. The holes are located in a low-stress area of the liner. Rectangular holes in a four-pole symmetry pattern are required for beam dynamic stability. The liner is conductivity cooled by the round steel bore tube with a 2-mm wall. The copper layer must not be stressed over the yield strength limit because copper properties such as conductivity are known to change when the copper is stressed over yield strength. This analysis will address liner system response under thermal, eddy current, and vaporized liquid helium loads in a quenching dipole magnet

  13. Laying the keel

    Energy Technology Data Exchange (ETDEWEB)

    Southworth, Brian

    1989-12-15

    The start of construction of the 87-kilometre US Superconducting Supercollider (SSC) was celebrated in Dallas at the beginning of October with a Texas-style meeting on SSC physics and experiments. Chris Quigg described it as 'laying the keel of a new vessel of discovery'. The vessel is scheduled to make its maiden voyage with 20 TeV (20,000 GeV) proton beams in 1998.

  14. INTERNATIONAL COLLABORATION: US panel members named

    International Nuclear Information System (INIS)

    Anon.

    1994-01-01

    After the demise of the US Superconducting Supercollider (SSC) project, the US Secretary of Energy has been requested to produce a plan to 'maximize the value of the investment in the project and minimizing the loss to the US, including recommendations as to the feasibility of utilizing SSC assets in whole or in part in pursuit of an international high energy physics endeavour.'

  15. Window shopping

    International Nuclear Information System (INIS)

    Anon.

    1987-01-01

    'A large window for surprises' was how Gordon Kane of Michigan summarized the potential of the proposed 84-kilometre US Superconducting Supercollider (SSC). With George Trilling of Berkeley unable to attend this year's High Energy Physics Conference at Vanderbilt University, Nashville, Tennessee, from 8-10 October, Kane played a dual role - looking ahead to SSC physics, and summarizing the meeting

  16. Superconductivity - applications

    International Nuclear Information System (INIS)

    The paper deals with the following subjects: 1) Electronics and high-frequency technology, 2) Superconductors for energy technology, 3) Superconducting magnets and their applications, 4) Electric machinery, 5) Superconducting cables. (WBU) [de

  17. Status of 4-cm-aperture, 17-m-long SSC dipole magnet R ampersand D program at BNL

    International Nuclear Information System (INIS)

    Devred, A.; Bush, T.; Coombes, R.; DiMarco, J.; Goodzeit, C.; Kuzminski, J.; Puglisi, M.; Radusewicz, P.; Sanger, P.; Schermer, R.; Spigo, G.; Tompkins, J.; Turner, J.; Wolf, Z.; Yu, Y.; Zheng, H.; Ogitsu, T.; Anarella, M.; Cottingham, J.; Ganetis, G; Garber, M.; Ghosh, A.; Greene, A.; Gupta, R.; Herrera, J.; Kahn, S.; Kelly, E.; Meade, A.; Morgan, G.; Muratore, J.; Prodell, A.; Rehak, M.; Rohrer, E.P.; Sampson, W.; Shutt, R.; Thompson, P.; Wanderer, P.; Willen, E.; Bleadon, M.; Hanft, R.; Kuchnir, M.; Mantsch, P.; Mazur, P.O.; Orris, D.; Peterson, T.; Strait, J.; Royet, J.; Scanlan, R.; Taylor, C.

    1991-06-01

    Over the last year-and-a-half, several 4-cm-aperture, 17-m-long dipole magnet prototypes were built by Brookhaven National Laboratory (BNL) under contract with the Superconducting Super Collider (SSC) Laboratory. These prototypes are the last phase of a half-decade-long R ampersand D program, carried out in collaboration with Fermi National Accelerator Laboratory and Lawrence Berkeley Laboratory, and aimed at demonstrating the feasibility of the SSC main ring dipole magnets. They also prepare the way of the 5-cm-aperture dipole magnet program to be started soon. In this paper, we analyze the mechanical behavior of the BNL prototypes during cool-down and excitation, and we attempt to relate this behavior to the magnet features. The data reveal that the mechanical behavior is sensitive to the vertical collar-yoke interference, and that the magnets exhibited somewhat erratic changes in coil end-loading during cool-down. 9 refs., 6 figs

  18. Relativistic atomic physics at the SSC

    International Nuclear Information System (INIS)

    1990-01-01

    This report discusses the following proposed work for relativistic atomic physics at the Superconducting Super Collider: Beam diagnostics; atomic physics research; staffing; education; budget information; statement concerning matching funds; description and justification of major items of equipment; statement of current and pending support; and assurance of compliance

  19. Dicty_cDB: SSC534 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available SS (Link to library) SSC534 (Link to dictyBase) - - - Contig-U13922-1 SSC534Z (Link... to Original site) - - SSC534Z 711 - - - - Show SSC534 Library SS (Link to library) Clone ID SSC534 (Link to dic... 1.3 FM992688_1247( FM992688 |pid:none) Candida dubliniensis CD36 chrom... 35 3.0 EU565733_1( EU565733 |pid:none) Unculture... 20.0 %: nuclear 16.0 %: vesicles of secretory system 12.0 %: mitochondrial 8.0 %: Golgi 8.0 %: endoplasmic reticul...kholderia multivorans ATCC 1... 33 6.6 AM260479_1383( AM260479 |pid:none) Ralstonia e

  20. Dicty_cDB: SSC538 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available SS (Link to library) SSC538 (Link to dictyBase) - - - Contig-U13922-1 SSC538Z (Link... to Original site) - - SSC538Z 712 - - - - Show SSC538 Library SS (Link to library) Clone ID SSC538 (Link to dic...SHR34... 36 1.3 FM992688_1247( FM992688 |pid:none) Candida dubliniensis CD36 chrom... 35 3.0 EU565733_1( EU565733 |pid:none) Uncultur...9385_2728( AP009385 |pid:none) Burkholderia multivorans ATCC 1... 33 6.6 AM260479_1383( AM260479 |pid:none) ... reticulum 4.0 %: extracellular, including cell wall 4.0 %: cytoskeletal 4.0 %: vacu

  1. SSC physics signatures and trigger requirements

    International Nuclear Information System (INIS)

    1985-01-01

    Strategies are considered for triggering on new physics processes on the environment of the SSC, where interaction rates will be very high and most new physics processes quite rare. The quantities available for use in the trigger at various levels are related to the signatures of possible new physics. Two examples were investigated in some detail using the ISAJET Monte Carlo program: Higgs decays to W pairs and a missing energy trigger applied to gluino pair production. In both of the examples studied in detail, it was found that workable strategies for reducing the trigger rate were obtainable which also produced acceptable efficiency for the processes of interest. In future work, it will be necessary to carry out such a program for the full spectrum of suggested new physics

  2. Closed orbit correction in the SSC

    International Nuclear Information System (INIS)

    Bourianoff, G.; Cole, B.; Ferede, H.; Pilat, F.

    1991-01-01

    Most of the techniques associated with closed orbit correction are widely known. The present paper gives a brief description of one such method and discusses the results obtained when it is applied to the SSC collider lattice. The emphasis is on features of the lattice which effect closed orbit correction and it is likely that any of the 8 methods cataloged in a cited reference would yield similar results. The global scheme described here is very robust and easy to apply. The results of three separate studies are briefly described. Typical results for the residual RMS closed orbit in the arc is calculated to be 0.65 mm with peak values of 3 mm

  3. GIS/FIS development for the SSC

    International Nuclear Information System (INIS)

    Oslin, A.; Butalla, M.

    1992-01-01

    Facility management for a project of the size and complexity of the SSCL is a challenging task. The Facility Information System/Geographic Information System (FIS/GIS) should provide an effective tool for the demanding work ahead. Both the FIS and GIS encompass information that many potential users across multiple disciplines will require for effective facility management. FIS will be integrated with the GIS for applications that involve duplicate needs of graphic and attribute data. In particular, infrastructure networks, environmental monitoring, emergency dispatching, and hazardous materials management have been identified as areas where the two systems will interface. In general, the GIS will manage graphic and attribute information outside the actual structure of the SSCL. The FIS will take over operation of components and networks within the SSCL facility. By providing a method for informed decision-making, implementation of the SSC FIS/GIS will facilitate the tasks involved in managing our Laboratory during all phases of its life

  4. The SSC full cell prototype string test

    International Nuclear Information System (INIS)

    Kraushaar, P.; Burgett, W.; Cromer, L.

    1994-11-01

    At the conclusion of the SSC half cell magnet string testing program. In February, 1993, the preliminary data analysis revealed that several substantive technical questions remained unresolved. These questions were: (1) could the high voltages to ground (>2 kV) measured during fault (quench) conditions be substantially reduced, (2) could the number of magnetic elements that became resistive (quenched) be controlled and (3) did the cryostats of the magnetic elements provide adequate insulation and isolation to meet designed refrigeration loads. To address these and other existing question a prototypical full cell of collider magnets (ten dipoles and two quadrupoles) was assembled and tested. At the conclusion of this testing there were definitive answers to most of the questions with numerical substantiation, the notable exception being the beat leak question. These answers and other results and issues are presented in this paper

  5. Physics requirements for LHC/SSC calorimetry

    International Nuclear Information System (INIS)

    Green, D.

    1991-10-01

    The goal of the next generation of collider detectors is to study the origin of electroweak symmetry breaking. The mass scale for this study is roughly 1 TeV. No matter what the details of the mechanism, one can be confident that new phenomena will occur, since weak interactions become strong, i.e., violate partial wave unitarity, at that mass scale. The partial wave amplitude for ee→ WW scattering is; ao∼4φ/α w (M w /M) 2 , ao∼1 if M ∼1 TeV. Therefore, the detectors for LHC/SSC must be able to confront this mass scale. In particular, the electroweak dynamics is such that the study of gauge boson pairs has a high priority. Given that the simplest decay modes for gauge boson are into leptons, the new detectors will naturally tend to optimize performance for leptons

  6. Requirements for SSC central computing staffing (conceptual)

    International Nuclear Information System (INIS)

    Pfister, J.

    1985-01-01

    Given a computation center with --10,000 MIPS supporting --1,000 users, what are the staffing requirements? The attempt in this paper is to list the functions and staff size required in a central computing or centrally supported computing complex. The organization assumes that although considerable computing power would exist (mostly for online) in the four interaction regions (IR) that there are functions/capabilities better performed outside the IR and in this model at a ''central computing facility.'' What follows is one staffing approach, not necessarily optimal, with certain assumptions about numbers of computer systems, media, networks and system controls, that is, one would get the best technology available. Thus, it is speculation about what the technology may bring and what it takes to operate it. From an end user support standpoint it is less clear, given the geography of an SSC, where and what the consulting support should look like and its location

  7. Single bunch instabilities in an SSC

    International Nuclear Information System (INIS)

    Ruth, R.D.

    1984-01-01

    In this note coherent instability thresholds are estimated for the SSC and discuss some of the subsequent design restrictions. The various instabilities are set out in a block diagram with the essential features of each. The assumption is made that long wavelength coupled bunch effects can be cured effectively by a feedback system (both longitudinal and transverse) and that the impedance of the feedback system is such as to cancel that of the environment (at low frequency). Alternatively, the long wake field is assumed to be exactly canceled, on the average, by a feedback wake field. This leaves only single bunch effects. Thresholds for fast-blowup are discussed both in the longitudinal and transverse and the transverse mode coupling instability more familiar in electron/positron storage rings is covered. The impedances considered are a broadband impedance and the resistive wall impedance

  8. The SSC full cell prototype string test

    International Nuclear Information System (INIS)

    McInturff, A.D.; Kraushaar, P.; Burgett, W.; Cromer, L.

    1994-01-01

    At the conclusion of the SSC half cell magnet string testing program in February, 1993, the preliminary data analysis revealed that several substantive technical questions remained unresolved. These questions were: (1) could the high voltages to ground (>2 kV) measured during fault (quench) conditions be substantially reduced, (2) could the number of magnetic elements that became resistive (quenched) be controlled and 3) did the cryostats of the magnetic elements provide adequate insulation and isolation to meet designed refrigeration loads. To address these and other existing questions, a prototypical fall cell of collider magnets (ten dipoles and two quadrupoles) was assembled and tested. At the conclusion of this testing there were definitive answers to most of the questions with numerical substantiation, the notable exception being the beat leak question. These answers and other results and issues are presented in this paper

  9. Ac loss measurement of SSC dipole magnets

    International Nuclear Information System (INIS)

    Delchamps, S.; Hanft, R.; Jaffery, T.; Kinney, W.; Koska, W.; Lamm, M.J.; Mazur, P.O.; Orris, D.; Ozelis, J.P.; Strait, J.; Wake, M.

    1992-09-01

    AC losses in full length and 1.5 m model SSC collider dipoles were successfully measured by the direct observation of energy flow into and out of magnets during a ramp cycle. The measurement was performed by using two double-integrating type digital volt meters (DVM's) for current and voltage measurement. Measurements were performed for six is m long ASST magnets and five 1.5 m long model magnets, inducting one 40 mm diameter magnet. There were large variations in the eddy current losses. Since these magnets use conductors with slight deviations in their internal structures and processing of the copper surface depending on the manufacturer, it is likely that there are differences in the contact resistance between strands. Correlation between the ramp rate dependence of the,quench current and the eddy current loss was evident

  10. Radiation levels in the SSC interaction regions

    Energy Technology Data Exchange (ETDEWEB)

    Groom, D.E. [ed.

    1988-06-10

    The radiation environment in a typical SSC detector has been evaluated using the best available particle production models coupled with Monte Carlo simulations of hadronic and electromagnetic cascades. The problems studied include direct charged particle dose, dose inside a calorimeter from the cascades produced by incident photons and hadrons, the flux of neutrons and photons backscattered from the calorimeter into a central cavity, and neutron flux in the calorimeter. The luminosity lifetime at the SSC is dominated by collision losses in the interaction regions, where the luminosity is equivalent to losing an entire full-energy proton beam into the apparatus every six days. The result of an average p-p collision can be described quite simply. The mean charged multiplicity is about 110, and the particles are distributed nearly uniformly in pseudorapidity ({eta}) over all the angles of interest. The transverse momentum distribution is independent of angle, and for our purposes may be written as p{perpendicular}exp(-p{perpendicular}/{beta}). The mean value of p{perpendicular} may be as high as 0.6 GeV/c. Most of the radiation is produced by the very abundant low-p{perpendicular} particles. The dose or neutron fluence produced by individual particles in this energy region are simulated over a wide variety of conditions, and several measurements serve to confirm the simulation results. In general, the response (a dose, fluence, the number of backscattered neutrons, etc.) for an incident particle of momentum p can be parameterized in the form Np{sup {alpha}}, where 0.5 < {alpha}< 1.0. The authors believe most of their results to be accurate to within a factor of two or three, sufficiently precise to serve as the basis for detailed designs.

  11. Variance component analysis of quantitative trait loci for pork carcass composition and meat quality on SSC4 and SSC11

    NARCIS (Netherlands)

    Wijk, van H.J.; Dibbits, B.W.; Liefers, S.C.; Buschbell, H.; Harlizius, B.; Heuven, H.C.M.; Knol, E.F.; Bovenhuis, H.; Groenen, M.A.M.

    2007-01-01

    In a previous study, QTL for carcass composition and meat quality were identified in a commercial finisher cross. The main objective of the current study was to confirm and fine map the QTL on SSC4 and SSC11 by genotyping an increased number of individuals and markers and to analyze the data using a

  12. Three-flavor color superconductivity

    Energy Technology Data Exchange (ETDEWEB)

    Malekzadeh, H.

    2007-12-15

    I investigate some of the inert phases in three-flavor, spin-zero color-superconducting quark matter: the CFL phase (the analogue of the B phase in superfluid {sup 3}He), the A and A{sup *} phases, and the 2SC and sSC phases. I compute the pressure of these phases with and without the neutrality condition. Without the neutrality condition, after the CFL phase the sSC phase is the dominant phase. However, including the neutrality condition, the CFL phase is again the energetically favored phase except for a small region of intermediate densities where the 2SC/A{sup *} phase is favored. It is shown that the 2SC phase is identical to the A{sup *} phase up to a color rotation. In addition, I calculate the self-energies and the spectral densities of longitudinal and transverse gluons at zero temperature in color-superconducting quark matter in the CFL phase. I find a collective excitation, a plasmon, at energies smaller than two times the gap parameter and momenta smaller than about eight times the gap. The dispersion relation of this mode exhibits a minimum at some nonzero value of momentum, indicating a van Hove singularity. (orig.)

  13. Three-flavor color superconductivity

    International Nuclear Information System (INIS)

    Malekzadeh, H.

    2007-12-01

    I investigate some of the inert phases in three-flavor, spin-zero color-superconducting quark matter: the CFL phase (the analogue of the B phase in superfluid 3 He), the A and A * phases, and the 2SC and sSC phases. I compute the pressure of these phases with and without the neutrality condition. Without the neutrality condition, after the CFL phase the sSC phase is the dominant phase. However, including the neutrality condition, the CFL phase is again the energetically favored phase except for a small region of intermediate densities where the 2SC/A * phase is favored. It is shown that the 2SC phase is identical to the A * phase up to a color rotation. In addition, I calculate the self-energies and the spectral densities of longitudinal and transverse gluons at zero temperature in color-superconducting quark matter in the CFL phase. I find a collective excitation, a plasmon, at energies smaller than two times the gap parameter and momenta smaller than about eight times the gap. The dispersion relation of this mode exhibits a minimum at some nonzero value of momentum, indicating a van Hove singularity. (orig.)

  14. Superconducting Magnets for Accelerators

    Science.gov (United States)

    Brianti, G.; Tortschanoff, T.

    1993-03-01

    This chapter describes the main features of superconducting magnets for high energy synchrotrons and colliders. It refers to magnets presently used and under development for the most advanced accelerators projects, both recently constructed or in the preparatory phase. These magnets, using the technology mainly based on the NbTi conductor, are described from the aspect of design, materials, construction and performance. The trend toward higher performance can be gauged from the doubling of design field in less than a decade from about 4 T for the Tevatron to 10 T for the LHC. Special properties of the superconducting accelerator magnets, such as their general layout and the need of extensive computational treatment, the limits of performance inherent to the available conductors, the requirements on the structural design are described. The contribution is completed by elaborating on persistent current effects, quench protection and the cryostat design. As examples the main magnets for HERA and SSC, as well as the twin-aperture magnets for LHC, are presented.

  15. United States: From here to 2000

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1990-03-15

    When it becomes operational, the 87-kilometre Superconducting Supercollider proton ring - SSC - now approved to be built in Ellis County, Texas, will dominate the skyline of US particle physics. However SSC experiments would not get underway in earnest until about the year 2000, and to achieve an orderly transition into the SSC era while maintaining continuity in the 'base' (non-SSC) programme, a special subpanel has been set up by the High Energy Physics Advisory Panel - HEPAP - which counsels the US Department of Energy in its role as major paymaster of US particle physics.

  16. Hall probe magnetometer for SSC magnet cables

    International Nuclear Information System (INIS)

    Cross, R.W.; Goldfarb, R.B.

    1991-01-01

    The authors of this paper constructed a Hall probe magnetometer to measure the magnetization hysteresis loops of Superconducting Super Collider magnet cables. The instrument uses two Hall-effect field sensors to measure the applied field H and the magnetic induction B. Magnetization M is calculated from the difference of the two quantities. The Hall probes are centered coaxially in the bore of a superconducting solenoid with the B probe against the sample's broad surface. An alternative probe arrangement, in which M is measured directly, aligns the sample probe parallel to the field. The authors measured M as a function of H and field cycle rate both with and without a dc transport current. Flux creep as a function of current was measured from the dependence of ac loss on the cycling rate and from the decay of magnetization with time. Transport currents up to 20% of the critical current have minimal effect on magnetization and flux creep

  17. Simulation of the SSC refrigeration system using the ASPEN/SP process simulator

    International Nuclear Information System (INIS)

    Rasson, J.; Dweck, J.

    1990-01-01

    The SSC Magnet must be maintained at a superconducting temperature of 4 K. The proposed refrigeration cooling processes consist of fairly simple closed cycles which take advantage of the Joule-Thompson effect via a series of expansions and compressions of helium gas which has been precooled by liquid nitrogen. The processes currently under consideration consist of three cycles, the 20 K shield cooling, the 4.0 K helium refrigerator and the helium liquefier. The process units which are to be employed are compressors, turbines, expanders, mixers, flashes, two stream heat exchangers and multiple stream heat exchangers. The cycles are to be operated at or near steady state. Due to the large number of competing cooling sector designs to be considered and the high capital and operating costs of the proposed processes, the SSC Laboratory requires a software tool for the validation and optimization of the individual designs and for the performance of cost-benefit analyses among competing designs. Since these processes are steady state flow processes involving primarily standard unit operations, a decision was made to investigate the application of a commercial process simulator to the task. Several months of internal evaluations by the SSC Laboratory revealed that while the overall structure and calculation approach of a number of the commercial simulators were appropriate for this task, all were lacking essential capabilities in the areas of thermodynamic property calculations for cryogenic systems and modeling of complex, multiple stream heat exchangers. An acceptable thermodynamic model was provided and a series of simple, but three software vendors. Based on the results of the benchmark tests, the ASPEN/SP process simulator was selected for future modeling work. 2 refs., 4 figs

  18. Underground facility for geoenvironmental and geotechnical research at the SSC Site in Texas

    International Nuclear Information System (INIS)

    Wang, H.F.; Myer, L.R.

