WorldWideScience

Sample records for a-3 test stand

  1. Steel erected at A-3 Test Stand

    2008-01-01

    Workers erect the first fabricated steel girders to arrive at the A-3 Test Stand at Stennis Space Center. Steel work began at the construction site Oct. 29 and is scheduled to continue into next spring.

  2. TMS delivered for A-3 Test Stand

    2010-01-01

    A state-of-the-art thrust measurement system for the A-3 Test Stand under construction at NASA's John C. Stennis Space Center was delivered March 17. Once completed, the A-3 stand (seen in background) will allow simulated high-altitude testing on the next generation of rocket engines for America's space program. Work on the stand began in 2007, with activation scheduled for 2012. The stand is the first major test structure to be built at Stennis since the 1960s. The recently delivered TMS was fabricated by Thrust Measurement Systems in Illinois. It is an advanced calibration system capable of measuring vertical and horizontal thrust loads with an accuracy within 0.15 percent at 225,000 pounds.

  3. Isopropyl alcohol tank installed at A-3 Test Stand

    2009-01-01

    An isopropyl alcohol (IPA) tank is lifted into place at the A-3 Test Stand being built at NASA's John C. Stennis Space Center. Fourteen IPA, water and liquid oxygen (LOX) tanks are being installed to support the chemical steam generators to be used on the A-3 Test Stand. The IPA and LOX tanks will provide fuel for the generators. The water will allow the generators to produce steam that will be used to reduce pressure inside the stand's test cell diffuser, enabling operators to simulate altitudes up to 100,000 feet. In that way, operators can perform the tests needed on rocket engines being built to carry humans back to the moon and possibly beyond. The A-3 Test Stand is set for completion and activation in 2011.

  4. Engineers conduct key water test for A-3 stand

    2009-01-01

    Water cascades from the A-2 Test Stand at Stennis Space Center as engineers challenge the limits of the high-pressure water system as part of the preparation process for the A-3 Test Stand under construction. Jeff Henderson, test director for Stennis' A Complex, led a series of tests Nov. 16-20, flowing water simultaneously on the A-1 and A-2 stands, followed by the A-1 and B-1 stands, to determine if the high-pressure industrial water facility pumps and the existing pipe system can support the needs of the A-3 stand. The stand is being built to test rocket engines that will carry astronauts beyond low-Earth orbit and will need about 300,000 gallons of water per minute when operating, but the Stennis system never had been tested to that level. The recent tests were successful in showing the water facility pumps can operate at that capacity - reaching 318,000 gallons per minute in one instance. However, officials continue to analyze data to determine if the system can provide the necessary pressure at that capacity and if the delivery system piping is adequate. 'We just think if there's a problem, it's better to identify and address it now rather than when A-3 is finished and it has to be dealt with,' Henderson said.

  5. The SPL Front End: A 3 MeV$H^{-}$ Test Stand at CERN

    Rossi, C; Caspers, Friedhelm; Garoby, R; Genest, J; Hanke, K; Hori, Masaki; Küchler, D; Lombardi, A M; Magistris, M; Millich, Antonio; Paoluzzi, M; Sargsyan, E; Silari, M; Steiner, T; Vretenar, M; Beauvais, Pierre Yves; Ausset, P; LINAC'04

    2004-01-01

    In the frame of the SPL (Superconducting Proton Linac) study at CERN, a new 160 MeV proton injector for the CERN PS Booster is presently under development. This linear accelerator (Linac4) would not only be a first step towards a future, multi-MW superconducting linac, but would also improve in the medium term both the beam availability and beam quality for CERN’s proton users. Within the framework of the Linac4 study and with the support of the EU funded Joint Research Activity HIPPI (High Intensity Pulsed Proton Injectors), a 3 MeV test stand is under construction at CERN. This test stand will explore some of the most critical issues of the linac, such as the beam dynamics at low energy, with special emphasis on the chopper line that has been designed to generate the required time structure of the beam, to clean the beam halo, and to match it to the subsequent RF structures. In this context, a new Beam Shape and Halo Monitor is under construction. The beam acceleration will be performed by an RFQ that is ...

  6. Variable Attitude Test Stand

    Federal Laboratory Consortium — The Variable Attitude Test Stand designed and built for testing of the V-22 tilt rotor aircraft propulsion system, is used to evaluate the effect of aircraft flight...

  7. High Brightness Test Stand

    The High Brightness Test Stand is a 2 MeV, less than or equal to 10 kA electron accelerator module. This accelerator module, designed as an upgrade prototype for the Advanced Test Accelerator (ATA), combines solid state nonlinear magnetic drives with state-of-the-art induction linac technology. The facility serves a dual role, as it not only provides a test bed for this new technology, but is used to develop high brightness electron optics. We will both further describe the accelerator, as well as present some of the preliminary electron optics measurements

  8. Multi-Purpose Test Stand

    Federal Laboratory Consortium — The Multi-Purpose Test Stand is used for a wide variety of tests. The Stand is designed to be rotated through a range of fixed yaw positions to allow engines to be...

  9. Beam optics test stand

    The authors have constructed a beam optics test stand in order to study adaptive charged particle optics. A low energy, continuous electron beam is used to model a high energy negative ion beam. In addition, the beam can be used as a diagnostic probe to study the correction of spherical aberrations in a solenoid lens. The authors test stand design stresses versatility. The conical glass vacuum system has reentrant electron and diagnostic chambers that allow immediate experimental modifications. As an integral part of the vacuum system, the solenoid lens also serves as structural support for grid focusing systems. Vacuum pumping is provided by an 8'' cryopump and the entire system can be moved about freely. Computer control and data acquisition are interfaced to the beam control and diagnostics. A post acceleration grid and deflection plates have been added to a commercial electron gun to produce a 10 keV beam at 100 μA. The diagnostics consist of phosphor screens, a charge-coupled photodiode array, and an image dissector

  10. Crush Test Abuse Stand

    Collins, Jacob; Jeevarajan, Judith; Salinas, Mike

    2011-01-01

    The purpose of this system is to simulate an internal short on battery cells by causing deformation (a crushing force) in a cell without penetration. This is performed by activating a hydraulic cylinder on one side of a blast wall with a hydraulic pump located on the other. The operator can control the rate of the crush by monitoring a local pressure gauge connected to the hydraulic cylinder or a load cell digital display located at the hydraulic pump control area. The internal short simulated would be considered a worst-case scenario of a manufacturer fs defect. This is a catastrophic failure of a cell and could be a very destructive event. Fully charged cells are to have an internal short simulated at the center of the length of the cell (away from terminals). The crush can be performed with a .- to 1-in. (.0.6- to 2.5-cm) rod placed crossways to the cell axis, causing deformation of the cell without penetration. The OCV (open-circuit voltage) and temperature of the cells, as well as the pressure and crushing force, are recorded during the operation. Occurrence of an internal short accompanied by any visible physical changes such as venting, fires, or explosions is reported. Typical analytical data examined after the test would be plots of voltage, temperature, and pressure or force versus time. The rate of crushing force can be increased or decreased based on how fast the operator pumps the hydraulic pump. The size of cylinder used to compress the battery cell can be easily changed by adding larger or smaller fittings onto the end of the hydraulic cylinder based on the battery/cell size being tested. The cell is crushed remotely and videotaped, allowing the operator to closely monitor the situation from a safe distance.

  11. High-voltage test stand at Livermore

    This paper describes the present design and future capability of the high-voltage test stand for neutral-beam sources at Lawrence Livermore Laboratory. The stand's immediate use will be for testing the full-scale sources (120 kV, 65 A) for the Tokamak Fusion Test Reactor. It will then be used to test parts of the sustaining source system (80 kV, 85 A) being designed for the Magnetic Fusion Test Facility. Following that will be an intensive effort to develop beams of up to 200 kV at 20 A by accelerating negative ions. The design of the test stand features a 5-MVA power supply feeding a vacuum tetrode that is used as a switch and regulator. The 500-kW arc supply and the 100-kW filament supply for the neutral-beam source are battery powered, thus eliminating one or two costly isolation transformers

  12. Electrohydraulic stand for testing lifting means

    Natalya Babochenko

    2014-01-01

    Article is devoted to electrohydraulic to create test benches for lifting equipment. The author suggests a test stand electrohydraulic lifting means in the form of large-scale working model of the hinge-rod hydraulic manipulator with articulated boom and with one space drive mechanism, as well as examining the use of electrohydraulic control system.

  13. Beam instrumentation for an ISOL test stand

    TRIUMF is constructing a test bed for the first stages of the proposed TISAC accelerated radioactive beam facility. We will present the requirements for the diagnostic system for this test stand and describe the design and development work underway. Scintillators, beamstops and Faraday Cup have been tested using stable, mass analyzed, 12 keV beams of ions from mass 14 to 132. The design of a linear drive, with 10 μm resolution, for scanning wires and slits has begun. (author)

  14. TMS installation at A-1 Test Stand

    2010-01-01

    Employees at NASA's John C. Stennis Space Center complete installation of the new thrust measurement system on the A-1 Test Stand. The new TMS is a state-of-the-art upgrade from the previous system, which was installed when the testing structure was built in the 1960s. It is an advanced calibration system capable of measuring vertical and horizontal thrust loads with accuracy within 0.15 percent at 225,000 pounds. It also will allow engineers to measure thrust as they gimbal (or tilt) engines during tests. The new TMS is part of upgrades for the A-1 Test Stand in preparation for testing the next generation of American space program rocket engines.

  15. Optimal testing of stand-by systems

    The optimal test policy for a safety stand-by system is considered. In this paper we introduce a closed loop policy: the tests are not fixed in advance but a testing decision can be taken at any time. The method of dynamic programming is used to find the optimal policy in the case of a single unit and of a two-unit redundant system. The results are compared with those that would be obtained in the case where the testing policy is fixed in advance. The subject is discussed in relation to nuclear power plants. (author)

  16. Test Stand for Linear Induction Accelerator Optimization

    Lawrence Livermore National Laboratory has designed and constructed a test stand to improve the voltage regulation in our Flash X-Ray (FXR) accelerator cell. The goal is to create a more mono-energetic electron beam that will create an x-ray source with a smaller spot size. Studying the interaction of the beam and pulse-power system with the accelerator cell will improve the design of high-current accelerators at Livermore and elsewhere. On the test stand, a standard FXR cell is driven by a flexible pulse-power system and the beam current is simulated with a switched center conductor. The test stand is fully instrumented with high-speed digitizers to document the effect of impedance mismatches when the cell is operated under various full-voltage conditions. A time-domain reflectometry technique was also developed to characterize the beam and cell interactions by measuring the impedance of the accelerator and pulse-power component. Computer models are being developed in parallel with the testing program to validate the measurements and evaluate different design changes. Both 3D transient electromagnetic and circuit models are being used

  17. Engineering design of vertical test stand cryostat

    Under Indian Institutions and Fermilab collaboration, Raja Ramanna Centre for Advanced Technology and Fermi National Accelerator Laboratory are jointly developing 2K Vertical Test Stand (VTS) cryostats for testing SCRF cavities at 2K. The VTS cryostat has been designed for a large testing aperture of 86.36 cm for testing of 325 MHz Spoke resonators, 650 MHz and 1.3 GHz multi-cell SCRF cavities for Fermilab's Project-X. Units will be installed at Fermilab and RRCAT and used to test cavities for Project-X. A VTS cryostat comprises of liquid helium (LHe) vessel with internal magnetic shield, top insert plate equipped with cavity support stand and radiation shield, liquid nitrogen (LN2) shield and vacuum vessel with external magnetic shield. The engineering design and analysis of VTS cryostat has been carried out using ASME B and PV Code and Finite Element Analysis. Design of internal and external magnetic shields was performed to limit the magnetic field inside LHe vessel at the cavity surface 2 shield has been performed to check the effectiveness of LN2 cooling and for compliance with ASME piping code allowable stresses.

  18. Stand for testing the electrical race car engine

    Baier, M.; Franiasz, J.; Mierzwa, P.; Wylenzek, D.

    2015-11-01

    An engine test stand created especially for research of electrical race car is described in the paper. The car is an aim of Silesian Greenpower project whose participants build and test electrical vehicles to take part in international races in Great Britain. The engine test stand is used to test and measure the characteristics of vehicles and their engines. It has been designed particularly to test the electric cars engineered by students of Silesian Greenpower project. The article contains a description how the test stand works and shows its versatility in many areas. The paper presents both construction of the test stand, control system and sample results of conducted research. The engine test stand was designed and modified using PLM Siemens NX 8.5. The construction of the test stand is highly modular, which means it can be used both for testing the vehicle itself or for tests without the vehicle. The test stand has its own wheel, motor, powertrain and braking system with second engine. Such solution enables verifying various concepts without changing the construction of the vehicle. The control system and measurement system are realized by enabling National Instruments product myRIO (RIO - Reconfigurable Input/Output). This controller in combination with powerful LabVIEW environment performs as an advanced tool to control torque and speed simultaneously. It is crucial as far as the test stand is equipped in two motors - the one being tested and the braking one. The feedback loop is realized by an optical encoder cooperating with the rotor mounted on the wheel. The results of tests are shown live on the screen both as a chart and as single values. After performing several tests there is a report generated. The engine test stand is widely used during process of the Silesian Greenpower vehicle design. Its versatility enables powertrain testing, wheels and tires tests, thermal analysis and more.

  19. Down force calibration stand test report

    The Down Force Calibration Stand was developed to provide an improved means of calibrating equipment used to apply, display and record Core Sample Truck (CST) down force. Originally, four springs were used in parallel to provide a system of resistance that allowed increasing force over increasing displacement. This spring system, though originally deemed adequate, was eventually found to be unstable laterally. For this reason, it was determined that a new method for resisting down force was needed

  20. Heat transfer simulation of a solar test stand

    A transient heat transfer model for a solar test stand is presented here to predict temperatures of the absorber plates on a solar test stand, instead of consuming excessive time to conduct numerous experiments. Three zones are defined in this model for the test stand: glass, enclosed-air, plates/insulation layers. A radiation model for the glass layer is developed here to achieve more accurate simulation. This model combines a cold medium without scattering approximation for solar irradiation together with optically thick approximation for infrared thermal radiation, thereby simplifying the spectral dependence on the semitransparent medium of glass. The numerical simulation to obtain three-dimensional transient temperature predictions is made with the finite-volume discretization and alternating directional implicit (ADI) scheme together with the Crank–Nicolson approach. In addition, the coupling effects on the interfacial boundary are handled by the iterative method. The model is validated by comparing the measured temperatures with the predicted ones at selected positions. It is found that the deviations between measured and predicted temperatures on the absorbing plates fall within 3 K (about 1%), which validates the computational model developed in this study. - Highlights: • A 3D transient heat transfer model for a simple solar collector is developed. • Heat transfer processes in the solar collector with absorbing glazing are analyzed. • Radiative heat transfer is handled by using two main spectral bands in the system. • Predictions are in satisfactory agreement with the experimental results. • Experiments are conducted to provide the data for model validation

  1. First measurements with the test stand for optical beam tomography

    Wagner, Christopher; Meusel, Oliver; Ulrich, Ratzinger; Reichau, Hermine

    2011-01-01

    A test stand for optical beam tomography was developed. As a new non-destructive beam-diagnostic system for high current ion beams, the test stand will be installed in the low energy beam transport section (LEBT) of the Frankfurt Neutron Source (FRANZ) behind the chopper system. The test stand consists of a rotatable vacuum chamber with a mounted CCD camera. The maximum rotation angle amounts to 270°. In a first phase the optical beam profile measurement and 3D density reconstruction is teste...

  2. Engine Test Stand Design Constraints Expert System Project

    National Aeronautics and Space Administration — Propulsion test stands are designed for thermal and pressure loads for certain classes of engines. These plume induced loads are: radiative heating, acoustics and...

  3. Spallation Neutron Source High-Power Protection Module Test Stand

    The Spallation Neutron Source (SNS) High-Power Protection Module (HPM) provides interlocks and fast shutdown for the radio frequency (RF) system to protect the accelerating structures and high power RF (HPRF) Distribution System. The HPM has required some functional upgrades since the start of beam operations and an upgrade to the HPM test stand was required to support these added features. The HPM test stand currently verifies functionality, RF channel calibration, and measurement of the speed of shutdown to ensure the specifications are met. The upgraded test stand was implemented in a Field Programmable Gate Array (FPGA) to allow for future growth and flexibility. Work is currently progressing on automation of the test stand to better perform the required module calibration schedule.

  4. The Advanced Photon Source Injector Test Stand Control System

    MacLean, J F

    2001-01-01

    The Advanced Photon Source (APS) primary and backup injectors consist of two thermionic-cathode rf guns. These guns are being upgraded to provide improved performance, to improve ease of maintenance, and to reduce downtime required for repair or replacement of a failed injector. As part of the process, an injector test stand is being prepared. This stand is effectively independent of the APS linac and will allow for complete characterization and validation of an injector prior to its installation into the APS linac. A modular control system for the test stand has been developed using standard APS control solutions with EPICS to deliver a flexible and comprehensive control system. The modularity of the system will allow both the future expansion of test stand functionality and the evaluation of new control techniques and solutions.

  5. The stand-alone test and decreasing serial cost sharing

    Hougaard, Jens Leth; Thorlund-Petersen, Lars

    2000-01-01

    The rule of decreasing serial cost sharing defined in de Frutos [1] over the class of concave cost functions may violate the important stand-alone test. Sufficient conditions for the test to be satisfied are given, in terms of individual rationality as well as coalitional stability. These conditi......The rule of decreasing serial cost sharing defined in de Frutos [1] over the class of concave cost functions may violate the important stand-alone test. Sufficient conditions for the test to be satisfied are given, in terms of individual rationality as well as coalitional stability...

  6. Uppsala High Power Test Stand for ESS Spoke Cavities

    Yogi, RA; Dancila, D; Gajewski, K; Hermansson, L; Noor, M; Wedberg, R; Santiago-Kern, R; Ekelöf, T; Lofnes, T; Ziemann, V; Goryashko, V; Ruber, R

    2013-01-01

    The European Spallation Source (ESS) is one of the world’s most powerful neutron source. The ESS linac will accelerate 50mA pulse current of protons to 2.5GeV in 2.86 ms long pulses at a repetition rate of 14 Hz. It produces a beam with 5MW average power and 125MW peak power. ESS Spoke Linac consist of 28 superconducting spoke cavities, which will be developed by IPN Orsay, France. These Spoke Cavities will be tested at low power at IPN Orsay and high power testing will be performed in a high power test stand at Uppsala University. The test stand consists of tetrode based RF amplifier chain (352MHz, 350 kW) power and related RF distribution. Outputs of two tetrodes shall be combined with the hybrid coupler to produce 350 kW power. Preamplifier for a tetrode shall be solid state amplifier. As the spoke cavities are superconducting, the test stand also includes horizontal cryostat, Helium liquefier, test bunker etc. The paper describes features of the test stand in details.

  7. Analysis of seated and standing triple Wingate tests.

    Wilson, Robert W; Snyder, Ann C; Dorman, Jason C

    2009-05-01

    Observations of athletes in seated and standing cycling positions in laboratory and field settings have led to the perception that they produce different outputs. The purpose of this study was to determine whether there are differences in power output and physiological responses between seated and standing positions of athletes during 3 consecutive Wingate tests. Seven (n = 7) elite-level speedskaters completed 3 x 30-second Wingate tests (resistance = 7.5% body weight) with 3.5 minutes of recovery between each test in both seated and standing positions. During the recovery period, athletes pedaled against no resistance in the seated position. Testing was randomized and separated by at least 48 hours. Power output, heart rate, blood lactate, and muscle oxygenation data were collected. Statistical analysis of comparable tests (i.e., seated Wingate test 1 [WinD1] compared with standing Wingate test 1 [WinU1]; WinD2:WinU2; WinD3:WinU3) revealed no significant differences between the seated and standing variables. Position during a short-duration maximal-effort exercise test on a stationary bike did not produce statistically different results in power, maximal heart rate, blood lactate, or muscle oxygenation. As no differences were detected between positions, practitioners can allow subjects to choose their position. Also, if a subject rises out of the seat during a "seated" test, this change may not affect the subject's physiological variables. However, transitioning from one position to the other during the test is not advised due to the possible chance of injury. It should be acknowledged that there may be reasons for stipulating one position over another (e.g., injuries, leg length). PMID:19387391

  8. Design study of a test stand for ITER gyrotron

    In the frame of development of the ITER electron cyclotron wave (ECW) system, a two MW CW coaxial cavity gyrotron will be developed during the Sixth Framework Program (2003-2006). Such development relies on the availability of a test stand capable of providing the electrical energy and cooling capacity. This test stand will possibly be used, in a later stage, for the component test of the ITER ECW system. This paper will first present the main parameters of this new coaxial gyrotron. Then we describe the test stand itself, including the general requirements for testing and evaluating the behaviour of the RF source and then a description of the electrical system design. Compared to the ITER reference design, the test stand emphasises the requirement of flexibility, which is necessary during the development of the gyrotron. The additional electrical equipment is included in the overview of the electrical system. The cooling system will be an important part of the design study. Indeed, the design efficiency of such a depressed collector gyrotron is ∼50%, implying >4 MW of continuous heat dissipation and evacuation by the cooling equipment. The specifications of the cooling system must also comply with ITER reference design values

  9. Method’s and Test Stand for Electronic PID Controller

    Cristian Paul Chioncel

    2009-01-01

    Full Text Available The paper presents method’s and a testing stand for electronic controller using for this a signal generator and a digital oscilloscope respectively the virtual instrumentation and the signal acquisitions from the controllers input and output through an data acquisition board and an PC on that Lab View program runs.

  10. Optimisation of the test policy of stand-by systems

    In a nuclear power plant there are several systems which are on stand-by position as, for instance, safety systems. These stand-by systems have to be ready to start as soon as any situation for which they have be designed occurs. A test policy is then necessary in order to know the state of such a system and repair the possible failures. The tests are normally performed at regular intervals of time according to a scheduled sequence. We have already shown during the 'IIIeme Congres National de Fiabilite' held in Perros-Guirec in 1976 how it is possible in this case to find the optimum test interval leading to the best mean availability of the system. It is, in fact, possible, to improve that by considering that if the test interval is fixed 'a priori' this does not allow to take into account information we have on the system state every time

  11. A3 Subscale Diffuser Test Article Design

    Saunders, G. P.

    2009-01-01

    This paper gives a detailed description of the design of the A3 Subscale Diffuser Test (SDT) Article Design. The subscale diffuser is a geometrically accurate scale model of the A3 altitude rocket facility. It was designed and built to support the SDT risk mitigation project located at the E3 facility at Stennis Space Center, MS (SSC) supporting the design and construction of the A3 facility at SSC. The subscale test article is outfitted with a large array of instrumentation to support the design verification of the A3 facility. The mechanical design of the subscale diffuser and test instrumentation are described here

  12. Stand for visual ultrasonic testing of spent fuel

    A stand for visual and ultrasonic testing of spent fuel, constructed under Strategic Governmental Programme for management of spent fuel and radioactive waste, is presented in the paper. The stand, named 'STEND-1', built up at the Institute of Atomic Energy in Swjerk, is appointed for underwater visual testing of spent fuel elements type MR6 and WWR by means of TV-CCD camera and image processing system and for ultrasonic scanning of external surface of these elements by means of video scan immersion transducer and straight UHT connector. 'STEND-1' is built using flexible in use, high-tensile, anodized aluminum profiles. All the profiles feature longitudinal grooves to accommodate connecting elements and for the attachment of accessories at any position. They are also characterised by straight-through core bores for use with standard fastening elements and to accommodate accessory components. Stand, equipped with automatic control and processing system based on personal computer, may be manually or automatically controlled. Control system of movements of the camera in the vertical axis and rotational movement of spent fuel element permits to fix chosen location of fuel element with accuracy better than 0.1 mm. High resolution of ultrasonic method allows to record damages of outer surface of order 0.1 mm. The results of visual testing of spent fuel are recorded on video tape and then may be stored on the hard disc of the personal computer and presented in shape of photo or picture. Only selected damage surfaces of spent fuel elements are tested by means of ultrasonic scanning. All possibilities of the stand and results of visual testing of spent fuel type WWR are presented in the paper. (author)

  13. A Test Stand System for High-Energy Physics Applications

    Cardoso, Guilherme; Andresen, Jeff; Chramowicz, John; Deuerling, Greg; Menasce, Dario; Prosser, Alan; Rivera, Ryan; Uplegger, Lorenzo

    2007-01-01

    The Front-End R&D group at Fermilab has been developing pixel hybridized modules and silicon strip detectors for the past decade for high-energy physics experiments. To accomplish this goal, one of the activities the group has been working on includes the development of a flexible high-speed and high-bandwidth data acquisition and test system to characterize front-end electronics. In this paper, we present a general purpose PCI-based test stand system developed to meet the stringent requirements of testing silicon strip and pixel detectors. The test stand is based on a platform that is flexible enough to be adapted to different types of front-end electronics. This system has been used to test the performance of the electronics for different experiments such as BTeV, CDF, CMS, and Phenix. The paper presents the capabilities of the system and how it can be adapted to meet the testing requirements of different applications.

  14. The cathode test stand for the DARHT second-axis

    The injector for the DARHT second-axis injector will use an 8-in. thermionic dispenser cathode. Because the cathode is relatively large and requires a large amount of heat (5 kW) there are certain engineering issues that need to be addressed, before the DARHT injector reaches the final design stage. The Cathode Test Stand (CTS) will be used to address those concerns. The CTS is a new facility, presently under construction. The CTS will consist of a high-voltage pulse modulator, a high-vacuum diode test-chamber, and a short beam-transport section with diagnostics. This paper discusses the status of the project

  15. High-Voltage Terminal Test of Test Stand for 1-MV Electrostatic Accelerator

    Park, Sae-Hoon

    2015-01-01

    The Korea Multipurpose Accelerator Complex (KOMAC) has been developing a 300-kV test stand for a 1-MV electrostatic accelerator ion source. The ion source and accelerating tube will be installed in a high-pressure vessel. The ion source in the high-pressure vessel is required to have a high reliability. The test stand has been proposed and developed to confirm the stable operating conditions of the ion source. The ion source will be tested at the test stand to verify the long-time operating conditions. The test stand comprises a 300-kV high-voltage terminal, a battery for the ion-source power, a 60-Hz inverter, 200-MHz RF power, a 5-kV extraction power supply, a 300-kV accelerating tube, and a vacuum system. The results of the 300-kV high-voltage terminal tests are presented in this paper.

  16. Testing stand for cosmic gas-cooling fast reactor's sample

    For carrying out of technical decision and nuclear, radiation and technological safety of gas-cooling space nuclear power plants is elaborating gas-cooling fast reactor's testing stand. In the base of its draft is taken conception of the reactor with filling up type reactor core on the base of ball fuel elements and radial coolant flowing. On the testing stand would suggested carrying out testing for study neutron and physical parameters of gas-cooling reactor, its behaviour under accident simulation. In the reactor core will suggest use carbon nitrides fuel elements with tungsten cover, provides under nominal regime relatively low fission products yield to first contour of device. Construction of fuel element was carrying out on reactor and non reactor testing and its calculated on working resource about 3000 hours. Constructive materials of reactor core have lower melting temperature, that provides organized in good time remove fuel element to containers placed under reactor in case connected with hypothetical accident. In the construction of reactor for seen tree-contours system of heat transfer and its provides multistage system of barriers against fission products yield to environment. tabs.1

  17. Optical test stand for SiPM characterisation

    Silicon photomultipliers (SiPMs) are versatile and hence interesting semiconductor based detectors for detection of single photons. This makes SiPMs ideal detectors for particle and astroparticle physics experiments. The SiPM characteristics include absolute and relative photon detection efficiency (PDE) and furthermore noise phenomena such as after pulsing and optical crosstalk as well as thermal noise. We have developed a test device, capable of measuring the above in a compact setup featuring devices for pulsing single wavelength LEDs and for providing constant white light that are designed especially for these testing purposes. Readout is carried out via QDC and FADC hardware and all testing mentioned above is integrated in one single setup, running fully automated. One main focus is on the resolution of the optical monochromator for studying the SiPM properties as a function of wavelength. The optical test stand for precision measurements on SiPM characteristics as well as results of these measurements are presented.

  18. TRAVELLING WAVE AND STANDING WAVE SINGLE CELL HIGH GRADIENT TESTS

    Accelerating gradient is one of the crucial parameters affecting design, construction and cost of next-generation linear accelerators. Operating accelerating gradient in normal conducting accelerating structures is limited by rf breakdown. In this paper we describe an experimental setup for study of these limits for 11.4 GHz travelingwave and standing-wave accelerating structures. The setup uses matched mode converters that launch the circular TM01 mode into short test structures. The test structures are designed so that the electromagnetic fields in one cell mimic the fields in prototype structures for the Next Linear Collider. Fields elsewhere in the test structures and in the mode converters are significantly lower than in this single cell. This setup allows economic testing of different cell geometries, cell materials and preparation techniques with short turn around time. Here we present design considerations and describe planned experiments

  19. Traveling Wave and Standing Wave Single Cell High Gradient Tests

    Dolgashev, V A

    2004-01-01

    Accelerating gradient is one of the crucial parameters affecting design, construction and cost of next-generation linear accelerators. Operating accelerating gradient in normal conducting accelerating structures is limited by rf breakdown. In this paper we describe an experimental setup for study of these limits for 11.4 GHz traveling-wave and standing-wave accelerating structures. The setup uses matched mode converters that launch the circular TM01 mode and short test structures. The test structures are designed so that the electromagnetic fields in one cell mimic the fields in prototype structures for the Next Linear Collider. Fields elsewhere in the test structures and in the mode converters are significantly lower then in this single cell. This setup allows economic testing of different cell geometries, cell materials and preparation techniques with short turn around time. In this paper we present design considerations and initial experimental data.

  20. Cryomdoule Test Stand Reduced-Magnetic Support Design at Fermilab

    McGee, Mike [Fermilab; Chandrasekaran, Saravan Kumar [Fermilab; Crawford, Anthony [Fermilab; Harms, Elvin [Fermilab; Leibfritz, Jerry [Fermilab; Wu, Genfa [Fermilab

    2016-06-01

    In a partnership with SLAC National Accelerator Laboratory (SLAC) and Jefferson Lab, Fermilab will assemble and test 17 of the 35 total 1.3 GHz cryomodules for the Linac Coherent Light Source II (LCLS-II) Project. These devices will be tested at Fermilab's Cryomodule Test Facility (CMTF) within the Cryomodule Test Stand (CMTS-1) cave. The problem of magnetic pollution became one of major issues during design stage of the LCLS-II cryomodule as the average quality factor of the accelerating cavities is specified to be 2.7 x 10¹⁰. One of the possible ways to mitigate the effect of stray magnetic fields and to keep it below the goal of 5 mGauss involves the application of low permeable materials. Initial permeability and magnetic measurement studies regarding the use of 316L stainless steel material indicated that cold work (machining) and heat affected zones from welding would be acceptable.

  1. Control system for the CSNS ion source test stand

    A penning plasma surface H- ion source test stand for the CSNS has just been constructed at the IHEP. In order to achieve a safe and reliable system, nearly all devices of the ion source are designed to have the capability of both local and remote operation function. The control system consists of PLCs and EPICS real-time software tools separately serving device control and monitoring, PLC integration and OPI support. This paper summarizes the hardware and software implementation satisfying the requirements of the ion source control system.(authors)

  2. The Cold Dark Matter Search test stand warm electronics card

    Hines, Bruce; /Colorado U., Denver; Hansen, Sten; /Fermilab; Huber, Martin; /Colorado U., Denver; Kiper, Terry; /Fermilab; Rau, Wolfgang; /Queen' s U., Kingston; Saab, Tarek; /Florida U.; Seitz, Dennis; Sundqvist, Kyle; /UC, Berkeley; Mandic, Vuk; /Minnesota U.

    2010-11-01

    A card which does the signal processing for four SQUID amplifiers and two charge sensitive channels is described. The card performs the same functions as is presently done with two custom 9U x 280mm Eurocard modules, a commercial multi-channel VME digitizer, a PCI to GPIB interface, a PCI to VME interface and a custom built linear power supply. By integrating these functions onto a single card and using the power over Ethernet standard, the infrastructure requirements for instrumenting a Cold Dark Matter Search (CDMS) detector test stand are significantly reduced.

  3. Multi-harmonic RF test stand for RF breakdown studies

    A multi-harmonic RF test stand is under construction at Yale Beam Physics Laboratory. It includes a frequency multiplier which can generate high power harmonics efficiently that are phase locked to the fundamental drive frequency. In a bi-modal asymmetric cavity powered by this RF source, the cavity may experience reduced exposure time to peak fields and sweeping of peak fields across their surfaces, and strong asymmetry between surfaces that may experience cathode-and anode-like fields; these phenomena are to be assessed for their influence on RF breakdown probabilities.

  4. Mobile stand for testing charging machine ram devices

    The equipment described is designed to functional testing of the charging machine (CM) end, in laboratory or NPP conditions, over the span of maintenance activities. It appears to be a portable panel that can be easily coupled to the regulation and control elements of the ram driving systems. Such an equipment occurred as necessary following the analyses of the results and technical problems issued from the technical assistance services which INR Pitesti performed for Cernavoda NPP in the period 1996-1999. The experience acquired from these works resulted in a new design and execution of the CM ram devices the characteristics of which are indicated. The equipment was certified and is now successfully utilized at INR Pitesti and Cernavoda NPP Unit 1. The mobile stand will be used in the near future for testing operations of the CM ends number 4 and 5 destined to Cernavoda NPP Unit 2, planned for year 2002

  5. HESTIA Commodities Exchange Pallet and Sounding Rocket Test Stand

    Chaparro, Javier

    2013-01-01

    During my Spring 2016 internship, my two major contributions were the design of the Commodities Exchange Pallet and the design of a test stand for a 100 pounds-thrust sounding rocket. The Commodities Exchange Pallet is a prototype developed for the Human Exploration Spacecraft Testbed for Integration and Advancement (HESTIA) program. Under the HESTIA initiative the Commodities Exchange Pallet was developed as a method for demonstrating multi-system integration thru the transportation of In-Situ Resource Utilization produced oxygen and water to a human habitat. Ultimately, this prototype's performance will allow for future evaluation of integration, which may lead to the development of a flight capable pallet for future deep-space exploration missions. For HESTIA, my main task was to design the Commodities Exchange Pallet system to be used for completing an integration demonstration. Under the guidance of my mentor, I designed, both, the structural frame and fluid delivery system for the commodities pallet. The fluid delivery system includes a liquid-oxygen to gaseous-oxygen system, a water delivery system, and a carbon-dioxide compressors system. The structural frame is designed to meet safety and transportation requirements, as well as the ability to interface with the ER division's Portable Utility Pallet. The commodities pallet structure also includes independent instrumentation oxygen/water panels for operation and system monitoring. My major accomplishments for the commodities exchange pallet were the completion of the fluid delivery systems and the structural frame designs. In addition, parts selection was completed in order to expedite construction of the prototype, scheduled to begin in May of 2016. Once the commodities pallet is assembled and tested it is expected to complete a fully integrated transfer demonstration with the ISRU unit and the Environmental Control and Life Support System test chamber in September of 2016. In addition to the development of

  6. 3 MeV Test Stand commissioning report

    Bellodi, Guilia; Andreassen, O; Comblin, J-F; Dimov, V; Lallement, J-B; Martin, C; Midttun, O; Ovalle, E; Raich, U; Roncarolo, F; Rossi, C; Scrivens, R; Vollaire, J; Yarmohammadi Satri, M; Zocca, Z

    2013-01-01

    Linac4 is a normal-conducting 160 MeV H- linear accelerator, presently under construction, that will replace the present 50 MeV Linac2 as injector of the CERN proton accelerator complex with the goal of increasing the LHC luminosity. The Linac4 front-end, composed of a 45 keV ion source, a Low Energy Beam Transport (LEBT), a 352.2 MHz Radio Frequency Quadrupole (RFQ) and a Medium Energy Beam Transport (MEBT) housing a beam chopper, was commissioned at the 3 MeV test stand area during the first half of 2013. This report gives details of the installation and operational systems used, describes the commissioning phases and measurements performed and summarizes the results that were finally achieved and the lessons learnt in the process.

  7. Cryogenics for a vertical test stand facility for testing superconducting radio frequency cavities at RRCAT

    Vertical Test Stand (VTS) Facility is located in a newly constructed building of Cryo-Engineering and Cryo-Module Development Division (CCDD). This test facility is one of the important facilities to develop SCRF technologies for superconducting accelerators like Indian Spallation Neutron Source. VTS has to be used for regular testing of the Superconducting Radio Frequency (SRF) Niobium cavities at nominal frequency of 1.3 GHz/ 650 MHz at 4 K / 2 K liquid helium (LHe) bath temperatures. Testing of these cavities at 2 K evaluates cavity processing methods, procedures and would also serve as a pre-qualification test for cavity to test it in horizontal cryostat, called horizontal test stand, with other cavity components such as tuner and helium vessel. Cryogenic technologies play a major role in these cavity testing facilities. Achieving and maintaining a stable temperature of 2 K in these test stands on regular and reliable basis is a challenging task and require broad range of cryogenic expertise, large scale system level understanding and many in-house technological and process developments. Furthermore this test stand will handle large amount of liquid helium. Therefore, an appropriately designed infrastructure is required to handle such large amount of helium gas generated during the operation of VTS .This paper describes the different cryogenic design aspects, initial cryogenic operation results and different cryogenic safety aspects. (author)

  8. Developments in Test Facility and Data Networking for the Altitude Test Stand at the John C. Stennis Space Center: A General Overview

    Hebert, Phillip W.

    2008-01-01

    NASA/SSC's Mission in Rocket Propulsion Testing Is to Acquire Test Performance Data for Verification, Validation and Qualification of Propulsion Systems Hardware: Accurate, Reliable, Comprehensive, and Timely. Data Acquisition in a Rocket Propulsion Test Environment Is Challenging: a) Severe Temporal Transient Dynamic Environments; b) Large Thermal Gradients; c) Vacuum to high pressure regimes. A-3 Test Stand Development is equally challenging with respect to accommodating vacuum environment, operation of a CSG system, and a large quantity of data system and control channels to determine proper engine performance as well as Test Stand operation. SSC is currently in the process of providing modernized DAS, Control Systems, Video, and network systems for the A-3 Test Stand to overcome these challenges.

  9. A high voltage test stand for electron gun qualification for LINACs

    An electron gun lest stand has been developed at RRCAT. The test stand consists of a high voltage pulsed power supply, electron gun filament supply, grid supply, UHV system and electron gun current measurement system. Several electron guns developed indigenously were evaluated on this test stand. The shielding is provided for the electron gun set up. Electron gun tests can be tested upto 55 kV with pulse width of 15 microsecs and pulse repetition rates up to 200 Hz. The technical details of the subsystems are furnished and results of performance of the test stand have been reported in this paper. (author)

  10. System integration and performance of the EUV engineering test stand

    The Engineering Test Stand (ETS) is a developmental lithography tool designed to demonstrate full-field EUV imaging and provide data for commercial-tool development. In the first phase of integration, currently in progress, the ETS is configured using a developmental projection system, while fabrication of an improved projection system proceeds in parallel. The optics in the second projection system have been fabricated to tighter specifications for improved resolution and reduced flare. The projection system is a 4-mirror, 4x-reduction, ring-field design having a numeral aperture of 0.1, which supports 70 nm resolution at a k1 of 0.52. The illuminator produces 13.4 nm radiation from a laser-produced plasma, directs the radiation onto an arc-shaped field of view, and provides an effective fill factor at the pupil plane of 0.7. The ETS is designed for full-field images in step-and-scan mode using vacuum-compatible, magnetically levitated, scanning stages. This paper describes system performance observed during the first phase of integration, including static resist images of 100 nm isolated and dense features

  11. System integration and performance of the EUV engineering test stand

    Tichenor, Daniel A.; Ray-Chaudhuri, Avijit K.; Replogle, William C.; Stulen, Richard H.; Kubiak, Glenn D.; Rockett, Paul D.; Klebanoff, Leonard E.; Jefferson, Karen L.; Leung, Alvin H.; Wronosky, John B.; Hale, Layton C.; Chapman, Henry N.; Taylor, John S.; Folta, James A.; Montcalm, Claude; Soufli, Regina; Spiller, Eberhard; Blaedel, Kenneth; Sommargren, Gary E.; Sweeney, Donald W.; Naulleau, Patrick; Goldberg, Kenneth A.; Gullikson, Eric M.; Bokor, Jeffrey; Batson, Phillip J.; Attwood, David T.; Jackson, Keith H.; Hector, Scott D.; Gwyn, Charles W.; Yan, Pei-Yang; Yan, P.

    2001-03-01

    The Engineering Test Stand (ETS) is a developmental lithography tool designed to demonstrate full-field EUV imaging and provide data for commercial-tool development. In the first phase of integration, currently in progress, the ETS is configured using a developmental projection system, while fabrication of an improved projection system proceeds in parallel. The optics in the second projection system have been fabricated to tighter specifications for improved resolution and reduced flare. The projection system is a 4-mirror, 4x-reduction, ring-field design having a numeral aperture of 0.1, which supports 70 nm resolution at a k{sub 1} of 0.52. The illuminator produces 13.4 nm radiation from a laser-produced plasma, directs the radiation onto an arc-shaped field of view, and provides an effective fill factor at the pupil plane of 0.7. The ETS is designed for full-field images in step-and-scan mode using vacuum-compatible, magnetically levitated, scanning stages. This paper describes system performance observed during the first phase of integration, including static resist images of 100 nm isolated and dense features.

  12. Factors Affecting Test Results and Standardized Method in Quiet Standing Balance Evaluation

    Yoon, Jung Joong; Yoon, Tae Sik; Shin, Bo Mi; Na, Eun Hye

    2012-01-01

    Objective To identify factors affecting test results of the quiet standing balance evaluation conducted by posturography and to investigate the standardized method by comparing results according to feet width. Method The study cohort consisted of 100 healthy individuals. We assessed the quiet standing balance of subjects by using 3 different methods: standing on a force plate with feet width the same as shoulder width (test 1); with feet width the same as half the shoulder width (test 2); wit...

  13. The front end test stand high performance H- ion source at Rutherford Appleton Laboratory.

    Faircloth, D C; Lawrie, S; Letchford, A P; Gabor, C; Wise, P; Whitehead, M; Wood, T; Westall, M; Findlay, D; Perkins, M; Savage, P J; Lee, D A; Pozimski, J K

    2010-02-01

    The aim of the front end test stand (FETS) project is to demonstrate that chopped low energy beams of high quality can be produced. FETS consists of a 60 mA Penning Surface Plasma Ion Source, a three solenoid low energy beam transport, a 3 MeV radio frequency quadrupole, a chopper, and a comprehensive suite of diagnostics. This paper details the design and initial performance of the ion source and the laser profile measurement system. Beam current, profile, and emittance measurements are shown for different operating conditions. PMID:20192390

  14. Measurement properties and feasibility of clinical tests to assess sit-to-stand/stand-to-sit tasks in subjects with neurological disease: a systematic review

    Silva, Paula F. S.; Quintino, Ludmylla F.; Juliane Franco; Christina D. C. M. Faria

    2014-01-01

    BACKGROUND: Subjects with neurological disease (ND) usually show impaired performance during sit-to-stand and stand-to-sit tasks, with a consequent reduction in their mobility levels. OBJECTIVE: To determine the measurement properties and feasibility previously investigated for clinical tests that evaluate sit-to-stand and stand-to-sit in subjects with ND. METHOD: A systematic literature review following the PRISMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) ...

  15. Tests with the emergency condenser at the integral test stand Karlstein for KERENA trademark

    On the new test facility at Karlstein called INKA (Integral Test Stand Karlstein), the key components of the passive safety concept of KERENA trademark - the emergency condenser (EC) and the containment cooling condenser (CCC) - will be tested. Integral system tests will also be performed to show how the passive safety systems interact under various anticipated accident conditions, and to demonstrate the ability of the passive systems to bring the plant to a safe and stable condition without the aid of active systems or actuation by I and C signals. (orig.)

  16. Tests with the emergency condenser at the integral test stand Karlstein for KERENA trademark

    Wagner, Thomas; Wich, Michael; Doll, Mathias; Herbst, Vassili; Uhrig, Stefan [Areva NP GmbH, Karlstein (Germany). NTCTC-G

    2010-05-15

    On the new test facility at Karlstein called INKA (Integral Test Stand Karlstein), the key components of the passive safety concept of KERENA trademark - the emergency condenser (EC) and the containment cooling condenser (CCC) - will be tested. Integral system tests will also be performed to show how the passive safety systems interact under various anticipated accident conditions, and to demonstrate the ability of the passive systems to bring the plant to a safe and stable condition without the aid of active systems or actuation by I and C signals. (orig.)

  17. Stand development and reliability tests of the thermal monitoring means for NPP

    The paper is devoted to the reliability tests of thermoelectric thermometers and resistance thermometers during their operation in the nominal mode. Five stands Reliability are developed and operate for realization of tests of all manufactured thermal converters. delivered at NPP. Description of all stands are presented

  18. Pilot Field Test: Use of a Compression Garment During a Stand Test After Long-Duration Space Flight

    Laurie, S. S.; Stenger, M. B.; Phillips, T. R.; Lee, S. M. C.; Cerisano, J.; Kofman, I.; Reschke, M.

    2016-01-01

    Orthostatic intolerance (OI) is a concern for astronauts returning from long-duration space flight. One countermeasure that has been used to protect against OI after short-duration bed rest and space flight is the use of lower body and abdominal compression garments. However, since the end of the Space Shuttle era we have not been able to test crewmembers during the first 24 hours after landing on Earth. NASA's Pilot Field Test provided us the opportunity to test cardiovascular responses of crewmembers wearing the Russian Kentavr compression garment during a stand test at multiple time points throughout the first 24 hours after landing. HYPOTHESIS We hypothesized that the Kentavr compression garment would prevent an increase in heart rate (HR) >15 bpm during a 3.5-min stand test. METHODS: The Pilot Field Test was conducted up to 3 times during the first 24 hours after crewmembers returned to Earth: (1) either in a tent adjacent to the Soyuz landing site in Kazakhstan (approx.1 hr) or after transportation to the Karaganda airport (approx. 4 hr); (2) during a refueling stop in Scotland (approx.12 hr); and (3) upon return to NASA Johnson Space Center (JSC) (approx.24 hr). We measured HR and arterial pressure (finger photoplethysmography) for 2 min while the crewmember was prone and throughout 3.5 min of quiet standing. Eleven crewmembers consented to participate; however, 2 felt too ill to start the test and 1 stopped 30 sec into the stand portion of the test. Of the remaining 8 crewmembers, 2 did not wear the Russian Kentavr compression garment. Because of inclement weather at the landing site, 5 crewmembers were flown by helicopter to the Karaganda airport before initial testing and received intravenous saline before completing the stand test. One of these crewmembers wore only the portion of the Russian Kentavr compression garment that covered the lower leg and thus lacked thigh and abdominal compression. All crewmembers continued wearing the Russian Kentavr

  19. Development of test stand for experimental investigation of chemical and physical phenomena in Liquid Rocket Engine

    Emerson Andrade Santos; Wilton Fernandes Alves; André Neves Almeida Prado; Cristiane Aparecida Martins

    2011-01-01

    The main objective of this work was to present the specification of an experimental firing test stand for liquid rocket engines (LRE) and develop a program for control and acquisition of data. It provides conditions to test rocket engines with thrust from 50 to 100 kgf. A methodology for laboratory work implementation using information technology, which will allow the automatic and remote functioning of the test stand, permits users to input the necessary data to conduct tests safely, achieve...