    1994-01-01

    The subsurface environment is an important national resource that is utilized for construction, waste disposal and groundwater supply. Conflicting and unwise use has led to problems of groundwater contamination. Cleanup is often difficult and expensive, and perhaps not even possible in many cases. Construction projects often encounter unanticipated difficulties that increase expenses. Many of the difficulties of predicting mechanical behavior and fluid flow and transport behavior stem from problems in characterizing what cannot be seen. An underground research laboratory, such as can be developed in the nearly 14 miles of tunnel at the Superconducting Super Collider (SSC) site, will provide a unique opportunity to advance scientific investigations of fluid flow, chemical transport, and mechanical behavior in situ in weak and fractured, porous rock on a scale relevant to civil and environmental engineering applications involving the subsurface down to a depth of 100 m. The unique element provided by underground studies at the SSC site is three-dimensional access to a range of fracture conditions in two rock types, chalk and shale. Detailed experimentation can be carried out in small sections of the SSC tunnel where different types of fractures and faults occur and where different rock types or contacts are exposed. The entire length of the tunnel can serve as an observatory for large scale mechanical and fluid flow testing. The most exciting opportunity is to mine back a volume of rock to conduct a post-experiment audit following injection of a number of reactive and conservative tracers. Flow paths and tracer distributions can be examined directly. The scientific goal is to test conceptual models and numerical predictions. In addition, mechanical and hydrological data may be of significant value in developing safe and effective methods for closing the tunnel itself

  19. Superconducting Super Collider: Final environmental impact statement: Volume 1

    International Nuclear Information System (INIS)

    1988-12-01

    This Environmental Impact Statement (EIS) provides as much information as possible at this stage of the project development regarding the potential environmental impacts of the proposed construction and operation of a Superconducting Super Collider (SSC) at each of the site alternatives. However, the DOE recognizes that further review under the National Environmental Policy Act (NEPA) is required prior to construction and operation of the proposed SSC project at the selected site based on more detailed design and to identify specific mitigation measures which can be incorporated into final design. Accordingly, following selection of a site for the proposed SSC, the DOE will prepare a Supplemental EIS to address in more detail the impacts of constructing and operating the proposed SSC at the selected site and alternatives for mitigating those impacts. To measure the effects of constructing the SSC at any of the seven alternative sites, the DOE determined which aspects of the human environment would be significantly affected. The EIS describes the baseline conditions at each of the seven site alternatives, the trends underway resulting in changes, the potential environmental impacts expected if the SSC were sited, possible mitigations of adverse impacts, and resulting residual adverse impacts

  20. Personal extrapolation of CDF test beam use to the SSC

    International Nuclear Information System (INIS)

    Nodulman, L.

    1986-01-01

    The author's personal experience in test beam usage at CDF is used to predict SSC needs at the point of turn-on. It is concluded that the test beam demand will reflect the scale of effort involved in SSC detectors rather than the total number of them. Provision for later expansion is recommended. It is also recommended that the test beam facilities, as well as detector electronics, should reflect the available dynamic range; particularly, a single high energy beam derived from the SSC could be shared by several groups

  1. Personal extrapolation of CDF test beam use to the SSC

    Energy Technology Data Exchange (ETDEWEB)

    Nodulman, L.

    1986-06-23

    The author's personal experience in test beam usage at CDF is used to predict SSC needs at the point of turn-on. It is concluded that the test beam demand will reflect the scale of effort involved in SSC detectors rather than the total number of them. Provision for later expansion is recommended. It is also recommended that the test beam facilities, as well as detector electronics, should reflect the available dynamic range; particularly, a single high energy beam derived from the SSC could be shared by several groups. (LEW)

  2. Recent developments in wire chamber tracking at SSC

    International Nuclear Information System (INIS)

    Ogren, H.

    1990-01-01

    All of the major SSC proposed detectors use wire chambers in their tracking systems. The feasibility of wire chambers in an SSC detector has now been established by a number of groups planning detectors at SSC. The major advances during the past year in understanding straw tube drift chambers are presented and several innovations in gaseous wire chambers are discussed. The R and D section will concentrate on progress in drift cell design, electronics and signal processing, and engineering aspects of the tracking designs

  3. Overview of data filtering/acquisition for a 4π detector at the SSC

    International Nuclear Information System (INIS)

    Lankford, A.J.; Dubois, G.P.

    1986-01-01

    The task of the Data Filtering/Acquisition Working Group was to examine the feasibility of acquiring data at the Superconducting Super Collider (SSC) event rates from a 4-π detector with approximately three-quarters of a million electronic channels. An overview of the work on data filtering and acquisition is provided. The assumptions made about the detector, event rates, and event sizes are reviewed, and the overall picture of data flow through the data acqisition system is outlined. The problems of and the general approach to handling of the data during the analog and higher level trigger decision periods are described. The flow of the data to the online processor farm is sketched. Comments are made on software trigger strategies. Some aspects of the overall picture of a generic data acquisition system are sketched. Major issues and some needed develoments are summarized. 12 refs., 3 figs

  4. Design and performance of a new 50mm quadrupole magnet for the SSC

    International Nuclear Information System (INIS)

    Spigo, G.; Cunningham, G.; Goodzeit, C.; Orrell, D.; Turner, J.; Jayakumar, R.

    1994-01-01

    A superconducting quadrupole model magnet with a 50 mm aperture and a gradient of 190 T/m, in operation at 4.35 K and 6500 A, has been designed, built and tested at the SSC. This accelerator magnet is expected to have application in the interaction regions of the collider main rings. Its dipole-type stainless steel collars with mated self-aligning pole spacers were a major innovation in design. The model had stringent requirements on field quality and a conservative 21% current margin. The first two articles have now demonstrated satisfactory quench performance over several thermal cycles, reaching plateau at approximately 8660 A with minimal training. This paper is a brief sketch of the design and preliminary results on the first model. Fabrication and testing are described in other papers of this conference

  5. Design of a model dipole magnet for the SSC high energy booster

    International Nuclear Information System (INIS)

    Hassan, N.; Couzens, K.; Dwyer, S.; Jaisle, A.; Jayakumar, R.; Krishnamurthy, S.; Mihelic, R.; Phillips, S.; Puri, R.K.; Sarna, K.

    1994-01-01

    A superconducting model dipole magnet has been designed to serve as a vehicle in an R ampersand D program to develop a dipole magnet for potential use in the SSC High Energy Booster. The objective has been to use the Brookhaven National Laboratory (BNL) and Fermi National Accelerator Laboratory (FNAL) 50 mm aperture dipole designs to the maximum possible extent for design of a dipole magnet with the same size aperture and a field intensity of 6.67 T. Objectives of this program have also included an evaluation of magnet cross section designs which provides increased margin and includes a field quality iteration on BNL and FNAL dipole designs. The salient parameters of this magnet are listed. In this paper the 2D magnetic and mechanical design of the cold mass in conceptual and detailed form is presented

  6. Two-dimensional magnetic sensitivity to asymmetric and symmetric deviations for SSC quadrupole magnets

    International Nuclear Information System (INIS)

    Xu, M.; Waynert, J.A.

    1994-01-01

    The magnetic multipole sensitivity to asymmetric and symmetric deviations is analyzed in the two-dimensional cross-section of SSC quadrupole magnets. Deviations in the 2D cross-section caused by variations in the superconducting cable locations due to changes in the thickness of the pole sheet, mid plane insulation, inter-layer spacer, backing sheet, and copper wedges have direct impact on the magnetic field gradient and multipoles in the straight section of the magnets. Asymmetric deviations due to different coil sizes in a cross-section are also analyzed. The analyses are performed mainly with the software package AHARM. SSCMAG and finite element software PE2D were also used to obtain baselines and to verify the results. The results provide information essential to an understanding of the deviations of the multipoles resulting from manufacturing processes, and suggest possibilities for tuning the multipoles to meet the magnetic requirements

  7. Lamination and end pack design studies of SSC low energy booster magnet prototypes

    International Nuclear Information System (INIS)

    Li, N.

    1993-05-01

    The SSC Laboratory plans to deploy two ''large'' detectors for the essential high-energy physics experiments at the initial startup of the collider. The GEM detector is optimized to emphasize precise measurement of photons and electrons, as well as precise tracking of high-energy muons. An essential part of the GEM detector is the magnet subsystem, which provides the magnetic field necessary for identification and high-resolution tracking of charged particles. This large superconducting magnet system, with ferromagnetic field-shapers, presents a variety of engineering challenges in superconductor technology, in magnet-winding technology, fabrication, assembly and installation of large and heavy components, and in ensuring the required high operating availability

  8. Three dimensional δf simulations of beams in the SSC

    International Nuclear Information System (INIS)

    Koga, J.; Tajima, T.; Machida, S.

    1993-01-01

    A three dimensional δf strong-strong algorithm has been developed to apply to the study of such effects as space charge and beam-beam interaction phenomena in the Superconducting Super Collider (SSC). The algorithm is obtained from the merging of the particle tracking code Simpsons used for 3 dimensional space charge effects and a δf code. The δf method is used to follow the evolution of the non-gaussian part of the beam distribution. The advantages of this method are twofold. First, the Simpsons code utilizes a realistic accelerator model including synchrotron oscillations and energy ramping in 6 dimensional phase space with electromagnetic fields of the beams calculated using a realistic 3 dimensional field solver. Second, the beams are evolving in the fully self-consistent strong-strong sense with finite particle fluctuation noise is greatly reduced as opposed to the weak-strong models where one beam is fixed

  9. Three dimensional [delta]f simulations of beams in the SSC

    Energy Technology Data Exchange (ETDEWEB)

    Koga, J.; Tajima, T. (Texas Univ., Austin, TX (United States). Inst. for Fusion Studies); Machida, S. (Superconducting Super Collider Lab., Dallas, TX (United States))

    1993-02-01

    A three dimensional [delta]f strong-strong algorithm has been developed to apply to the study of such effects as space charge and beam-beam interaction phenomena in the Superconducting Super Collider (SSC). The algorithm is obtained from the merging of the particle tracking code Simpsons used for 3-dimensional space charge effects and a [delta]f code. The [delta]f method is used to follow the evolution of the non-gaussian part of the beam distribution. The advantages of this method are twofold. First, the Simpsons code utilizes a realistic accelerator model including synchrotron oscillations and energy ramping in 6-dimensional phase space with electromagnetic fields of the beams calculated using a realistic 3-dimensional field solver. Second, the beams are evolving in the fully self-consistent strong-strong sense where finite particle fluctuation noise is greatly reduced as opposed to the weak-strong models where one beam is fixed.

  10. Three dimensional {delta}f simulations of beams in the SSC

    Energy Technology Data Exchange (ETDEWEB)

    Koga, J.; Tajima, T. [Texas Univ., Austin, TX (United States). Inst. for Fusion Studies; Machida, S. [Superconducting Super Collider Lab., Dallas, TX (United States)

    1993-02-01

    A three dimensional {delta}f strong-strong algorithm has been developed to apply to the study of such effects as space charge and beam-beam interaction phenomena in the Superconducting Super Collider (SSC). The algorithm is obtained from the merging of the particle tracking code Simpsons used for 3-dimensional space charge effects and a {delta}f code. The {delta}f method is used to follow the evolution of the non-gaussian part of the beam distribution. The advantages of this method are twofold. First, the Simpsons code utilizes a realistic accelerator model including synchrotron oscillations and energy ramping in 6-dimensional phase space with electromagnetic fields of the beams calculated using a realistic 3-dimensional field solver. Second, the beams are evolving in the fully self-consistent strong-strong sense where finite particle fluctuation noise is greatly reduced as opposed to the weak-strong models where one beam is fixed.

  11. Three dimensional δf simulations of beams in the SSC

    International Nuclear Information System (INIS)

    Koga, J.; Tajima, T.

    1993-02-01

    A three dimensional δf strong-strong algorithm has been developed to apply to the study of such effects as space charge and beam-beam interaction phenomena in the Superconducting Super Collider (SSC). The algorithm is obtained from the merging of the particle tracking code Simpsons used for 3-dimensional space charge effects and a δf code. The δf method is used to follow the evolution of the non-gaussian part of the beam distribution. The advantages of this method are twofold. First, the Simpsons code utilizes a realistic accelerator model including synchrotron oscillations and energy ramping in 6-dimensional phase space with electromagnetic fields of the beams calculated using a realistic 3-dimensional field solver. Second, the beams are evolving in the fully self-consistent strong-strong sense where finite particle fluctuation noise is greatly reduced as opposed to the weak-strong models where one beam is fixed

  12. Three dimensional [delta][ital f] simulations of beams in the SSC

    Energy Technology Data Exchange (ETDEWEB)

    Koga, J.; Tajima, T. (Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712-1060 (United States)); Machida, S. (SSC Laboratory, 2550 Beckleymeade Avenue, Dallas, Texas 75237 (United States))

    1993-12-25

    A three dimensional [delta][ital f] strong-strong algorithm has been developed to apply to the study of such effects as space charge and beam-beam interaction phenomena in the Superconducting Super Collider (SSC). The algorithm is obtained from the merging of the particle tracking code Simpsons used for 3 dimensional space charge effects and a [delta][ital f] code. The [delta][ital f] method is used to follow the evolution of the non-gaussian part of the beam distribution. The advantages of this method are twofold. First, the Simpsons code utilizes a realistic accelerator model including synchrotron oscillations and energy ramping in 6 dimensional phase space with electromagnetic fields of the beams calculated using a realistic 3 dimensional field solver. Second, the beams are evolving in the fully self-consistent strong-strong sense with finite particle fluctuation noise is greatly reduced as opposed to the weak-strong models where one beam is fixed.

  13. Prospects for polarization at RHIC and SSC

    International Nuclear Information System (INIS)

    Lee, S.Y.

    1991-01-01

    In low to medium energy accelerators, betatron tune jumps and vertical orbit harmonic correction methods have been used to overcome the intrinsic and imperfection resonances. At high energy accelerators, snakes are needed to preserve polarization. We analyze the effects of snake resonances, snake imperfections overlapping resonances on the spin depolarization. We discuss also results of recent snake experiments at the IUCF Cooler Ring. The snake can overcome various kinds of spin depolarization resonances. These experiments pointed out further that partial snake can be used to cure the imperfection resonances in low to medium energy accelerators. We also examine various snake designs. A new generalized snake concept allows for two possible configurations. The compact configuration offers the advantages of shorter total snake length and smaller horizontal orbit displacement. The split snake configuration allows for dual functions of a snake and a 90 degree spin rotator at the mid-section of the snake, which provides helicity state collisions. The requirements for obtaining high luminosity polarized protons at high energy colliders, such as RHIC and SSC, are reviewed

  14. Field measuring probe for SSC magnets

    International Nuclear Information System (INIS)

    Ganetis, G.; Herrera, J.; Hogue, R.; Skaritka, J.; Wanderer, P.; Willen, E.

    1987-01-01

    The field probe developed for measuring the field in SSC dipole magnets is an adaptation of the rotating tangential coil system in use at Brookhaven for several years. Also known as the MOLE, it is a self-contained room-temperature mechanism that is pulled through the aperture of the magnet with regular stops to measure the local field. Several minutes are required to measure the field at each point. The probe measures the multipole components of the field as well as the field angle relative to gravity. The sensitivity of the coil and electronics is such that the field up to the full 6.6 T excitation of the magnet as well as the field when warm with only 0.01 T excitation can be measured. Tethers are attached to both ends of the probe to carry electrical connections and to supply dry nitrogen to the air motors that rotate the tangential windings as well as the gravity sensor. A small computer is attached to the probe for control and for data collection, analysis and storage

  15. Improved cable insulation for superconducting magnets

    International Nuclear Information System (INIS)

    Anerella, M.; Ghosh, A.K.; Kelly, E.; Schmalzle, J.; Willen, E.; Fraivillig, J.; Ochsner, J.; Parish, D.J.

    1993-01-01

    Several years ago, Brookhaven joined with DuPont in a cooperative effort to develop improved cable insulation for SSC superconducting dipole magnets. The effort was supported by the SSC Central Design Group and later the SSC Laboratory. It was undertaken because turn-to-turn and midplane shorts were routinely being experienced during the assembly of magnets with coils made of the existing Kapton/fiberglass (K/FG) system of Kapton film overwrapped with epoxy-impregnated fiberglass tape. Dissection of failed magnets showed that insulation disruption and punch-through was occurring near the inner edges of turns close to the magnet midplane. Coil pressures of greater than 17 kpsi were sufficient to disrupt the insulation at local high spots where the cable had been strongly compacted in the keystoning operation during cable manufacture. In the joint development program, numerous combinations of polyimide films manufactured by DuPont with varying configurations and properties (including thickness) were subjected to tests at Brookhaven. Early tests were bench trials using wrapped cable samples. The most promising candidates were used in coils and many of these promising candidates were used in coils and many of these assembled and tested as magnets in both the SSC and RHIC magnet programs currently underway. The Kapton CI (CI) system that has been adopted represents a suitable compromise of numerous competing factors. It exhibits improved performance in the critical parameter of compressive punch-through resistance as well as other advantages over the K/FG system

  16. Improved cable insulation for superconducting magnets

    International Nuclear Information System (INIS)

    Anerella, M.; Ghosh, A.K.; Kelly, E.; Schmalzle, J.; Willen, E.; Fraivillig, J.; Ochsner, J.; Parish, D.J.

    1993-01-01

    Several years ago, Brookhaven joined with DuPont in a cooperative effort to develop improved cable insulation for SSC superconducting dipole magnets. The effort was supported by the SSC Central Design Group and later the SSC Laboratory. It was undertaken because turn-to-turn and midplane shorts were routinely being experienced during the assembly of magnets with coils made of the existing Kapton/Fiberglass (K/FG) system of Kapton film overwrapped with epoxy-impregnated fiberglass tape. Dissection of failed magnets showed that insulation disruption and punch-through was occurring near the inner edges of turns close to the magnet midplane. Coil pressures of greater than 17 kpsi were sufficient to disrupt the insulation at local high spots where wires in neighboring turns crossed one another and where the cable had been strongly compacted in the keystoning operation during cable manufacture. In the joint development program, numerous combinations of polyimide films manufactured by DuPont with varying configurations and properties (including thickness) were subjected to tests at Brookhaven. Early tests were bench trials using wrapped cable samples. The most promising candidates were used in coils and many of these assembled and tested as magnets in both the SSC and RHIC magnet programs currently underway. The Kapton CI (CI) system that has been adopted represents a suitable compromise of numerous competing factors. It exhibits improved performance in the critical parameter of compressive punch-through resistance as well as other advantages over the K/FG system

  17. Cryogenic systems for the SSC and the status of their development

    International Nuclear Information System (INIS)

    Fietz, W.A.; Ganni, V.; Abramovich, S.; Niehaus, T.

    1993-07-01

    The Superconducting Super Collider (SSC) consists of two parallel magnet rings, each 87,120 m in circumference, constructed in a tunnel 25 to 74 m underground. Protons are injected into these ring from the high energy booster (HEB), which contains a separate magnet ring 10,800 m in circumference constructed in a tunnel 14 m above the collider tunnel. The magnets will be operated at a controlled low temperature in order to maintain the windings in the superconducting state. Therefore the magnet cryostat is designed with a high vacuum insulating chamber, multilayer insulation (MLI), and thermal shields at 84 K and 20 K nominal temperatures. The major portion of the heat load is from thermal radiation and conduction through the supports, and is intercepted and absorbed by the shields. The cryogenic system for the machine is divided into sectors of nominally equal length: ten for the collider and two for the HEB. Each sector has a dedicated cryogenic system (SCS) as well as some level of redundancy from the neighboring SCS. The helium refrigeration plants will be installed at the midpoint of each sector. Each cryogenic sector in the collider is divided into four strings, two upper and two lower, about 4000 m long. Each string is subdivided into sections of about 1080 m, the smallest modules that can be isolated for maintenance, or for warmup and cooldown. Each section is subdivided into cells and half cells. The half cell, containing six main magnets and a spool piece is 90 m long. The SSC cryogenic system for each sector consists of a sector refrigerator surface system (SRS) and a sector refrigerator tunnel system (SRT). Proposals for the SRS systems' are presently in review for vendor selection. In this paper the SRT subsystems requirements and their status will be reviewed

  18. Heavy neutrinos and new bosons at the SSC

    International Nuclear Information System (INIS)

    Kayser, B.; Deshpande, N.; Gunion, J.F.

    1984-01-01

    Methods for seeking and studying heavy neutrinos and new W bosons at the SSC are considered. Such particles are predicted by left-right symmetric models. Their properties and experimental signatures are analyzed. 25 refs., 5 figs

  19. Orbit correction system for the SSC interaction regions

    International Nuclear Information System (INIS)

    Nosochkov, Y.; Pilat, F.; Ritson, D.M.