  20. A cryogenic test stand for full length SSC magnets with superfluid capability

    The Fermilab Magnet Test Facility performs testing of the full scale SSC magnets on test stands capable of simulating the cryogenic environment of the SSC main ring. One of these test stands, Stand 5, also has the ability to operate the magnet under test at temperatures from 1.8K to 4.5K with either supercritical helium or subcooled liquid, providing at least 25 Watts of refrigeration. At least 50 g/s flow is available from 2.3K to 4.5K, whereas superfluid operation occurs with zero flow. Cooldown time from 4.5K to 1.8K is 1.5 hours. A maximum current capability of 10,000 amps is provided, as is instrumentation to monitor and control the cryogenic conditions. This paper describes the cryogenic design of this test stand. 8 refs., 6 figs

  1. Design and Manufacturing of Pneumatic Test Stand for Rod-less Cylinder vertical application

    Sabigoro, Rocky A.

    2014-01-01

    Within LiU Fluid laboratory there had been a number of hydraulic and pneumatic test stands for research projects and teaching. The effort was needed to do more extension within the field of pneumatics. This thesis was about designing, manufacturing, building and testing the Test Stand for vertical application of pneumatic rodless cylinder. It consisted of three main parts; mechanical structure, pneumatic system and electrical and electronics. The design part focused more on the mechanical str...

  2. Construction of control system for J-PARC RF ion source and RFQ III test stand

    The installation of Cs-seeded RF-driven H- ion source (RF ion source) to J-PARC LINAC is scheduled in 2014, as well as the replacement of the current RFQ to RFQ III. The test stand of RF ion source and RFQ III has been completed in the J-PARC LINAC building for the beam acceleration test. We designed test stand control system in consideration of compatibility with J-PARC accelerator. In order to protect devices, the same MPS was adopted and EPICS was implemented on the test stand. The timing system was constructed for sending a timing signal to each accelerator component device. This report describes construction of the control system in the test stand. (author)

  3. Beam Extraction for 1-MV Electrostatic Accelerator at the 300 kV Test Stand

    The Korea Multipurpose Accelerator Complex (KOMAC) has been developing a 300-kV test stand for a 1-MV electrostatic accelerator ion source. The ion source in the high-pressure vessel is required to have a high reliability. The test stand has been proposed and developed to confirm the stable operating conditions of the ion source. The ion source will be tested at the test stand to verify the long-time operating conditions. The test stand comprises a 300-kV high-voltage terminal, a battery for the ion-source power, a 60-Hz inverter, 200-MHz RF power, a 5-kV extraction power supply, a 300-kV accelerating tube, and a vacuum system. A beam extraction experiment for the test stand was performed, and the beam current was measured using a faraday cup in the chamber. A beam extraction results for the RF ion source will be presented. Beam extraction from the RF ion source of the test stand is verified by measuring the beam current with a faraday cup in the chamber. Thus far NI Labview, PLC and faraday cup have been used to measure the beam current. The OPC server is useful for monitoring the PLC values. The average beam current of (a), (b) and (c) shown in figure 2 are 110.241µA, 105.8597µA and 103.5278µA respectively

  4. Reliability of Arm Curl and Chair Stand tests for assessing muscular endurance in older people

    Boneth M

    2012-05-01

    Full Text Available Objective: to assess the test-retest reliability and level of agreement between measures of the 30 second (30-s Arm Curl and 30-s Chair Stand test in a sample of older adults from Bucaramanga. Materials and methods: a study of evaluation of diagnostic technology was done. Both tests were administered by the same evaluator to 111 adults older than 59 year-old (70,4 ± 7,3, on two occasions, with an interval of time between measures of 4 to 8 days. In the analysis, test-retest reliability was determined using the Intraclass Correlation Coefficient ICC= 2,1 with their confidence interval 95% (CI 95% respective. The agreement level was established by the Bland and Altman method. Results: the test-retest reproducibility of the 30-s Arm Curl test was very good ICC= 0,88 and to the Chair Stand test was good ICC= 0,78. The agreement was very good for both tests of muscle endurance. The CI 95% were between -3,8 and 3,2 stands to 30-s Chair Stand test and between -3,1 and 2,8 curls to 30-s Arm Curl test. Conclusion: the 30-s Arm Curl and 30-s Chair Stand test have good reliability and agreement to assess muscle endurance in older adults functionally independent.

  5. Stanowisko testowe z miedzianą strukturą typu TESLA (Test stand with copper TESLA structure)

    Glowka, J; Macias, M; Czuba, K.; Pozniak, K.; Romaniuk, R.

    2009-01-01

    The paper presents preparation of a copper TESLA structure for the use in laboratory test stand. Standing wave principle of operation of the structure and basic characteristics are described. Sturucture tuning procedure is discussed and tuning results are presented. Construction of laboratory test stand is shortly dscribed. Sample results obtained from test stand control system are presented and discussed. Structures are tested for FEL applications. The paper has a wide didactic nature for st...

  6. Results from the Bo Liquid Argon Scintillation Test Stand at Fermilab

    In these proceedings I discuss results from the Bo test stand at the Proton Assembly Building, Fermilab. This test stand has been used to characterize elements of the MicroBooNE optical system as well as to perform studies of processes affecting argon scintillation light such as scintillation quenching and optical absorption by impurities. I review in detail a recent measurement of the absorption of liquid argon scintillation light by dissolved nitrogen at the part-per-million level

  7. Results of Beam Tests on a High Current EBIS Test Stand

    At Brookhaven National Laboratory there is an R and D program to design an Electron Beam Ion Source (EBIS) for use in a compact ion injector to be developed for the relativistic heavy ion collider (RHIC). The BNL effort is directed at developing an EBIS with intensities of 3 x 109 particles/pulse of ions such as Au35+ and U45+, and requires an electron beam on the order of 10A. The construction of a test stand (EBTS) with the full electron beam power and 1/3 the length of the EBIS for RHIC is nearing completion. Initial commissioning of the EBTS was made with pulsed electron beams of duration < 1 ms and current up to 13 A. Details of the EBTS construction, results of the pulse tests, and preparations for DC electron beam tests are presented

  8. A test stand for off-line laser ion source development at TRIUMF

    A test stand for ion source development and laser resonance ionization spectroscopy was built and commissioned at TRIUMF. The test stand is needed to develop efficient ion sources that can function reliably in the hostile, high temperature, high radiation environment of TRIUMF's isotope separator on-line (ISOL) production target ion source. In addition, it enables laser resonance ionization spectroscopy to develop laser excitation schemes suitable for the solid-state laser systems used with TRIUMF's resonant ionization laser ion source . Also, it allows for possible improvement of current ion sources and validation of new designs. The test stand employs a copy of the ion optics used on-line, so that results can be transferred directly to radioactive ion beam production. Due to space restrictions and the need for rapid mass scans, a quadrupole mass spectrometer is used as a mass separator. One of the first experiments conducted on the laser ion source test stand (LIS STAND) was resonant ionization spectroscopy of gallium to improve on the ionization scheme previously used on-line, so that low yield isotopes (e.g., 62Ga) become available for experiments. Different Rydberg series in gallium were observed and autoionizing states were searched for. The overall LIS STAND system performance, characteristics, and the first resonant ionization spectroscopy are described.

  9. The cryogenic system for the MTL magnet test stands

    This paper briefly describes the cryogenic test capabilities of the Magnet Test Laboratory (MTL). The instrumentation for controlling the operating condition of the magnet cryogenic test and for verifying the requirements of the SSC magnet performance is introduced. The development of the thermometer system, particularly the He vapor pressure thermometers with differential pressure transducer, is presented in detail. The 10-kA vapor-cooled power leads were optimized thermally, with consideration for the different fin shapes, diameters, lengths, and RRRs of the power lead material. Two mechanical designs were introduced. The anti-cryostats, so-called warm bore and warm finger, that provide a warm environment to allow the magnetic field-measuring probe to run through the 4.2-K beam tube are described. The warm finger for SSC short-magnet cryogenic tests was manufactured and successfully used. Finally, the feed and end cans -- used to provide cryogens to the magnet being tested as well as cryogenic vacuum -- and the support of other instrumentation are described

  10. Hip Strength Testing of Soccer Players With Long-Standing Hip and Groin Pain

    Rafn, Bolette S; Tang, Lars; Nielsen, Peter Martin;

    2016-01-01

    OBJECTIVE: To investigate whether self-reported pain during hip strength testing correlates to a large degree with hip muscle strength in soccer players with long-standing unilateral hip and groin pain. DESIGN: Cross-sectional study. SETTING: Clinical assessments at Sports Orthopaedic Research...... Center-Copenhagen (SORC-C), Arthroscopic Centre Amager, Copenhagen University Hospital, Denmark. PARTICIPANTS: Twenty-four male soccer players with unilateral long-standing hip and groin pain. INTERVENTIONS: The soccer players performed 5 reliable hip muscle strength tests (isometric hip flexion...... strength (Spearman rho = -0.44, P = 0.016). CONCLUSIONS: Self-reported pain during testing does not seem to correlate with the majority of hip muscle strength tests used in soccer players with long-standing hip and groin pain....

  11. An ion source test stand for the ISAC facility at TRIUMF

    The properties of ion sources and the beams extracted from them are critical to the successful design of the ISAC facility at TRIUMF. To better understand these properties, an off line 60 kV test stand has been constructed to test and evaluate targets and ion sources intended for use at the future ISAC facility. The test stand also presents the opportunity to evaluate diagnostics, beam monitoring and system control techniques required for ISAC. The test stand vacuum chamber mimics the ISAC target module. Ion beams are produced using a fixed geometry multielectrode extraction column and transported through 5m of beamline using electrostatic elements. Mass analysis is achieved using a 45 magnetic dipole midway along the flight path. Diagnostic elements positioned throughout the beamline are used to determine beam properties. (orig.)

  12. Development of timing system for RF ion source and RFQ III test stand

    J-PARC LINAC is scheduled for installation of cesium seeded RF-driven H- ion source (RF ion source) and 50 mA RFQ (RFQ III) for achieving high current beam in 2014. Therefore, we were implemented beam test at RF ion source and RFQ III test stand since 2013. The control system for RF ion source and RFQ III test stand was designed considering compatibility to the control system in J-PARC LINAC. But the timing parameter for RF ion source is different from the timing parameter for H- ion source is operating in J-PARC, because method of generating H- plasma is different. Therefore, we develop the timing system for RF ion source using the timing parameter of RF ion source, and were used it at RF ion source and RFQ III test stand. This report is described mainly the timing system. (author)

  13. Test stands for the Central Drift Chamber front end hybrid in the Stanford Linear Collider Detector

    Lo, C.C.; Yim, A.K.

    1987-10-01

    The Central Drift Chamber (CDC) of the SLAC Linear Collider Detector (SLD) uses 1280 front end electronic hybrid modules. Each of these modules contains over 450 components and performs numerous functions. This paper describes the four test stands for production and detailed circuit characterizations of these hybrids. Descriptions and performance of some of the important functions of the test systems will be presented here.

  14. 40 CFR 201.16 - Standard for locomotive load cell test stands.

    2010-07-01

    ... 40 Protection of Environment 24 2010-07-01 2010-07-01 false Standard for locomotive load cell test... Interstate Rail Carrier Operations Standards § 201.16 Standard for locomotive load cell test stands. (a) Effective January 15, 1984, no carrier subject to this reguation shall operate locomotive load cell...

  15. Novel automatic phase lock determination for superconducting cavity tests at vertical test stand at RRCAT

    RRCAT has developed a Vertical Test Stand (VTS) which is used to test the Nb superconducting cavities under cryogenic conditions. In the VTS, RF cavity is characterized for its quality factor variation vs the accelerating gradient. The RF system is an essential part of the VTS which is required to provide stable RF power to the cavity in terms of amplitude, frequency and phase. RF system of VTS consists of several modules including the LLRF system. The LLRF system consists of the 'Frequency Control Module' which controls the input frequency to the SCRF cavity. Due to high quality factor, bandwidth of the cavity is less than 1 Hz. Even slight mechanical vibrations (microphonics) causes change in cavity resonance frequency resulting in total reflection of incident power. A PLL based frequency tracking module has been used to track the resonant frequency of RF cavity. This module changes RF source frequency according to change in Cavity resonance frequency. A novel method using a LabView based computer program has been developed which changes the phase of input RF signal using IQ modulator and monitors the transmitted power, incident and reflected power. The program plots the graph between phase and ratio of transmitted power to incident/reflected power and gives optimum locking phase for operation which has resulted in significant saving in the overall process time for the tests of the cavities in VTS. (author)

  16. Programmable logic controller system in neutral beam injector's ion source test stand

    Due to the real-time monitoring requirement of field devices in EAST-NBI ion source test stand, this paper introduces a programmable logic controller (PLC) system based on Profibus protocol. The hardware configuration of PLC system can be determined according to the requirement of test stand, a Profibus-DP network with single-master workstation make a distributed I/O system. The PLC system can monitor the field devices' status in real time, exchange data with NBI control system and instruct field devices work stably. In addition, full graphical user interface can realize the visualization of system operation, data storage and display in real-time, which will provide a basis for experimental analysis for physical operator. The whole PLC system is reliable,reproducible, well compatible and scalable, which can be used to monitor and control the field devices in EAST-NBI test stand. (authors)

  17. Installation of TVC Actuators in a Two Axis Inertial Load Simulator Test Stand

    Dziubanek, Adam

    2013-01-01

    This paper is about the installation of Space Shuttle Main Engines (SSME) actuators in the new Two Axis Inertial Load Simulator (ILS) at MSFC. The new test stand will support the core stage of the Space Launch System (SLS). Because of the unique geometry of the new test stand standard actuator installation procedures will not work. I have been asked to develop a design on how to install the actuators into the new test stand. After speaking with the engineers and technicians I have created a possible design solution. Using Pro Engineer design software and running my own stress calculations I have proven my design is feasible. I have learned how to calculate the stresses my design will see from this task. From the calculations I have learned I have over built the apparatus. I have also expanded my knowledge of Pro Engineer and was able to create a model of my idea.

  18. Standing the Test of Time: Barth and Ethnicity

    Eloise Hummell

    2014-01-01

    Full Text Available Ethnicity remains an essential theory for understanding societies in the 21 st century. This paper focuses on how well Fredrik Barth’s 1969 analyses and insights in Ethnic Groups and Boundaries have ‘stood the test of time’. Barth’s theoretical framework sets out the subtle and sinuous frontiers of ethnic boundaries, the interconnectedness of ethnic identities and the continuity of ethnic groups. The messianic nature of this work will be explore d by closely reviewing some of his less well cited assertions, including those regarding stigmatized identities, increasing structural similarities and the political organisation of ethnic groups. Considering the applicability of his theory in current time s necessitates reflecting on what Barth may have omitted, oversimplified or exaggerated, such as the potential for multiple ethnic identities; the importance of the content of cultural practices, symbols and ‘traditions’; conflict and power plays within na tion - states. ‘Looking back’ at Barth’s work on ethnicity assists in enhancing understandings of current social spheres and reconsidering the world around us. It also contributes to the early stages of the author’s current PhD research which includes a focu s on Catalan ethnic identity.

  19. A model of heat transfer taking place in thermographic test stand

    Kaczmarczyk, J.; M. Rojek; G. Wróbel; J. Stabik

    2008-01-01

    Purpose: The aim of this paper is to present a model describing heat transfer taking place during thermovision testing of polymer composites. Thermographic tests were undertaken to identify thermal properties of searched material and to correlate them with operational characteristics.Design/methodology/approach: Heat transfer model of thermographic testing stand of our own design was elaborated. The model was applied as a tool of tested material characteristics identification, forming the bas...

  20. An overview of the new test stand for H{sup −} ion sources at FNAL

    Sosa, A., E-mail: asosa@fnal.gov; Bollinger, D. S.; Duel, K.; Karns, P. R.; Pellico, W.; Tan, C. Y. [Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510-5011 (United States)

    2016-02-15

    A new test stand at Fermi National Accelerator Laboratory (FNAL) is being constructed to carry out experiments to develop and upgrade the present magnetron-type sources of H{sup −} ions of up to 80 mA at 35 keV in the context of the Proton Improvement Plan. The aim of this plan is to provide high-power proton beams for the experiments at FNAL. The technical details of the construction and layout of this test stand are presented, along with a prospective set of diagnostics to monitor the sources.

  1. An Overview of the New Test Stand for H- Ion Sources at FNAL

    Sosa, A; Duel, K; Karns, P; Pellico, W; Tan, C Y

    2015-01-01

    A new test stand at FNAL is being constructed to carry out experiments to develop and upgrade the present magnetron-type sources of H- ions of up to 80 mA at 35 keV in the context of the Proton Improvement Plan (PIP). The aim of this plan is to provide high-power proton beams for the experiments at FNAL. The technical details of the construction and layout of this test stand are presented, along with a prospective set of diagnostics to monitor the sources.

  2. An overview of the new test stand for H⁻ ion sources at FNAL.

    Sosa, A; Bollinger, D S; Duel, K; Karns, P R; Pellico, W; Tan, C Y

    2016-02-01

    A new test stand at Fermi National Accelerator Laboratory (FNAL) is being constructed to carry out experiments to develop and upgrade the present magnetron-type sources of H(-) ions of up to 80 mA at 35 keV in the context of the Proton Improvement Plan. The aim of this plan is to provide high-power proton beams for the experiments at FNAL. The technical details of the construction and layout of this test stand are presented, along with a prospective set of diagnostics to monitor the sources. PMID:26931987

  3. An overview of the new test stand for H− ion sources at FNAL

    A new test stand at Fermi National Accelerator Laboratory (FNAL) is being constructed to carry out experiments to develop and upgrade the present magnetron-type sources of H− ions of up to 80 mA at 35 keV in the context of the Proton Improvement Plan. The aim of this plan is to provide high-power proton beams for the experiments at FNAL. The technical details of the construction and layout of this test stand are presented, along with a prospective set of diagnostics to monitor the sources

  4. An overview of the new test stand for H- ion sources at FNAL

    Sosa, A.; Bollinger, D. S.; Duel, K.; Karns, P. R.; Pellico, W.; Tan, C. Y.

    2016-02-01

    A new test stand at Fermi National Accelerator Laboratory (FNAL) is being constructed to carry out experiments to develop and upgrade the present magnetron-type sources of H- ions of up to 80 mA at 35 keV in the context of the Proton Improvement Plan. The aim of this plan is to provide high-power proton beams for the experiments at FNAL. The technical details of the construction and layout of this test stand are presented, along with a prospective set of diagnostics to monitor the sources.

  5. Fabrication test of an engineering model cryo-sorption pump of KAERI test stand for KSTAR NBI

    The neutral beam injection system for KSTAR tokamak requires a pumping speed of > 2 x 103 m3/s to evacuate hydrogen/deuterium gases in the beam line chamber. In order to develop the KSTAR NBI system in KAERI test stand, that does not have a liquid He plant for the cryo-condensation pump, the cryo-sorption pump is being developed. An engineering model cryo-sorption pump, that will be a module of the pump for KAERI test stand, are designed, fabricated, and tested. The basic concept of the design is to obtain a maximum pumping speed with one refrigerator and minimum depth. The measured pumping speed of the engineering model is 80 m3/s for hydrogen at the panel temperature of 12 K. This pump will be used for the KAERI NBI Test Stand. (author)

  6. High power X-band RF test stand development and high power testing of the CLIC crab cavity

    Woolley, Benjamin

    2015-01-01

    This thesis describes the development and operation of multiple high power X-band RF test facilities for high gradient acceleration and deflecting structures at CERN, as re-quired for the e+ e- collider research programme CLIC (Compact Linear Collider). Signif-icant improvements to the control system and operation of the first test stand, Xbox-1 are implemented. The development of the second X-band test stand at CERN, Xbox-2 is followed from inception to completion. The LLRF (Low Level Radio ...

  7. Integrated System Health Management: Pilot Operational Implementation in a Rocket Engine Test Stand

    Figueroa, Fernando; Schmalzel, John L.; Morris, Jonathan A.; Turowski, Mark P.; Franzl, Richard

    2010-01-01

    This paper describes a credible implementation of integrated system health management (ISHM) capability, as a pilot operational system. Important core elements that make possible fielding and evolution of ISHM capability have been validated in a rocket engine test stand, encompassing all phases of operation: stand-by, pre-test, test, and post-test. The core elements include an architecture (hardware/software) for ISHM, gateways for streaming real-time data from the data acquisition system into the ISHM system, automated configuration management employing transducer electronic data sheets (TEDS?s) adhering to the IEEE 1451.4 Standard for Smart Sensors and Actuators, broadcasting and capture of sensor measurements and health information adhering to the IEEE 1451.1 Standard for Smart Sensors and Actuators, user interfaces for management of redlines/bluelines, and establishment of a health assessment database system (HADS) and browser for extensive post-test analysis. The ISHM system was installed in the Test Control Room, where test operators were exposed to the capability. All functionalities of the pilot implementation were validated during testing and in post-test data streaming through the ISHM system. The implementation enabled significant improvements in awareness about the status of the test stand, and events and their causes/consequences. The architecture and software elements embody a systems engineering, knowledge-based approach; in conjunction with object-oriented environments. These qualities are permitting systematic augmentation of the capability and scaling to encompass other subsystems.

  8. Stanowisko testowe z miedzianą strukturą typu TESLA (Test stand with copper TESLA structure)

    Glowka, J

    2009-01-01

    The paper presents preparation of a copper TESLA structure for the use in laboratory test stand. Standing wave principle of operation of the structure and basic characteristics are described. Sturucture tuning procedure is discussed and tuning results are presented. Construction of laboratory test stand is shortly dscribed. Sample results obtained from test stand control system are presented and discussed. Structures are tested for FEL applications. The paper has a wide didactic nature for students interested in accelerator technology. The tests were done in a laboratory associated with the EU FP CARE and EuCARD Projects.

  9. Then & Now: Reflections on "Bioengineering evaluation and field test of the Stand-Alone Therapeutic Aid"

    Ronald J. Triolo, PhD

    2013-01-01

    Our thinking and approachto research and assistivetechnologies have evolvedsignificantly since the publication 50years ago of “Bioengineering evaluationand field test of the Stand-AloneTherapeutic Aid.” The most strikingchange is in the value placed on basicdiscovery and knowledge generation,in addition to device developmentand verification testing. This evolutionfrom a “Consumer Reports” mentality,where assistive technologies arefield tested, to prospective, controlledtrials of fundamental c...

  10. Arch height change during sit-to-stand: an alternative for the navicular drop test

    Fosberg Kelly K; Vicenzino Bill; Medoff Lynn; Cornwall Mark W; McPoil Thomas G; Hilz Dana

    2009-01-01

    Abstract Correction to McPoil TG, Cornwall MW, Medoff L, Vicenzion B, Fosberg K, Hilz D. Arch height change during sit-to-stand: an alternative for the navicular drop test. Journal of Foot and Ankle Research 2008; 1:3.