    1994-01-01

    In this paper we review our design of the orbit correction system for the SSC interaction regions, and discuss the principles of the local orbit correction at the IP. copyright 1994 American Institute of Physics

  20. Superconductivity revisited

    CERN Document Server

    Dougherty, Ralph

    2013-01-01

    While the macroscopic phenomenon of superconductivity is well known and in practical use worldwide in many industries, including MRIs in medical diagnostics, the current theoretical paradigm for superconductivity (BCS theory) suffers from a number of limitations, not the least of which is an adequate explanation of high temperature superconductivity. This book reviews the current theory and its limitations and suggests new ideas and approaches in addressing these issues. The central objective of the book is to develop a new, coherent, understandable theory of superconductivity directly based on molecular quantum mechanics.

  1. SSC-K code user's manual

    Energy Technology Data Exchange (ETDEWEB)

    Kwon, Y.M.; Lee, Y.B.; Chang, W.P.; Hahn, D

    2000-07-01

    The Supper System Code of KAERI (SSC-K) is a best-estimate system code for analyzing a variety of off-normal or accidents in the heat transport system of a pool type LMR design. It is being developed at Korea Atomic Energy Research Inititution (KAERI) on the basis of SSC-L, originally developed at BNL to analyze loop-type LMR transients. SSC-K can handle both designs of loop and pool type LMRs. SSC-K contains detailed mechanistic models of transient thermal, hydraulic, neutronic, and mechanical phenomena to describe the response of the reactor core, coolant, fuel elements, and structures to accident conditions. This report provides an overview of recent model developmentsvfor the SSC-K computer code, focusing on phenomenological model descriptions for new thermal, hydraulic, neutronic, and mechnaical modules. A comprehensive description of the models for pool-type reactor is given in Chapters 2 and 3; the steady-state plant characterization, prior to the initiation of transient is described in Chapter 2 and their transient counterparts are discussed in Chapter 3. In Chapter 4, a discussion on the intermediate heat exchanger (IHX) is presented. The IHX model of SSC-K is similar to that used in the SSC-L, except for some changes required for the pool-type configuration of reactor vessel. In Chapter 5, an electromagnetic (EM) pump is modeled as a component. There are two pump choices available in SSC-K; a centrifugal pump which was originally imbedded into the SSC-L, and an EM pump which was introduced for the KALIMER design. In Chapter 6, a model of passive safety decay heat removal system(PSDRS) is discussed, which removes decay heat through the reactor and containment vessel walls to the ambient air heat sink. In Chapter 7, models for various reactivity feedback effects are discussed. Reactivity effects of importance in fast reactor include the Doppler effect, effects of sodium density changes, effects of dimensional changes in core geometry. Finally in Chapter 8

  2. SSC-K code users manual (rev.1)

    International Nuclear Information System (INIS)

    Kwon, Y. M.; Lee, Y. B.; Chang, W. P.; Hahn, D.

    2002-01-01

    The Supper System Code of KAERI (SSC-K) is a best-estimate system code for analyzing a variety of off-normal or accidents in the heat transport system of a pool type LMR design. It is being developed at Korea Atomic Energy Research Institution (KAERI) on the basis of SSC-L, originally developed at BNL to analyze loop-type LMR transients. SSC-K can handle both designs of loop and pool type LMRs. SSC-K contains detailed mechanistic models of transient thermal, hydraulic, neutronic, and mechanical phenomena to describe the response of the reactor core, coolant, fuel elements, and structures to accident conditions. This report provides a revised User's Manual (rev.1) of the SSC-K computer code, focusing on phenomenological model descriptions for new thermal, hydraulic, neutronic, and mechanical modules. A comprehensive description of the models for pool-type reactor is given in Chapters 2 and 3; the steady-state plant characterization, prior to the initiation of transient is described in Chapter 2 and their transient counterparts are discussed in Chapter 3. Discussions on the intermediate heat exchanger (IHX) and the electromagnetic (EM) pump are described in Chapter 4 and 5, respectively. A model of passive safety decay heat removal system (PSDRS) is discussed in Chapter 6, and models for various reactivity feedback effects are discussed in Chapter 7. In Chapter 8, constitutive laws and correlations required to execute the SSC-K are described. New models developed for SSC-K rev.1 are two dimensional hot pool model in Chapter 9, and long term cooling model in Chapter 10. Finally, a brief description of MINET code adopted to simulate BOP is presented in Chapter 11. Based on test runs for typical LMFBR accident analyses, it was found that the present version of SSC-K would be used for the safety analysis of KALIMER. However, the further validation of SSC-K is required for real applications. It is noted that the user's manual of SSC-K will be revised later with the

  3. Tracking simulation and wire chamber requirements for the SSC

    International Nuclear Information System (INIS)

    Hanson, G.G.; Niczyporuk, B.B.; Palounek, A.P.T.

    1988-11-01

    Limitations placed on wire chambers by radiation damage and rate requirements in the SSC environment are reviewed. Possible conceptual designs for wire chamber tracking systems which meet these requirements are discussed. Computer simulation studies of tracking in such systems are presented. Simulations of events from interesting physics at the SSC, including hits from minimum bias background events, are examined. Results of some preliminary pattern recognition studies are given. 16 refs., 16 figs., 2 tabs

  4. Superconducting cermets

    International Nuclear Information System (INIS)

    Goyal, A.; Funkenbusch, P.D.; Chang, G.C.S.; Burns, S.J.

    1988-01-01

    Two distant classes of superconducting cermets can be distinguished, depending on whether or not a fully superconducting skeleton is established. Both types of cermets have been successfully fabricated using non-noble metals, with as high as 60wt% of the metal phase. The electrical, magnetic and mechanical behavior of these composites is discussed

  5. Superconducting technology

    International Nuclear Information System (INIS)

    2010-01-01

    Superconductivity has a long history of about 100 years. Over the past 50 years, progress in superconducting materials has been mainly in metallic superconductors, such as Nb, Nb-Ti and Nb 3 Sn, resulting in the creation of various application fields based on the superconducting technologies. High-T c superconductors, the first of which was discovered in 1986, have been changing the future vision of superconducting technology through the development of new application fields such as power cables. On basis of these trends, future prospects of superconductor technology up to 2040 are discussed. In this article from the viewpoints of material development and the applications of superconducting wires and electronic devices. (author)

  6. Interface superconductivity

    Energy Technology Data Exchange (ETDEWEB)

    Gariglio, S., E-mail: stefano.gariglio@unige.ch [DQMP, Université de Genève, 24 Quai E.-Ansermet, CH-1211 Genève (Switzerland); Gabay, M. [Laboratoire de Physique des Solides, Bat 510, Université Paris-Sud 11, Centre d’Orsay, 91405 Orsay Cedex (France); Mannhart, J. [Max Planck Institute for Solid State Research, 70569 Stuttgart (Germany); Triscone, J.-M. [DQMP, Université de Genève, 24 Quai E.-Ansermet, CH-1211 Genève (Switzerland)

    2015-07-15

    Highlights: • We discuss interfacial superconductivity, a field boosted by the discovery of the superconducting interface between LaAlO. • This system allows the electric field control and the on/off switching of the superconducting state. • We compare superconductivity at the interface and in bulk doped SrTiO. • We discuss the role of the interfacially induced Rashba type spin–orbit. • We briefly discuss superconductivity in cuprates, in electrical double layer transistor field effect experiments. • Recent observations of a high T{sub c} in a monolayer of FeSe deposited on SrTiO{sub 3} are presented. - Abstract: Low dimensional superconducting systems have been the subject of numerous studies for many years. In this article, we focus our attention on interfacial superconductivity, a field that has been boosted by the discovery of superconductivity at the interface between the two band insulators LaAlO{sub 3} and SrTiO{sub 3}. We explore the properties of this amazing system that allows the electric field control and on/off switching of superconductivity. We discuss the similarities and differences between bulk doped SrTiO{sub 3} and the interface system and the possible role of the interfacially induced Rashba type spin–orbit. We also, more briefly, discuss interface superconductivity in cuprates, in electrical double layer transistor field effect experiments, and the recent observation of a high T{sub c} in a monolayer of FeSe deposited on SrTiO{sub 3}.

  7. Field generated within the SSC magnets due to persistant currents in the superconductor

    International Nuclear Information System (INIS)

    Green, M.A.

    1984-01-01

    This report presents the results of a number of computer studies of the magnetic fields generated by persistent circulating currents in the superconductor of superconducting dipoles. These magnetic fields are referred to as residual fields throughout this report. Since the field generated by persistent currents have a hysteric behavior, they are analagous to the residual filed found in iron bound conventional solenoids. The residual field calculations presented in this report were done using the LBL SCMAG4 computer code. This code has not been well tested against measured data, but a comparison with measured CBA data given in this report suggests that good agreement is possible. The residual fields generated by persistent superconducting currents are rich in higher multipoles. This is of concern to the accelerator designer for SSC. This report shows the effect of various superconductor parameters and coil parameters on the magnitude and structure of the residual fields. The effect of the magnet charging history on residual fields is aldo discussed. 14 references

  8. Organic superconductivity

    International Nuclear Information System (INIS)

    Jerome, D.

    1980-01-01

    We present the experimental evidences for the existence of a superconducting state in the Quasi One Dimensional organic conductor (TMTSF) 2 PF 6 . Superconductivity occuring at 1 K under 12 kbar is characterized by a zero resistance diamagnetic state. The anistropy of the upper critical field of this type II superconductor is consistent with the band structure anistropy. We present evidences for the existence of large superconducting precursor effects giving rise to a dominant paraconductive contribution below 40 K. We also discuss the anomalously large pressure dependence of T sb(s), which drops to 0.19 K under 24 kbar in terms of the current theories. (author)

  9. Superconducting linac

    International Nuclear Information System (INIS)

    Bollinger, L.M.; Shepard, K.W.; Wangler, T.P.

    1978-01-01

    This project has two goals: to design, build, and test a small superconducting linac to serve as an energy booster for heavy ions from an FN tandem electrostatic accelerator, and to investigate various aspects of superconducting rf technology. The main design features of the booster are described, a status report on various components (resonators, rf control system, linac control system, cryostats, buncher) is given, and plans for the near future are outlined. Investigations of superconducting-linac technology concern studies on materials and fabrication techniques, resonator diagnostic techniques, rf-phase control, beam dynamics computer programs, asymmetry in accelerating field, and surface-treatment techniques. The overall layout of the to-be-proposed ATLAS, the Argonne Tandem-Linac Accelerator System, is shown; the ATLAS would use superconducting technology to produce beams of 5 to 25 MeV/A. 6 figures

  10. Superconducting materials

    International Nuclear Information System (INIS)

    Kormann, R.; Loiseau, R.; Marcilhac, B.

    1989-01-01

    The invention concerns superconducting ceramics containing essentially barium, calcium and copper fluorinated oxides with close offset and onset temperatures around 97 K and 100 K and containing neither Y nor rare earth [fr

  11. Hole superconductivity

    International Nuclear Information System (INIS)

    Hirsch, J.E.; Marsiglio, F.

    1989-01-01

    The authors review recent work on a mechanism proposed to explain high T c superconductivity in oxides as well as superconductivity of conventional materials. It is based on pairing of hole carriers through their direct Coulomb interaction, and gives rise to superconductivity because of the momentum dependence of the repulsive interaction in the solid state environment. In the regime of parameters appropriate for high T c oxides this mechanism leads to characteristic signatures that should be experimentally verifiable. In the regime of conventional superconductors most of these signatures become unobservable, but the characteristic dependence of T c on band filling survives. New features discussed her include the demonstration that superconductivity can result from repulsive interactions even if the gap function does not change sign and the inclusion of a self-energy correction to the hole propagator that reduces the range of band filling where T c is not zero

  12. Characterization and Modeling of Superconducting Josephson Junction Arrays at Low Voltage and Liquid Helium Temperatures

    Science.gov (United States)

    2016-09-01

    both from SSC Pacific) and Marc Tukeman, Chuck Vinson and Mr. Mark Flemon with the procurement process . We acknowledge Deep Gupta, Saad Sarwana, and...superconductor-ionic quantum memory and computation devices. iv CONTENTS EXECUTIVE SUMMARY...Josephson effect makes these measurements useful for characterization and calibration of superconducting quantum memory and computational devices

  13. The Super Fixed Target beauty facility at the SSC

    International Nuclear Information System (INIS)

    Lau, Kwong

    1991-01-01

    The rationale for pursuing beauty physics at the SSC in a fixed target configuration is described. The increased beauty production cross section at the SSC, combined with high interaction rate capability of the proposed detector, results in 10 10-11 produced BB events per year. The long decay length of the B hadrons (≅ 10 cm) allows direct observation of B decays in the high resolution silicon microstrip vertex detector. To optimize the operation of the proposed beauty spectrometer and the SSC, parasitic extraction of attendant or artificially generated large amplitude protons using crystal channeling is proposed and explored. The large sample of fully reconstructed B events allows detailed studies of various CP violating decays with requisite statistics to confront the standard model. The CP physics potential of the proposed experiment is evaluated and compared with alternative approaches, such as symmetric e + e - B Factories and specialized hadron colliders

  14. SSC RIAR is the largest centre of research reactors

    International Nuclear Information System (INIS)

    Kalygin, V.V.

    1997-01-01

    The State Scientific Centre (SSC) ''Research Institute of Atomic Reactors'' (RIAR) is situated 100 km to the south-east from Moscow, in Dimitrovgrad, the Volga Region of the Russian Federation. SSC RIAR is the largest centre of research reactors in Russia. At present there are 5 types of reactor facilities in operation, including two NPP. One of the main tasks the Centre is the investigations on safety increase for power reactors. Broad international connections are available at the Institute. On the basis of the SSC RIAR during 3 years work has been done on the development of the branch training centre (TC) for the training of operation personnel of research and pilot reactors in Russia. (author). 3 tabs

  15. SSC RIAR is the largest centre of research reactors

    Energy Technology Data Exchange (ETDEWEB)

    Kalygin, V V [State Scientific Centre, Research Inst. of Atomic Reactors (Russian Federation)

    1997-10-01

    The State Scientific Centre (SSC) ``Research Institute of Atomic Reactors`` (RIAR) is situated 100 km to the south-east from Moscow, in Dimitrovgrad, the Volga Region of the Russian Federation. SSC RIAR is the largest centre of research reactors in Russia. At present there are 5 types of reactor facilities in operation, including two NPP. One of the main tasks the Centre is the investigations on safety increase for power reactors. Broad international connections are available at the Institute. On the basis of the SSC RIAR during 3 years work has been done on the development of the branch training centre (TC) for the training of operation personnel of research and pilot reactors in Russia. (author). 3 tabs.

  16. An engineering design network for SSC detector development

    International Nuclear Information System (INIS)

    DiGiacomo, N.J.

    1990-01-01

    The detector systems that are being proposed to exploit the capabilities of the SSC are of a scale and scope that will make them among the most complex devices ever built. To successfully design and build these systems over the next decade, the authors must make use of integrated state of the art computer aided engineering and design (CAE/CAD) tools that have been developed and employed in industry. The challenge is to made these tools and associated engineering resources available to the spectrum of institutions - large and small universities, industries and national labs - involved in SSC detector development in such a way that each may contribute and participate in the most effective manner. The authors believe that powerful workstations running sophisticated modeling, analysis and simulation software, linked by high speed data networks and governed by modern configuration management methods offer the ideal means of arriving at the optimum detector configuration for physics at the SSC

  17. A high gradient quadrupole magnet for the SSC

    International Nuclear Information System (INIS)

    Taylor, C.; Caspi, S.; Helm, M.; Mirk, K.; Peters, C.; Wandesforde, A.

    1987-01-01

    A quadrupole magnet for the SSC has been designed with a gradient of 234 T/m at 6500 A. Coil I.D. is 40 mm. The two-layer windings have 9 inner turns and 13 outer turns per pole with a wedge-shaped space in each layer. The 30-strand cable is identical to that used in the outer layer of the SSC dipole magnet. Interlocking aluminum alloy collars are compressed around the coil using a four-way press and are locked with four keys. The collared coil is supported and centered in a cold split iron yoke. A one-meter model was constructed and tested. Design details including quench behavior are presented. The quadrupole magnets proposed for the main SSC rings have a design gradient of 230 T/m. For one proposed 60 degree lattice cell, each 3-m long quad is separated by five 17-m long dipole magnets

  18. Superconducted tour

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1988-09-15

    Superconductivity - the dramatic drop in electrical resistance in certain materials at very low temperatures - has grown rapidly in importance over the past two or three decades to become a key technology for high energy particle accelerators. It was in this setting that a hundred students and 15 lecturers met in Hamburg in June for a week's course on superconductivity in particle accelerators, organized by the CERN Accelerator School and the nearby DESY Laboratory.

  19. Superconductivity: Phenomenology

    International Nuclear Information System (INIS)

    Falicov, L.M.

    1988-08-01

    This document discusses first the following topics: (a) The superconducting transition temperature; (b) Zero resistivity; (c) The Meissner effect; (d) The isotope effect; (e) Microwave and optical properties; and (f) The superconducting energy gap. Part II of this document investigates the Ginzburg-Landau equations by discussing: (a) The coherence length; (b) The penetration depth; (c) Flux quantization; (d) Magnetic-field dependence of the energy gap; (e) Quantum interference phenomena; and (f) The Josephson effect

  20. On the design of fully-integrated charge preamplifiers for the Superconducting Super Collider

    International Nuclear Information System (INIS)

    VanPeteghem, P.M.; Ling, K.Y.; Lee, S.Y.; Liu, H.H.; DiBitonto, D.

    1990-01-01

    The specifications imposed on the charge preamplifiers, to be used in the Superconducting Supercollider are very demanding: the rise time should be less than 100 nsec and noise should be less than 1,000 electrons RMS for a total power consumption of less than 80 mWatt. Furthermore, several hundreds of thousands (or even millions) of channels have to be manufactured. Hence, integrated circuit (IC) implementations can be more economical than discrete implementations, due to the compact size and ease of manufacturing. BiFET IC technology is currently the most attractive technology, because it is a mature IC technology, and readily available from several industrial vendors. As a case study, a BiFET prototype preamplifier is presented, where circuit performance has been tested for total radiation doses up to 1.4 MegaRads

  1. SSC Tenant Meeting: NASA Near Earth Network (NEN) Overview

    Science.gov (United States)

    Carter, David; Larsen, David; Baldwin, Philip; Wilson, Cristy; Ruley, LaMont

    2018-01-01

    The Near Earth Network (NEN) consists of globally distributed tracking stations that are strategically located throughout the world which provide Telemetry, Tracking, and Commanding (TTC) services support to a variety of orbital and suborbital flight missions, including Low Earth Orbit (LEO), Geosynchronous Earth Orbit (GEO), highly elliptical, and lunar orbits. Swedish Space Corporation (SSC), which is one of the NEN Commercial Service Provider, has provided the NEN with TTC services support from its Alaska, Hawaii, Chile and Sweden. The presentation will give an overview of the NEN and its support from SSC.

  2. Tevatron as an SSC prototype; experience versus predictions

    International Nuclear Information System (INIS)

    Johnson, R.P.

    1984-01-01

    Early machine experiments on the Tevatron which are relevant to the SSC are discussed. Despite the preliminary nature of the data, there have been some interesting observations which may influence the design of the SSC. In particular, comparisons of measured betatron tunes, chromaticities, and resonance line widths with those predicted from computer simulations using magnetic field measurements have been made; the predictability for low order phenomena seems acceptable. Coasting beam studies indicate long lifetime and lack of strong resonance driving terms. Low energy studies of beam behavior indicate that a dynamic range of a factor of 15 from injection to operation energy should be possible

  3. EMPACT: An alternative approach to a high PT SSC experiment

    International Nuclear Information System (INIS)

    Marx, M.; State Univ. of New York, Stony Brook, NY

    1989-05-01

    A survey of high P T detector concepts advanced for the SSC reveals two striking facts -- first, the scale of most detectors is set by the muon detection system; and second, that the performance of these muon systems is limited in comparison to electron or jet capabilities, either in resolution or in rapidity acceptance. I propose here an alternative concept for an SSC experiment which will provide enhanced muon performance at a level to that obtainable through calorimetric means for electrons and jets, while drastically reducing the tonnage of the experiment

  4. Full length SSC R and D dipole magnet test results

    International Nuclear Information System (INIS)

    Strait, J.; Bleadon, M.; Brown, B.C.

    1989-03-01

    Four full scale SSC development dipole magnets have been tested for mechanical and quench behavior. Two are of a design similar to previous magnets but contain a number of improvements, including more uniform coil size, higher pre-stress and a redesigned inner-outer coil splice. One exceeds the SSC operating current on the second quench but the other appears to be limited by damaged superconductor to a lower current. The other two magnets are of alternate designs. One trains erratically and fails to reach a plateau and the other reaches plateau after four quenches. 12 refs., 4 figs

  5. Fixed target beauty physics from Tevatron to SSC (E771)

    International Nuclear Information System (INIS)

    Lau, K.

    1992-01-01

    The E771 beauty experiment at Fermilab is described. The Super Fixed Target Beauty Facility (SFT) proposal to perform fixed target beauty physics at the SSC is a natural evolution. The unique features of SFT include crystal channeling extraction from the SSC main ring, which allows the experiment to operate concurrently with the collider experiments. The slow extraction rate (≅2x10 8 protons/s) does not limit the lifetime of the stored beams. The proposed beauty spectrometer and its capability in CP violation studies are described. (author) 19 refs.; 2 figs.; 2 tabs

  6. What the quality philosophy brings to a research and development environment like the SSC

    International Nuclear Information System (INIS)

    Davis, S.; Wentz, J.

    1993-04-01

    In achieving major schedule and performance milestones with a project as technologically advanced as the Superconducting Super Collider, many activities must be coordinated simultaneously without the luxury of a conventional design review process. Because the design may change several times prior to the delivery of a one-of-a-kind or prototype component or subsystem, close verification and monitoring of design, manufacturing and test processes are needed on a real-time basis. This verification and monitoring is performed on two levels by Quality Assurance at the SSC Laboratory; Division and General Management. The Division level is involved in day-today activities at the Laboratory and the Suppliers; the General Management level performs the independent oversight function for all the Laboratory quality processes. In the divisions, continuous monitoring of design, procurement, manufacturing, installation, and testing activities is performed. At the General Management level, quality program development and implementation is evaluated within each division. Critical suppliers involved in system design, manufacturing, and testing are evaluated against contract and program requirements to assure systems safely perform their intended functions. Responsibilities for quality are extended by the participation of the SSCL Quality Assurance Office in Accelerator Readiness Reviews (ARR) previously known as Operational Readiness Reviews (ORR) for each major machine developed and designed at the Laboratory. Quality Assurance promoted continuous awareness of DOE contract requirements, SSC Laboratory Quality Assurance requirements and the Safety Analysis Report requirements which is not an easy task in the scientific community. A result has been a new cooperative attitude in which physicists, scientists, engineers, safety and quality professionals can work together towards a common goal

  7. An assessment of the SSC impact on the training and employment needs of North Central Texas

    International Nuclear Information System (INIS)

    Orsak, C.G.; McGlohen, P.; Jenkens, L.

    1992-01-01

    The Texas Higher Education Coordinating Board has funded the Navarro College/Dallas County Community College Districe SSC Technical Training Project to determine the direct and inderect manpower needs in the eighteen-county North Cenbtral Texas area surrounding the Superconducting Super Collider Laboratory (SSCL) and to identify training programs to be developed by local community colleges. The tasks of this project were specifically designed to maximize the use of existing informatiion resources of various organizations and agencies concerned with lobor force development issues to provide custom databases focusied upon the SSCL. The labor market informataion (LMI) resources developed in this project provide a strong foundation for examining the impacts of the SSCL on the training and employment needs of the North Central Texas region. The direct and indirect effects of the SSCL are analyzed to the smallest level of occupational detail feasible. Regional labor demand estimates and forecasts were updated and expanded, county level demand data was developed, statewide vocational education programs were inventoried and lists of affected regional employers were extracted. All of the data developed in this project is available in standard Dbase disk files, formatted to be compatible with other LMI resources such as INTERLINK's LMIS. Further, a custom version of INTERLINK's PC-based LMIS software was developed for the SSC Technical Training Project to provide the greatest access to and linkage between the labor demand and supply data developed in this study. Future efforts to develop additional information resources relevant to the event of the SSCL must focus upon comparative analyses of similar projects, such as Fermilab and others, to provide more detail to the products developed in this project

  8. The Superconducting Super Collider: A status report

    International Nuclear Information System (INIS)

    Schwitters, R.F.

    1993-04-01

    The design of the Superconducting Super Collider (SSC) is briefly reviewed, including its key machine parameters. The scientific objectives are twofold: (1) investigation of high-mass, low-rate, rare phenomena beyond the standard model; and (2) investigation of processes within the domain of the standard model. Machine luminosity, a key parameter, is a function of beam brightness and current, and it must be preserved through the injector chain. Features of the various injectors are discussed. The superconducting magnet system is reviewed in terms of model magnet performance, including the highly successful Accelerator System String Test Various magnet design modifications are noted, reflecting minor changes in the collider arcs and improved installation procedures. The paper concludes with construction scenarios and priority issues for ensuring the earliest collider commissioning

  9. Searching for quark and lepton compositeness at the SSC

    International Nuclear Information System (INIS)

    Albright, C.H.; Bars, I.; Blumenfeld, B.

    1984-01-01

    We examine a variety of issues connected with searching for compositeness at the SSC. These include effects of resolution, alternative methods of looking for deviations from QCD predictions, advantages of polarized beams, and effects of compositeness on photon detection. We also consider how physics may look if the compositeness scale is as low as a few TeV. 17 refs

  10. Calculation of injection and extraction orbits for the IPCR SSC

    International Nuclear Information System (INIS)

    Goto, A.; Yano, Y.; Kishida, N.; Nakanishi, N.; Wada, T.

    1982-01-01

    Calculations of beam trajectories in the injection and extraction systems for the IPCR SSC were done and the characteristics of those elements were determined. Beam centering for single turn extraction by use of first harmonic fields were also studied. The rather simple conditions at the injection point for a well-centered acceleration orbit are also discussed

  11. Fermilab R and D test facility for SSC magnets

    International Nuclear Information System (INIS)

    Strait, J.; Bleadon, M.; Hanft, R.; Lamm, M.; McGuire, K.; Mantsch, P.; Mazur, P.O.; Orris, D.; Pachnik, J.

    1989-01-01

    The test facility used for R and D testing of full scale development dipole magnets for the SSC is described. The Fermilab Magnet Test Facility, originally built for production testing of Tevatron magnets, has been substantially modified to allow testing also of SSC magnets. Two of the original six test stands have been rebuilt to accommodate testing of SSC magnets at pressures between 1.3 Atm and 4 Atm and at temperatures between 1.8 K and 4.8 K and the power system has been modified to allow operation to at least 8 kA. Recent magnets have been heavily instrumented with voltage taps to allow detailed study of quench location and propagation and with strain gage based stress, force and motion transducers. A data acquisition system has been built with a capacity to read from each SSC test stand up to 220 electrical quench signals, 32 dynamic pressure, temperature and mechanical transducer signals during quench and up to 200 high precision, low time resolution, pressure, temperature and mechanical transducer signals. The quench detection and protection systems is also described. 23 refs., 4 figs. 2 tabs

  12. Probing the non-minimal Higgs sector at the SSC

    International Nuclear Information System (INIS)

    Gunion, J.F.; Haber, H.E.; Komamiya, S.; Yamamoto, H.; Barbaro-Galtieri, A.

    1987-11-01

    Non-minimal Higgs sectors occur in the Standard Model with more than one Higgs doublet, as well as in theories that go beyond the Standard Model. In this report, we discuss how Higgs search strategies must be altered, with respect to the Standard Model approaches, in order to probe the non-minimal Higgs sectors at the SSC

  13. Quench propagation across the copper wedges in SSC dipoles

    International Nuclear Information System (INIS)

    Ghosh, A.K.; Robins, K.E.; Sampson, W.B.

    1986-01-01

    The effect of copper wedges on quench propagation in SSC windings has been studied. The results indicate that the turn-to-turn quench transit time for conductors separated by an insulated copper wedge can be predicted with reasonable accuracy from the bulk quench properties and the mean wedge thickness

  14. Preaccident modeling of an LMFBR plant for SSC-L

    International Nuclear Information System (INIS)

    Agrawal, A.K.

    1976-12-01

    Physical models for various processes in preaccident or steady-state calculations for the entire liquid metal fast breeder reactor plant are described in this report. A computer program for this initialization phase was written to serve as the starting point for the transient version of the SSC-L code. All of the models and programming are applicable to the ''loop'' type plants

  15. Anti-proteinase 3 antibodies in diffuse systemic sclerosis (SSc with normotensive renal impairment: is it suggestive for an overlapping between SSc and idiopathic vasculitis?

    Directory of Open Access Journals (Sweden)

    V. Campanella

    2011-09-01

    Full Text Available Objective. To test the prevalence of anti-neutrophil cytoplasmic antibodies (ANCA in systemic sclerosis (SSc and to verify a possible association of ANCA with normotensive renal involvement in SSc. Patients and methods: 51 patients affected by SSc, 35 with diffuse scleroderma (dSSc and 16 with limited scleroderma (lSSc, were tested for ANCA by indirect immunofluorescence (IIF on human ethanol and formalin-acetone-fixed granulocytes (before and after DNase treatment, by conventional enzyme linked immuno-sorbent assay (ELISA and by capture-ELISA. Results. Six out of 51 selected SSc patients had ANCA by IIF (11.7% and five presented a perinuclear/nuclear atypical ANCA pattern. In all cases we only found anti-proteinase3 (aPR3 antibodies. All ANCA positive patients had diffuse form of SSc (17.1%, all were anti-Scl70 positive (aScl70, five patients had proteinuria, three had microscopic haematuria. All ANCA positive patients were normotensive with normal renin plasma levels, the mean erythrocyte sedimentation rate (ESR was higher in this group compared to the other SSc patients. Conclusions. Our study shows that aPR3 is not rare in dSSc. According to the clinical and serological findings and to the recent literature, we can hypothesise that when ANCA are found in SSc, an overlapping of scleroderma with systemic necrotizing vasculitis should be suspected.

  16. Superconducting cyclotrons

    International Nuclear Information System (INIS)

    Blosser, H.G.; Johnson, D.A.; Burleigh, R.J.

    1976-01-01

    Superconducting cyclotrons are particularly appropriate for acceleration of heavy ions. A review is given of design features of a superconducting cyclotron with energy 440 (Q 2 /A) MeV. A strong magnetic field (4.6 tesla average) leads to small physical size (extraction radius 65 cm) and low construction costs. Operating costs are also low. The design is based on established technology (from present cyclotrons and from large bubble chambers). Two laboratories (in Chalk River, Canada and in East Lansing, Michigan) are proceeding with construction of full-scale prototype components for such cyclotrons

  17. Cooling water for SSC experiments: Supplemental Conceptual Design Report (SCDR)

    International Nuclear Information System (INIS)

    Doyle, R.E.

    1989-01-01

    This paper discusses the following topics on cooling water design on the superconducting super collider; low conductivity water; industrial cooling water; chilled water systems; and radioactive water systems

  18. Electroweak and flavor physics: Implications for the SSC. Second annual SSCL spring conference

    International Nuclear Information System (INIS)

    1991-01-01

    This book is a collection of vugraphs for the papers given at the conference. The following topics are covered: neutrino physics and dark matter; solar neutrinos; kaon decays; future prospects in high energy physics (non SSC); bottom quark physics; status and physics aims of SSC; and SSC possibilities for B physics

  19. Superconducting materials

    International Nuclear Information System (INIS)

    Ruvalds, J.

    1990-01-01

    This report discusses the following topics: Fermi liquid nesting in high temperature superconductors; optical properties of high temperature superconductors; Hall effect in superconducting La 2-x Sr x CuO 4 ; source of high transition temperatures; and prospects for new superconductors

  20. Superconducting transformer

    International Nuclear Information System (INIS)

    Murphy, J.H.

    1982-01-01

    A superconducting transformer having a winding arrangement that provides for current limitation when subjected to a current transient as well as more efficient utilization of radial spacing and winding insulation. Structural innovations disclosed include compressed conical shaped winding layers and a resistive matrix to promote rapid switching of current between parallel windings

  1. Superconducting magnets

    International Nuclear Information System (INIS)

    1994-08-01

    This report discusses the following topics on superconducting magnets: D19B and -C: The next steps for a record-setting magnet; D20: The push beyond 10 T: Beyond D20: Speculations on the 16-T regime; other advanced magnets for accelerators; spinoff applications; APC materials development; cable and cabling-machine development; and high-T c superconductor at low temperature

  2. Superconducting magnets

    International Nuclear Information System (INIS)

    Willen, E.

    1996-01-01

    Superconducting dipole magnets for high energy colliders are discussed. As an example, the magnets recently built for the Relativistic Heavy Ion Collider at Brookhaven are reviewed. Their technical performance and the cost for the industry-built production dipoles are given. The cost data is generalized in order to extrapolate the cost of magnets for a new machine

  3. Bipolar superconductivity

    International Nuclear Information System (INIS)

    Pankratov, S.G.

    1987-01-01

    A model of bipolaron superconductivity suggested by Soviet scientist Alexandrov A.S. and French scientist Ranninger is presentes in a popular way. It is noted that the bipolaron theory gives a good explanation of certain properties of new superconductors, high critical temperature, in particular

  4. Superconducting transistor

    International Nuclear Information System (INIS)

    Gray, K.E.

    1978-01-01

    A three film superconducting tunneling device, analogous to a semiconductor transistor, is presented, including a theoretical description and experimental results showing a current gain of four. Much larger current gains are shown to be feasible. Such a development is particularly interesting because of its novelty and the striking analogies with the semiconductor junction transistor

  5. Design, fabrication and testing of a 56 mm bore twin-aperture 1 m long dipole magnet made with SSC type cable

    Energy Technology Data Exchange (ETDEWEB)

    Ostler, J.; Perini, D.; Russenschuck, S.; Siegel, N.; Siemko, A.; Trinquart, G.; Walckiers, L.; Weterings, W. [CERN, Geneva (Switzerland)

    1996-07-01

    In the framework of the LHC superconducting dipole magnet model program, a 56 mm bore, twin-aperture dipole model 1 m long, using existing cables of the standard SSC type, was launched to initiate studies of lower field magnets with smaller strand size cables for a 7 TeV collider. This model was designed, built, assembled and tested at CERN and reached a peak field of 9.7 T at 1.8 K. The paper reviews the main design principles, presents the fabrication and assembly procedures and finally discusses the overall test results.

  6. Design, fabrication and testing of a 56 mm bore twin-aperture 1 m long dipole magnet made with SSC type cable

    International Nuclear Information System (INIS)

    Ostler, J.; Perini, D.; Russenschuck, S.; Siegel, N.; Siemko, A.; Trinquart, G.; Walckiers, L.; Weterings, W.

    1996-01-01

    In the framework of the LHC superconducting dipole magnet model program, a 56 mm bore, twin-aperture dipole model 1 m long, using existing cables of the standard SSC type, was launched to initiate studies of lower field magnets with smaller strand size cables for a 7 TeV collider. This model was designed, built, assembled and tested at CERN and reached a peak field of 9.7 T at 1.8 K. The paper reviews the main design principles, presents the fabrication and assembly procedures and finally discusses the overall test results

  7. Theory of superconductivity

    International Nuclear Information System (INIS)

    Crisan, M.

    1988-01-01

    This book discusses the most important aspects of the theory. The phenomenological model is followed by the microscopic theory of superconductivity, in which modern formalism of the many-body theory is used to treat most important problems such as superconducting alloys, coexistence of superconductivity with the magnetic order, and superconductivity in quasi-one-dimensional systems. It concludes with a discussion on models for exotic and high temperature superconductivity. Its main aim is to review, as complete as possible, the theory of superconductivity from classical models and methods up to the 1987 results on high temperature superconductivity. Contents: Phenomenological Theory of Superconductivity; Microscopic Theory of Superconductivity; Theory of Superconducting Alloys; Superconductors in a Magnetic Field; Superconductivity and Magnetic Order; Superconductivity in Quasi-One-Dimensional Systems; and Non-Conventional Superconductivity

  8. Full-power test of a string of magnets comprising a half-cell of the Superconducting Super Collider

    International Nuclear Information System (INIS)

    Burgett, W.; Christianson, M.; Coombes, R.

    1992-10-01

    In this paper we describe the full-powered operation of a string of industrially-fabricated magnets comprising a half-cell of the Superconducting Super Collider (SSC). The completion of these tests marks the first successful operation of a major SSC subsystem. The five 15-m long dipole magnets in the string had an aperture of 50 mm and the single 5-m long quadrupole aperture was 40 mm. Power and cryogenic connections were made to the string through spool pieces that are prototypes for SSC operations. The string was cooled to cryogenic temperatures in early July, 1992, and power tests were performed at progressively higher currents up to the nominal SSC operating point above 6500 amperes achieved in mid-August. In this paper we report on the electrical and cryogenic performance of the string components and the quench protection system during these initial tests

  9. High energy physics at the University of Iowa

    International Nuclear Information System (INIS)

    McCliment, E.R.; Mallik, U.; Newsom, C.R.; Onel, Y.

    1993-01-01

    Efforts were devoted to three tasks: a study of electron proton physics with ZEUS at HERA (the ZEUS detector, the J/ψ search, future upgrades), fixed-target experiments at Fermilab (Coulomb-nuclear interference measurement, inclusive Λ measurements, hyperon radiative decay, charmed baryon studies at CERN and at Fermilab--detector status), and R ampersand D related to Superconducting Supercollider (SSC) detector development with the GEM collaboration

  10. Thermal performance measurements of a graphite tube compact cryogenic support for the Superconducting Super Collider

    International Nuclear Information System (INIS)

    Gonczy, J.D.; Boroski, W.N.; Larson, E.T.; Nicol, T.H.; Niemann, R.C.; Otavka, J.G.; Ruschman, M.K.

    1988-12-01

    The magnet cryostat development program for the Superconducting Super Collider (SSC) High Energy Physics Proton-Proton Collider has produced an innovative design for the structural support of the cold mass and thermal radiation shields. This work updates the continuing development of the support known as the Compact Cryogenic Support (CCS). As the structural and thermal requirements of the SSC became better defined, a CCS was developed that employs an innermost tube comprised of a graphite composite material. Presented is the thermal performance to 4.5K of the graphite CCS model. 8 refs., 6 figs., 2 tabs

  11. Design principles for prototype and production magnetic measurements of superconducting magnets

    International Nuclear Information System (INIS)

    Brown, B.C.

    1989-02-01

    The magnetic field strength and shape for SSC superconducting magnets will determine critical properties of the accelerator systems. This paper will enumerate the relations between magnetic field properties and magnet material selection and assembly techniques. Magnitudes of various field errors will be explored along with operating parameters which can affect them. Magnetic field quality requirements will be compared to available measuring techniques and the relation between magnetic field measurements and other quality control efforts will be discussed. This will provide a framework for designing a complete magnet measurement plan for the SSC project. 17 refs., 1 fig., 5 tabs

  12. Checking the numbers for the labyrinths shown in the SSC [Superconducting Super Collider] conceptual design

    International Nuclear Information System (INIS)

    Cossairt, J.D.

    1987-04-01

    Reviewed are the designs for access labyrinths presently shown in the Conceptual Design Report to see if they are reasonable for radiation protection purposes. This matter was previously studied two years ago in a Fermilab TM (Co85a). The methods used are based upon scaling the results of calculations done by Gollon and Awschalom. Confidence in the results has been fortified by a successful experimental test. The Conceptual Design Report shows two types of access labyrinths which are significantly different. The first type is that at a Sector Service Area, while the second is that provided for personnel entry to the Interaction Regions

  13. The SSC and speculations on the future of proton machines

    International Nuclear Information System (INIS)

    Tigner, M.

    1987-01-01

    In the U.S. a high energy physics community exists, in concert with many expert coleagues abroad, have submitted to the U.S. DOE, extensive documentation about the conceptual design, status of the R and D, and cost estimates for the SSC. Those documents come to more well over 2,000 pages and are available to anyone who would like to read them. This group is reviewed extensively by the DOE and all the expert committees that can possibly be put together and they have all concurred that the SSC is technically feasible, that the hardware is essentially in hand, and the cost has been properly calculated. That having been completed, the community withdraws into the inner sanctum to take counsel amongst themselves and decide whether or not to put the findings in the FY1988 budget. The next signal is when the President submits his budget in late January of 1988

  14. Preliminary study of magnet design for an SSC

    International Nuclear Information System (INIS)

    Taylor, C.E.; Meuser, R.B.

    1983-08-01

    The overriding design consideration for the SSC magnets is that cost of the facility be minimized; at 8 T, approximately 40 km of bending magnets is required for each ring of a 20 TeV collider. We present some results of a parametric study of two-in-one, iron-core magnets for an SSC. These results are necessarily preliminary in nature, and are intended only to show some of the trade-offs for a wide range of the variables. We show also some results for a reference design that produces 6.5 T in the aperture at 4.4 K for a coil inside diameter of 40 mm. It is not to be inferred that we have established this to be an optimum in any sense

  15. Overview of the physics issues at the SSC

    International Nuclear Information System (INIS)

    Hinchliffe, I.

    1984-11-01

    This report presents an overview of physics issues at the SSC. It discusses the progress made at the DPF Summer Study on the Design and Utilization of the SSC and emphasizes the important problems which remain. The discussion of the physics issues is divided into Standard Model, by which is meant the combination of QCD and the Weinberg-Salam model, and Non-Standard Physics, which includes supersymmetry, technicolor, new gauge bosons, compositeness and all the more or less speculative ideas in which theorists like to indulge. Then the work on identification of final states which contain W's, Z's or heavy quarks is discussed, and the impact of this work on some proposed signals for new physics is considered. Finally, some of the areas in which more work is required are discussed. 110 references

  16. Subcooler assembly for SSC single magnet test program

    International Nuclear Information System (INIS)

    Wu, K.C.; Brown, D.P.; Sondericker, J.H.; Farah, Y.; Zantopp, D.; Nicoletti, A.