  11. Arch height change during sit-to-stand: an alternative for the navicular drop test

    Fosberg Kelly K

    2009-05-01

    Full Text Available Abstract Correction to McPoil TG, Cornwall MW, Medoff L, Vicenzion B, Fosberg K, Hilz D. Arch height change during sit-to-stand: an alternative for the navicular drop test. Journal of Foot and Ankle Research 2008; 1:3.

  12. Present status of 972 MHz RF test-stand at JAERI

    The JAERI 972 MHz RF Test-Stand has been operated for the development and estimation of 972 MHz RF Components at J-PARC (Japan Proton Accelerator Research Complex) Linac in July 2001. In this paper, we describe the operational results in last year and report the R and D status of Klystron RF characteristics for a 972 MHz first tube. (author)

  13. Poisson simulation for high voltage terminal of test stand for 1MV electrostatic accelerator

    KOMAC provide ion beam to user which energy range need to expand to MeV range and develop 1 MV electrostatic accelerator. The specifications of the electrostatic accelerator are 1MV acceleration voltage, 10 mA peak current and variable gas ion. We are developing test stand before set up 1 MV electrostatic accelerator. The test stand voltage is 300 kV and operating time is 8 hours. The test stand is consist of 300 kV high voltage terminal, DC-AC-DC inverter, power supply device inside terminal, 200MHz RF power, 5 kV extraction power supply, 300 kV accelerating tube and vacuum system.. The beam measurement system and beam dump will be installed next to accelerating tube. Poisson code simulation results of the high voltage terminal are presented in this paper. Poisson code has been used to calculate the electric field for high voltage terminal. The results of simulation were verified with reasonable results. The poisson code structure could be apply to the high voltage terminal of the test stand

  14. Test stand for the silicon vertex detector of the Collider Detector Facility

    A test stand for the next generation of the Silicon Vertex Detector (SVX-II) of the Collider Detector Facility (CDF) at Fermilab has been developed. It is capable of performing cosmic ray, beam, and laser pulsing tests on silicon strip detectors using the new generation of SVX chips. The test stand is composed of a SGI workstation, a VME CPU, the Silicon Test Acquisition and Readout (STAR) board, the Test Fiber Interface Board (TFIB), and the Test Port Card (TPC). The STAR mediates between external stimuli for the different tests and produces appropriate high level commands which are sent to the TFIB. The TFIB, in conjunction with the TPC, translates these commands into the correct logic levels to control the SVX chips. The four modes of operation of the SVX chips are configuration, data acquisition, digitization, and data readout. The data read out from the SVX chips is transferred to the STAR. The STAR can then be accessed by the VME CPU and the SGI workstation for future analysis. The detailed description of this test stand is given

  15. Z-2 Suit Support Stand and MKIII Suit Center of Gravity Test

    Nguyen, Tuan Q.

    2014-01-01

    NASA's next generation spacesuits are the Z-Series suits, made for a range of possible exploration missions in the near future. The prototype Z-1 suit has been developed and assembled to incorporate new technologies that has never been utilized before in the Apollo suits and the Extravehicular Mobility Unit (EMU). NASA engineers tested the Z-1 suit extensively in order to developed design requirements for the new Z-2 suit. At the end of 2014, NASA will be receiving the new Z-2 suit to perform more testing and to further develop the new technologies of the suit. In order to do so, a suit support stand will be designed and fabricated to support the Z-2 suit during maintenance, sizing, and structural leakage testing. The Z-2 Suit Support Stand (Z2SSS) will be utilized for these purposes in the early testing stages of the Z-2 suit.

  16. Hydrostatic Vibratory Drive of the Test Stand for Excitation of the Amplitude-Modulated Vibrations

    Nizhegorodov, A. I.; Gavrilin, A. N.; Moyzes, B. B.

    2016-01-01

    The article reviews the problems arising during the development of the test stand hydrostatic vibratory drive, which synthesize controlled amplitude-modulated vibrations required testing of vibration strength and vibrostability of technological devices. The newly developed modification can adequately simulate the transport vibration and vibration of the operating power-supply units of technological machinery vibration by means of implementing of a continuous frequency spectrum of the vibration exposure in the desired frequency range.

  17. Robust multivariable predictive control: how can it be applied to industrial test stands ?

    Bordeneuve-Guibé, Joël; Vaucoret, Cyril

    2001-01-01

    To cope with recent technological evolutions of air conditioning systems for aircraft, the French Aeronautical Test Center built a new test stand for certification at ground level. The constraints specified by the industrial users of the process seemed antagonistic for many reasons. First, the controller had to be implemented on an industrial automaton, not adaptable to modern algorithms. Then the specified dynamic performances were very demanding, especially taking into account the wide o...

  18. NASA's Functional Task Test: High Intensity Exercise Improves the Heart Rate Response to a Stand Test Following 70 Days of Bedrest

    Laurie, Steven S.; Lee, Stuart M. C.; Phillips, Tiffany R.; Dillon, E. Lichar; Sheffield-Moore, Melinda; Urban, Randall J.; Ploutz-Snyder, Lori; Stenger, Michael B.; Bloomberg, Jacob J.

    2015-01-01

    Cardiovascular adaptations due to spaceflight are modeled with 6deg head-down tilt bed rest (BR) and result in decreased orthostatic tolerance. We investigated if high-intensity resistive and aerobic exercise with and without testosterone supplementation would improve the heart rate (HR) response to a 3.5-min stand test and how quickly these changes recovered following BR. During 70 days of BR male subjects performed no exercise (Control, n=10), high intensity supine resistive and aerobic exercise (Exercise, n=9), or supine exercise plus supplemental testosterone (Exercise+T, n=8; 100 mg i.m., weekly in 2-week on/off cycles). We measured HR for 2 min while subjects were prone and for 3 min after standing twice before and 0, 1, 6, and 11 days after BR. Mixed-effects linear regression models were used to evaluate group, time, and interaction effects. Compared to pre-bed rest, prone HR was elevated on BR+0 and BR+1 in Control, but not Exercise or Exercise+T groups, and standing HR was greater in all 3 groups. The increase in prone and standing HR in Control subjects was greater than either Exercise or Exercise+T groups and all groups recovered by BR+6. The change in HR from prone to standing more than doubled on BR+0 in all groups, but was significantly less in the Exericse+T group compared to the Control, but not Exercise group. Exercise reduces, but does not prevent the increase in HR observed in response to standing. The significantly lower HR response in the Exercise+T group requires further investigation to determine physiologic significance.

  19. 1 MW, 352.2 MHz, CW and Pulsed RF test stand

    A 1 MW, 352.2 MHz, RF test stand based on Thales make TH 2089 klystron amplifier is being developed at Raja Ramanna Centre for Advanced Technology (RRCAT), Indore for characterization and qualification of RF components, cavities and related subsystems. Provision to vary RF power from 50 kW to 1 MW with adequate flexibility for testing wide range of HV components, RF components and cavities is incorporated in this test stand. The paper presents a brief detail of various power supplies like high voltage cathode bias power supply, modulating anode power supply, filament power supply, electromagnet power supplies and ion pump power supplies along with their interconnections for biasing TH 2089 klystron amplifier. A digital control and interlock system is being developed to realize proper sequence of operation of various power supplies and to monitor the status of crucial parameters in this test set up. This RF test stand will be a unique national facility, capable of providing both CW and pulse RF power for realizing reliable RF power sources for various projects including the development of high energy proton linac under ADSS program of the Department of Atomic Energy. (author)

  20. 40 CFR 201.27 - Procedures for: (1) Determining applicability of the locomotive load cell test stand standard and...

    2010-07-01

    ... 40 Protection of Environment 24 2010-07-01 2010-07-01 false Procedures for: (1) Determining applicability of the locomotive load cell test stand standard and switcher locomotive standard by noise measurement on a receiving property; (2) measurement of locomotive load cell test stands more than 120 meters (400 feet) on a receiving property....

  1. 49 CFR 210.33 - Operation standards (switcher locomotives, load cell test stands, car coupling operations, and...

    2010-10-01

    ... (switcher locomotives, load cell test stands, car coupling operations, and retarders). (a) Measurement on receiving property of the noise emission levels from switcher locomotives, load cell test stands, car coupling operations, and retarders shall be performed in accordance with the requirements of 40 CFR...

  2. Development of piston rod sealings. Friction and leakage test stands; Entwicklung von Kolbenstangendichtungen. Reibkraft- und Leckagepruefstaende

    Goerres, M. [RWTH Aachen (DE). Inst. fuer Fluidtechnische Antriebe und Steuerungen (IFAS)

    2003-07-01

    New test stands for piston rod sealings for biodegradable fluids were developed by the IFAS institute of RWTH Aachen University. Influencing parameters are the leakage rate, the pressure distribution between sealing and piston rod, and the (direction-dependent) friction. The contribution describes the conception and development of the friction test stand for measuring the pressure profile and directional friction force of a single sealing. Droplet leakage is tested in a separate long-term test stand whose conception is explained in the contribution. [German] Zur Entwicklung neuartiger Kolbenstangendichtungen fuer biologisch schnell abbaubare Fluide, werden am Institut fuer fluidtechnische Antriebe und Steuerungen (IFAS) der RWTH Aachen neue Pruefstaende entwickelt. Wesentlichen Einfluss auf das Abdichtverhalten der Dichtungen haben neben der Leckage vor allem die Pressungsverteilung zwischen Dichtung und Kolbenstange, sowie die (verfahrrichtungsabhaengige) Reibung. Der Beitrag beschreibt die Konzeption und Entwicklung des Reibungspruefstands zur Messung des Druckprofils und der richtungsabhaengigen Reibkraft einer einzelnen Dichtung. Die Abtropfleckage wird mit Hilfe eines eigenstaendigen Dauerversuchspruefstands ermittelt, dessen Konzeption im Artikel erlaeutert wird.

  3. Test re-test reliability of centre of pressure measures during standing balance in individuals with knee osteoarthritis.

    Takacs, Judit; Carpenter, Mark G; Garland, S Jayne; Hunt, Michael A

    2014-01-01

    Assessment of changes in standing balance following an intervention requires accurate measurement of balance parameters. The reliability of centre of pressure measures of balance during single-leg standing has not been reported in individuals with knee osteoarthritis. The purpose of this study was to assess the test re-test reliability of force platform centre of pressure measures during single-leg standing in older adults with knee osteoarthritis. Twenty-five adults with radiographic evidence of knee osteoarthritis performed single-leg standing balance trials on a laboratory-grade force platform on two occasions, no more than 14 days apart. Participants were asked to stand on their more symptomatic limb for three, ten second trials. Centre of pressure measures collected included: standard deviation in the mediolateral and anteroposterior directions, mean path length, velocity, and area. The mean of the three trials was calculated. Intraclass correlation coefficients, standard error of measurement, Bland and Altman plots and the minimum detectable change were calculated. Intraclass correlation coefficients ranged from 0.54 to 0.87, suggesting mixed reliability of measures. Reliability was lowest for the centre of pressure area (intraclass correlation coefficient=0.54), and highest for centre of pressure velocity and path length (intraclass correlation coefficient=0.87 for both). Standard error of measurement values were low for standard deviation in the mediolateral direction and high for centre of pressure area. These results suggest that centre of pressure values, in particular path length and velocity, are appropriate for assessment of standing balance in people with medial knee osteoarthritis. PMID:24746407

  4. Processing Test Stand for the Fundamental Power Couplers of the Spallation Neutron Source (SNS) Superconducting Cavities

    A test stand has been designed, constructed and commissioned for the processing of the SNS superconducting cavity fundamental power couplers. The cart is designed for insertion into a high-power (1 MW and higher) RF system at 805 MHz and it includes a complete vacuum pumping system, a bakeout control system and, in separate racks, all the controls for the RF conditioning, including interlocks, diagnostics and data acquisition systems

  5. COMPUTERIZED TEST STAND FOR INVESTIGATION OF STRAIN WAVES IN COMPOSITE CONSTRUCTIONS

    Morozov, Yu; Snisarenko, S.

    2010-01-01

    The paper presents a test stand for investigation of ramp loading of composite constructions such as beams and plates. This ramp loading was performed using a striker with a piezoelectric force transducer. The velocity of the striker is up to 40 mps. The registration of the measurements results is carried out using a computerized measurement system. The experimental results of contact shock force acquisition are stated with appropriate calculations of nonstationary bending and shearing strain...

  6. Modeling Design and Application of Low-Temperature Plasma Treatment Test Stand for Seeds before Sowing

    Shao, Changyong; You, Yong; Wang, Guanghui; Wang, Zhiqin; LI Yan; Zhao, Lijing; Tang, Xin; Liu, Liangdong; Wang, Decheng

    2014-01-01

    Stimulation with a low-temperature plasma (LTP) can improve the seed germination and seed adaptability to the environment. This technology has been applied in practice, but the study level of mechanism involved is still limited. Moreover, the treatment devices in using are quite simple. The paper focuses on the modeling design and application of the LTP treatment test stand for seeds before sowing. Numerous experimental LTP treatment on crop seeds and forage grass seeds will be conducted to f...

  7. Performance Studies of the Vibration Wire Monitor on the Test Stand with Low Energy Electron Beam

    Okabe, Kota; Yoshimoto, Masahiro; Kinsho, Michikazu

    In the high intensity proton accelerator as the Japan Proton Accelerator Research Complex (J-PARC) accelerators, serious radiation and residual dose is induced by a small beam loss such a beam halo. Therefore, diagnostics of the beam halo formation is one of the most important issues to control the beam loss. For the beam halo monitor, the vibration wire monitor (VWM) has a potential for investigating the beam halo and weak beam scanning. The VWM has a wide dynamic range, high resolution and the VWM is not susceptible to secondary electrons and electric noises. We have studied the VWM features as a new beam-halo monitor on the test stand with low energy electron gun. The frequency shift of the irradiated vibration wire was confirmed about wire material and the electron beam profile measured by using the VWM was consistent with the results of the Faraday cup measurement. Also we calculated a temperature distribution on the vibration wire which is irradiated by the electron beam with the numerical simulation. The simulations have been fairly successful in reproducing the transient of the irradiated vibration wire frequency measured by test stand experiments. In this paper, we will report a result of performance evaluation for the VWM on the test stands and discuss the VWM for beam halo diagnostic

  8. Large-scale generic test stand for testing of multiple configurations of air filters utilizing a range of particle size distributions.

    Giffin, Paxton K; Parsons, Michael S; Unz, Ronald J; Waggoner, Charles A

    2012-05-01

    The Institute for Clean Energy Technology (ICET) at Mississippi State University has developed a test stand capable of lifecycle testing of high efficiency particulate air filters and other filters specified in American Society of Mechanical Engineers Code on Nuclear Air and Gas Treatment (AG-1) filters. The test stand is currently equipped to test AG-1 Section FK radial flow filters, and expansion is currently underway to increase testing capabilities for other types of AG-1 filters. The test stand is capable of producing differential pressures of 12.45 kPa (50 in. w.c.) at volumetric air flow rates up to 113.3 m(3)/min (4000 CFM). Testing is performed at elevated and ambient conditions for temperature and relative humidity. Current testing utilizes three challenge aerosols: carbon black, alumina, and Arizona road dust (A1-Ultrafine). Each aerosol has a different mass median diameter to test loading over a wide range of particles sizes. The test stand is designed to monitor and maintain relative humidity and temperature to required specifications. Instrumentation is implemented on the upstream and downstream sections of the test stand as well as on the filter housing itself. Representative data are presented herein illustrating the test stand's capabilities. Digital images of the filter pack collected during and after testing is displayed after the representative data are discussed. In conclusion, the ICET test stand with AG-1 filter testing capabilities has been developed and hurdles such as test parameter stability and design flexibility overcome. PMID:22667655

  9. Cold test results of a side-coupled standing-wave electron-accelerating structure

    Song, Ki Baek; Li, Yonggui; Lee, Sanghyun; Lee, Byeong-No; Park, Hyung Dal; Cha, Sung-Su; Lee, Byung Cheol

    2013-07-01

    The radio-frequency (RF) cavity for the dual-energy S-band electron linear accelerator (LINAC) is designed for a cargo inspection system (CIS) at the Korea Atomic Energy Research Institute (KAERI). The cold test results of the electron accelerator structure, which has a side-coupled standing-wave interlaced-pulse dual-energy mode, are described. The design concept, basic structure, microwave-tuning method, and cold-test procedure are described as well. The measured dispersion curve, spectrum characteristics, ρ-f relation of the power coupler, and axial field distribution of the accelerating gradient are provided.

  10. Arch height change during sit-to-stand: an alternative for the navicular drop test

    McPoil Thomas G

    2008-07-01

    Full Text Available Abstract Background A study was conducted to determine the reliability and validity of a new foot mobility assessment method that utilizes digital images to measure the change in dorsal arch height measured at 50% of the length of the foot during the Sit-to-Stand test. Methods Two hundred – seventy five healthy participants participated in the study. The medial aspect of each foot was photographed with a digital camera while each participant stood with 50% body weight on each foot as well as in sitting for a non-weight bearing image. The dorsal arch height was measured at 50% of the total length of the foot on both weight bearing and non-weight bearing images to determine the change in dorsal arch height. The reliability and validity of the measurements were then determined. Results The mean difference in dorsal arch height between non-weight bearing and weight bearing was 10 millimeters. The change in arch height during the Sit-to-Stand test was shown to have good to high levels of intra- and inter-reliability as well as validity using x-rays as the criterion measure. Conclusion While the navicular drop test has been widely used as a clinical method to assess foot mobility, poor levels of inter-rater reliability have been reported. The results of the current study suggest that the change in dorsal arch height during the Sit-to-Stand test offers the clinician a reliable and valid alternative to the navicular drop test.

  11. Characterization of Space Shuttle Reusable Rocket Motor Static Test Stand Thrust Measurements

    Cook, Mart L.; Gruet, Laurent; Cash, Stephen F. (Technical Monitor)

    2003-01-01

    Space Shuttle Reusable Solid Rocket Motors (RSRM) are static tested at two ATK Thiokol Propulsion facilities in Utah, T-24 and T-97. The newer T-97 static test facility was recently upgraded to allow thrust measurement capability. All previous static test motor thrust measurements have been taken at T-24; data from these tests were used to characterize thrust parameters and requirement limits for flight motors. Validation of the new T-97 thrust measurement system is required prior to use for official RSRM performance assessments. Since thrust cannot be measured on RSRM flight motors, flight motor measured chamber pressure and a nominal thrust-to-pressure relationship (based on static test motor thrust and pressure measurements) are used to reconstruct flight motor performance. Historical static test and flight motor performance data are used in conjunction with production subscale test data to predict RSRM performance. The predicted motor performance is provided to support Space Shuttle trajectory and system loads analyses. Therefore, an accurate nominal thrust-to-pressure (F/P) relationship is critical for accurate RSRM flight motor performance and Space Shuttle analyses. Flight Support Motors (FSM) 7, 8, and 9 provided thrust data for the validation of the T-97 thrust measurement system. The T-97 thrust data were analyzed and compared to thrust previously measured at T-24 to verify measured thrust data and identify any test-stand bias. The T-97 FIP data were consistent and within the T-24 static test statistical family expectation. The FSMs 7-9 thrust data met all NASA contract requirements, and the test stand is now verified for future thrust measurements.

  12. A Positional X-ray Instrumentation Test Stand For Beam-Line Experiments

    Nikoleyczik, Jonathan; Prieskorn, Z.; Burrows, D. N.; Falcone, A.

    2014-01-01

    A multi-axis, motion controlled test stand has been built in the PSU 47 m X-ray beam-line for the purpose of testing X-ray instrumentation and mirrors using parallel rays. The test stand is capable of translation along two axes and rotation about two axes with motorized fine position control. The translation stages have a range of motion of 200 mm with a movement accuracy of ± 2.5 microns. Rotation is accomplished with a two-axis gimbal which can rotate 360° about one axis and 240° about another; movement with ± 35 arcsecond accuracy are achieved in both axes. The position and status are monitored using a LabView program. An XCalibr source with multiple target materials is used as an X-ray source and can produce multiple lines between 0.8 and 8 keV. Some sample spectra are shown from a Si-PIN diode detector. This system is well suited for testing X-ray mirror segments which are currently being developed.

  13. Analysis of Flame Deflector Spray Nozzles in Rocket Engine Test Stands

    Sachdev, Jai S.; Ahuja, Vineet; Hosangadi, Ashvin; Allgood, Daniel C.

    2010-01-01

    The development of a unified tightly coupled multi-phase computational framework is described for the analysis and design of cooling spray nozzle configurations on the flame deflector in rocket engine test stands. An Eulerian formulation is used to model the disperse phase and is coupled to the gas-phase equations through momentum and heat transfer as well as phase change. The phase change formulation is modeled according to a modified form of the Hertz-Knudsen equation. Various simple test cases are presented to verify the validity of the numerical framework. The ability of the methodology to accurately predict the temperature load on the flame deflector is demonstrated though application to an actual sub-scale test facility. The CFD simulation was able to reproduce the result of the test-firing, showing that the spray nozzle configuration provided insufficient amount of cooling.

  14. Beam Profile Measurement of 300 kV Ion Source Test Stand for 1 MV Electrostatic Accelerator

    Park, Sae-Hoon; Kim, Yu-Seok [Dongguk University, Gyeonju (Korea, Republic of); Kim, Dae-Il; Kwon, Hyeok-Jung; Cho, Yong-Sub [Korea Multipurpose Accelerator Complex, Gyeongju (Korea, Republic of)

    2015-10-15

    In this paper, RF ion source, test stand of the ion source and its test results are presented. Beam profile was measured at the downstream from the accelerating tube and at the beam dump by using BPM and wire scanner. The RF ion source of the test stand is verified by measuring the total beam current with a faraday cup in the chamber. The KOMAC (KOrea Multi-purpose Accelerator Complex) has been developing a 300 kV ion source test stand for a 1 MV electrostatic accelerator. An ion source and accelerating tube will be installed in a high pressure vessel. The ion source in a high pressure vessel requires high reliability. To confirm the stable operation of the ion source, a test stand was proposed and developed. The ion source will be tested at the test stand to verify its long-term operation conditions. The test stand consists of a 300 kV high voltage terminal, a battery for the ion source power, a 60 Hz inverter, a 200 MHz RF power, a 5 kV extraction power supply, a 300 kV accelerating tube, and a vacuum system. The beam profile monitor was installed at the downstream from the accelerating tube. Wire scanner and faraday-cup was installed at the end of the chamber.

  15. Arch height change during sit-to-stand: an alternative for the navicular drop test

    McPoil Thomas G; Cornwall Mark W; Medoff Lynn; Vicenzino Bill; Forsberg Kelly; Hilz Dana

    2008-01-01

    Abstract Background A study was conducted to determine the reliability and validity of a new foot mobility assessment method that utilizes digital images to measure the change in dorsal arch height measured at 50% of the length of the foot during the Sit-to-Stand test. Methods Two hundred – seventy five healthy participants participated in the study. The medial aspect of each foot was photographed with a digital camera while each participant stood with 50% body weight on each foot as well as ...