    1991-01-01

    A subcooler assembly has been designed, constructed and installed in the MAGCOOL magnet test area at Brookhaven National Laboratory. Since July 1989, it has been used for testing SSC magnets. This subcooler assembly and cryogenic system are the first of its kind ever built. Today, with more than 5000 hours of operating time, the subcooler has proved to be a reliable unit with individual components meeting design expectations. The lowest temperatures achieved with one SSC dipole are 3.0 K at the suction of the cold vacuum pump and 3.2 K at the return of the magnet. The system performs well in both steady state operation and during magnet quench, subcooling, cooldown and warmup. 4 refs., 7 figs

  17. Use of learning programs for SSC trigger strategy studies

    International Nuclear Information System (INIS)

    Clearwater, S.H.; Cleland, W.E.; Stern, E.G.

    1990-01-01

    In a novel application of the learning program RL, we are studying ways to develop the trigger for experiments at the SSC. Our initial study, which is still in progress, is to understand how to select top events from background, combining both cuts at the trigger level and in the off-line analysis. Our plan is to carry out these studies for a variety of reactions and thereby build up a comprehensive view of the trigger requirements for a calorimeter-based experiment at the SSC. Our initial results have shown that the learning program can find correlations and cuts that would be quite difficult to find using traditional methods. The program is expected to obtain cuts that are at least as good, if not better, than the the cuts found by traditional methods

  18. Observations on LEP with a view to SSC

    International Nuclear Information System (INIS)

    Toohig, T.E.

    1984-01-01

    From 24-29 October 1984 a visit was made to the LEP project at CERN with a view to extracting from the LEP planning and experience what might be useful in planning an SSC. With a circumference of 26.7 km, in a reasonably densely-populated area outside the boundaries of the CERN site, LEP already faces most of the problems of environment, public relations, maintenance and operation that will be faced by an SSC project. Information is presented under the headings of: (1) radiation protection; (2) heating, ventilation, and airconditioning; (3) electrical power distribution; (4) LEP experiments/UA1, UA2; (5) civil; (6) infrastructure installation; (7) survey; (8) safety; and (9) LEP controls. Each report lists the CERN individuals who generously provided their insights and help

  19. An automated coil winding machine for the SSC dipole magnets

    International Nuclear Information System (INIS)

    Kamiya, S.; Iwase, T.; Inoue, I.; Fukui, I.; Ishida, K.; Kashiwagi, S.; Sato, Y.; Yoshihara, T.; Yamamoto, S.; Johnson, E.; Gibson, C.

    1990-01-01

    The authors have finished the preliminary design of a fully automated coil winding machine that can be used to manufacture the large number of SSC dipole magnets. The machine aims to perform all coil winding operations including coil parts inserting without human operators at a high productive rate. The machine is composed of five industrial robots. In order to verify the design, they built a small winding machine using an industrial robot and successfully wound a 1 meter long coil using SSC dipole magnet wire. The basic design for the full length coil and the robot winding technique are described in this paper. A fully automated coil winding machine using standard industrial components would be very useful if duplicate production lines are used. 5 figs., 1 tab

  20. Development of pixel detectors for SSC vertex tracking

    International Nuclear Information System (INIS)

    Kramer, G.; Shapiro, S.L.; Arens, J.F.; Jernigan, J.G.; Skubic, P.

    1991-04-01

    A description of hybrid PIN diode arrays and a readout architecture for their use as a vertex detector in the SSC environment is presented. Test results obtained with arrays having 256 x 256 pixels, each 30 μm square, are also presented. The development of a custom readout for the SSC will be discussed, which supports a mechanism for time stamping hit pixels, storing their xy coordinates, and storing the analog information within the pixel. The peripheral logic located on the array, permits the selection of those pixels containing interesting data and their coordinates to be selectively read out. This same logic also resolves ambiguous pixel ghost locations and controls the pixel neighbor read out necessary to achieve high spatial resolution. The thermal design of the vertex tracker and the proposed signal processing architecture will also be discussed. 5 refs., 13 figs., 3 tabs

  1. SSC 40 mm cable results and 50 mm design discussions

    International Nuclear Information System (INIS)

    Christopherson, D.; Capone, D.; Hannaford, R.; Remsbottom, R.; Delashmit, R.; Jayakumar, R.J.; Snitchler, G.; Scanlan, R.; Royet, J.

    1991-01-01

    This paper presents a summary of the cable produced for the 1990 40 mm Dipole Program. The cable design parameters for the 50 mm Dipole Program are discussed, as well as portions of the SSC specification draft. Considerations leading to the final cable configuration and the results of preliminary trials are included. The first iteration of a strand mapping program to automate cable strand maps is introduced

  2. SSC 40 mm cable results and 50 mm design discussions

    International Nuclear Information System (INIS)

    Christopherson, D.; Capone, D.; Hannaford, R.; Remsbottom, R.; Jayakumar, R.; Snitchler, G.; Scanlan, R.; Royet, J.

    1990-09-01

    A summary of the cable produced for the 1990 40 mm Dipole Program is presented. The cable design parameters for the 50 mm Dipole Program are discussed, as well as portions of the SSC specification draft. Considerations leading to the final cable configuration and the results of preliminary trials are included. The first iteration of a strand mapping program to automate cable strand maps is introduced. 7 refs., 2 figs., 1 tab

  3. Total cross sections and elastic scattering at the SSC

    Energy Technology Data Exchange (ETDEWEB)

    Foley, K.J.

    1985-12-05

    The need is discussed of a special purpose detector for the measurement of elastic scattering at the SSC. The detector would cover as small a solid angle as is practical. Two techniques are described briefly to measure total cross sections at hadron storage rings. The direct method is to measure the interaction rate in an IR of known luminosity - a method that gets more difficult increasing energy. A second method is to use the optical theorem. 6 refs., 1 fig. (LEW)

  4. Wire scanner data analysis for the SSC Linac emittance measurement

    International Nuclear Information System (INIS)

    Yao, C.Y.; Hurd, J.W.; Sage, J.

    1993-07-01

    The wire scanners are designed in the SSC Linac for measurement of beam emittance at various locations. In order to obtain beam parameters from the scan signal, a data analysis program was developed that considers the problems of noise reduction, machine modeling, parameter fitting, and correction. This program is intended as a tool for Linac commissioning and also as part of the Linac control program. Some of the results from commissioning runs are presented

  5. Fabrication of a prototype dipole for the SSC Low Energy Booster

    International Nuclear Information System (INIS)

    Spencer, C.M.

    1993-12-01

    The Low Energy Booster of the Superconducting Super Collider (SSC) will be a synchrotron containing 96 dipoles operating between 0.13 T and 1.35 T at 10 Hz. Each dipole's 1.865 m-long core is made from ∼2900 steel laminations (lams), each 52 x 66 cm and 0.635 mm thick. A need to minimize power supply costs and stringent field specifications led to a straight core with very tight mechanical tolerances of the order of 0.05 mm. To satisfy these tolerances, we decided to stack the core in a vertical position; i.e., with the laminations laid horizontally. We designed and built an unusual vertical stacking fixture that pivots into a horizontal position after all the laminations have been stacked and compressed and four support angles welded onto the laminations. The stacking fixture, our experience using it, and conclusions as to the merits of stacking such a long core vertically will be described. The methods of insulating and potting the pancake coils and their installation into the unsplittable core is also described

  6. What the quality philosophy brings to a research and development environment like the SSC

    International Nuclear Information System (INIS)

    Davis, S.; Wentz, J.L.

    1994-01-01

    In achieving major schedule and performance milestones with a project as technologically advanced as the Superconducting Super Collider, many activities must be coordinated simultaneously without the luxury of a conventional design review process. Because the design may change several times prior to the delivery of a one-of-a-kind or prototype component or subsystem, close verification and monitoring of design, manufacturing and test processes are needed on a real-time basis. This verification and monitoring is performed on two levels by Quality Assurance at the SSC Laboratory; Division and General Management. The Division level is involved in day-to-day activities at the Laboratory and the Suppliers; the General Management level performs the independent oversight function for all the Laboratory quality processes. In the divisions, continuous monitoring of design, procurement, manufacturing, installation, and testing activities is performed. At the General Management level, quality program development and implementation is evaluated within each division. Critical suppliers involved in system design, manufacturing and testing are evaluated against contract and program requirements to assure systems safely perform their intended functions

  7. Simulation of the injection damping and resonance correction systems for the HEB of the SSC

    Energy Technology Data Exchange (ETDEWEB)

    Li, M.; Zhang, P.; Machida, S.

    1993-02-01

    An injection damping and resonance correction system for the High Energy Booster (HEB) of the Superconducting Super Collider (SSC) was investigated by means of multiparticle tracking. For an injection damping study, the code Simpsons is modified to utilize two Beam Position Monitors (BPM) and two dampers. ne particles of 200 Gev/c, numbered 1024 or more, with Gaussian distribution in 6-D phase space are injected into the HEB with certain injection offsets. The whole bunch of particles is then kicked in proportion to the BPM signals with some upper limit. Tracking these particles up to several hundred turn while the damping system is acting shows the turn-by-turn emittance growth, which is caused by the tune spread due to nonlinearity of the lattice and residual chromaticity with synchrotron oscillations. For a resonance correction study, the operating tune is scanned as a function of time so that a bunch goes through a resonance. The performance of the resonance correction system is demonstrated. We optimize the system parameters which satisfy the emittance budget of the HEB, taking into account the realistic hardware requirement.

  8. Simulation of the injection damping and resonance correction systems for the HEB of the SSC

    Energy Technology Data Exchange (ETDEWEB)

    Li, M.; Zhang, P.; Machida, S. (Superconducting Super Collider Laboratory, Dallas, Texas 75237 (United States))

    1993-12-25

    An injection damping and resonance correction system for the High Energy Booster (HEB) of the Superconducting Super Collider (SSC) was investigated by means of multiparticle tracking. For an injection damping study, the code Simpsons is modified to utilize two Beam Position Monitors (BPM) and two dampers. The particles of 200 Gev/c, numbered 1024 or more, with Gaussian distribution in 6-D phase space are injected into the HEB with certain injection offsets. The whole bunch of particles is then kicked in proportion to the BPM signals with some upper limit. Tracking these particles up to several hundred turns while the damping system is acting shows the turn-by-turn emittance growth, which is caused by the tune spread due to nonlinearity of the lattice and residual chromaticity with synchrotron oscillations. For a resonance correction study, the operating tune is scanned as a function of time so that a bunch goes through a resonance. The performance of the resonance correction system is demonstrated. We optimize the system parameters which satisfy the emittance budget of the HEB, taking into account the realistic hardware requirement.

  9. Stress relaxation in SSC 50mm dipole coils

    International Nuclear Information System (INIS)

    Rogers, D.; Markley, F.

    1992-04-01

    We are measuring the stress relaxation of SSC 50mm outer coils with the goal of predicting how much of the coil prestress will be lost while the coils are warehoused between manufacture and cooldown. We manufacture 3 inch (76.2mm) long segments of coil with the same materials and techniques that have been used for prototype coils. We are running four simultaneous tests in an attempt to separate the contributions of the different coil materials. Test one is a completely insulated coil section where the insulation is the all polyamide system being tested at Brookhaven; test two is a wire stack insulated only with the normal Kapton overwrap; test three is a stack of bare cable; and test four is a completely insulated normal coil section. All, except for the bare cable, include the ground insulation. The insulated coil sections are carefully dried before loading and testing in order to eliminate stress changes due to varying moisture content. The temperature dependence of the stress relaxation is being studied separately. Three companion papers presented at this conference will be: (1) ''Temperature dependence of the viscoelastic properties of SSC coil insulation'' (2) ''Measurement of the elastic modulus of Kapton perpendicular to the plane of the film at room and cryogenic temperatures'' (3) ''Theoretical methods for creep and stress relaxation studies of SSC coil.''

  10. Evaluating advanced LMR [liquid metal reactor] reactivity feedbacks using SSC

    International Nuclear Information System (INIS)

    Slovik, G.C.; Van Tuyle, G.J.; Kennett, R.J.; Cheng, H.S.

    1988-01-01

    Analyses of the PRISM and SAFR Liquid Metal Reactors with SSC are discussed from a safety and licensing perspective. The PRISM and SAFR reactors with metal fuel are designed for inherent shutdown responses to loss-of-flow and loss-of-heat-sink events. The demonstration of this technology was performed by EBR-II during experiments in April 1986 by ANL (Planchon, et al.). Response to postulated TOPs (control rod withdrawal) are made acceptable largely by reducing reactivity swings, and therefore minimizing the size of possible ractivity insertions. Analyses by DOE and the contractors GE, RI, and ANL take credit for several reactivity feedback mechanisms during transient calculations. These feedbacks include Doppler, sodium density, and thermal expansion of the grid plates, the load pads, the fuel (axial) and the control rod which are now factored into the BNL SSC analyses. The bowing feedback mechanism is not presently modeled in the SSC due to its complexity and subsequent large uncertainty. The analysis is conservative by not taking credit for this negative feedback mechanism. Comparisons of BNL predictions with DOE contractors are provided

  11. Development of Radhard VLSI electronics for SSC calorimeters

    International Nuclear Information System (INIS)

    Dawson, J.W.; Nodulman, L.J.

    1989-01-01

    A new program of development of integrated electronics for liquid argon calorimeters in the SSC detector environment is being started at Argonne National Laboratory. Scientists from Brookhaven National Laboratory and Vanderbilt University together with an industrial participants are expected to collaborate in this work. Interaction rates, segmentation, and the radiation environment dictate that front-end electronics of SSC calorimeters must be implemented in the form of highly integrated, radhard, analog, low noise, VLSI custom monolithic devices. Important considerations are power dissipation, choice of functions integrated on the front-end chips, and cabling requirements. An extensive level of expertise in radhard electronics exists within the industrial community, and a primary objective of this work is to bring that expertise to bear on the problems of SSC detector design. Radiation hardness measurements and requirements as well as calorimeter design will be primarily the responsibility of Argonne scientists and our Brookhaven and Vanderbilt colleagues. Radhard VLSI design and fabrication will be primarily the industrial participant's responsibility. The rapid-cycling synchrotron at Argonne will be used for radiation damage studies involving response to neutrons and charged particles, while damage from gammas will be investigated at Brookhaven. 10 refs., 6 figs., 2 tabs

  12. Color superconductivity

    International Nuclear Information System (INIS)

    Wilczek, F.

    1997-01-01

    The asymptotic freedom of QCD suggests that at high density - where one forms a Fermi surface at very high momenta - weak coupling methods apply. These methods suggest that chiral symmetry is restored and that an instability toward color triplet condensation (color superconductivity) sets in. Here I attempt, using variational methods, to estimate these effects more precisely. Highlights include demonstration of a negative pressure in the uniform density chiral broken phase for any non-zero condensation, which we take as evidence for the philosophy of the MIT bag model; and demonstration that the color gap is substantial - several tens of MeV - even at modest densities. Since the superconductivity is in a pseudoscalar channel, parity is spontaneously broken

  13. Color superconductivity

    Energy Technology Data Exchange (ETDEWEB)

    Wilczek, F. [Institute for Advanced Study, Princeton, NJ (United States)

    1997-09-22

    The asymptotic freedom of QCD suggests that at high density - where one forms a Fermi surface at very high momenta - weak coupling methods apply. These methods suggest that chiral symmetry is restored and that an instability toward color triplet condensation (color superconductivity) sets in. Here I attempt, using variational methods, to estimate these effects more precisely. Highlights include demonstration of a negative pressure in the uniform density chiral broken phase for any non-zero condensation, which we take as evidence for the philosophy of the MIT bag model; and demonstration that the color gap is substantial - several tens of MeV - even at modest densities. Since the superconductivity is in a pseudoscalar channel, parity is spontaneously broken.

  14. Superconducting magnet

    Science.gov (United States)

    1985-01-01

    Extensive computer based engineering design effort resulted in optimization of a superconducting magnet design with an average bulk current density of approximately 12KA/cm(2). Twisted, stranded 0.0045 inch diameter NbTi superconductor in a copper matrix was selected. Winding the coil from this bundle facilitated uniform winding of the small diameter wire. Test coils were wound using a first lot of the wire. The actual packing density was measured from these. Interwinding voltage break down tests on the test coils indicated the need for adjustment of the wire insulation on the lot of wire subsequently ordered for construction of the delivered superconducting magnet. Using the actual packing densities from the test coils, a final magnet design, with the required enhancement and field profile, was generated. All mechanical and thermal design parameters were then also fixed. The superconducting magnet was then fabricated and tested. The first test was made with the magnet immersed in liquid helium at 4.2K. The second test was conducted at 2K in vacuum. In the latter test, the magnet was conduction cooled from the mounting flange end.

  15. Melt formed superconducting joint between superconducting tapes

    International Nuclear Information System (INIS)

    Benz, M.G.; Knudsen, B.A.; Rumaner, L.E.; Zaabala, R.J.

    1992-01-01

    This patent describes a superconducting joint between contiguous superconducting tapes having an inner laminate comprised of a parent-metal layer selected from the group niobium, tantalum, technetium, and vanadium, a superconductive intermetallic compound layer on the parent-metal layer, a reactive-metal layer that is capable of combining with the parent-metal and forming the superconductive intermetallic compound, the joint comprising: a continuous precipitate of the superconductive intermetallic compound fused to the tapes forming a continuous superconducting path between the tapes

  16. Systems engineering at the Superconducting Super Collider (one year later)

    International Nuclear Information System (INIS)

    Nonte, J.

    1991-03-01

    After one year of systems engineering at the Superconducting Super Collider (SSC), the project baseline of costs, schedule milestones, and top-level (point design) physics parameters has been accepted by the Department of Energy (DOE). This paper describes the role of systems engineering in developing the baseline and in establishing requirements specifications, change control, and methods of tracking to a baseline. The differences between the Department of Defense and DOE--specifically at the SSC Laboratory (SSCL)--in application of systems engineering disciplines and tools are discussed. The aim of the paper is to inform participating industries of the anticipated requirements format and of the emphasis that will be placed on physics requirements as opposed to procedures. Industry subcontractors should have a better understanding of the systems engineering expected by the SSCL. 3 figs

  17. Fierce debate looms over funding of superconducting super collider

    International Nuclear Information System (INIS)

    Lepkowski, W.

    1988-01-01

    The coming session of Congress looks like a crucial one in the present era of Big Science. Legislators will have to decide on whether to go ahead and approve construction funding for the biggest atom smasher of all time, the Superconducting Super Collider (SSC). The Administration will be asking for about $230 million (out of a scheduled $350 million) to begin work. But uncertainties loom, and the debate ahead looks bloody. The SSC is a project the Department of Energy says will cost $4.4 billion in fiscal 1988 dollars, rated according to a targeted completion date in 1996. The General Accounting Office pegs the cost at $4.9 billion in 1985 dollars. In inflationary and project stretchout dollars, the figure could easily double. But money for science is again tight in the government, and battles that lie ahead involve the competition between science and social programs, and, indeed, between the sciences themselves. This article discusses these battles

  18. Thermal and flow considerations for the 80 K shield of the SSC magnet cryostats

    International Nuclear Information System (INIS)

    Abramovich, S.; Yuecel, A.; Demko, J.; Thirumaleshwar, M.

    1994-01-01

    The nominal temperatures in the SSC magnets range between 4.2 K in the superconducting coils and 300 K on the cryostat outer wall. To minimize the 4 K heat load, one thermal shield cooled by liquid and vapor nitrogen flows at 84 K, and another cooled by helium flow at 20 K are incorporated in the cryostat. Tubes attached to the shields serve as conduits for the cryogens. The liquid nitrogen tube in the cryostat is used for shield refrigeration and also for liquid distribution around the SSC rings. The second nitrogen line is used to return the vapor to the helium refrigerators for helium precooling. The nominal LN2 flow from a 4.3 km long cryogenic string (4 sections) to the surface is 64 g/s. The total liquid nitrogen consumption of approximately 5000 g/s will be supplied at one, two or more locations on the surface. The total heat load of the 80 K shield is estimated as 3.2 W/m: about 50% is composed of infrared radiation; the remaining 50% is by heat conduction through supports, vacuum barriers and other thermal connections between the shield and the 300 K outer wall. The required LN2 flow rate depends on the distribution and circulation schemes. The LN2 temperature will in turn vary depending on the flow rate and on the recooling method used. For example, with a massflow of 400 g/s of LN2 the temperature rises from 82 K to 86 K between two compact recoolers 1 km apart. This temperature is higher than desired. The temperature can be reduced by increasing the flow rate of the liquid or by using the continuous recooling scheme. This paper discusses some thermal problems caused by certain mechanical designs of the 80 K shield and the possible improvement by using continuous recooling. The authors present results of the 80 K shield temperature distribution analysis, the 20 K shield heat load augmentation resulting from the increased 80 K shield temperatures, the continuous nitrogen recooling scheme and some flow timing related analysis

  19. Superconducting plasmas

    International Nuclear Information System (INIS)

    Ohnuma, Toshiro; Ohno, J.

    1994-01-01

    Superconducting (SC) plasmas are proposed and investigated. The SC plasmas are not yet familiar and have not yet been studied. However, the existence and the importance of SC plasmas are stressed in this report. The existence of SC plasmas are found as follows. There is a fundamental property of Meissner effect in superconductors, which shows a repulsive effect of magnetic fields. Even in that case, in a microscopic view, there is a region of magnetic penetration. The penetration length λ is well-known as London's penetration depth, which is expressed as δ = (m s /μ 0 n s q s 2 ) 1/2 where m s , n s , q s and μ o show the mass, the density, the charge of SC electron and the permeability in free space, respectively. Because this expression is very simple, no one had tried it into more simple and meaningful form. Recently, one of the authors (T.O.) has found that the length can be expressed into more simple and understandable fundamental form as λ = c/ω ps where c = (ε 0 μ 0 ) -1/2 and ω ps = (n s q s 2 /m s ε 0 ) 1/2 are the light velocity and the superconducting plasma frequency. From this simple expression, the penetration depth of the magnetic field to SC is found as a SC plasma skin depth, that is, the fundamental property of SC can be expressed by the SC plasmas. This discovery indicates an importance of the studies of superconducting plasmas. From these points, several properties (propagating modes et al) of SC plasmas, which consist of SC electrons, normal electrons and lattice ions, are investigated in this report. Observations of SC plasma frequency is also reported with a use of Terahertz electromagnet-optical waves

  20. Physics for future supercolliders

    International Nuclear Information System (INIS)

    Kane, G.L.

    1989-01-01

    This paper reports that there has been remarkable progress in understanding the fundamental laws of nature in the past two decades, so that now a real theory of all observed particle interaction exists, called the Standard Model. Finally, after hundreds of years of the development of physics starting from careful descriptions of velocity and acceleration, it is possible to ask broad general questions about such topics as the origins of mass, or why some particles or symmetries exist and not others. Today no experiment in particle physics disagrees with expectations, and there are no puzzles of the traditional sort. Rather, the next stage of experimentation will, it is hoped, help provide answers to very general fundamental, questions

  1. Overview and status of beam instrumentation at the SSC

    International Nuclear Information System (INIS)

    Webber, R.C.

    1993-05-01

    An overview of beam instrumentation requirements at the SSC and a status report on work progress is given. Small transverse emittance beams, ranging in energy from 30 KeV to 20 TeV, must be commissioned, measured, and diagnosed. Instrumentation plans and current design and development efforts for BPMs and other systems are presented. Monitors and electronics soon to be delivered for use in the Linac are described. Design of the Linac systems has been done with requirements and applications in the synchrotron in mind and thus should provide a basis for design of much of that hardware. The useful commonality of design across the machines is discussed

  2. A super fixed target beauty experiment at the SSC

    International Nuclear Information System (INIS)

    Spiegel, L.; Murphy, C.T.; Cox, B.; Arenton, M.; Conetti, S.; Corti, G.; Dukes, C.; Golovatyuk, V.; Lawry, T.; McManus, A.

    1993-01-01

    The observation and precision measurement of CP violation asymmetries and the phase of the CKM matrix is a major objective of B experiments at the SSC. The yields of reconstructed and tagged B decays and the various factors which minimize the dilution factors make measurements of CP asymmetries in the fixed target option known as the SFT more than competitive with much more expensive hadron collider experiments and significantly better than asymmetric e + e - B factories. Moreover, the superior time resolution possible in the SFT configuration allows a precision in the measurement of the CKM matrix element phases possible with the SFT option for various B decay modes

  3. Hadron identification in a fixed target experiment at the SSC

    International Nuclear Information System (INIS)

    Nelson, K.S.; Cox, B.

    1993-01-01

    This article presents the design criteria and expected performance of a hadron identification system in a fixed target experiment at the SSC. The proposed SFT spectrometer will be used as a model for the discussion. Two primary uses of hadron identification is a B physics experiment are flavor tagging and the rejection of background due to particle reflections in the reconstruction of exclusive decay modes. In the first case it is shown that use of kaons can increase substantially the number of events which can be tagged. In the latter case, decays in which particles are mis-identified can form a background to a desired decay mode

  4. Debunching and Capture in the LEB for the SSC

    Energy Technology Data Exchange (ETDEWEB)

    Mahale, N.; Furman, M.

    1991-05-01

    The authors present the details of the capture process in the Low Energy Booster (LEB) for the SSC. They consider only the longitudinal dynamics. Space charge forces are computed quasistatically. The beam pipe is considered to be perfectly conducting. With respect to maximizing the capture efficiency and minimizing the space charge tune spread, initial few milliseconds are very important. They present only the first few milliseconds of the cycle, during which space charge effects are significant. For the numerical simulation they use the code ESME.

  5. Beam diagnostic system for SSC on HIRFL central console

    International Nuclear Information System (INIS)

    Zhang Guixu; Wang Zhen; Huang Tuanhua

    1998-01-01

    The SSC ion beam diagnostic system on the console of HIRFL in institute of modern physics is presented. The information between console and diagnostic system can be transferred via DECnet communication. The central computer for HIRFL console is VAX-8350, the working computer of diagnostic system is changed from IBM PC/XT to COMPAQ 486, and the operating program is rewritten from FORTRAN to C. In order to communicate information, DECnet TTT function is put into both programs on the VAX and PC

  6. Initial results from 50mm short SSC dipoles at Fermilab

    International Nuclear Information System (INIS)

    Bossert, R.C.; Brandt, J.S.; Carson, J.A.; Coulter, K.; Delchamps, S.; Ewald, K.D.; Fulton, H.; Gonczy, I.; Gourlay, S.A.; Jaffery, T.S.; Kinney, W.; Koska, W.; Lamm, M.J.; Strait, J.B.; Wake, M.; Gordon, M.; Hassan, N.; Sims, R.; Winters, M.

    1991-03-01

    Several short model SSC 50 mm bore dipoles are being built and tested at Fermilab. Mechanical design of these magnets has been determined from experience involved in the construction and testing of 40 mm dipoles. Construction experience includes coil winding, curing and measuring, coil end part design and fabrication, ground insulation, instrumentation, collaring and yoke assembly. Fabrication techniques are explained and construction problems are discussed. Similarities and differences from the 40 mm dipole tooling and management components are outlined. Test results from the first models are presented. 19 refs., 12 figs

  7. Conclusions from the engineering subgroup of the SSC liquid argon calorimeter working group

    International Nuclear Information System (INIS)

    Bederede, D.; Cooper, W.; Mulholland, G.; Kroon, P.; Guryn, W.; Lobkowicz, F.; Mason, I.; Pohlen, J.; Schindler, R.H.; Scholle, E.A.; Watanabe, Y.; Watt, R.

    1990-01-01

    The SSC Calorimeter Workshop was organized to explore the feasibility of each calorimeter technology for use in a 4π detector at the SSC. The Liquid Argon Calorimeter group further subdivided into four subgroups; Hermeticity, Engineering, Module Details, and Electronics. This is the report of the Engineering Subgroup whose charge was to evaluate the cost, schedule, manpower, safety, and facilities requirements for the construction of a large liquid argon calorimeter for the SSC

  8. The state of superconductivity

    International Nuclear Information System (INIS)

    Clark, T.D.

    1981-01-01

    The present status of applications based on the phenomena of superconductivity are reviewed. Superconducting materials, large scale applications, the Josephson effect and its applications, and superconductivity in instrumentation, are considered. The influence that superconductivity has had on modern theories of elementary particles, such as gauge symmetry breaking, is discussed. (U.K.)

  9. Review of scientific and technical options for the Superconducting Super Collider Program

    Energy Technology Data Exchange (ETDEWEB)

    Dombeck, T.

    1993-11-01

    This document is a review of options for the Superconducting Super Collider (SSC) Program. It is the result of an informal study by an ad-hoc working group consisting of Laboratory physicists and engineers who investigated the physics and technical implications of a number of possible alternative SSC programs. Previous studies have shown, and early in this study it was confirmed, that a collider of approximately 20 TeV protons on 20 TeV protons with a luminosity of 10{sup 33} cm{sup {minus}2}s{sup {minus}1} at each interaction region is needed to support a physics program that is guaranteed to answer existing particle physics questions and make new discoveries. Therefore, all options considered in this document were consistent with attainment of these original goals for the SSC. One promising option considered was a program of colliding anti-protons on protons as a possible means to reduce the cost of the SSC by eliminating one of the Collider rings. However, the luminosity requirements to obtain the SSC physics goals remains the same as for protons colliding with protons and this study confirms that even though progress has been made over the last ten years in obtaining the high intensity anti-proton beams necessary, a luminosity higher than 10{sup 32} cannot be guaranteed. Other options were examined to see what advantages could be derived by departing from the SSC baseline program, either in schedule, in parameters, by staging, or by combinations of these options. Even though we considered re-examination of the cost of the baseline program to be beyond the scope of this document, differential cost savings were estimated. Finally, a brief survey of progress over the last ten years in various technical areas that might lead to more cost effective engineering designs was included in this study, such as higher magnetic field magnets resulting from lower operating temperatures or higher current-carrying superconducting materials.

  10. Review of scientific and technical options for the Superconducting Super Collider Program

    International Nuclear Information System (INIS)

    Dombeck, T.

    1993-11-01

    This document is a review of options for the Superconducting Super Collider (SSC) Program. It is the result of an informal study by an ad-hoc working group consisting of Laboratory physicists and engineers who investigated the physics and technical implications of a number of possible alternative SSC programs. Previous studies have shown, and early in this study it was confirmed, that a collider of approximately 20 TeV protons on 20 TeV protons with a luminosity of 10 33 cm -2 s -1 at each interaction region is needed to support a physics program that is guaranteed to answer existing particle physics questions and make new discoveries. Therefore, all options considered in this document were consistent with attainment of these original goals for the SSC. One promising option considered was a program of colliding anti-protons on protons as a possible means to reduce the cost of the SSC by eliminating one of the Collider rings. However, the luminosity requirements to obtain the SSC physics goals remains the same as for protons colliding with protons and this study confirms that even though progress has been made over the last ten years in obtaining the high intensity anti-proton beams necessary, a luminosity higher than 10 32 cannot be guaranteed. Other options were examined to see what advantages could be derived by departing from the SSC baseline program, either in schedule, in parameters, by staging, or by combinations of these options. Even though we considered re-examination of the cost of the baseline program to be beyond the scope of this document, differential cost savings were estimated. Finally, a brief survey of progress over the last ten years in various technical areas that might lead to more cost effective engineering designs was included in this study, such as higher magnetic field magnets resulting from lower operating temperatures or higher current-carrying superconducting materials

  11. 100 years of superconductivity

    CERN Document Server

    Rogalla, Horst

    2011-01-01

    Even a hundred years after its discovery, superconductivity continues to bring us new surprises, from superconducting magnets used in MRI to quantum detectors in electronics. 100 Years of Superconductivity presents a comprehensive collection of topics on nearly all the subdisciplines of superconductivity. Tracing the historical developments in superconductivity, the book includes contributions from many pioneers who are responsible for important steps forward in the field.The text first discusses interesting stories of the discovery and gradual progress of theory and experimentation. Emphasizi

  12. High-temperature superconductivity

    International Nuclear Information System (INIS)

    Ginzburg, V.L.

    1987-07-01

    After a short account of the history of experimental studies on superconductivity, the microscopic theory of superconductivity, the calculation of the control temperature and its possible maximum value are presented. An explanation of the mechanism of superconductivity in recently discovered superconducting metal oxide ceramics and the perspectives for the realization of new high-temperature superconducting materials are discussed. 56 refs, 2 figs, 3 tabs

  13. Superconducting accelerator technology

    International Nuclear Information System (INIS)

    Grunder, H.A.; Hartline, B.K.

    1986-01-01

    Modern and future accelerators for high energy and nuclear physics rely increasingly on superconducting components to achieve the required magnetic fields and accelerating fields. This paper presents a practical overview of the phenomenon of superconductivity, and describes the design issues and solutions associated with superconducting magnets and superconducting rf acceleration structures. Further development and application of superconducting components promises increased accelerator performance at reduced electric power cost

  14. Report of the workshop on realistic SSC lattices

    International Nuclear Information System (INIS)

    1985-10-01

    A workshop was held at the SSC Central Design Group from May 29 to June 4, 1985, on topics relating to the lattice of the SSC. The workshop marked a shift of emphasis from the investigation of simplified test lattices to the development of a realistic lattice suitable for the conceptual design report. The first day of the workshop was taken up by reviews of accelerator system requirements, of the reference design solutions for these requirements, of lattice work following the reference design, and of plans for the workshop. The work was divided among four working groups. The first, chaired by David Douglas, concerned the arcs of regular cells. The second group, which studied the utility insertions, was chaired by Beat Leemann. The third group, under David E. Johnson, concerned itself with the experimental insertions, dispersion suppressors, and phase trombones. The fourth group, responsible for global lattice considerations and the design of a new realistic lattice example, was led by Ernest Courant. The papers resulting from this workshop are roughly divided into three sets: those relating to specific lattice components, to complete lattices, and to other topics. Among the salient accomplishments of the workshop were additions to and optimization of lattice components, especially those relating to lattices using 1-in-1 magnets, either horizontally or vertically separated, and the design of complete lattice examples. Selected papers are indexed separately for inclusion in the Energy Science and Technology Database

  15. International collaboration

    International Nuclear Information System (INIS)

    Anon.

    1994-01-01

    In the wake of the demise of the US Superconducting Supercollider (SSC) project last year which empoverished both US and world science, some rapid scene shifting is going on. The SSC may be dead, but the underlying physics quest lives on. In the US, the 'future vision' subpanel of the High Energy Physics Advisory Board (HEPAP) is at work formulating its recommendations. On the international front, the International Committee for Future Accelerators (ICFA) at a special meeting in Vancouver in January drafted a statement

  16. The prototype message broadcast system for the Superconducting Super Collider

    International Nuclear Information System (INIS)

    Low, K.; Skegg, R.

    1990-11-01

    A prototype unified message broadcast system to handle the site-wide distribution of all control system messages for the Superconducting Super Collider is presented. The messages are assembled in the control room area and encapsulated for transmission via a general fiber-optic link system to devices distributed throughout 70 miles of tunnels. An embedded timing signal is used by the distribution system to ensure that messages arrive at all devices simultaneously. Devices receive messages using a special receiver sub-system. A simple version of this system is to be used in the Accelerator Systems String Test (ASST) at the SSC site in 1991. 3 refs., 6 figs., 1 tab

  17. Radio frequency quadrupole linac for the superconducting super collider

    International Nuclear Information System (INIS)

    Schrage, D.L.; Young, L.M.; Clark, W.L.; Billen, J.H.; DePaula, R.F.; Naranjo, A.C.; Neuschaefer, G.H.; Roybal, P.L.; Stovall, J.E.; Ray, K.; Richter, R.

    1993-01-01

    A 2.5 MeV, 428 MHz radio frequency quadrupole (RFQ) linac has been designed and fabricated by the Los Alamos National Laboratory and GAR Electroforming for the Superconducting Super Collider Laboratory. This device is a two segment accelerator fabricated from tellurium-copper (CDA14500) vane/cavity quadrants which are joined by electroforming. The structure incorporates an integral vacuum jacket and has no longitudinal rf or mechanical joints. The SSC RFQ linac is an extension of the design of the 1.0 MeV RFQ which was successfully flown on the BEAR Project. (orig.)

  18. SSC 50 MM collider dipole cryostat single tube support post conceptual design and analysis

    International Nuclear Information System (INIS)

    Nicol, T.H.

    1992-01-01

    Superconducting Super Collider (SSC) dipole magnet cold masses are connected to the cryostat vacuum vessel at five places equally spaced along their length. Five supports limit sag of the cold assembly due to its own weight to a level consistent with the final magnet alignment specifications. The design essentially consists of two composite tubes nested within each other as a means of maximizing the thermal path length. In addition it provides an ideal way to utilize materials best suited for the temperature range over which they must operate. Filament wound S-glass is used between 300K and 80K. Filament wound graphite fiber is used between 80K and 20K and between 20K and 4.5K. S-glass is a better thermal performer above approximately 40K. Graphite composites are ideally suited for operation below 40K. The designs for the 50 mm reentrant supports are well documented in the literature. The current design of the reentrant support has two major drawbacks. First, it requires very tight dimensional control on all components; composite tubes and metal attachment parts. Second, it is expensive, with cost being driven by both the tolerance constraints and by a complex assembly procedure. It seems clear that production magnets will require a support structure which is considerably less expensive than that which is currently used. It seems clear that a design alternate for reentrant support posts will be required for production dipoles primarily due to their cost. It seems less clear that injection molded composite materials are the ideal choice. This report describes the conceptual design for a support post whose function is identical to that of the current reentrant design, which requires very few modifications to surrounding cryostat components, is thermally equivalent to the current 50 mm support post, and is nearly equivalent structurally

  19. The effects of filament magnetization in superconducting magnets as calculated by POISSON

    International Nuclear Information System (INIS)

    Caspi, S.; Gilbert, W.S.; Helm, M.; Laslett, L.J.

    1986-09-01

    Magnetization of superconducting material can be introduced into POISSON through a field dependent permeability table (in the same way that iron characteristics are introduced). This can be done by representing measured magnetization data of the increasing and decreasing field by two independent B-γ curves (γ = 1/μ). Magnetization curves of this type were incorporated into the current regions of the program POISSON and their effect on the field coefficients observed. We have used this technique to calculate the effect of magnetization on the multipole coefficients of a SSC superconducting dipole magnet and to compare these coefficients with measured values

  20. High field superconducting magnets

    Science.gov (United States)

    Hait, Thomas P. (Inventor); Shirron, Peter J. (Inventor)

    2011-01-01

    A superconducting magnet includes an insulating layer disposed about the surface of a mandrel; a superconducting wire wound in adjacent turns about the mandrel to form the superconducting magnet, wherein the superconducting wire is in thermal communication with the mandrel, and the superconducting magnet has a field-to-current ratio equal to or greater than 1.1 Tesla per Ampere; a thermally conductive potting material configured to fill interstices between the adjacent turns, wherein the thermally conductive potting material and the superconducting wire provide a path for dissipation of heat; and a voltage limiting device disposed across each end of the superconducting wire, wherein the voltage limiting device is configured to prevent a voltage excursion across the superconducting wire during quench of the superconducting magnet.

  1. Understanding and application of superconducting materials

    International Nuclear Information System (INIS)

    Moon, Byeong Mu; Lee, Chun Heung

    1997-02-01

    This book deals with superconducting materials, which contains from basic theory to application of superconducting materials. The contents of this book are mystery of superconducting materials, properties of superconducting materials, thermodynamics of superconducting materials, theoretical background of superconducting materials, tunnelling and quantum interference, classification and properties of superconducting materials, high temperature superconducting materials, production and analysis of superconducting materials and application of superconducting materials.

  2. Current Approaches to the Treatment of Systemic-Sclerosis-Associated Pulmonary Arterial Hypertension (SSc-PAH).

    Science.gov (United States)

    Sobanski, Vincent; Launay, David; Hachulla, Eric; Humbert, Marc

    2016-02-01

    Pulmonary arterial hypertension (PAH) is a severe condition causing significant morbidity and mortality in patients with systemic sclerosis (SSc). Despite the use of specific treatments, SSc-PAH survival remains poorer than in idiopathic PAH (IPAH). Recent therapeutic advances in PAH show a lower magnitude of response in SSc-PAH and a higher risk of adverse events, as compared to IPAH. The multifaceted underlying mechanisms and the multisystem nature of SSc probably explain part of the worse outcomes in SSc-PAH compared to IPAH. This review describes the current management of SSc-PAH with an emphasis on the impact of the different organ involvements in the prognosis and treatment response. An earlier detection of PAH and a better characterization of the clinical phenotypes of SSc-PAH are warranted in clinical practice and future trials. Determinants of prognosis, surrogate markers of clinical improvement or worsening, and relevance of the common endpoints used in clinical trials should be evaluated in this specific population. A multidisciplinary approach in expert referral centers is mandatory for SSc-PAH management.

  3. ac superconducting articles

    International Nuclear Information System (INIS)

    Meyerhoff, R.W.

    1977-01-01

    A noval ac superconducting cable is described. It consists of a composite structure having a superconducting surface along with a high thermally conductive material wherein the superconducting surface has the desired physical properties, geometrical shape and surface finish produced by the steps of depositing a superconducting layer upon a substrate having a predetermined surface finish and shape which conforms to that of the desired superconducting article, depositing a supporting layer of material on the superconducting layer and removing the substrate, the surface of the superconductor being a replica of the substrate surface

  4. Variable-field permanent-magnet quadrupole for the SSC

    International Nuclear Information System (INIS)

    Barlow, D.B.; Kraus, R.H. Jr.; Martinez, R.P.; Meyer, R.E.

    1994-01-01

    A set of compact variable-field permanent-magnet quadrupoles have been designed, fabricated, and tested for use in the SSC linac matching section. The quadrupoles have 24 mm-diameter apertures and 40 mm-long poles. The hybrid (permanent-magnet and iron) design, uses a fixed core of magnet material (NdFeB) and iron (C-1006) surrounded by a rotating ring of the same magnet material and iron. The quadrupole gradient-length product can be smoothly varied from a minimum of 0.7 T up to a maximum of 4.3 T by a 90 degree rotation of the outer ring of iron and magnet material

  5. Application of multiple timestep integration method in SSC

    International Nuclear Information System (INIS)

    Guppy, J.G.