  16. Incompetency to stand trial and mental health treatment: a case study testing the subversion hypothesis.

    Hochstedler Steury, E; Choinski, M; Steury, S R

    1996-01-01

    This study is a test of the so-called subversion hypothesis, which posits that mentally disordered persons who commit minor offenses are prosecuted primarily for the purpose of imposing mental health treatment on them through evaluation and treatment for incompetency to stand trial. These persons, according to the subversion hypothesis, find themselves in the criminal process because they do not meet the stringent civil commitment standards, but do meet the less stringent criteria for a disorderly conduct prosecution. The findings, based on 893 disorderly conduct prosecutions in a single jurisdiction over a two-year period, do not lend general support to the subversion hypothesis. PMID:8889132

  17. Computer based diagnostic and control system for a 120 keV neutral beam test stand

    The computer based system provides data acquisition, analysis, display, archival, and control functions for the 120 KEV test stand IIIa at Lawrence Berkeley Laboratory. The system supports calorimeter arrays and spectrometer diagnostics, controls all power supplies and provides 7 modes of control ranging from manual control with computer monitor to full auto conditioning with an auto sweep capability for parameter variation studies. This paper describes the software structure, I/O techniques, control algorithms, hardware configuration, and system performance. Conclusions based on system performance provide useful insight for design of neutral beam control systems for use on large plasma devices

  18. Development of Temperature Measurements and Calorimetry for the Neutral Beam Test Stand Operation at KAERI

    Operation of the Neutral Beam Test Stand(NB-TS) at Korea Atomic Energy Research Institute(KAERI) now reaches to 80 kV-20A for about 10 seconds. Experiments with this kind of enormous power and energy necessarily entail many temperature measurements at various locations of the system, and most of the beam line components require to be monitored of their temperatures. We have been implementing temperature measurement utilizing K-Type and T-Type thermocouples(TCs) and a Pt-100 resistance temperature detector for the instrumentation and control and for establishing calorimetry during the operation of the NB-TS facility

  19. Fluorescent screens and image processing for the APS linac test stand

    A fluorescent screen was used to monitor relative beam position and spot size of a 56-MeV electron beam in the linac test stand. A chromium doped alumina ceramic screen inserted into the beam was monitored by a video camera. The resulting image was captured using a frame grabber and stored into memory. Reconstruction and analysis of the stored image was performed using PV-WAVE. This paper will discuss the hardware and software implementation of the fluorescent screen and imaging system. Proposed improvements for the APS linac fluorescent screens and image processing will also be discussed

  20. Fluorescent screens and image processing for the APS linac test stand

    A fluorescent screen was used to monitor relative beam position and spot size of a 56-MeV electron beam in the linac test stand. A chromium doped alumina ceramic screen inserted into the beam was monitored by a video camera. The resulting image was captured using a frame grabber and stored into memory. Reconstruction and analysis of the stored image was performed using PV-WAVE. This paper will discuss the hardware and software implementation of the fluorescent screen and imaging system. Proposed improvements for the APS linac fluorescent screens and image

  1. Determining the acceptance of the Brookhaven EBIS Test Stand for primary ions by computer simulation

    We report on computer studies to determine the acceptance of the Electron Beam Ion Source Test Stand (EBTS) at BNL. Knowledge of the acceptance is a useful guide in selecting a source of primary ions, and in designing a transfer line which best matches the primary ion beam to the acceptance of the EBTS. In this work, an ion beam with suitable parameters is tracked out of the EBIS, to a plane where knowledge of the acceptance is wanted. The emittance of the extracted beam in this plane gives a starting point for determining a more reliable value of acceptance. The result will be compared with a theoretical estimate

  2. Instrumentation and control system for the AT-2 accelerator test stand

    A data-driven subroutine package, written for our accelerator test stand (ATS), is described. This flexible package permits the rapid writing and modifying of data acquisition, control, and analysis programs for the many diverse experiments performed on the ATS. These structurally simple and easy to maintain routines help to control administratively the integrity of the ATS through the use of the database. Our operating experience indicates that the original design goals have been met. We describe the subroutines, database, and our experiences with this system

  3. A 20-Liter Test Stand with Gas Purification for Liquid Argon Research

    Li, Yichen; Tang, Wei; Joshi, Jyoti; Qian, Xin; Diwan, Milind; Kettell, Steve; Morse, William; Rao, Triveni; Stewart, James; Tsang, Thomas; Zhang, Lige

    2016-01-01

    We describe the design of a 20-liter test stand constructed to study fundamental properties of liquid argon (LAr). This system utilizes a simple, cost-effective gas argon (GAr) purification to achieve ultra-high purity, which is necessary to study electron transport properties in LAr. An electron drift stack with up to 25 cm length is constructed to study electron drift, diffusion, and attachment at various electric fields. A gold photocathode and a pulsed laser are used as a bright electron source. The operational performance of this system is reported.

  4. Design of the NSLS-II Linac Front End Test Stand

    The NSLS-II operational parameters place very stringent requirements on the injection system. Among these are the charge per bunch train at low emittance that is required from the linac along with the uniformity of the charge per bunch along the train. The NSLS-II linac is a 200 MeV linac produced by Research Instruments Gmbh. Part of the strategy for understanding to operation of the injectors is to test the front end of the linac prior to its installation in the facility. The linac front end consists of a 100 kV electron gun, 500 MHz subharmonic prebuncher, focusing solenoids and a suite of diagnostics. The diagnostics in the front end need to be supplemented with an additional suite of diagnostics to fully characterize the beam. In this paper we discuss the design of a test stand to measure the various properties of the beam generated from this section. In particular, the test stand will measure the charge, transverse emittance, energy, energy spread, and bunching performance of the linac front end under all operating conditions of the front end.

  5. TDLAS Test-stand Diagnostics Development for Velocity, Temperature, Efficiency, and Erosion for Space Shuttle Main Engines Project

    National Aeronautics and Space Administration — We propose here to develop tunable diode laser spectroscopy as a diagnostic for the Space Shuttle main engines during test stand operations. These engines represent...

  6. THE DETERMINATION OF THE STATISTICAL PARAMETERS OF THE CONVERTERS IN CIRCUITS TEST STANDS FOR TRACTION MOTORS OF THE LOCOMOTIVE

    V. M. Bezruchenko; O. L. Marenych

    2008-01-01

    In the article the method of static converters parameters calculation is resulted. It is proposed to replace the electromachine linear generator and balancing booster with static converters in the scheme of the traditional stand for test of locomotives traction engines.

  7. The use of an aircraft test stand for VTOL handling qualities studies. [pilot evaluation of flight controllability

    Pauli, F. A.; Corliss, L. D.; Selan, S. D.; Gerdes, R. M.; Gossett, T. D.

    1974-01-01

    The VTOL flight tests stand for testing control concepts on the X-14B VSS aircraft in hover, is described. This stand permits realistic and safe piloted evaluation and checkout of various control systems and of parameter variations within each system to determine acceptability to the pilot. Pilots can use it as a practical training tool to practice procedures and flying techniques and become familiar with the aircraft characteristics. Some examples of test experience are given. The test stand allows the X14B to maneuver in hover from centered position + or - 9.7 deg in roll and + or - 9.3 deg in pitch, about + or - 6 deg in yaw, and + or - 15 cm in vertical translation. The unique vertical free flight freedom enables study of liftoffs and landings with power conditions duplicated. The response on the stand agrees well with that measured in free hovering flight, and pilot comments confirm this.

  8. Superconducting Focusing Lenses for the SSR1 Cryomodule of PXIE Test Stand at Fermilab

    DiMarco, J. [Fermilab; Tartaglia, M. [Fermilab; Terechkine, I. [Fermilab

    2016-01-01

    Five solenoid-based focusing lenses designed for use inside the SSR1 cryomodule of the PXIE test stand at Fermilab have been fabricated and tested. In addition to a focusing solenoid, each lens is equipped with a set of windings that generate magnetic field in the transverse plane and can be used in the steering dipole mode or as a skew quadrupole corrector. The lenses will be installed between superconducting cavities in the cryomodule, so getting sufficiently low fringe magnetic field was one of the main design requirements. Beam dynamics simulations indicated a need for high accuracy positioning of the lenses in the cryomodule, which triggered a study towards understanding uncertainties of the magnetic axis position relative to the geometric features of the lens. This report summarizes the efforts towards certification of the lenses, including results of performance tests, fringe field data, and uncertainty of the magnetic axis position.

  9. The stripping foil test stand in the Linac4 transfer line

    The 160 MeV H- beam from the Linac4 (L4) linear accelerator at CERN will be injected into the proton synchrotron booster (PSB) with a new H- charge-exchange injection system. It will include a stripping foil, to convert H- into protons by stripping off the electrons. To gain experience with these very fragile foils, prior to the installation in the PSB, and test different foil materials and thicknesses, lifetimes of the foils, the foil changing mechanism and interlocking functions, a stripping foil test stand will be installed in the L4 transfer line in 2015. This paper describes the mechanical design of the system and discusses the test possibilities and parameters. (author)

  10. The stripping foil test stand in the Linac4 transfer line

    Weterings, W; Noulibos, R; Sillanoli, Y; van Trappen, P

    2015-01-01

    The 160 MeV H− beam from the Linac4 (L4) linear accelerator at CERN will be injected into the proton synchrotron booster (PSB) with a new H− charge-exchange injection system. It will include a stripping foil, to convert H− into protons by stripping off the electrons. To gain experience with these very fragile foils, prior to the installation in the PSB, and test different foil materials and thicknesses, lifetimes of the foils, the foil changing mechanism and interlocking functions, a stripping foil test stand will be installed in the L4 transfer line in 2015. This paper describes the mechanical design of the system and discusses the test possibilities and parameters.

  11. INTER-RATER AND INTRA-RATER RELIABILITY OF ACTIVE HIP ABDUCTION TEST FOR STANDING INDUCED LOW BACK PAIN

    Mansi Shah; Pravin Aaron; Subin Solomen

    2015-01-01

    Background: Active hip abduction test (AHAbd) has previously been shown to be a reliable tool for predicting low back pain development during a prolonged standing exposure in previously asymptomatic individuals, but the reliability of AHAbd on patients with standing induced occupational low back pain has not been established. As it is an observation based test, reliability among different raters and same rater must be established. The purpose of this study was to investigate the inter-rater ...

  12. Test-retest reliability of sensor-based sit-to-stand measures in young and older adults

    Regterschot, G. Ruben H.; Zhang, Wei; Baldus, Heribert; Stevens, Martin; Zijlstra, Wiebren

    2014-01-01

    This study investigated test-retest reliability of sensor-based sit-to-stand (STS) peak power and other STS measures in young and older adults. In addition, test-retest reliability of the sensor method was compared to test-retest reliability of the Timed Up and Go Test (TUGT) and Five-Times-Sit-to-S

  13. Diagnostic experiments at a 3 MeV test stand at Rutherford Appleton Laboratory (United Kingdom)

    A front end is currently under construction consisting of a H- Penning ion source (65 keV, 60 mA), low energy beam transport (LEBT), and radio frequency quadrupole (3 MeV output energy) with a medium energy beam transport suitable for high power proton applications. Diagnostics can be divided either in destructive techniques such as beam profile monitor, pepperpot, slit-slit emittance scanner (preferably used during commissioning) or nondestructive, permanently installed devices such as photodetachment-based techniques. Another way to determine beam distributions is a scintillator with charge-coupled device camera. First experiments have been performed to control the beam injection into the LEBT. The influence of beam parameters such as particle energy and space-charge compensation on the two-dimensional distribution and profiles will be presented.

  14. Laser based beam diagnostic for the RAL Front End Test Stand (FETS)

    For the diagnostic of high power particle beams, non-destructive measurement devices provide minimum influence on the beam and avoid various problems in connection with the high power density on surfaces. An H- ion beam offers the opportunity of non destructive beam diagnostics based on the effect of photo detachment. By the interaction of light with H- ions, the additional electron can be detached and a small number of neutrals will be produced. An additional magnetic dipole field can then be used to separate the detached electrons and neutrals from the ions. Using an integral detector the spatial distribution of the beam ion density can be derived, while the use of a spatial resolving detector enables to determine the phase space distribution. To investigate the measurement principle of the latter, a test stand was set up at the IAP in Frankfurt. This system will now be adopted to the requirements of the Front End Test Stand at CCLRC/ RAL. The aim of this FETS is to demonstrate a chopped H- beam of 60mA at 3MeV and 50pps with sufficiently high beam quality. The paper will present a detailed description of the proposed set up at RAL and discuss several results of simulations and experimental data gained in Frankfurt

  15. Pilot Field Test: Performance of a Sit-to-Stand Test After Long-Duration Space Flight

    Kofman, I. S.; Reschke, M. F.; Cerisano, J. M.; Fisher, E. A.; Phillips, T. R.; Rukavishnikov, I. V.; Kitov, V. V.; Lysova, N. Yu; Lee, S. M. C.; Stenger, M. B.; Bloomberg, J. J.; Mulavara, A. P.; Tomilovskaya, E. S.; Kozlovskaya, I. B.

    2016-01-01

    BACKGROUND: Astronauts returning from the International Space Station are met by a team of recovery personnel typically providing physical assistance and medical support immediately upon landing. That is because long-duration spaceflight impacts astronauts' functional abilities. Future expeditions to planets or asteroids beyond the low Earth orbit, however, may require crewmembers to egress the vehicle and perform other types of physical tasks unassisted. It is therefore important to characterize the extent and longevity of functional deficits experienced by astronauts in order to design safe exploration class missions. Pilot Field Test (PFT) experiment conducted with participation of ISS crewmembers traveling on Soyuz expeditions 34S - 41S comprised several tasks designed to study the recovery of sensorimotor abilities of astronauts during the first 24 hours after landing and beyond. METHODS: The first test in the PFT battery sequence, and also the least demanding one from the sensorimotor perspective, was a Sit-to-Stand test. Test subjects were seated in the chair and had to stand up on command and remain standing for ten seconds. The subjects were instructed to stand up unassisted as quickly as they were able to, while maintaining postural control. Synchronized wireless inertial sensors mounted on the head, chest, lower back, wrists, and ankles were used to continuously log body kinematics. Crewmembers' blood pressure and heart rate were monitored and recorded with the Portapres and Polar systems. Each session was recorded with a digital video camera. During data collections occurring within the 24-hour postflight period, crewmembers were also asked to (1) evaluate their perceived motion sickness symptoms on a 20-point scale before and after completion of the test and (2) estimate how heavy they felt compared to their normal (preflight) body weight. Consent to participate in PFT was obtained from 18 crewmembers (11 US Orbital Segment [USOS] astronauts and 7

  16. Design validation test stand guide inserts for the Spallation Neutron Source

    Successful operation of the Spallation Neutron Source (SNS) Facility in Oak Ridge, Tennessee depends on providing guide systems that channel neutrons to each experimental instrument position with a minimum loss in flux. These guide systems originate approximately 1 m from the moderator and pass through Shutter Gates. The guide sections passing through the Shutter Gate, called Shutter Inserts, align with features separate from the Shutter Gate. These features are located on the first guide section called the Core Vessel Insert. This arrangement accommodates accurate alignment of the guide system without requiring accurate alignment of the heavy Shutter Gate. These Core Vessel and Shutter Inserts are being developed for the SNS Facility and will be tested in the Design Validation Test Stand (DVTS). This paper addresses the DVTS Core Vessel and Shutter Inserts. (author)

  17. Design and fabrication of the cryosorption panel for KSTAR NBI test stand

    Test Stand for KSTAR NBI is now fabricating to test the ion source and beamline component for development of the KSTAR NBI heating system at KAERI. Required pumping speed for stable beam transportation is about 5.0 x 105 L/s at this system. On this purpose, cryosorption type pumps (2 sets) were designed and they are now fabricating. The size of the pumps is 2.0m(W)x2.0m(H)x 0.15(D), and they'll be installed at both sides of the NBI beam chamber respectively. The area of the cryopanel pasted with activated carbon is 2 x 1.75m x 1.75m, and it'll be expected to have the pumping speed of 1 x 105L/s·m2. Here we explained the detail design parameters, and discussed several difficulties in fabricating the pump

  18. Does Standing on a Cycle-ergometer, Towards the Conclusion of a Graded Exercise Test, Yield Cardiorespiratory Values Equivalent to Treadmill Testing?

    Mitchell, Joshua; KIST, WILLIAM B.; MEARS, KENDALL; NALLS, JESSE; RITTER, KYLE

    2010-01-01

    Graded exercise testing (GXT), per a cycle-ergometer (CE), offers safety and monitoring advantages over treadmill (TM) GXT. Unfortunately, CE-VO2max and some other cardiorespiratory (CR) variables are frequently lower than TM-GXT values. It has been difficult to compare TM and CE-GXT values. However, it was hypothesized that standing towards the conclusion of the CE-GXT (Stand-CE) might increase CE values to those equal to TM-GXT. If Stand-CE and TM-GXT CR values were equal, Stand-CE-GXT coul...

  19. Performance evaluation of 352.21 MHz, 1 MW klystrons and circulators at high power pulsed test stand at RRCAT

    A 1 MW pulsed test stand operating at 352.21 MHz was set up at RRCAT for tests and qualification of components and devices for the pulsed proton linac program. The test facility comprises of an indigenously built 100kV solid state bouncer modulator, WR 2300 waveguide system, high power circulator and high power RF load. The test facility has stand alone control system for taking the measurement data. We have used the test stand to qualify the 1 MW CW klystrons and circulators obtained from CERN under DAE CERN Collaboration for use in LEHIPA project of BARC and H- pulsed proton Linac at RRCAT. The present paper describes the test results of the qualifications done on the 1MW klystron and 1MW three port circulators for the LEHIPA project as well as for pulsed proton linac at RRCAT. (author)

  20. Posturographic performance and repeatability of the computerized sit-to-stand test: preliminary results.

    Rahmatullah, Arnan; Panta, Manoj; Geib, Roy W; Waite, Gabi N; Pagnacco, Guido; Oggero, Elena

    2015-01-01

    Each year, one in every three adults over the age of 65 falls often with injury. While this public health problem can be substantially reduced with simple interventions such as vestibular rehabilitation, balance assessments are not routinely done in the clinic, and less than half of affected adults talk to their physicians about such concerns. The goal of this study is to investigate distinct posturographic parameters of the computerized Sit-to-Stand (StS) Test to determine between- and within- subject variability of these. The CAPS® Professional system and the BalanceTRAK® software were used to collect ten repetitions of the StS from 25 subjects. The inclusion criteria included a questionnaire investigating the subject’s health status, the presence of known vestibular health concerns or illnesses, and the ability to maintain balance while standing. Significant variation between and within subjects were found for all posturographic parameters considered in this study. However, no fatigue or learning effects were found among the ten repetitions. PMID:25996700

  1. Tandem Mirror Experiment-Upgrade neutral beam test stand: A powerful tool for development and quality assurance

    During construction of the Tandem Mirror Experiment-Upgrade (TMX-U), a test stand was assembled to develop electronics for the neutral beam system. In the first six months of test stand use the authors operated a few neutral beam injector modules and directed considerable effort toward improving the electronic system. As system development progressed, the focus turned toward improving the injector modules themselves. The test stand has proved to be the largest single contributor to the successful operation of neutral beams on TMX-U, primarily because it provides quality assurance and development capability in conjunction with the scheduled activities of the main experiment. This support falls into five major categories: (1) electronics development, (2) operator training, (3) injector module testing and characterization, (4) injector module improvements, and (5) physics improvements (through areas affected by injector operation). Normal day-to-day operation of the test stand comes under the third category, testing and characterization, and comprises the final quality assurance activity for newly assembled or repaired modules before they are installed on TMX-U. They have also used the test stand to perform a series of physics experiments, including: reducing gas flow through valve and arc chamber characterization, reducing impurities by titanium gettering, and reducing streaming gas using apertures and collisional gas dynamics

  2. Integrated System Health Management (ISHM) for Test Stand and J-2X Engine: Core Implementation

    Figueroa, Jorge F.; Schmalzel, John L.; Aguilar, Robert; Shwabacher, Mark; Morris, Jon

    2008-01-01

    ISHM capability enables a system to detect anomalies, determine causes and effects, predict future anomalies, and provides an integrated awareness of the health of the system to users (operators, customers, management, etc.). NASA Stennis Space Center, NASA Ames Research Center, and Pratt & Whitney Rocketdyne have implemented a core ISHM capability that encompasses the A1 Test Stand and the J-2X Engine. The implementation incorporates all aspects of ISHM; from anomaly detection (e.g. leaks) to root-cause-analysis based on failure mode and effects analysis (FMEA), to a user interface for an integrated visualization of the health of the system (Test Stand and Engine). The implementation provides a low functional capability level (FCL) in that it is populated with few algorithms and approaches for anomaly detection, and root-cause trees from a limited FMEA effort. However, it is a demonstration of a credible ISHM capability, and it is inherently designed for continuous and systematic augmentation of the capability. The ISHM capability is grounded on an integrating software environment used to create an ISHM model of the system. The ISHM model follows an object-oriented approach: includes all elements of the system (from schematics) and provides for compartmentalized storage of information associated with each element. For instance, a sensor object contains a transducer electronic data sheet (TEDS) with information that might be used by algorithms and approaches for anomaly detection, diagnostics, etc. Similarly, a component, such as a tank, contains a Component Electronic Data Sheet (CEDS). Each element also includes a Health Electronic Data Sheet (HEDS) that contains health-related information such as anomalies and health state. Some practical aspects of the implementation include: (1) near real-time data flow from the test stand data acquisition system through the ISHM model, for near real-time detection of anomalies and diagnostics, (2) insertion of the J-2X

  3. JAERI Fuel Cleanup System (J-FCU) stand-alone tritium test at the TSTA

    JAERI designed, fabricated, and installed the JAERI Fuel Cleanup System (J-FCU) as a subsystem of simulated fusion fuel loop at the TSTA. The main function of the J-FCU is to purify and to recover hydrogen isotopes from simulated plasma exhaust while exhausting tritium free impurities. J-FCU has been in tritium test since March, 1991. Ceramic electrolysis cell (CEC) was replaced with its spare on January 1992. The stand-alone tritium test was performed with full impurities (N2, CQ4 and Q2O etc.) on February, 1992. Main purpose of this test was to evaluate the J-FCU total integrity and function with full impurities after replacing CEC. During this test, plugging of Cold Trap (CT) occurred twice and about 500 Ci of tritium exhausted to the Tritium Waste Treatment system (TWT). The safety interlock of the J-FCU acted well, so operation was carried out safely. This report describes the detail results of the above test and discuss its functions and difficulties. (author)

  4. Temperature Measurement and Water Flow Calorimetry for the Neutral Beam Test Stand Operation at KAERI

    Temperature measurements during the beam line operation of the neutral beam test stand(NB-TS) is very important for the estimation of the absorbed energy by the beam line components such calorimeter and also for the temperature monitoring of the various components, and have been accomplished by the utilization of many of the thermocouples(TCs) installed onto the NB-TS and the data acquisition system(DAQ) based on the National Instruments' (NI) SCXI system. Preliminary estimations of the absorbed energy by the calorimeter during the beam extraction have been made. Greater efforts for the noise reduction in the TC signal acquisition has been made with partial success. We present the status of the temperature measurement and water flow calorimetry(WFC) related to the NB-TS operations

  5. RF-Breakdown kicks at the CTF3 two-beam test stand

    Palaia, Andrea; Muranaka, Tomoko; Ruber, Roger; Ziemann, V; Farabolini, W

    2012-01-01

    The measurement of the effects of RF-breakdown on the beam in CLIC prototype accelerator structures is one of the key aspects of the CLIC two-beam acceleration scheme being addressed at the Two-beam Test Stand (TBTS) at CTF3. RF-breakdown can randomly cause energy loss and transverse kicks to the beam. Transverse kicks have been measured by means of a screen intercepting the beam after the accelerator structure. In correspondence of a RFbreakdown we detect a double beam spot which we interpret as a sudden change of the beam trajectory within a single beam pulse. To time-resolve such effect, the TBTS has been equipped with five inductive Beam Position Monitors (BPMs) and a spectrometer line to measure both relative changes of the beam trajectory and energy losses. Here we discuss the methodology used and we present the latest results of such measurements

  6. How well does the 30-second Chair Stand Test predict rehabilitation needs?

    Hansen Bruun, Inge; Nørgaard, Birgitte; Backer Mogensen, Christian; Maribo, Thomas

    Background The assessment of acutely admitted elderly medical patients’ need for rehabilitation is statutory and important for their independence. However, in an emergency department the assessment can be difficult as it has to be performed within 48 hours, when functional performance may be...... of functional decline. The 30-Second Chair Stand Test (30s-CST) is recommended by the Danish Health and Medicines Authority for screening of functional decline in elderly citizens living in their own home. However, its validity with hospitalized patients is undocumented, and it is unclear whether...... validated for use with such patients whose stay exceeds 48 hours. Our study aims to: - Investigate the face validity of 30s-CST and DEMMI for mobility assessment of acutely admitted elderly medical patients - Identify predictive indicators of hospitalized elderly medical patients’ need for rehabilitation...