    1979-01-01

    The thermohydraulic transient simulation of an entire LMFBR system is, by its very nature, complex. Physically, the entire plant consists of many subsystems which are coupled by various processes and/or components. The characteristic integration timesteps for these processes/components can vary over a wide range. To improve computing efficiency, a multiple timestep scheme (MTS) approach has been used in the development of the Super System Code (SSC). In this paper: (1) the partitioning of the system and the timestep control are described, and (2) results are presented showing a savings in computer running time using the MTS of as much as five times the time required using a single timestep scheme

  6. Performance of field measuring probes for SSC magnets

    International Nuclear Information System (INIS)

    Thomas, R.; Ganetis, G.; Herrera, J.; Hogue, R.; Jain, A.; Louie, W.; Marone, A.; Wanderer, P.

    1994-01-01

    Several years of experience have been acquired on the operation of probes (open-quotes molesclose quotes) constructed for the measurement of the multipole components of the magnetic fields of SSC magnets. The field is measured by rotating coils contained in a 2.4-m long tube that is pulled through the aperture of the magnet by an external device - the transporter. In addition to the measuring coils, the tube contains motors for rotating the coil and a system for sensing local vertical using gravity sensors to provide an absolute reference for the field measurements. The authors describe the steps that must be taken in order to ensure accurate, repeatable measurements; the design changes that have been motivated by difficulties encountered (noise, vibration, variations in temperature); and other performance issues. The mechanical interface between the probe and the beam tube of the magnet is also described

  7. Performance of field measuring probes for SSC magnets

    International Nuclear Information System (INIS)

    Thomas, R.; Ganetis, G.; Herrera, J.; Hogue, R.; Jain, A.; Louie, W.; Marone, A.; Wanderer, P.

    1993-01-01

    Several years of experience have been acquired on the operation of probes (''moles'') constructed for the measurement of the multipole components of the magnetic fields of SSC magnets. The field is measured by rotating coils contained in a 2.4-m long tube that is pulled through the aperture of the magnet by an external device-the transporter. In addition to the measuring coils, the tube contains motors for rotating the coil and a system for sensing local vertical using gravity sensors to provide an absolute reference for the field measurements. We describe the steps that must be taken in order to ensure accurate, repeatable measurements; the design changes that have been motivated by difficulties encountered (noise, vibration, variations in temperature); and other performance issues. The mechanical interface between the probe and the hewn tube of the magnet is also described

  8. Simulation of quenches in SSC magnets with passive quench protection

    International Nuclear Information System (INIS)

    Koepke, K.

    1985-06-01

    The relative ease of protecting an SSC magnet following a quench and the implications of quench protection on magnet reliability and operation are necessary inputs in a rational magnet selection process. As it appears likely that the magnet selection will be made prior to full scale prototype testing, an alternative means is required to ascertain the surviveability of contending magnet types. This paper attempts to provide a basis for magnet selection by calculating the peak expected quench temperatures in the 3 T Design C magnet and the 6 T Design D magnet as a function of magnet length. A passive, ''cold diode'' protection system has been assumed. The relative merits of passive versus active protection systems have been discussed in a previous report. It is therefore assumed that - given the experience gained from the Tevatron system - that an active quench protection system can be employed to protect the magnets in the eventuality of unreliable cold diode function

  9. Scintillating fiber detector development for the SSC: Annual progress report

    International Nuclear Information System (INIS)

    Ruchti, R.C.

    1989-01-01

    During the past year, considerable effort has been applied to the development of scintillating fiber detectors in several areas: new scintillation liquids and studies of their fluorescence properties; new fluorescent dyes based on non-intramolecular proton transfer; new dyes based on intramolecular proton transfer; incorporation of these new dyes in plastic (polystyrene) and liquid scintillation solutions; development of small cross section glass capillaries for the containment of liquid scintillators; studies of waveguide characteristics; studies of image intensifier phosphor screen characteristics; initial steps to form a collaboration to study and develop appropriate new properties of the Solid State Photomultiplier; construction of a new laboratory at Notre Dame to enhance our capabilities for further measurements and studies; and organization of and execution of a Workshop on Scintillating Fiber Detector Development for the SSC, held at Fermilab, November 14--16, 1988

  10. Collider Physics: SDC/SSC liquified fiber calorimetry

    International Nuclear Information System (INIS)

    White, J.T.; Huson, F.R.

    1992-01-01

    Most effort was directed toward the D-Zero experiment at Fermilab. Over 3 pb -1 of high-quality physics data have been obtained. Analysis of the results (wino-zino physics, squark physics), D-zero data acquisition systems efforts, and level-1 and level-2 trigger work are described. Other work concerned detector development for use at the SSC. This technology consists of using liquid scintillator-filled tubes as scintillating fibers for a ''calorimeter.'' The key issues were to demonstrate that the liquid fibers were sufficiently rad-hard and to demonstrate that fibers with sufficiently long attenuation length could be found to satisfy the resolution requirements; both constraints could be satisfied

  11. Rad-hard electronics study for SSC detectors

    International Nuclear Information System (INIS)

    Ekenberg, T.; Dawson, J.; Stevens, A.; Haberichter, W.

    1991-01-01

    The radiation environment in a SSC detector operating at a luminosity of 10 33 cm -2 s -1 will put stringent requirements on radiation hardness of the electronics. Over the expected 10 year life-time of a large detector, ionizing radiation doses of up to 20 MRad and neutron fluences of 10 16 neutrons/cm 2 are projected. At a luminosity of 10 34 cm -2 s -1 even higher total doses are expected. the effect of this environment have been simulated by exposing CMOS/bulk and CMOS/SOS devices from monolithic processes to neutrons and ionizing radiation. leakage currents, noise variations, and DC characteristics have been measured before and after exposure in order to evaluate the effects of the irradiations. As expected the device characteristics remained virtually unchanged by neutron irradiation, while ionizing radiation caused moderate degradation of performance. 5 refs., 6 figs

  12. A novel bridge coupler for SSC coupled cavity linac

    International Nuclear Information System (INIS)

    Yao, C.G.; Chang, C.R.; Funk, W.

    1992-01-01

    A novel magnetically coupled multi-cavity bridge coupler is proposed for SSC Coupled-Cavity-Linac (CCL). The bridge coupler is a five cell disc-loaded waveguide with a small central aperture used for measurement and two large curved coupling slots near the edge on each disc. The two coupling slots on the adjacent disc are rotated 90 degrees in orientation to reduce the direct coupling. This type of structure is capable of producing very large coupling (>10% in our longest bridge coupler). Also because of the small opening on the discs, the high-order-modes are very far (> 300 MHz) above the operating mode. Thus for long bridge couplers, the magnetic coupled structure should provide maximum coupling with minimum mode mixing problems. In this paper both physics and engineering issues of this new bridge coupler are presented. (Author) 5 refs., 2 tabs., 6 figs

  13. Variable-field permanent magnet quadrupole for the SSC

    International Nuclear Information System (INIS)

    Barlow, D.B.; Kraus, R.H. Jr.; Martinez, R.P.; Meyer, R.E.

    1993-01-01

    A set of compact variable-field permanent-magnet quadrupoles have been designed, fabricated, and tested for use In the SSC linac matching section. The quadrupoles have 24 mm-diameter apertures and 40 mm-long poles. The hybrid (permanent-magnet and iron) design, uses a fixed core of magnet material (NdFeB) and iron (C-1006) surrounded by a rotating ring of the same magnet material and iron. The quadrupole gradient-length product can be smoothly varied from a minimum of 0.7 T up to a maximum, of 4.3 T by a 90 degrees rotation of the outer ring of iron and magnet material

  14. Winding mandrel design for the wide cable SSC dipole

    International Nuclear Information System (INIS)

    Morgan, G.H.; Greene, A.; Jochen, G.; Morgillo, A.

    1990-01-01

    The 50 mm coil i.d. SSC dipole magnets use wider cables to give a greater operational margin between quench field and operating field. The cable used for the inner coil has 30 strands of the same size (0.808 mm) instead of 23 and the outer has 36 strands of the same size (0.648 mm) instead of 30 and the cable widths are increased in proportion. Although the coil inner diameter has been increased from 40 mm, the coil ends are noticeably harder to wind. This report describes the computational and experimental effort to design winding mandrels or center posts for the constant-perimeter ends. 1 ref., 2 figs., 2 tabs

  15. A development environment for the SSC control system

    International Nuclear Information System (INIS)

    Murray, Doug; Martinsen, Garth; Wang, Judy

    1994-01-01

    The SSC is developing a design environment for control system development within the context of EPICS. The environment is aimed at developers of applications using the EPICS Input/Output Controller (IOC). The unique aspect of this effort is our emphasis on providing a simple and intuitive development environment compared with tools currently available. Our most important goal in this effort has been to hide the complexity of EPICS IOC development from the developers. This paper describes two tools which are under development; The Function Block Editor (FBE) and the State Machine Editor (SME). The FBE provides a visual editing environment for graphically describing control processes as a set of related functional blocks. The configuration of functional blocks is then translated into IOC records and executed. SME allows the user to visually construct a sequence using a notation we are modeling after Grafcet [1]. State machines are translated into EPICS State Notation Language programs and executed. Future extensions will be described. ((orig.))

  16. A facility to test short superconducting accelerator magnets at Fermilab

    International Nuclear Information System (INIS)

    Lamm, M.J.; Hess, C.; Lewis, D.; Jaffery, T.; Kinney, W.; Ozelis, J.P.; Strait, J.; Butteris, J.; McInturff, A.D.; Coulter, K.J.

    1992-10-01

    During the past four years the Superconducting Magnet R ampersand D facility at Fermilab (Lab 2) has successfully tested superconducting dipole, quadrupole, and correction coil magnets less than 2 meters in length for the SSC project and the Tevatron D0/B0 Low-β Insertion. During this time several improvements have been made to the facility that have greatly enhanced its magnet testing capabilities. Among the upgrades have been a new rotating coil and data acquisition system for measuring magnetic fields, a controlled flow liquid helium transfer line using an electronically actuated cryo valve, and stand-alone systems for measuring AC loss and training low current Tevatron correction coil packages. A description of the Lab 2 facilities is presented

  17. Straight ends for superconducting dipole magnet using constant perimeter geometry

    International Nuclear Information System (INIS)

    Royet, J.

    1989-01-01

    The ends of the SSC Dipole magnets are a very critical aspect of the superconducting cable windings needed for this large project. The internal coils, where the radius at the pole is as small as 3/10 of an inch for the first turn, are difficult to form with the very stiff cable, and a high tension is needed. The curing operation on the coils is performed in a heated forming press which applies an important additional stress on the superconducting wire and insulation. A new design of this sensitive region of the magnets was performed at LBL, and several prototypes were built and tested. In this paper the construction method used to solve some of the most critical problems is exposed along with a description of the experimental work in progress. 3 refs., 2 figs

  18. WORKSHOPS: Radiofrequency superconductivity

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    In the continual push towards higher energy particle beams, superconducting radiofrequency techniques now play a vital role, highlighted in the fifth workshop on radiofrequency superconductivity, held at DESY from 19 - 24 August 1991

  19. WORKSHOPS: Radiofrequency superconductivity

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1992-01-15

    In the continual push towards higher energy particle beams, superconducting radiofrequency techniques now play a vital role, highlighted in the fifth workshop on radiofrequency superconductivity, held at DESY from 19 - 24 August 1991.

  20. Genome Wide Association Studies (GWAS Identify QTL on SSC2 and SSC17 Affecting Loin Peak Shear Force in Crossbred Commercial Pigs.

    Directory of Open Access Journals (Sweden)

    Chunyan Zhang

    Full Text Available Of all the meat quality traits, tenderness is considered the most important with regard to eating quality and market value. In this study we have utilised genome wide association studies (GWAS for peak shear force (PSF of loin muscle as a measure of tenderness for 1,976 crossbred commercial pigs, genotyped for 42,721 informative SNPs using the Illumina PorcineSNP60 Beadchip. Four 1 Mb genomic regions, three on SSC2 (at 4 Mb, 5 Mb and 109 Mb and one on SSC17 (at 20 Mb, were detected which collectively explained about 15.30% and 3.07% of the total genetic and phenotypic variance for PSF respectively. Markers ASGA0008566, ASGA0008695, DRGA0003285 and ASGA0075615 in the four regions were strongly associated with the effects. Analysis of the reference genome sequence in the region with the most important SNPs for SSC2_5 identified FRMD8, SLC25A45 and LTBP3 as potential candidate genes for meat tenderness on the basis of functional annotation of these genes. The region SSC2_109 was close to a previously reported candidate gene CAST; however, the very weak LD between DRGA0003285 (the best marker representing region SSC2_109 and CAST indicated the potential for additional genes which are distinct from, or interact with, CAST to affect meat tenderness. Limited information of known genes in regions SSC2_109 and SSC17_20 restricts further analysis. Re-sequencing of these regions for informative animals may help to resolve the molecular architecture and identify new candidate genes and causative mutations affecting this trait. These findings contribute significantly to our knowledge of the genomic regions affecting pork shear force and will potentially lead to new insights into the molecular mechanisms regulating meat tenderness.

  1. Superconducting current in a bisoliton superconductivity model

    International Nuclear Information System (INIS)

    Ermakov, V.N.; Kruchinin, S.P.; Ponezha, E.A.

    1991-01-01

    It is shown that the transition into a superconducting state with the current which is described by a bisoliton superconductivity model is accompanied by the deformation of the spectrum of one-particle states of the current carriers. The deformation value is proportional to the conducting current force. The residuaby resistance in such state is absent

  2. Advanced nonlinear theory: Long-term stability at the SSC

    International Nuclear Information System (INIS)

    Heifets, S.

    1987-01-01

    This paper discussed the long-term stability of the particle beams in the Superconducting Super Collider. In particular the dynamics of a single particle beam is considered in depth. The topics of this paper include: the Hamiltonian of this particle approach, perturbation theory, canonical transformations, interaction of the resonances, structure of the phase space, synchro-Betatron oscillations, modulation diffusion and noise-resonance interaction. 36 refs

  3. A performance requirements analysis of the SSC control system

    International Nuclear Information System (INIS)

    Hunt, S.M.; Low, K.

    1992-01-01

    This paper presents the results of analysis of the performance requirements of the Superconducting Super Collider Control System. We quantify the performance requirements of the system in terms of response time, throughput and reliability. We then examine the effect of distance and traffic patterns on control system performance and examine how these factors influence the implementation of the control network architecture and compare the proposed system against those criteria. (author)

  4. Enhanced superconductivity of fullerenes

    Energy Technology Data Exchange (ETDEWEB)

    Washington, II, Aaron L.; Teprovich, Joseph A.; Zidan, Ragaiy

    2017-06-20

    Methods for enhancing characteristics of superconductive fullerenes and devices incorporating the fullerenes are disclosed. Enhancements can include increase in the critical transition temperature at a constant magnetic field; the existence of a superconducting hysteresis over a changing magnetic field; a decrease in the stabilizing magnetic field required for the onset of superconductivity; and/or an increase in the stability of superconductivity over a large magnetic field. The enhancements can be brought about by transmitting electromagnetic radiation to the superconductive fullerene such that the electromagnetic radiation impinges on the fullerene with an energy that is greater than the band gap of the fullerene.

  5. Superconductivity in Medicine

    Science.gov (United States)

    Alonso, Jose R.; Antaya, Timothy A.

    2012-01-01

    Superconductivity is playing an increasingly important role in advanced medical technologies. Compact superconducting cyclotrons are emerging as powerful tools for external beam therapy with protons and carbon ions, and offer advantages of cost and size reduction in isotope production as well. Superconducting magnets in isocentric gantries reduce their size and weight to practical proportions. In diagnostic imaging, superconducting magnets have been crucial for the successful clinical implementation of magnetic resonance imaging. This article introduces each of those areas and describes the role which superconductivity is playing in them.

  6. Best practices: Strategic stigma change (SSC): five principles for social marketing campaigns to reduce stigma.

    Science.gov (United States)

    Corrigan, Patrick W

    2011-08-01

    This column describes strategic stigma change (SSC), which comprises five principles and corresponding practices developed as a best practice to erase prejudice and discrimination associated with mental illness and promote affirming behaviors and social inclusion. SSC principles represent more than ten years of insights from the National Consortium on Stigma and Empowerment. The principles, which are centered on consumer contact that is targeted, local, credible, and continuous, were developed to inform the growth of large-scale social marketing campaigns supported by governments and nongovernmental organizations. Future social marketing efforts to address stigma and the need for evidence to determine SSC's penetration and impact are also discussed.

  7. Superconductivity in transition metals.

    Science.gov (United States)

    Slocombe, Daniel R; Kuznetsov, Vladimir L; Grochala, Wojciech; Williams, Robert J P; Edwards, Peter P

    2015-03-13

    A qualitative account of the occurrence and magnitude of superconductivity in the transition metals is presented, with a primary emphasis on elements of the first row. Correlations of the important parameters of the Bardeen-Cooper-Schrieffer theory of superconductivity are highlighted with respect to the number of d-shell electrons per atom of the transition elements. The relation between the systematics of superconductivity in the transition metals and the periodic table high-lights the importance of short-range or chemical bonding on the remarkable natural phenomenon of superconductivity in the chemical elements. A relationship between superconductivity and lattice instability appears naturally as a balance and competition between localized covalent bonding and so-called broken covalency, which favours d-electron delocalization and superconductivity. In this manner, the systematics of superconductivity and various other physical properties of the transition elements are related and unified. © 2015 The Author(s) Published by the Royal Society. All rights reserved.

  8. Suppression of emittance growth caused by mechanical vibrations of magnetic elements in presence of beam-beam effects in the SSC

    International Nuclear Information System (INIS)

    Lebedev, V.A.; Parkhomchuk, V.V.; Shil'tsev, V.D.; Skrinskij, A.N.

    1991-01-01

    A ground motion produces shifts of storage ring quadrupoles. It strongly influences on the beam behaviour in large proton (anti)proton colliders due to the closed orbit distortion and due to the transverse emittance growth. Calculations of both effects are presented in this paper. An active feedback system is useful for the emittance growth suppression. It is shown that in this case the main parameter which determines the emittance growth is the betatron tune spread due to the beam-beam effects. A simple analytical model is considered which results are in good coincidence with computer simulations. All calculations are adapted to the Superconducting Super Collider (SSC). 13 refs.; 9 figs.; 3 tabs

  9. Design of the SSC medium-beta Interaction Regions

    International Nuclear Information System (INIS)

    Nosochkov, Y.M.

    1993-06-01

    In the SSC design the 87.12 km long collider lattice consists of two 35.28 km identical arcs located on the North and South sides of the machine and two 8.28 km clusters placed on the West and on the East. Each cluster contains two Interaction Regions (IRs), the Utility section and the interconnect sections between them. According to present plans the goal for the optics in the East IRs is to provide for a high value of the luminosity and, hence, for a low β at the Interaction Point (IP). The West IRs are aimed at providing for a large space for detector which can be achieved at the cost of higher value of the β and lower luminosity. The optics of each IR are based on the same optical configuration which gives an opportunity to use mostly identical quadrupoles and dipoles in four IRs. Trivial modification of the central region in this basic configuration allows for a wide range of values for detector free space from L = 20 m to L = 90 m, suitable for the experiments in both clusters. L denotes here the distance between the IP and the nearest magnetic element of the machine. In this paper we briefly review the current design of the so-called medium-β IR optics with a large free space for detector of L = 90 m, which could be used in the West cluster

  10. Two dimensional magnetic field calculations for the SSC dipole magnets

    International Nuclear Information System (INIS)

    Krefta, M.P.; Pavlik, D.

    1991-01-01

    In this work two-dimensional methods are used to calculate the magnetic fields throughout the cross section of a SSC dipole magnet. Analytic techniques, which are based on closed form solutions to the defining field equations, are used to calculate the multipole content for any specified conductor positioning. The method is extended to investigate the effects of radial slots or keyways in the iron yoke. The multipole components of field, directly attributable to the slots or keyways, are examined as a function of size and location. It is shown that locating the slots or keyways at the magnet pole centers has a large effect on the multipole components; whereas, locating the keyways between the magnet poles has little effect on any of the multipoles. The investigation of nonlinear effects such as ferromagnetic saturation or superconductor magnetization relies on the use of numerical methods such as the finite element method. The errors associated with these codes are explained in terms of numerical round-off, spatial discretization error and the representation of distant boundaries. A method for increasing the accuracy of the multipole calculation from finite element solutions is set forth. It is shown that calculated multipole coefficients are sensitive to boundary conditions external to the cold mass during conditions of magnetic saturation

  11. A room-temperature liquid calorimeter prototype for the SSC

    International Nuclear Information System (INIS)

    Brandenburg, G.W.; Geer, S.H.; Oliver, J.; Sadowski, E.; Theriot, D.