  7. A new laser test stand for simulating charged-particle tracks

    We report on the construction of a new laser test stand equipped with a 1064 nm pulsed infrared YAG laser for simulating the passage of a charged particle in a silicon detector. The standard semiconductor repairing tool, the so-called laser-cutter, has been modified to have a newly developed optics which has the ability to reduce the light by the order of 106-108 and to adjust the spot size to several microns. As an application we measured the position dependence of the induced signals in a silicon-strip detector when the laser light hits in the region between the strips. The measurement has shown that this device is very effective in evaluating the detailed response of a silicon detector without using charged particles generated by accelerators. (orig.)

  8. Preliminary Measurement of Beam Power Transmission in KSTAR Neutral Beam Test-Stand

    A neutral beam test-stand (NBTS) was constructed to develop 300-sec deuterium beam extraction of 120 kV/65 A as an auxiliary heating system of KSTAR. The ion source is composed of a plasma generator and a tetrode accelerator. The beamline components include an optical multi-channel analyzer (OMA) duct, a neutralizer, a bending magnet (BM), an ion dump, a calorimeter, and a cryo-sorption pump system. Beam deposition along the NBTS has been measured by water flow calorimetry (WFC) and 96 % of the extracted beam power (Vacc·Iacc) was counted for a beam of 97 kV/22.2 A. Maximum power transmission efficiency, which is the ratio of transmitted power on the calorimeter to the extracted beam power, was 0.77 with an optimum perveance of 1.1 microperv

  9. Converter-Modulator Design and Operations for the ILC L-band Test Stand

    To facilitate a rapid response to the International Linear Collider (ILC) L-band development program at SLAC, a spare converter-modulator was shipped from LANL. This modulator was to be a spare for the spallation neutron source (SNS) accelerator at ORNL. The ILC application requires a 33% higher peak output power (15 MW) and output current (120 Amp). This presents significant design challenges to modify the existing hardware and yet maintain switching parameters and thermal cycling within the semiconductor component ratings. To minimize IGBT commutation and free-wheeling diode currents, a different set of optimizations, as compared to the SNS design, were used to tune the resonant switching networks. Additional complexities arose as nanocrystalline cores with different performance characteristics (as compared to SNS), were used to fabricate the resonant 'boost' transformers. This paper will describe the electrical design, modeling efforts, and resulting electrical performance as implemented for the ILC L-band test stand

  10. Small-Scale Hybrid Rocket Test Stand & Characterization of Swirl Injectors

    Summers, Matt H.

    Derived from the necessity to increase testing capabilities of hybrid rocket motor (HRM) propulsion systems for Daedalus Astronautics at Arizona State University, a small-scale motor and test stand were designed and developed to characterize all components of the system. The motor is designed for simple integration and setup, such that both the forward-end enclosure and end cap can be easily removed for rapid integration of components during testing. Each of the components of the motor is removable allowing for a broad range of testing capabilities. While examining injectors and their potential it is thought ideal to obtain the highest regression rates and overall motor performance possible. The oxidizer and fuel are N2O and hydroxyl-terminated polybutadiene (HTPB), respectively, due to previous experience and simplicity. The injector designs, selected for the same reasons, are designed such that they vary only in the swirl angle. This system provides the platform for characterizing the effects of varying said swirl angle on HRM performance.

  11. Numerical modeling of a 2K J-T heat exchanger used in Fermilab Vertical Test Stand VTS-1

    Gupta, Prabhat Kumar [Raja Ramanna Centre for Advanced Technology (RRCAT), Indore (MP), India; Rabehl, Roger [FNAL

    2014-07-01

    Fermilab Vertical Test Stand-1 (VTS-1) is in operation since 2007 for testing the superconducting RF cavities at 2 K. This test stand has single layer coiled finned tubes heat exchanger before J-T valve. A finite difference based thermal model has been developed in Engineering Equation Solver (EES) to study its thermal performance during filling and refilling to maintain the constant liquid level of test stand. The model is also useful to predict its performance under other various operating conditions and will be useful to design the similar kind of heat exchanger for future needs. Present paper discusses the different operational modes of this heat exchanger and its thermal characteristics under these operational modes. Results of this model have also been compared with the experimental data gathered from the VTS-1 heat exchanger and they are in good agreement with the present model.

  12. Design and development of RF system for vertical test stand for characterization of superconducting RF cavities

    RRCAT is developing a Vertical Test Stand (VTS) to test and qualify 1.3 GHz/650 MHz, SCRF Cavities in collaboration with Fermi National Accelerator Laboratory (FNAL) under Indian Institutions' Fermilab Collaboration. The technical details for VTS is being provided by FNAL, USA. The RF System of VTS needs to provide stable RF power to SCRF cavity with control of amplitude, relative phase and frequency. The incident, reflected, transmitted power and field decay time constant of the cavity are measured to evaluate cavity performance parameters (E, Qo). RF Power is supplied via 500 W Solid State amplifier, 1270-1310 MHz being developed by PHPMS, RRCAT. VTS system is controlled by PXI Platform and National Instruments LabVIEW software. Low Level RF (LLRF) system is used to track the cavity frequency using Phase Locked Loop (PLL). The system is comprised of several integrated functional modules which would be assembled, optimized, and tested separately. Required components and instruments have been identified and procurement for the same is underway. Inhouse development for the Solid State RF amplifier and instrument interfacing is in progress. This paper describes the progress on the development of the RF system for VTS. (author)

  13. Safety and diagnostic systems on the Liquid Lithium Test Stand (LLTS)

    Schwartz, J. A.; Jaworski, M. A.; Ellis, R.; Kaita, R.; Mozulay, R.

    2013-10-01

    The Liquid Lithium Test Stand (LLTS) is a test bed for development of flowing liquid lithium systems for plasma-facing components at PPPL. LLTS is designed to test operation of liquid lithium under vacuum, including flowing, solidifying (such as would be the case at the end of plasma operations), and re-melting. Constructed of stainless steel, LLTS is a closed loop of pipe with two reservoirs and a pump, as well as diagnostics for temperature, flow rate, and pressure. Since liquid lithium is a highly reactive material, special care must be taken when designing such a system. These include a permanent-magnet MHD pump and MHD flow meter that have no mechanical components in direct contact with the liquid lithium. The LLTS also includes an expandable 24-channel leak-detector interlock system which cuts power to heaters and the pump if any lithium leaks from a pipe joint. Design for the interlock systems and flow meter are presented. This work is supported by US DOE Contract DE-AC02-09CH11466.

  14. Design and testing of a new stand for the BOMAB family of phantoms

    A new stand has been designed to support the Bottle Manikin Absorber Phantoms when the phantoms are counted in the vertical position in a whole-body counter. The stand previously used by the Human Monitoring Laboratory was constructed from metal and was heavy to transport and making height adjustments to accommodate different phantom sizes was very time consuming. The new stand is constructed from lightweight plastic materials and allows easy height adjustments to accommodate different phantom sizes while supporting the weight of the phantoms. The stand was evaluated inside a whole-body counter at a nuclear-generating station and met all operational requirements for accessibility and ease of use. (authors)

  15. Role of prototype ground-test stands in developing transportable nuclear power installations

    Naval and shipborne (transportable) nuclear power installations (NPI) must incorporate the main constituents of the power installations of nuclear power plants (NPP) and meet some distinguishing specifications. Firstly as a direct consequence of the higher power-to-weight ratio of the installation (due to severe restrictions on its weight and size parameters), the power intensity of the core of the transportable NPI is higher than that of the cores used in NPP. Secondly, in view of the space constraints, a close arrangement of the equipment is necessary. Thirdly, the highly autonomous nature of the transportable NPI increases the stringency of the specifications with respect to the reliability and the service life of NPI that are realized, as a rule, by ensuring high reliability of the individual components and by reserving the extremely important elements (spares) of the systems of the installations. Furthermore, the required overall reliability of the installation and minimization of the number of operators calls for a high degree of automatic control. The prototype stand is a powerful facility for solving the problems related to the development and the assimilation of the newly designed transportable NPI. Its efficiency would be maximum if it is put into operation 2-3 years before completing the construction of the prototype NPI of a given type. In order to ensure efficient operation, it must satisfy certain conditions among which the most important ones are ensuring maximum identity of NPI tested using the stand and the newly created series-produced NPI, availability of powerful facilities for collecting, possessing and storing the obtained information, inclusion of a modeling complex based on the modern computer technology, and the presence of a well developed scientific infrastructure and a structure of the maintenance and engineering services

  16. Direct thrust measurement stand with improved operation and force calibration technique for performance testing of pulsed micro-thrusters

    A robust stand for directly measuring pulsed thrust from micro-thrusters is presented. The method of electrostatic discs for in situ calibration was improved upon and simplified to allow convenient and accurate thrust measurement. The novel use of frictionless liquid gallium metal power interfaces for µN-level force measurement stands was also demonstrated. A series of detailed verification tests were performed to characterize the thrust stand’s overall operating range and accuracy. The stand can test single and multiple thrusters with a total mass of up to 10 kg and was found to be capable of resolving impulse bits between 0.27–600 µNs with 2–4% error in the optimal deflection range. Demonstration of the thrust stand’s capability and resilience to electromagnetic interference was accomplished by performing lifetime thrust tests on low-power Vacuum-Arc Thrusters operating with three different cathode fuels. (paper)

  17. Orthostatic function during a stand test before and after head-up or head-down bedrest

    Lathers, Claire M.; Diamandis, Peter H.; Riddle, Jeanne M.; Mukai, Chiaki; Elton, Kay F.; Bungo, Michael W.; Charles, John B.

    1991-01-01

    The effects of head-down or head-up bedrest at -5, +10, +20, or +42 deg (simulating 0, 1/6, 1/3, and 2/3 g, respectively) for 6 hrs on four different days on the orthostatic tolerance were investigated by measuring relevant physiological reactions to orthostatic test taken before and after bedrest sessions. The multivariate analysis of variance statistical analyses indicates that there was no angle effect on any of the cardiovascular parameters monitored during the last 3 min of the stand test, suggesting that partial gravity loads would have no effect on the cardiovascular deconditioning exhibited postflight. There was, however, a significant elevation in the heart rate post-bedrest, and the heart rate increased on standing. Results from the stand test pre- and post-bedrest at -5 deg (but not at +10, +20, and +42 deg) were similar to those observed after space flight.

  18. Physical insights and test stand results for the LANSCE H- surface converter source

    The Los Alamos Neutron Science Center (LANSCE) H- surface converter source has been under development for several years to reach 25-40 mA current with 7(πcm-mrad) lab emittance (95% beam fraction). The duty factor is 12% (120 Hz, 1 ms pulse length). Summary test stand results and interpretations for a six filament axial extraction H- source are presented. This source did produce 40-mA H- current, but with unacceptable emittance growth. More recently a fourth, modified LANSCE H- production source with radial H- extraction system has been constructed, and is presently undergoing tests. Currents up to 25mA H- have been observed with 20% emittance growth. This emittance growth may be acceptable for 800 MeV linac operations. A summary of physical principles of emittance growth mechanisms and converter physics are given. Significant upgrades to the LANSCE 800-MeV linac and Proton Storage Ring (PSR) operations can be realized by development of an if ion source with laboratory emittance of 7(πcm-mrad) at 95% beam fraction with 20-40mA H- current. The source beam energy is 80keV and the duty factor (df) is 12%. A six-filament version of the surface converter source with axial if beam extraction was developed in a collaborative effort between Lawrence Berkeley National (LBNL) and Los Alamos National Laboratories (LANL). Although this source did produce 40-mA H- current, an unexpected emittance growth factor of 2.5 made these higher current beams unacceptable for LANSCE operations. A subsequent decision was made to fabricate and develop a fourth production source to produce 25-mA H- current with an emittance growth of no greater than 20%. The source upgrade technology would be used in a 750-keV H-. injector B at LANSCE. Experiments and analysis on the six-filament axial extraction source will be reviewed in the next section. Evidence is given that at the higher discharge power characteristic of this source, two beams are formed at extraction. The two beams originate in

  19. Three-Month Test-Retest Reliability of Center of Pressure Motion During Standing Balance in Individuals with Multiple Sclerosis

    Wajda, Douglas A.; Motl, Robert W.

    2016-01-01

    Background: Balance impairment and an increased rate of falls are commonly reported in individuals with multiple sclerosis (MS). Force platform–generated center of pressure (COP) metrics have previously been recommended as an outcome measure to quantify balance deficits and distinguish between fallers and nonfallers in MS. Information is limited regarding the preservation of postural control in individuals with MS over extended time frames in the absence of an intervention. This report examines the test-retest reliability and magnitude of change of COP motion during standing balance over 3 months. Methods: Twenty individuals with MS and a history of falling underwent testing on two occasions 3 months apart in the absence of an intervention. On both occasions, participants completed two 30-second trials of three conditions: eyes open, eyes closed, and eyes open with concurrent cognitive challenge (dual task). Measures of COP area, velocity, and temporal structure were calculated and included in the reliability analysis. Results: The COP metrics displayed fair-to-excellent reliability over 3 months without an intervention. Reliability was maintained across the three commonly used balance conditions. Conclusions: These results offer insight into the reliability of COP measures over a 3-month period in MS and can inform the use of COP metrics for future study design (eg, sample size estimates) and balance outcome assessment during randomized controlled trials and fall-prevention studies in individuals with MS. PMID:27134578

  20. Pilot Field Test: Performance of a Sit-to-Stand Test After Long-Duration Space Flight

    Kofman, I. S.; Reschke, M. F.; Cerisano, J. M.; Fisher, E. A.; May-Phillips, T. R.; Rukavishnikov, I. V.; Kitov, V. V.; Lysova, N. U.; Lee, S. M. C.; Stenger, M. B.; Bloomberg, J. J.; Mulavara, A. P.; Tomilovskaya, E. S.; Kozlovskaya, I. B.

    2016-01-01

    Astronauts returning from the International Space Station (ISS) are met by a team of recovery personnel who typically provide physical assistance and medical support immediately after landing. This assistance and support are provided because long-duration spaceflight greatly affects astronauts' functional abilities. Future expeditions to planets or asteroids beyond low Earth orbit, however, will require crewmembers to egress the vehicle and perform other types of physical tasks unassisted. It is therefore important to characterize the extent and longevity of functional deficits experienced by astronauts in order to design safe exploration-class missions. A joint US/Russian Pilot Field Test (PFT) study conducted with participation of crewmembers of ISS Expeditions 35-42 comprised several tasks designed to study the recovery of sensorimotor abilities of astronauts during the first 24 hours after landing and beyond. Sit-to-Stand (S2S) was the first task in the PFT battery.

  1. Stand for developing and testing the processes and equipment of the pyrochemical methods of nuclear fuel management

    The report summarizes the experience on developing and operating in RIAR's Chemical Technology Division a versatile stand designed for obtaining of experimental data on the process parameters of the currently developed non-aqueous processes of nuclear fuel management and on the peculiarities of the test equipment operation. The experiments carried out at the Stand according to the process requirements and the requirements of the equipment remote servicing are maximally approximated to the experimental processes with real irradiated fuel. The versatility of the Stand allows accomplishing a wide range of experimental tasks including those related to investigation of the processes for implementation of the closed fuel cycle. The report presents the data on the Stand structure and interior arrangement as well as on the configuration of the main and ancillary equipment. The report presents information on a number of 'cold' experiments carried out using the Stand. In order to check new design approaches, it is planned to arrange in the simulated shielded cell of the Stand the research complex of semi-industrial-scale equipment: the apparatus for pyrochemical reprocessing of spent nuclear fuel (SNF) and the furnace for vitrification of high-level wastes arisen from SNF reprocessing by nonaqueous methods. (authors)

  2. Profile and Emittance Measurements at the CERN LINAC4 3 MeV test Stand

    Zocca, F; Duraffourg, M; Focker, GJ; Gerard, D; Raich, U; Roncarolo, F

    2013-01-01

    A new 160 MeV H- Linac named Linac-4 will be built at CERN to replace the old 50 MeV proton Linac. The ion source, the 3 MeV Radio Frequency Quadrupole (RFQ) and the Medium Energy Beam Transport (MEBT) line hosting a chopper, have been commissioned in a dedicated test stand. Wire grids and wire scanners were used to measure the transverse beam profile and a slit/grid emittance meter was installed on a temporary test bench plugged at the RFQ and MEBT exit in different stages. The emittance meter slit was also used as a scanning scraper able to reconstruct the transverse profile by measuring the transmission with a downstream current transformer. On the same measurement bench, a spectrometer in conjunction with a wire grid allowed measuring the energy spread of the particles. This paper summarizes the measurement results that allowed characterizing the 3 MeV beam and discusses the present understanding of monitor performance.

  3. The Renaissance: A test-stand for the Forward CMS Pixel Tracker assembly

    The CMS Forward Pixel Tracker will consist of two end-cap blocks, each made of two disks lodging sensors and Read-Out Chips (ROCs) (grouped into plaquettes of different sizes) for a total of about 18 million read-out channels. During the assembly phase, prior to the physical mounting of the plaquettes on the disks a thorough electronic test is necessary to check each channel for functionality, noise level, required threshold trimming and bump-bond quality. To this extent a complete test-stand system, based on custom PCI cards and specialized software, has been developed. Different methods have been evaluated and implemented to electronically assess the amount of malfunctioning bump-bonds. Determination of the correct parameters for initialization of the ROCs has also been implemented as an automatic procedure; data are finally fed into a centralized database for subsequent retrieval during detector initialization or for off-line analysis. In this paper we describe requirements, design and implementation of such a system, which is currently in use at the Silicon Detector Facility (SiDet) Laboratory of FNAL for the final assembly of the Forward Tracker system

  4. The Renaissance: A test-stand for the Forward CMS Pixel Tracker assembly

    Menasce, Dario; Turqueti, Marcos; Uplegger, Lorenzo

    2007-09-01

    The CMS Forward Pixel Tracker will consist of two end-cap blocks, each made of two disks lodging sensors and Read-Out Chips (ROCs) (grouped into plaquettes of different sizes) for a total of about 18 million read-out channels. During the assembly phase, prior to the physical mounting of the plaquettes on the disks a thorough electronic test is necessary to check each channel for functionality, noise level, required threshold trimming and bump-bond quality. To this extent a complete test-stand system, based on custom PCI cards and specialized software, has been developed. Different methods have been evaluated and implemented to electronically assess the amount of malfunctioning bump-bonds. Determination of the correct parameters for initialization of the ROCs has also been implemented as an automatic procedure; data are finally fed into a centralized database for subsequent retrieval during detector initialization or for off-line analysis. In this paper we describe requirements, design and implementation of such a system, which is currently in use at the Silicon Detector Facility (SiDet) Laboratory of FNAL for the final assembly of the Forward Tracker system.

  5. A stand for simulation and test of the magnetic components of the focus beam and transport systems for accelerator LUE-200, installation IREN

    Technical parameters and physical abilities of the equipment stand for simulation and testing of the dipole electromagnet to focus and transport the beam of the linear accelerator (LUE-200) are described. The overall design of the stand, a description of the magnetometer and the positioning system of Hall sensors are presented. The software of the stand has been developed

  6. Tandem mirror experiment-upgrade neutral beam test stand: a powerful tool for development and quality assurance

    During construction of the Tandem Mirror Experiment-Upgrade (TMX-U), we assembled a test stand to develop electronics for the neutral beam system. In the first six months of test stand use we operated a few neutral beam injector modules and directed considerable effort toward improving the electronic system. As system development progressed, our focus turned toward improving the injector modules themselves. The test stand has proved to be the largest single contributor to the successful operation of neutral beams on TMX-U, primarily because it provides quality assurance andd development capability in conjunction with the scheduled activities of the main experiment. This support falls into five major categories: (1) electronics development, (2) operator training, (3) injector module testing and characterization, (4) injector module improvements, and (5) physics improvements (through areas affected by injector operation). Normal day-to-day operation of the test stand comes under the third category, testing and characterization, and comprises our final quality assurance activity for newly assembled or repaired modules before they are installed on TMX-U

  7. Heavy Ion Storage Ring for Atomic Physics (HISTRAP) vacuum test stand for pressures of 10-12 Torr

    HISTRAP (Heavy Ion Storage Ring for Atomic Physics) is a proposed synchrotron/cooler/storage ring accelerator optimized for advanced atomic physics research. The ring has a circumference of 46.8 m, a bore diameter of /similar to/15 cm, and requires a vacuum of 10-12 Torr to decelerate highly charged, very heavy ions down to low energies. To be able to test components and procedures to achieve this pressure, a test stand approximately modeling 1/16 of the ring vacuum chamber has been built. The 3.5-m-long test stand has been fabricated from 10-cm-diam components, with 316LN stainless-steel flanges. Prior to assembly, these components were vacuum fired at 950 0C at a pressure of 10-4 Torr. The test stand is bakable in situ at 300 0C. Pumping is achieved with two 750 l/s titanium sublimator pumps and one 60 l/s ion pump. Pressure is measured with two extractor ion gauges and a 10-4 partial pressure residual gas analyser. The roughing for the test stand consists of cryosorption pumps followed by a cryopump. A pressure of 4 x 10-12 Torr has been achieved

  8. Performance of an MDT cosmic test stand a Monte Carlo evaluation

    Bagnaia, P; Ciapetti, G; De Salvo, A; Di Girolamo, A; Solfaroli, E

    2004-01-01

    The high level of mechanical accuracy in the wire location represents one of the main characteristics of the MDT chambers. The X-ray measurements performed at CERN have certified this accuracy; almost all the measured chambers have an r.m.s. respect to the nominal position below 20 mm. It has been also observed that, leaving free, in the fit to the measured wire grid, few global parameters, like the relative distance, the rotation and the angle between multilayers (chamber mechanical parameters), we can obtain a substantial improvement (up to 5-7 mm) in the wire r.m.s. that can boost the ultimate precision of the Atlas muon spectrometer. Only a small (10-15%) fraction of all MDTs can be X-ray inspected at the CERN Tomograph [2], but all the chambers are expected to be certified in a cosmic rays stand. We can therefore try to optimize the chamber geometrical parameters from the analysis of the cosmic rays data. The aim of this note is the Monte Carlo evaluation of the performance of a simple cosmic rays test f...

  9. Inferred Influence of Human Lateral Profile on Limb Load Asymmetry during a Quiet Standing Balance Test

    Longley,Christopher

    2008-06-01

    Full Text Available Although the identification and characterisation of a participant's lateral profile during quiet standing have not received much research attention, they have the potential to greatly extend our understanding of upright stance stability control. This study further examines limb load asymmetries during quiet bipedal stance. During voluntary frontal-plane weight shifting for 2 min, 300 centre-of-pressure displacements on 14 blindfolded right-handed young adults were recorded. Four biomechanical indices were used to assess postural behaviour. These were the bias of time and the magnitude of the partial ground reaction forces from both legs, and the bias in the number and magnitude of microshifts influencing stability. Our study identifies a significant level of asymmetry in the quiet bipedal stance of right-handed people. This asymmetry is associated with the right-sided bias of the ground reaction force and the angle of inclination to the upright (vertical centroidal line. We found that the initial lateralisation of the partial ground reaction forces from both feet, as well as the period of ground reaction force bias, are important elements in any clinical tests involving quiet bipedal stance.

  10. Measurements of high energy photons in Z-pinch experiments on primary test stand

    High energy photons are measured for the first time in wire-array Z-pinch experiments on the Primary Test Stand (PTS) which delivers a current up to 8 MA with a rise time of 70 ns. A special designed detecting system composed of three types of detectors is used to measure the average energy, intensity, and pulse waveform of high energy photons. Results from Pb-TLD (thermoluminescence dosimeter) detector indicate that the average energy is 480 keV (±15%). Pulse shape of high energy photons is measured by the photodiode detector consisted of scintillator coupled with a photodiode, and it is correlated with soft x-ray power by the same timing signal. Intensity is measured by both TLD and the photodiode detector, showing good accordance with each other, and it is 1010 cm−2 (±20%) at 2 m in the horizontal direction. Measurement results show that high energy photons are mainly produced in pinch regions due to accelerated electrons. PTS itself also produces high energy photons due to power flow electrons, which is one order smaller in amplitude than those from pinch region

  11. Measurements of high energy photons in Z-pinch experiments on primary test stand

    Si, Fenni; Zhang, Chuanfei; Xu, Rongkun; Yuan, Xi; Huang, Zhanchang; Xu, Zeping; Ye, Fan; Yang, Jianlun; Ning, Jiamin; Hu, Qingyuan; Zhu, Xuebin

    2015-08-01

    High energy photons are measured for the first time in wire-array Z-pinch experiments on the Primary Test Stand (PTS) which delivers a current up to 8 MA with a rise time of 70 ns. A special designed detecting system composed of three types of detectors is used to measure the average energy, intensity, and pulse waveform of high energy photons. Results from Pb-TLD (thermoluminescence dosimeter) detector indicate that the average energy is 480 keV (±15%). Pulse shape of high energy photons is measured by the photodiode detector consisted of scintillator coupled with a photodiode, and it is correlated with soft x-ray power by the same timing signal. Intensity is measured by both TLD and the photodiode detector, showing good accordance with each other, and it is 1010 cm-2 (±20%) at 2 m in the horizontal direction. Measurement results show that high energy photons are mainly produced in pinch regions due to accelerated electrons. PTS itself also produces high energy photons due to power flow electrons, which is one order smaller in amplitude than those from pinch region.

  12. Stand alone computer system to aid the development of Mirror Fusion Test Facility rf heating systems

    The Mirror Fusion Test Facility (MFTF-B) control system architecture requires the Supervisory Control and Diagnostic System (SCDS) to communicate with a LSI-11 Local Control Computer (LCC) that in turn communicates via a fiber optic link to CAMAC based control hardware located near the machine. In many cases, the control hardware is very complex and requires a sizable development effort prior to being integrated into the overall MFTF-B system. One such effort was the development of the Electron Cyclotron Resonance Heating (ECRH) system. It became clear that a stand alone computer system was needed to simulate the functions of SCDS. This paper describes the hardware and software necessary to implement the SCDS Simulation Computer (SSC). It consists of a Digital Equipment Corporation (DEC) LSI-11 computer and a Winchester/Floppy disk operating under the DEC RT-11 operating system. All application software for MFTF-B is programmed in PASCAL, which allowed us to adapt procedures originally written for SCDS to the SSC. This nearly identical software interface means that software written during the equipment development will be useful to the SCDS programmers in the integration phase

  13. Measurements of high energy photons in Z-pinch experiments on primary test stand

    Si, Fenni, E-mail: sifenni@163.com; Zhang, Chuanfei; Xu, Rongkun; Yuan, Xi; Huang, Zhanchang; Xu, Zeping; Ye, Fan; Yang, Jianlun; Ning, Jiamin; Hu, Qingyuan; Zhu, Xuebin [Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Sichuan, Mianyang 621900 (China)

    2015-08-15

    High energy photons are measured for the first time in wire-array Z-pinch experiments on the Primary Test Stand (PTS) which delivers a current up to 8 MA with a rise time of 70 ns. A special designed detecting system composed of three types of detectors is used to measure the average energy, intensity, and pulse waveform of high energy photons. Results from Pb-TLD (thermoluminescence dosimeter) detector indicate that the average energy is 480 keV (±15%). Pulse shape of high energy photons is measured by the photodiode detector consisted of scintillator coupled with a photodiode, and it is correlated with soft x-ray power by the same timing signal. Intensity is measured by both TLD and the photodiode detector, showing good accordance with each other, and it is 10{sup 10} cm{sup −2} (±20%) at 2 m in the horizontal direction. Measurement results show that high energy photons are mainly produced in pinch regions due to accelerated electrons. PTS itself also produces high energy photons due to power flow electrons, which is one order smaller in amplitude than those from pinch region.

  14. Preliminary experimental results of tungsten wire-array Z-pinches on primary test stand

    Huang, Xian-Bin; Zhou, Shao-Tong; Dan, Jia-Kun; Ren, Xiao-Dong, E-mail: amosrxd@163.com; Wang, Kun-Lun; Zhang, Si-Qun; Li, Jing; Xu, Qiang; Cai, Hong-Chun; Duan, Shu-Chao; Ouyang, Kai; Chen, Guang-Hua; Ji, Ce; Wei, Bing; Feng, Shu-Ping; Wang, Meng; Xie, Wei-Ping; Deng, Jian-Jun [Key Laboratory of Pulsed Power, Institute of Fluid Physics, China Academy of Engineering Physics, P.O. Box 919-108, Mianyang, Sichuan 621999 (China); Zhou, Xiu-Wen; Yang, Yi [Research Center of Laser Fusion, China Academy of Engineering Physics, P.O. Box 919-987, Mianyang, Sichuan 621999 (China)

    2015-07-15

    The Primary Test Stand (PTS) developed at the China Academy of Engineering Physics is a 20 TW pulsed power driver, which can deliver a ∼10 MA, 70 ns rise-time (10%–90%) current to a short-circuit load and has important applications in Z-pinch driven inertial confinement fusion and high energy density physics. Preliminary results of tungsten wire-array Z-pinch experiments on PTS are presented. The load geometries investigated include 15-mm-tall cylindrical single and nested arrays with diameter ranging from 13 mm to 30 mm, consisting of 132–300 tungsten wires with 5–10 μm in diameter. Multiple diagnostics were fielded to characterize the x-ray radiation from wire-array Z pinches. The x-ray peak power (∼50 TW) and total radiated energy (∼500 kJ) were obtained from a single 20-mm-diam array with 80-ns stagnation time. The highest x-ray peak power up to 80 TW with 2.4 ns FWHM was achieved by using a nested array with 20-mm outer diameter, and the total x-ray energy from the nested array is comparable to that of single array. Implosion velocity estimated from the time-resolved image measurement exceeds 30 cm/μs. The detailed experimental results and other findings are presented and discussed.

  15. Preliminary experimental results of tungsten wire-array Z-pinches on primary test stand

    The Primary Test Stand (PTS) developed at the China Academy of Engineering Physics is a 20 TW pulsed power driver, which can deliver a ∼10 MA, 70 ns rise-time (10%–90%) current to a short-circuit load and has important applications in Z-pinch driven inertial confinement fusion and high energy density physics. Preliminary results of tungsten wire-array Z-pinch experiments on PTS are presented. The load geometries investigated include 15-mm-tall cylindrical single and nested arrays with diameter ranging from 13 mm to 30 mm, consisting of 132–300 tungsten wires with 5–10 μm in diameter. Multiple diagnostics were fielded to characterize the x-ray radiation from wire-array Z pinches. The x-ray peak power (∼50 TW) and total radiated energy (∼500 kJ) were obtained from a single 20-mm-diam array with 80-ns stagnation time. The highest x-ray peak power up to 80 TW with 2.4 ns FWHM was achieved by using a nested array with 20-mm outer diameter, and the total x-ray energy from the nested array is comparable to that of single array. Implosion velocity estimated from the time-resolved image measurement exceeds 30 cm/μs. The detailed experimental results and other findings are presented and discussed

  16. Beam-Based Diagnostics of RF-Breakdown in the Two-Beam Test-Stand in CTF3

    Johnson, M

    2007-01-01

    The general outline of a beam-based diagnostic method of RF-breakdown, using BPMs, at the two-beam test-stand in CTF3 is discussed. The basic components of the set-up and their functions in the diagnostic are described. Estimations of the expected error in the measured parameters are performed.

  17. THE DETERMINATION OF THE STATISTICAL PARAMETERS OF THE CONVERTERS IN CIRCUITS TEST STANDS FOR TRACTION MOTORS OF THE LOCOMOTIVE

    V. M. Bezruchenko

    2008-11-01

    Full Text Available In the article the method of static converters parameters calculation is resulted. It is proposed to replace the electromachine linear generator and balancing booster with static converters in the scheme of the traditional stand for test of locomotives traction engines.

  18. Design aspects of a test stand for axial injection system of 20-100 MeV compact cyclotron

    To increase the injection intensity and efficiency, a test stand is designed for the axial injection system of 20-100 MeV compact cyclotron so as to implement the experimental study. The design aspects of test stand, including the optics of the beam line, the elements design etc., are described. Mostly the elements selection for the beam transportation from the Hsource to the central region of the cyclotron, the matching calculation and the elements design are considered. To investigate the injection system of 22 MeV and 70 MeV cyclotrons experimentally by the test stand, the design goal is to keep the layout of injection line, the dimensions of elements, the operation parameters as close as possible so that the setup of the stand is more easily. The designed system can meet the need of the H- beam injection for the cyclotron from 20 MeV to 100 MeV though the dimension of the solenoid, which is installed in the main magnet of the machine, should be changed due to the different size of the magnets

  19. Development and qualification of a specialized gas turbine test stand to research the potential benefits of nanocatalyst fuel additives

    Kraemer, Nathan A.

    2007-01-01

    Due to the wide use of gas turbine engines, any performance improvements would yield significant impacts to many military and civilian programs. While hardware upgrades require costly replacements to existing equipment, fuel performance enhancement could provide a near term cost effective solution. This thesis research focused on the development and qualification of a suitable test stand system to provide bench testing of nanocatalyst additives for jet fuels on a fullscale tactical gas ...

  20. Test Beam Results of a 3D Diamond Detector

    Dunser, Marc

    2015-01-01

    3D pixel technology has been used successfully in the past with silicon detectors for tracking applications. Recently, a first prototype of the same 3D technology has been produced on a chemical vapour deposited single-crystal diamond sensor. This device has been subsequently tested in a beam test at CERN’s SPS accelerator in a beam of 120 GeV protons. Details on the production and results of testbeam data are presented.

  1. A-3 steel work completed

    2009-01-01

    Stennis Space Center engineers celebrated a key milestone in construction of the A-3 Test Stand on April 9 - completion of structural steel work. Workers with Lafayette (La.) Steel Erector Inc. placed the last structural steel beam atop the stand during a noon ceremony attended by more than 100 workers and guests.

  2. Rates and mechanisms of optic contamination in the EUV engineering test stand

    Grunow, Philip A.; Klebanoff, Leonard E.; Graham, Samuel, Jr.; Haney, Steven J.; Clift, W. Miles

    2003-06-01

    The EUV Engineering Test Stand (ETS) is a full field, alpha class Extreme Ultraviolet Lithography (EUVL) tool that has demonstrated the printing of 70 nm resolution scanned images. The tool employs Mo/Si multilayer optics that reflect EUV radiation (13.4nm / 92.5eV) with ~67% peak reflectance per optic. For good reflectivity, many (greater than or equal to 40)Mo/Si layers must be present. Consequently, processes such as plasma induced multilayer erosion, which reduces the number of bilayer pairs on plasma facing optics, need to be understood. Since most materials readily absorb EUV photons, it is important to prevent contamination of mirror surfaces with EUV absorbing material. Contamination can occur by EUV photons "cracking" hydrocarbons or other species absorbed on the optical surfaces. The first ETS condenser component, referred to as C1, is coated with Mo/Si multilayers. Data collected from Mo/Si witness plates placed at the C1 position indicate erosion, using the Xe Laser Produced Plasma (LPP) spray jet, of 1 bilayer per ~15 million shots. Preliminary experiments with a filament jet yielded a significantly higher erosion rate. In the spray jet studies, erosion was found to depend sensitively on the composition of the residual background environment. Addition of low levels, ~7x10-7 Torr, of H2O to the vacuum background produced oxidation of the Si cap, and significantly slowed spray jet induced erosion. Operation of the plasma changed the environment in the Illuminator Chamber from oxidizing to carbonizing, thereby changing the nature of the contamination found environment at the C3 optic which does not view the plasma directly (and therefore does not erode). The change in environment is attributed to plasma induced outgassing of fluorocarbons in the Illuminator. Due to the non zero conductance between the Illuminator and Main Chambers, fluorocarbons were also found in the Main Chamber during Xe LPP operation. RGA data are presented that document the effect

  3. Rates and mechanisms of optic contamination in the EUVL engineering test stand

    Grunow, Philip A.; Klebanoff, Leonard E.; Graham, Samuel, Jr.; Haney, Steven J.; Clift, W. Miles

    2003-06-01

    The EUV Engineering Test Stand (ETS) is a full-field, alpha-class Extreme Ultraviolet Lithography (EUVL) tool that has demonstrated the printing of 70 nm resolution scanned images. The tool employs Mo/Si multilayer optics that reflect EUV radiation (13.4nm / 92.5eV) with ~67% peak reflectance per optic. For good reflectivity, many (≥40)Mo/Si layers must be present. Consequently, processes such as plasma-induced multilayer erosion, which reduces the number of bilayer pairs on plasma-facing optics, need to be understood. Since most materials readily absorb EUV photons, it is important to prevent contamination of mirror surfaces with EUV absorbing material. Contamination can occur by EUV photons "cracking" hydrocarbons or other species absorbed on the optical surfaces. The first ETS condenser component, referred to as C1, is coated with Mo/Si multilayers. Data collected from Mo/Si witness plates placed at the C1 position indicate erosion, using the Xe Laser Produced Plasma (LPP) spray jet, of 1 bilayer per ~15 million shots. Preliminary experiments with a filament jet yielded a significantly higher erosion rate. In the spray jet studies, erosion was found to depend sensitively on the composition of the residual background environment. Addition of low levels, ~7x10-7 Torr, of H2O to the vacuum background produced oxidation of the Si cap, and significantly slowed spray jet-induced erosion. Operation of the plasma changed the environment in the Illuminator Chamber from oxidizing to carbonizing, thereby changing the nature of the contamination found environment at the C3 optic which does not view the plasma directly (and therefore does not erode). The change in environment is attributed to plasma-induced outgassing of fluorocarbons in the Illuminator. Due to the non-zero conductance between the Illuminator and Main Chambers, fluorocarbons were also found in the Main Chamber during Xe LPP operation. RGA data are presented that document the effect. In the presence of such

  4. Foot Placement and Arm Position Affect the Five Times Sit-to-Stand Test Time of Individuals with Chronic Stroke

    2014-01-01

    Objectives. To investigate the effect of two foot placements (normal or posterior placement) and three arm positions (hands on the thighs, arms crossed over chest, and augmented arm position with elbow extended) on the five times sit-to-stand (FTSTS) test times of individuals with chronic stroke. Design. Cross-sectional study. Setting. University-based rehabilitation clinic. Participants. A convenience sample of community-dwelling individuals with chronic stroke (N = 45). Methods. The times i...

  5. Association of Seat Height and Arm Position on the Five Times Sit-to-Stand Test Times of Stroke Survivors

    Ng, Shamay S. M.; Susanna Y. Cheung; Lauren S. W. Lai; Liu, Ann S. L.; Selena H. I. Ieong; Fong, Shirley S.M.

    2013-01-01

    Objectives. To investigate (1) the association of seat height and (2) the association of arm position on the five times sit-to-stand test (FTSTS) times of individuals with stroke. Design. A cross-sectional study. Setting. University-based rehabilitation centre. Subjects. Patients (n = 43) with chronic stroke. Methods. The times in completing the FTSTS with different seat height (85%, 100%, and 115% knee height) and arm positions (arms across chest, hands on thighs). Results. FTSTS times were ...

  6. Effects of a standing and three dynamic workstations on computer task performance and cognitive function tests.

    Commissaris, Dianne A C M; Könemann, Reinier; Hiemstra-van Mastrigt, Suzanne; Burford, Eva-Maria; Botter, Juliane; Douwes, Marjolein; Ellegast, Rolf P

    2014-11-01

    Sedentary work entails health risks. Dynamic (or active) workstations, at which computer tasks can be combined with physical activity, may reduce the risks of sedentary behaviour. The aim of this study was to evaluate short term task performance while working on three dynamic workstations: a treadmill, an elliptical trainer, a bicycle ergometer and a conventional standing workstation. A standard sitting workstation served as control condition. Fifteen Dutch adults performed five standardised but common office tasks in an office-like laboratory setting. Both objective and perceived work performance were measured. With the exception of high precision mouse tasks, short term work performance was not affected by working on a dynamic or a standing workstation. The participant's perception of decreased performance might complicate the acceptance of dynamic workstations, although most participants indicate that they would use a dynamic workstation if available at the workplace. PMID:24951234

  7. Number of test trials needed for performance stability and interrater reliability of the one leg stand test in patients with a major non-traumatic lower limb amputation

    Kristensen, Morten Tange; Nielsen, Anni Østergaard; Madsen Topp, Ulla; Jakobsen, Berit; Nielsen, Kirsten Juel; Gybel Juul-Larsen, Helle; Jakobsen, Thomas Linding

    2014-01-01

    Balance is beneficial for daily functioning of patients with a lower limb amputation and sometimes assessed by the one-leg stand test (OLST). The aims of the study were to examine (1) the number of trials needed to achieve performance stability, (2) the interrater reliability of the OLST in...... patients with a major non-traumatic lower limb amputation, and (3) to provide a test procedure....

  8. The over 3 m long SV25 steel props at an experimental stand and in underground site testing

    Homel, J.; Labonski, S.; Kozlowski, A.

    1991-07-01

    Presents results of an experimental stand and underground tests of installing long SV25 props in over 3 m high workings. Bench tests showed the bearing capacity of 3.5-4.86 m high props to be 285 kN on average for the first stage up to the point of sliding in joints and 160 kN in the second phase after straightening of stirrups. Characteristics of bending tests are also presented. Field tests were conducted in the Moszczenica black coal mine with satisfactory results. The conclusion is reached that props with two stirrups should be used only as auxiliary support reinforcement while application of a third stirrup is recommended if they are used as basic support elements. Application of double-yoke stirrups is also recommended. 3 refs.

  9. Development of Test Stand for Torsional Fatigue Test of Vehicle Steering Shaft%汽车转向轴扭转疲劳试验台开发

    陈建国; 袁海兵

    2013-01-01

    为了检验转向轴的质量,设计了转向轴扭转疲劳试验台。介绍了试验台的机械结构,设计了以PIC芯片为控制器的硬件电路,阐述了软件的编制流程。该试验台可以保证加载的扭矩恒定,方便地显示加载次数。系统自动化程度高,运行稳定可靠。%In order to verify the quality of the steering shaft,a test stand is designed for the purpose of torsional fatigue test. In this paper the mechanical contracture is introduced, the hardware circuit based on PIC microcontroller is designed and the flowchart of the control software is drawn. The test stand can ensure constant torque load and display the experimental times conveniently. The system has high automotive degree and works stably and reliably,which shows that the design of the test stand is successful.

  10. Location of rut stands vs.mating opportunities in Przewalski's gazelle: A field test of the "Resource-based Hypothesis" and "Female Traffic Version of the Hotspot Hypothesis"

    Zhangqiang YOU; Zhigang JIANG; Chunwang LI

    2011-01-01

    We studied the mating tactics of Przewalski's gazelle on the Qinghal-Tibetan Plateau from 2002 to 2005.Przewalski's gazelle is a cluster mating animal whereby female groups,including juveniles,travel to and from their resting grounds along luted routes and dominant males stand on or near these travel routes during rut.To explain rut patterns in male gazelles,we tested predictions arising from the "Resource-based Hypothesis" and "Female Traffic Version of the Hotspot Hypothesis".We marked the location of each rut stand and female travel route,measured food availability in each rut stand and recorded the mating opportunities of rut stand owners.We also conducted a field experiment to force female groups to change their daily travel route,and observed whether males abandon their original rut stands and shift their rut stands to new travel routes of females during the 3rd rut.We found that:(1) male gazelle defending rut stands closer to a female travel route had a higher chance of mating; (2) food resources within rut stands had no effect on mating opportunities of the rut stand owner; (3) when the female travel route was obstructed,female groups changed grazing sites,and all males abandoned their original rut stands and defended new rut stands along the new female travel route.In conclusion,the location of rut stands in relation to female travel routes is the ultimate factor for consolidating mating opportunities in male gazelle,supporting the "Female Route Version of Hotspot Hypothesis"[Current Zoology 57 (6):701-708,2011].

  11. An analysis of cross-coupling of a multicomponent jet engine test stand using finite element modeling techniques

    Schweikhard, W. G.; Singnoi, W. N.

    1985-01-01

    A two axis thrust measuring system was analyzed by using a finite a element computer program to determine the sensitivities of the thrust vectoring nozzle system to misalignment of the load cells and applied loads, and the stiffness of the structural members. Three models were evaluated: (1) the basic measuring element and its internal calibration load cells; (2) the basic measuring element and its external load calibration equipment; and (3) the basic measuring element, external calibration load frame and the altitude facility support structure. Alignment of calibration loads was the greatest source of error for multiaxis thrust measuring systems. Uniform increases or decreases in stiffness of the members, which might be caused by the selection of the materials, have little effect on the accuracy of the measurements. It is found that the POLO-FINITE program is a viable tool for designing and analyzing multiaxis thrust measurement systems. The response of the test stand to step inputs that might be encountered with thrust vectoring tests was determined. The dynamic analysis show a potential problem for measuring the dynamic response characteristics of thrust vectoring systems because of the inherently light damping of the test stand.

  12. Testing prototypes of high-temperature superconducting current leads of cryogenic stand for testing magnetic elements of the NICA accelerating complex

    Kres, E. V.; Kadenko, I. N.; Bessheiko, O. A.; Belov, D. V.; Blinov, N. A.; Galimov, A. R.; Zorin, A. G.; Karpinsky, V. N.; Nikiforov, D. N.; Pivin, R. V.; Smirnov, A. V.; Shevchenko, E. V.; Smirnov, S. A.; Khodzhibagiyan, G. G.; Liu, Cheng Lian

    2014-09-01

    In the Laboratory of High Energies at the Joint Institute for Nuclear Research, as part of the NICA-MPD [1] project, tests of two prototypes of HTSC current leads prepared at ASIPP institute (Hefei, China) have been performed [2, 3] to measure electric and heat parameters and to search for structural and physical drawbacks. Based on the experimental results, necessary changes are made in the structure of HTSC current leads of the testing stand for the magnetic element testing of the NICA accelerating complex and its basic setups: the Nuclotron, Booster, and Collider.

  13. Creating an EPICS Based Test Stand Development System for a BPM Digitizer of the Linac Coherent Light Source

    The Linac Coherent Light Source (LCLS) is required to deliver a high quality electron beam for producing coherent X-rays. As a result, high resolution beam position monitoring is required. The Beam Position Monitor (BPM) digitizer acquires analog signals from the beam line and digitizes them to obtain beam position data. Although Matlab is currently being used to test the BPM digitizer?s functions and capability, the Controls Department at SLAC prefers to use Experimental Physics and Industrial Control Systems (EPICS). This paper discusses the transition of providing similar as well as enhanced functionalities, than those offered by Matlab, to test the digitizer. Altogether, the improved test stand development system can perform mathematical and statistical calculations with the waveform signals acquired from the digitizer and compute the fast Fourier transform (FFT) of the signals. Finally, logging of meaningful data into files has been added.