    1990-01-01

    Calorimeters will be an extremely important part of SSC detectors as they have been in existing collider detectors. The main issues that need to be addressed are: (1) energy resolution of jets and electrons, (2) segmentation, (3) hermiticity, (4) response time, and (5) radiation resistance. An attractive possibility on all these counts is the use of room-temperature liquids together with uranium, as pioneered by UA1. The authors are planning a prototype calorimeter which consists of a sealed vessel containing both the radiator plates and the readout pads. This geometry has been appropriately named the swimming pool design. The general mechanical starting point is similar to the SLD liquid argon calorimeters. The points they wish to address are the following: (1) Simple and reliable modular construction techniques, (2) Satisfactory electrical connections with minimal geometric impact, (3) The necessity of isolating radiator plates and liquid to maintain purity, (4) What materials can be immersed without compromising the liquid purity. The design and construction of the swimming pool electromagnetic calorimeter prototype is being carried out at the Harvard High Energy Physics Laboratory. This is one of the first attempts to build a full-scale prototype of such a design

  12. Automatic beam centering at the SSC interaction regions

    International Nuclear Information System (INIS)

    Joestlein, H.

    1984-01-01

    In the SSC interaction regions, the two colliding beams, each only a few microns in size, will have to be centered and maintained in good alignment over many hours, in order to provide the maximum possible luminosity and to minimize off-center beam-beam focussing effects. It is unlikely that sufficiently good alignment can be achieved without some kind of active feedback system, based on the beam-beam interaction rate. This memo describes such a system. In the proposed scheme, one of the beams is moved continuously and in a circular fashion about its mean transverse position. The radius of this motion is approximately 0.01 of the rms beam size at the interaction point. The motion is achieved with two sets of crossed high frequency dipole magnets, one on each side of the interaction region, suitably phased. As a consequence of this motion, the beam-beam interaction rate is modulated in synchronism with the beam motion when the beams are not centered on one another. The amplitude and phase of this modulation yields information on the magnitude and direction of the misalignment between the beams, allowing continuous display and automatic correction of any misalignment

  13. Double Pomeron Exchange from the ISR to the SSC

    International Nuclear Information System (INIS)

    Albrow, M.G.

    1989-01-01

    After a general introduction to Double Pomeron Exchange I show how the existence of the process was demonstrated at the CERN Intersecting Storage Rings and discuss its value there as a spectroscopic tool in meson/glueball studies. At higher collision energies as now available at the Super Proton Synchrotron and Fermilab pp-bar Colliders it would be very interesting to study hard processes in Double Pomeron Exchange and investigate Pomeron structure. The still higher Large Hadron Collider and Superconducting Super Collider energies extend the range of this physics dramatically, possibly into the electroweak sector. (author)

  14. Qualification of technical personnel for employment during construction and operation of the SSC

    International Nuclear Information System (INIS)

    Johnson, C.D.; Wolf, L.J.

    1991-01-01

    In the early stages of the SSC design it became apparent that construction will have a significant impact on post-secondary technical/vocational education in Texas. Present estimates are that from 2,000 to 3,000 employees will be needed in the traditional fields of civil, mechanical, electrical technology, computers as well as exotic technologies such as cryogenics and high vacuum. In this paper an on-going project is described which is directed toward assuring that graduates of Texas post-secondary technical and vocational education programs will be competitive for employment in these jobs. The project involves development of SSC pedagogical material at a level appropriate to the students, education of teachers about the SSC and development of delivery systems for education about the SSC

  15. Increasing NASA SSC Range Safety by Developing the Framework to Monitor Airspace and Enforce Restrictions

    Data.gov (United States)

    National Aeronautics and Space Administration — The NASA John C. Stennis Space Center (SSC) Office of Safety and Mission Assurance (SMA) has a safety concern associated with unauthorized aircraft entering...

  16. A full-acceptance detector for SSC physics at low and intermediate mass scales

    International Nuclear Information System (INIS)

    Bjorken, J.D.

    1992-01-01

    The author of this paper is interested in seeing the proposed detector and physics measurements done at the SSC. It should be clear that the author views this subject as important enough to warrant the effort going into producing this tome. It should also be clear that nothing will happen unless members of the experimental community come forward and do real work to see whether the ideas contained herein are sound and that the physics is indeed worth a dedicated effort at the SSC. Therefore this paper is directed more toward the experimental community than the SSC Laboratory. However, since initial encouragement (or discouragement) by the laboratory is evidently very important, this paper also contains specific requests addressed to the SSC Laboratory

  17. Detection of H0 → γγ at the SSC

    International Nuclear Information System (INIS)

    Barter, C.; Partridge, R.; Bay, A.; Spadafora, A.; Whitaker, S.; Abashian, A.; Kass, R.

    1989-01-01

    This paper explores the prospects for using the SSC to find an intermediate mass Higgs boson through its decay to two photons. Monte Carlo studies of the signal and various backgrounds are performed to determine the required detector parameters

  18. Performance evaluation of concrete bridge decks reinforced with MMFX and SSC rebars.

    Science.gov (United States)

    2006-01-01

    This report investigates the performance of bridge decks reinforced with stainless steel clad (SSC) and micro-composite multistructural formable steel (MMFX) rebars. The two-span Galloway Road Bridge on route CR5218 over North Elkhorn Creek in Scott ...

  19. Review of project definition studies of possible on-site uses of superconducting super collider assets and facilities. Final report

    International Nuclear Information System (INIS)

    1994-12-01

    This document reports on the results of a peer review and evaluation of studies made of potential uses of assets from the terminated Superconducting Super Collider (SSC) project. These project definition studies focused on nine areas of use of major assets and facilities at the SSC site near Waxahachie, Texas. The studies were undertaken as part of the effort to maximize the value of the investment made in the SSC and were supported by two sets of grants, one to the Texas National Research Laboratory Commission (TNRLC) and the second to various universities and other institutions for studies of ideas raised by a public call for expressions of interest. The Settlement Agreement, recently signed by the Department of Energy (DOE) and TNRLC, provides for a division of SSC property. As part of the goal of maximizing the value of the SSC investment, the findings contained in this report are thus addressed to officials in both the Department and TNRLC. In addition, this review had several other goals: to provide constructive feedback to those doing the studies; to judge the benefits and feasibility (including funding prospects) of the projects studied; and to help worthy projects become reality by matching projects with possible funding sources

  20. Review of project definition studies of possible on-site uses of superconducting super collider assets and facilities

    International Nuclear Information System (INIS)

    1994-12-01

    This document reports on the results of a peer review and evaluation of studies made of potential uses of assets from the terminated Superconducting Super Collider (SSC) project. These project definition studies focused on nine areas of use of major assets and facilities at the SSC site near Waxahachie, Texas. The studies were undertaken as part of the effort to maximize the value of the investment made in the SSC and were supported by two sets of grants, one to the Texas National Research Laboratory Commission (TNRLC) and the second to various universities and other institutions for studies of ideas raised by a public call for expressions of interest. The Settlement Agreement, recently signed by the Department of Energy (DOE) and TNRLC, provides for a division of SSC property. As part of the goal of maximizing the value of the SSC investment, the findings contained in this report are thus addressed to officials in both the Department and TNRLC. In addition, this review had several other goals: to provide constructive feedback to those doing the studies; to judge the benefits and feasibility (including funding prospects) of the projects studied; and to help worthy projects become reality by matching projects with possible funding sources

  1. Review of project definition studies of possible on-site uses of superconducting super collider assets and facilities

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-12-01

    This document reports on the results of a peer review and evaluation of studies made of potential uses of assets from the terminated Superconducting Super Collider (SSC) project. These project definition studies focused on nine areas of use of major assets and facilities at the SSC site near Waxahachie, Texas. The studies were undertaken as part of the effort to maximize the value of the investment made in the SSC and were supported by two sets of grants, one to the Texas National Research Laboratory Commission (TNRLC) and the second to various universities and other institutions for studies of ideas raised by a public call for expressions of interest. The Settlement Agreement, recently signed by the Department of Energy (DOE) and TNRLC, provides for a division of SSC property. As part of the goal of maximizing the value of the SSC investment, the findings contained in this report are thus addressed to officials in both the Department and TNRLC. In addition, this review had several other goals: to provide constructive feedback to those doing the studies; to judge the benefits and feasibility (including funding prospects) of the projects studied; and to help worthy projects become reality by matching projects with possible funding sources.

  2. Review of project definition studies of possible on-site uses of superconducting super collider assets and facilities. Final report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-12-01

    This document reports on the results of a peer review and evaluation of studies made of potential uses of assets from the terminated Superconducting Super Collider (SSC) project. These project definition studies focused on nine areas of use of major assets and facilities at the SSC site near Waxahachie, Texas. The studies were undertaken as part of the effort to maximize the value of the investment made in the SSC and were supported by two sets of grants, one to the Texas National Research Laboratory Commission (TNRLC) and the second to various universities and other institutions for studies of ideas raised by a public call for expressions of interest. The Settlement Agreement, recently signed by the Department of Energy (DOE) and TNRLC, provides for a division of SSC property. As part of the goal of maximizing the value of the SSC investment, the findings contained in this report are thus addressed to officials in both the Department and TNRLC. In addition, this review had several other goals: to provide constructive feedback to those doing the studies; to judge the benefits and feasibility (including funding prospects) of the projects studied; and to help worthy projects become reality by matching projects with possible funding sources.

  3. Superconducting and other phases in organic high polymers of polyacenic carbon skeletons. II. The mean field method

    International Nuclear Information System (INIS)

    Kimura, M.; Kawabe, H.; Nishikawa, K.; Aono, S.

    1986-01-01

    Ordered phases such as CDW, SDW, and the singlet superconductivity(SSC) are predicted by means of a mean field theory. The electronic Hamiltonian is linearized by introducing order parameters which are expected to arise, and these order parameters are determined self-consistently. The behaviors of gap, transition temperature, and condensation energy are greatly different from those of BCS theory. The coexistence of the various phases is discussed. Aside from a very special case the single phase is most stable

  4. Mechanical and electromagnetic design of the SSC QSE101 quadrupole ends

    International Nuclear Information System (INIS)

    Orrell, D.; Nobrega, F.; Lilly, J.; Snitchler, G.; Jayakumar, J.; Venkatraman, V.; Brandt, J.S.

    1992-01-01

    The SSC collider magnets feature grouped ends in which cables of a particular coil remain stacked together as they are bent around the end. Methods have been developed to form the ends in such a way that mechanical stresses are lowered and field quality is optimized. This paper discusses techniques of end turn design and presents calculations of harmonics and peak fields for the SSC quadrupole QSE101

  5. Mechanical and electromagnetic design of the SSC QSE101 quadrupole ends

    International Nuclear Information System (INIS)

    Orrell, D.; Nobrega, F.; Lilly, J.; Snitchler, G.; Jayakumar, J.; Venkatraman, V.; Brandt, J.S.

    1991-06-01

    The SSC collider magnets feature grouped ends in which cables of a particular coil remain stacked together as they are gent around the end. methods have been developed to form the ends in such a way that mechanical stresses are lowered and field quality is optimized. This paper discusses techniques of end turn design and presents calculations of harmonics and peak fields for the SSC quadrupole QSE101. 5 refs., 9 figs

  6. EVALUATING THE EFFECTIVENESS OF TEACHING METHODS USED FOR GCE AND SSC LEVELS

    OpenAIRE

    Bhatti, Muhammad Safdar; Mukhtar, Rafia; Bajwa, Shahla

    2017-01-01

    Thepresent research focuses on comparative study of the Secondary SchoolCertificate (SSC) and the General Certificate of Education-Ordinary level(GCE-O level) English language course to trace out the problems andshortcomings of the curriculum objectives and teaching methods. The objectivesof the study were to analyze the objectives of teaching English of SSC and GCEO-level to critically review the teaching methodologies of both the courses.The population of the study comprised of all the teac...

  7. Magnetic field measurements of full length 50 mm aperture SSC dipole magnets at Fermilab

    International Nuclear Information System (INIS)

    Strait, J.; Bossert, R.; Carson, J.; Delchamps, S.W.; Gourlay, S.; Hanft, R.; Koska, W.; Kuchnir, M.; Lamm, M.J.; Mazur, P.O.; Mokhtarani, A.; Orris, D.; Ozelis, J.; Wake, M.; Devred, A.; DiMarco, J.; Kuzminski, J.; Puglisi, M.; Tompkins, J.C.; Yu, Y.; Zhao, Y.; Zheng, H.; Ogitsu, T.

    1992-09-01

    Thirteen 16 m long, 50 mm aperture SSC dipole magnets, designed jointly by Fermilab, Brookhaven National Laboratory, Lawrence Berkeley Laboratory and the SSC Laboratory, have been built at Fermilab. The first nine magnets have been fully tested to date. The allowed harmonics are systematically shifted from zero by amounts larger than the specification. The unallowed harmonics, with the exception of the skew sextupole, are consistent with zero. The magnet-to-magnet RMS variation of all harmonics is much smaller than the specification

  8. Technical assessment of environmental and cost implications of superconducting super collider decommissioning

    International Nuclear Information System (INIS)

    Chen, S.Y.; Opelka, J.H.; Chambers, W.C.; Stavrou, J.

    1988-07-01

    Potential environmental and cost implications of decommissioning the proposed Superconducting Super Collider (SSC) are examined. One decommissioning alternative is selected for general assessment. That alternative includes removal of the major sources of radioactivity induced during operation and temporary entombment of remaining underground facilities. On the suface, the campus complex would be left in place for future use, but most other aboveground features would be dismantled and removed. Because of the low level of radioactivity that would be induced in SSC components during system operation, potential radiological impacts to the environment from decommissioning would be benign, and the estimated total occupational radiation dose to workers would be less that 5 person-rem. Potential nonradiological impacts of decommissioning are not evaluated because of the lack of site-specific data. The total estimated cost of decommissioning operations is $38 million. Although few current regulations are explicitly applicable, the SSC decommissioning operation should not encounter any difficulty in complying with potentially applicable regulatory constraints. Upon completion of decommissioning, the SSC site surface could be returned to unrestricted use, but it is recommended that a degree of institutional control and environmental monitoring be carried out for a short period following decommissioning. 11 refs., 8 figs., 6 tabs

  9. Laser activated superconducting switch

    International Nuclear Information System (INIS)

    Wolf, A.A.

    1976-01-01

    A superconducting switch or bistable device is described consisting of a superconductor in a cryogen maintaining a temperature just below the transition temperature, having a window of the proper optical frequency band for passing a laser beam which may impinge on the superconductor when desired. The frequency of the laser is equal to or greater than the optical absorption frequency of the superconducting material and is consistent with the ratio of the gap energy of the switch material to Planck's constant, to cause depairing of electrons, and thereby normalize the superconductor. Some embodiments comprise first and second superconducting metals. Other embodiments feature the two superconducting metals separated by a thin film insulator through which the superconducting electrons tunnel during superconductivity

  10. SSCTRK: A particle tracking code for the SSC

    International Nuclear Information System (INIS)

    Ritson, D.

    1990-07-01

    While many indirect methods are available to evaluate dynamic aperture there appears at this time to be no reliable substitute to tracking particles through realistic machine lattices for a number of turns determined by the storage times. Machine lattices are generated by ''Monte Carlo'' techniques from the expected rms fabrication and survey errors. Any given generated machine can potentially be a lucky or unlucky fluctuation from the average. Therefore simulation to serve as a predictor of future performance must be done for an ensemble of generated machines. Further, several amplitudes and momenta are necessary to predict machine performance. Thus to make Monte Carlo type simulations for the SSC requires very considerable computer resources. Hitherto, it has been assumed that this was not feasible, and alternative indirect methods have been proposed or tried to answer the problem. We reexamined the feasibility of using direct computation. Previous codes have represented lattices by a succession of thin elements separated by bend-drifts. With ''kick-drift'' configurations, tracking time is linear in the multipole order included, and the code is symplectic. Modern vector processors simultaneously handle a large number of cases in parallel. Combining the efficiencies of kick drift tracking with vector processing, in fact, makes realistic Monte Carlo simulation entirely feasible. SSCTRK uses the above features. It is structured to have a very friendly interface, a very wide latitude of choice for cases to be run in parallel, and, by using pure FORTRAN 77, to interchangeably run on a wide variety of computers. We describe in this paper the program structure operational checks and results achieved

  11. Frontiers in Superconducting Materials

    CERN Document Server

    Narlikar, Anant V

    2005-01-01

    Frontiers in Superconducting Materials gives a state-of-the-art report of the most important topics of the current research in superconductive materials and related phenomena. It comprises 30 chapters written by renowned international experts in the field. It is of central interest to researchers and specialists in Physics and Materials Science, both in academic and industrial research, as well as advanced students. It also addresses electronic and electrical engineers. Even non-specialists interested in superconductivity might find some useful answers.

  12. Superconductivity and their applications

    OpenAIRE

    Roque, António; Sousa, Duarte M.; Fernão Pires, Vítor; Margato, Elmano

    2017-01-01

    Trabalho apresentado em International Conference on Renewable Energies and Power Quality (ICREPQ’17), 4 a 6 de Abril de 2017, Málaga, Espanha The research in the field of superconductivity has led to the synthesis of superconducting materials with features that allow you to expand the applicability of this kind of materials. Among the superconducting materials characteristics, the critical temperature of the superconductor is framing the range and type of industrial applications that can b...

  13. Superconducting machines. Chapter 4

    International Nuclear Information System (INIS)

    Appleton, A.D.

    1977-01-01

    A brief account is given of the principles of superconductivity and superconductors. The properties of Nb-Ti superconductors and the method of flux stabilization are described. The basic features of superconducting d.c. machines are illustrated by the use of these machines for ship propulsion, steel-mill drives, industrial drives, aluminium production, and other d.c. power supplies. Superconducting a.c. generators and their design parameters are discussed. (U.K.)

  14. Superconductivity in the actinides

    International Nuclear Information System (INIS)

    Smith, J.L.; Lawson, A.C.

    1985-01-01

    The trends in the occurrence of superconductivity in actinide materials are discussed. Most of them seem to show simple transition metal behavior. However, the superconductivity of americium proves that the f electrons are localized in that element and that ''actinides'' is the correct name for this row of elements. Recently the superconductivity of UBe 13 and UPt 3 has been shown to be extremely unusual, and these compounds fall in the new class of compounds now known as heavy fermion materials

  15. WORKSHOP: Radiofrequency superconductivity

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1984-10-15

    The Second Workshop on Radiofrequency Superconductivity was held at CERN from 23-27 July, four years after the first, organized at Karlsruhe. 35 invited talks were presented to the about 80 participants from Australia, Brazil, Europe, Japan and the United States. For the first time, ten Laboratories operating or planning superconducting accelerators for heavy ions participated and shared their experience with the community proposing the use of superconducting accelerating sections for electron accelerators.

  16. WORKSHOP: Radiofrequency superconductivity

    International Nuclear Information System (INIS)

    Anon.

    1984-01-01

    The Second Workshop on Radiofrequency Superconductivity was held at CERN from 23-27 July, four years after the first, organized at Karlsruhe. 35 invited talks were presented to the about 80 participants from Australia, Brazil, Europe, Japan and the United States. For the first time, ten Laboratories operating or planning superconducting accelerators for heavy ions participated and shared their experience with the community proposing the use of superconducting accelerating sections for electron accelerators

  17. Superconductivity in power engineering

    International Nuclear Information System (INIS)

    1989-01-01

    This proceedings volume presents 24 conference papers and 15 posters dealing with the following aspects: 1) Principles and elementary aspects of high-temperature superconductivity (3 plenary lectures); 2) Preparation, properties and materials requirements of metallic or oxide superconductors (critical current behaviour, soldered joints, structural studies); 3) Magnet technology (large magnets for thermonuclear fusion devices; magnets for particle accelerators and medical devices); 4) Magnetic levitation and superconductivity; 5) Cryogenics; 6) Energy storage systems using superconducting coils (SMES); 7) Superconducting power transmission cables, switches, transformers, and generator systems for power plant; 8) Supporting activities, industrial aspects, patents. There are thirty-eight records in the ENERGY database relating to individual conference papers. (MM) [de

  18. Superconductivity and its application

    International Nuclear Information System (INIS)

    Spadoni, M.

    1988-01-01

    This paper, after a short introduction to superconductivity and to multifilamentary superconducting composites is aiming to review the state of the art and the future perspective of some of the applications of the superconducting materials. The main interest is focussed to large scale applications like, for istance, magnets for accelerators or fusion reactors, superconducting system for NMR thomography, etc. A short paragraph is dedicated to applications for high sensitivity instrumentation. The paper is then concluded by some considerations about the potentialities of the newly discovered high critical temperature materials

  19. Superconducting quantum electronics

    International Nuclear Information System (INIS)

    Kose, V.

    1989-01-01

    This book reviews recent accomplishments, presents new results and discusses possible future developments of superconducting quantum electronics and high T c superconductivity. The three main parts of the book deal with fundamentals, sensitive detectors, and precision metrology. New results reported include: correct equivalent circuits modelling superconducting electronic devices; exact solution of the Mattis-Bardeen equations describing various experiments for thin films; complete theoretical description and experimental results for a new broad band spectrum analyzer; a new Josephson junction potentiometer allowing tracing of unknown voltage ratios back to well-known frequency ratios; and fast superconducting SQUID shift registers enabling the production of calculable noise power spectra in the microwave region

  20. Superconducting linear accelerator cryostat

    International Nuclear Information System (INIS)

    Ben-Zvi, I.; Elkonin, B.V.; Sokolowski, J.S.

    1984-01-01

    A large vertical cryostat for a superconducting linear accelerator using quarter wave resonators has been developed. The essential technical details, operational experience and performance are described. (author)