  14. Minutes of Proceedings and Evidence of the Standing Committee on External Affairs and International Trade Respecting: Pursuant to Standing Order 108(2), consideration of nuclear dumping and testing in the Russian Arctic

    The Standing Committee on External Affairs and International Trade met to consider the nuclear dumping and testing in the Russian Arctic. Canada is concerned about the environmental effects of the radioactive waste to the marine environment. The safe dismantlement of nuclear weapons or reactors is of major concern

  15. Validity and Reproducibility of an Incremental Sit-To-Stand Exercise Test for Evaluating Anaerobic Threshold in Young, Healthy Individuals

    Keisuke Nakamura, Masayoshi Ohira, Yoshiharu Yokokawa, Yuya Nagasawa

    2015-12-01

    Full Text Available Sit-to-stand exercise (STS is a common activity of daily living. The objectives of the present study were: 1 to assess the validity of aerobic fitness measurements based on anaerobic thresholds (ATs, during incremental sit-to-stand exercise (ISTS with and without arm support compared with an incremental cycle-ergometer (CE test; and 2 to examine the reproducibility of the AT measured during the ISTSs. Twenty-six healthy individuals randomly performed the ISTS and CE test. Oxygen uptakes at the AT (AT-VO2 and heart rate at the AT (AT-HR were determined during the ISTSs and CE test, and repeated-measures analyses of variance and Tukey’s post-hoc test were used to evaluate the differences between these variables. Pearson correlation coefficients were used to assess the strength of the relationship between AT-VO2 and AT-HR during the ISTSs and CE test. Data analysis yielded the following correlations: AT-VO2 during the ISTS with arm support and the CE test, r = 0.77 (p < 0.05; AT-VO2 during the ISTS without arm support and the CE test, r = 0.70 (p < 0.05; AT-HR during the ISTS with arm support and the CE test, r = 0.80 (p < 0.05; and AT-HR during the ISTS without arm support and the CE test, r = 0.66 (p < 0.05. The AT-VO2 values during the ISTS with arm support (18.5 ± 1.9 mL·min-1·kg-1 and the CE test (18.4 ± 1.8 mL·min-1·kg-1 were significantly higher than those during the ISTS without arm support (16.6 ± 1.8 mL·min-1·kg-1; p < 0.05. The AT-HR values during the ISTS with arm support (126 ± 10 bpm and the CE test (126 ± 13 bpm were significantly higher than those during the ISTS without arm support (119 ± 9 bpm; p < 0.05. The ISTS with arm support may provide a cardiopulmonary function load equivalent to the CE test; therefore, it is a potentially valid test for evaluating AT-VO2 and AT-HR in healthy, young adults.

  16. Preliminary performance results for the ATLAS RPC test stand in Lecce

    We present here a preliminary performance analysis of the ATLAS RPC tested at the Lecce cosmic ray testing facility. In this paper we define the operating working point for our detectors and show the distribution of the principal operating parameters

  17. Data acquisition system of the 972 MHz klystron test stand for J-PARC linac

    At the 972 MHz klystron test station, we have been performing the various high power tests for the LINAC energy upgrade plan since 2001. In this April, the 972 MHz klystron which improved output window and collector was installed in the test station. We constructed the LLRF control system and the data acquisition system at the klystron test station to measure the RF characteristics of this klystron. In this report, we outline this system and present some of experiment results. (author)

  18. Data acquisition system of 324 MHz klystron test stand at J-PARC LINAC

    The J-PARC (Japan Proton Accelerator Research Complex) Linac consists of RFQ, DTL1-3 and SDTL1-15. They are driven by 324 MHz klystrons. We measured RF characteristics of 24 klystrons, and obtained various parameters by klystron high power tests at test stations. In this paper, we report the data acquisition system used by this high power tests. (author)

  19. Design of a test stand for measuring processes in a liquid helium vessel upon failure of the insulating vacuum

    Loss of the insulating vacuum is in many cases considered as the greatest conceivable failure in designing safety devices for liquid helium vessels. Proper dimensioning is of critical importance due to the extreme operating conditions (low temperatures, low enthalpy of evaporation of liquid helium). In many cases the existing technical codes (e.g. AD-2000, DIN) do not sufficiently cover the range of conditions that can occur in cryogenic engineering. In the past, the design of safety devices has usually been based on experience or a very limited selection of experimental data. However these often provide insufficient information on the processes taking place. This paper describes the planning and the measurement principle of a test stand for safety devices. The purpose of the test stand is to validate a preexisting theoretical model of the processes in question and, in particular, to analyse the influence of superinsulation on the heat flux to the helium as well as the processes taking place inside the helium vessel.

  20. INTRODUCING NOVEL GENERATION OF HIGH ACCURACY CAMERA OPTICAL-TESTING AND CALIBRATION TEST-STANDS FEASIBLE FOR SERIES PRODUCTION OF CAMERAS

    M. Nekouei Shahraki

    2015-12-01

    Full Text Available The recent advances in the field of computer-vision have opened the doors of many opportunities for taking advantage of these techniques and technologies in many fields and applications. Having a high demand for these systems in today and future vehicles implies a high production volume of video cameras. The above criterions imply that it is critical to design test systems which deliver fast and accurate calibration and optical-testing capabilities. In this paper we introduce new generation of test-stands delivering high calibration quality in single-shot calibration of fisheye surround-view cameras. This incorporates important geometric features from bundle-block calibration, delivers very high (sub-pixel calibration accuracy, makes possible a very fast calibration procedure (few seconds, and realizes autonomous calibration via machines. We have used the geometrical shape of a Spherical Helix (Type: 3D Spherical Spiral with special geometrical characteristics, having a uniform radius which corresponds to the uniform motion. This geometrical feature was mechanically realized using three dimensional truncated icosahedrons which practically allow the implementation of a spherical helix on multiple surfaces. Furthermore the test-stand enables us to perform many other important optical tests such as stray-light testing, enabling us to evaluate the certain qualities of the camera optical module.

  1. Last Stand-alone Beam Test of the Hadronic End-cap Calorimeter (HEC) Finished.

    Oberlack, H

    One quarter of all 134 HEC modules are tested with electron, pion and muon beams: two "partial HEC wheels", three HEC1 modules and three HEC2 modules, are used in a standard setup using the HEC cryostat in the H6 beam line. The picture shows a view of the set-up in the cryostat during the installation. MC results show that in this setup the energy leakage is well under control - well below 5 %. In addition, the other three quarters of modules are tested in technical cold tests. Using calibration signals, a detailed test of the cabling, cold electronics, crosstalk and noise performance is being done. The beam tests started with four prototype modules per run in '97, when technological optimization was still the key issue. From '98 onwards, modules of the "module 0" type have been tested, typically in two run periods per year. Finally in '99 the series production has started, with first beam test of series modules in 2000. Since then 57 series modules have been cold tested, 24 of them actually in beam tests. T...

  2. Integrated Component and System Analyses of Instabilities in Test Stands Project

    National Aeronautics and Space Administration — Instabilities associated with the operation of liquid rocket propulsion systems and test facilities usually manifest themselves as structural vibrations and may...

  3. Integrated Component and System Analyses of Instabilities in Test Stands Project

    National Aeronautics and Space Administration — Instabilities associated with fluid handling and operation in liquid rocket propulsion systems and test facilities usually manifest themselves as structural...

  4. Design, installation, commissioning and operation of a beamlet monitor in the negative ion beam test stand at NIFS

    Antoni, V.; Agostinetti, P.; Brombin, M.; Cervaro, V.; Delogu, R.; De Muri, M.; Fasolo, D.; Franchin, L.; Ghiraldelli, R.; Ikeda, K.; Kisaki, M.; Molon, F.; Muraro, A.; Nakano, H.; Pasqualotto, R.; Serianni, G.; Takeiri, Y.; Tollin, M.; Tsumori, K.; Veltri, P.

    2015-04-01

    In the framework of the accompanying activity for the development of the two neutral beam injectors for the ITER fusion experiment, an instrumented beam calorimeter is being designed at Consorzio RFX, to be used in the SPIDER test facility (particle energy 100keV; beam current 50A), with the aim of testing beam characteristics and to verify the source proper operation. The main components of the instrumented calorimeter are one-directional carbon-fibre-carbon composite tiles. Some prototype tiles have been used as a small-scale version of the entire calorimeter in the test stand of the neutral beam injectors of the LHD experiment, with the aim of characterising the beam features in various operating conditions. The extraction system of the NIFS test stand source was modified, by applying a mask to the first gridded electrode, in order to isolate only a subset of the beamlets, arranged in two 3×5 matrices, resembling the beamlet groups of the ITER beam sources. The present contribution gives a description of the design of the diagnostic system, including the numerical simulations of the expected thermal pattern. Moreover the dedicated thermocouple measurement system is presented. The beamlet monitor was successfully used for a full experimental campaign, during which the main parameters of the source, mainly the arc power and the grid voltages, were varied. This contribution describes the methods of fitting and data analysis applied to the infrared images of the camera to recover the beamlet optics characteristics, in order to quantify the response of the system to different operational conditions. Some results concerning the beamlet features are presented as a function of the source parameters.

  5. Design, installation, commissioning and operation of a beamlet monitor in the negative ion beam test stand at NIFS

    In the framework of the accompanying activity for the development of the two neutral beam injectors for the ITER fusion experiment, an instrumented beam calorimeter is being designed at Consorzio RFX, to be used in the SPIDER test facility (particle energy 100keV; beam current 50A), with the aim of testing beam characteristics and to verify the source proper operation. The main components of the instrumented calorimeter are one-directional carbon-fibre-carbon composite tiles. Some prototype tiles have been used as a small-scale version of the entire calorimeter in the test stand of the neutral beam injectors of the LHD experiment, with the aim of characterising the beam features in various operating conditions. The extraction system of the NIFS test stand source was modified, by applying a mask to the first gridded electrode, in order to isolate only a subset of the beamlets, arranged in two 3×5 matrices, resembling the beamlet groups of the ITER beam sources. The present contribution gives a description of the design of the diagnostic system, including the numerical simulations of the expected thermal pattern. Moreover the dedicated thermocouple measurement system is presented. The beamlet monitor was successfully used for a full experimental campaign, during which the main parameters of the source, mainly the arc power and the grid voltages, were varied. This contribution describes the methods of fitting and data analysis applied to the infrared images of the camera to recover the beamlet optics characteristics, in order to quantify the response of the system to different operational conditions. Some results concerning the beamlet features are presented as a function of the source parameters

  6. Design and fabrication of a micron scale free-standing specimen for uniaxial micro-tensile tests

    This paper presents a novel design and fabrication of test chips with a nickel free-standing specimen for the micro uniaxial tensile test. To fabricate test chips on the quartz substrate significantly reduces the fabrication time, minimizes the number of steps and eliminates the effect of the wet anisotropic etching process on mechanical properties. The test chip can be gripped tightly to the test machine and aligned accurately in the pulling direction; furthermore, the approximately straight design of the specimen rather than the traditional dog-bone structure enables the strain be directly measured by a displacement sensor. Both finite-element method (FEM) analysis and experimental results indicate the reliability of the new design. The test chip can also be extended to other materials. The experimental measured Young's modulus of a thin nickel film and the ultimate tensile strength are approximately 94.5 Gpa and 1.76 Gpa, respectively. The results were substantially supported by the experiment on larger gauge specimens by a commercial dynamic mechanical analysis (DMA) instrument. These specimens were electroplated under the same conditions. The low Young's modulus and the high ultimate tensile strength might be explained by the fine grain in the electroplated structure

  7. Beam measurements of the ANL-APS linac injector test stand

    The Argonne Advanced Photon Source (APS) injection S-band linac consists of a thermionic gun, a single gap prebuncher, a constant impedance buncher with υp = 0.75 c and a 3-meter long constant gradient traveling waveguide. Results of the electron beam measurements at 56 MeV and comparison with calculations and beam simulations are presented. (author). 3 tabs., 3 figs

  8. IKAR on-line testing stand for investigation of X-ray optics and radiation detectors in the 0.5-120 nm spectrum range

    The IKAR vacuum testing stand is intended for calibration and investigation of X-ray optics and radiation detector radiation. The stand is equipped with a set of radiation sources, filters and monochromators on the basis of transparent and reflecting lattices, radiation receivers of various types. The facility operates on-line with SM-3 computer through the CAMAC interface and is provided with actuating mechanisms and software, necessary for controlling experiments

  9. Completion of Flow Interruption Capability Test Stand for Functional Qualification Test of Valves Used in Nuclear Power Plant

    CHENG; Dao-xi; QI; Xiao-guang; ZHAI; Wei-ming; YANG; Bing; ZHOU; Ping

    2013-01-01

    The flow interruption capability test of valve is used for researching the capability of the valves used in nuclear power plants emergently shut off the flow,when the reactor loop is in emergency situations,especially in the design basis accident conditions.This test is one of the most difficult tests in the functional

  10. Development of 20 kW input power coupler for 1.3 GHz ERL main linac. Component test at 30 kW IOT test stand

    We started to develop an input coupler for a 1.3 GHz ERL superconducting cavity. Required input power is about 20 kW for the cavity acceleration field of 20 MV/m and the beam current of 100 mA in energy recovery operation. The input coupler is designed based on the STF-BL input coupler and some modifications are applied to the design for the CW 20 kW power operation. We fabricated input coupler components such as ceramic windows and bellows and carried out the high-power test of the components by using a 30 kW IOT power source and a test stand constructed for the highpower test. In this report, we mainly describe the results of the high-power test of ceramic window and bellows. (author)

  11. RF and Data Acquisition Systems for Fermilab's ILC SRF Cavity Vertical Test Stand

    Fermilab is developing a facility for vertical testing of SRF cavities as part of a program to improve cavity performance reproducibility for the ILC. The RF system for this facility, using the classic combination of oscillator, phase detector/mixer, and loop amplifier to detect the resonant cavity frequency and lock onto the cavity, is based on the proven production cavity test systems used at Jefferson Lab for CEBAF and SNS cavity testing. The design approach is modular in nature, using commercial-off-the-shelf (COTS) components. This yields a system that can be easily debugged and modified, and with ready availability of spares. Data acquisition and control is provided by a PXI-based hardware platform in conjunction with software developed in the LabView programming environment. This software provides for amplitude and phase adjustment of incident RF power, and measures all relevant cavity power levels, cavity thermal environment parameters, as well as field emission-produced radiation. It also calculates the various cavity performance parameters and their associated errors. Performance during system commissioning and initial cavity tests will be presented

  12. Progress of the Hard-wired Instrumentation and Control Works for the Neutral Beam Test Stand at KAERI

    Progress of the hard-wired instrumentation and control works for the neutral beam test stand(NB-TS) has been existed for the past one year period. Details of the installed arc detector circuit are explained. LN2 level and temperature control during the cryosorption pumping operation are explained with an emphasis on its control circuit. With an expectation of more accurate and sensitive measurement of temperatures than the thermocouple utilization during the calorimeter operation, PT-100 resistance temperature detector(RTD) utilization is initiated and the results are described. During the ion beam experiment, physical measurements are made with some delayed time than the beam extraction, and thus a delayed trigger pulse generator was fabricated and installed to the system. Underlying principles of the electronic circuits for the interlock implementation and optical signal transmission are introduced. These are basically the application of operational amplifier circuits. A cautious aspect of the SMPS(switch mode power supply) utilization is also give

  13. Load optimal design for a primary test stand facility based on a zero-dimensional load model

    In order to couple the numerical simulation of a primary test stand driver with an optimal load design, a zero-dimensional wire array load model is designed based on the Saturn load model using PSPICE, which is an upgraded version of the Simulation Program with Integrated Circuit Emphasis (SPICE) designed by the ORCAD Corporation to perform circuit simulations. This paper calculates different load parameters and discusses factors influencing the driving current curve. With appropriate driving current curves chosen, further magneto-hydrodynamic calculations are carried out and discussed to provide the best results for experiments. The suggested optimal load parameters play an important role in experimental load design. (physics of gases, plasmas, and electric discharges)

  14. Sensitivity and alternative operating point studies on a high charge CW FEL injector test stand at CEBAF

    A high charge CW FEL injector test stand is being built at CEBAF based on a 500 kV DC laser gun, a 1500 MHz room-temperature buncher, and a high-gradient (∼10 MV/m) CEBAF cryounit containing two 1500 MHz CEBAF SRF cavities. Space-charge-dominated beam dynamics simulations show that this injector should be an excellent high-brightness electron beam source for CW UV FELs if the nominal parameters assigned to each component of the system are experimentally achieved. Extensive sensitivity and alternative operating point studies have been conducted numerically to establish tolerances on the parameters of various injector system components. The consequences of degraded injector performance, due to failure to establish and/or maintain the nominal system design parameters, on the performance of the main accelerator and the FEL itself are discussed

  15. Networked remote control and data acquisition on the Mantis test stand

    Low level neutron radiation generated by long pulse deuterium experiments on the MANTIS test bed requires that the experiment be monitored and controlled from a location outside of the control room. Consequently, a flexible and low cost data acquisition system has been developed using public domain technologies of the Internet. A virtual console to the MANTIS experiment can be located anywhere in the world. (author)

  16. Developing A New Test Stand For Lifetime Measurements Using A Narrow Gap Detector

    Tuitt, Omani; Hill, Joanne E.; Jahoda, Keith; Morris, David C.

    2016-01-01

    The University of the Virgin Islands (UVI) recently won a proposal "The First Four-Year Physics and Astronomy Degree at the University of the Virgin Islands; A new Era in Caribbean Participation in NASA Science" in collaboration with NASA Goddard Space Flight Center (GSFC). The proposal included building a detector life-test chamber at UVI to support the degree program as well as assist NASA by running tests on detector components and reporting the results.The team at GSFC is developing X-ray polarimeters that can be used in detecting and imaging astrophysical sources such as black holes and neutron stars. The purpose of our research is to understand the effects that the degradation of gas has on the performance of the detectors. The current generation of time projection polarimeter incorporates a narrow gap detector assembled with epoxy. The addition of the epoxy allows a smaller gap with the minimal amount of changes from the original design, enhancing the performance of the detectors.With the use of epoxy, lifetime measurements have to be made to see how the epoxy detectors compared to previous iterations. We have been studying the effects on the narrow gap detector in the Mahaffey chamber in order to determine whether the epoxy affects the cleanliness of the gas. Tests have been conducted with a residual gas analyzer (RGA) in order to monitor the cleanliness of the gas inside of the Mahaffey chamber while being baked out. Results show that the detector is in fact getting cleaner as time progresses. The plan is to recreate a detector that meets the performance criteria for 2 years and has minimal degradation.

  17. Design Parameters of the Normal Conducting Booster Cavity for the PITZ-2 Test Stand

    Paramonov, V V; Kvasha, A I; Menshov, A; Pronin, O D; Skasyrskaya, A; Stepanov, A A

    2004-01-01

    The normal conducting booster cavity is intended to increase the electron bunch energy in the Photo Injector Test (DESY, Zeuthen) stage 2 experiments. The normal conducting cavity is selected due to infrastructure particularities. The L-band cavity is designed to provide the accelerating gradient up to 14 MV/m with the total input RF power 8.6 MW, RF pulse length up to 900 mks and repetition rate 5 Hz. The multi-cell cavity is based on the CDS compensated accelerating structure with the improved coupling coefficient value. The main design ideas and decisions are described briefly together with cavity parameters - RF properties, cooling and pumping circuits.

  18. Radio frequency induction plasma generator 80-kV test stand operation

    Beam extraction tests at energies up to 80 kV were performed using a radio frequency induction (RFI) plasma generator hydrogen ion source. A 7 x 10-cm2, long pulse accelerator was operated with a 10 x 10-cm2 axial magnetic cusp bucket and a magnetic-filter bucket. Atomic fractions (up to 85% H+), plasma production efficiencies (roughly-equal0.6 A of beam per kW rf power), and beam divergence were at least as good as with arc plasmas in similar chambers. Potential advantages of the RFI plasma sources for large-scale applications are ease of operation, reliability, and extended service life

  19. Status of High Power Tests of Normal Conducting Single-Cell Standing Wave Structures

    Our experiments are directed toward the understanding of the physics of rf breakdown in systems that can be used to accelerate electron beams at ∼11.4 GHz. The structure geometries have apertures, stored energy per cell, and rf pulse duration close to that of the NLC or CLIC. The breakdown rate is the main parameter that we use to compare rf breakdown behavior for different structures at a given set of rf pulse parameters (pulse shape and peak power) at 60 Hz repetition rate. In our experiments, the typical range of the breakdown rate is from one per few hours to ∼100 per hour. To date we have tested 29 structures. We consistently found that after the initial conditioning, the behavior of the breakdown rate is reproducible for structures of the same geometry and material, and the breakdown rate dependence on peak magnetic fields is stronger than on peak surface electric fields for structures of different geometries. Below we report the main results from tests of seven structures made from hard copper, soft copper alloys and hard-copper alloys. Additional details on these and other structures will be discussed in future publications.

  20. Start-up of low-background test stand LArGe for GERDA at LNGS

    LArGe is a test facility for Phase II of the GERDA experiment. The goal of GERDA is the search for neutrinoless double beta decay of Ge-76 with a considerable reduction of background in comparison with predecessor experiments. GERDA will operate bare germanium semiconductor detectors (enriched in Ge-76) submerged in high purity liquid argon supplemented by a water shield. LArGe puts into practice the novel concept to use LAr scintillation light as anti-coincidence signal for further background suppression. In the pilot setup Mini-LArGe about 95% of the background Compton events in the Ge detector were vetoed using 19 kg of LAr as active volume. Pulse shape analysis methods were developed, which allow to perform gamma/alpha/neutron selection with a strong discrimination factor (>105) for diagnostics. LArGe intends to realize these powerful tools on a larger scale using 1.4 tons of LAr as active volume in a copper cryostat surrounded by a graded low-level shielding. This talk gives an account of the start-up phase of this setup, which is currently ongoing in the Gran Sasso underground laboratory (Italy).

  1. Standing of nucleic acid testing strategies in veterinary diagnosis laboratories to uncover Mycobacterium tuberculosis complex members.

    Costa, Pedro; Botelho, Ana; Couto, Isabel; Viveiros, Miguel; Inácio, João

    2014-01-01

    Nucleic acid testing (NAT) designate any molecular approach used for the detection, identification, and characterization of pathogenic microorganisms, enabling the rapid, specific, and sensitive diagnostic of infectious diseases, such as tuberculosis. These assays have been widely used since the 90s of the last century in human clinical laboratories and, subsequently, also in veterinary diagnostics. Most NAT strategies are based in the polymerase chain reaction (PCR) and its several enhancements and variations. From the conventional PCR, real-time PCR and its combinations, isothermal DNA amplification, to the nanotechnologies, here we review how the NAT assays have been applied to decipher if and which member of the Mycobacterium tuberculosis complex is present in a clinical sample. Recent advances in DNA sequencing also brought new challenges and have made possible to generate rapidly and at a low cost, large amounts of sequence data. This revolution with the high-throughput sequencing (HTS) technologies makes whole genome sequencing (WGS) and metagenomics the trendiest NAT strategies, today. The ranking of NAT techniques in the field of clinical diagnostics is rising, and we provide a SWOT (Strengths, Weaknesses, Opportunities, and Threats) analysis with our view of the use of molecular diagnostics for detecting tuberculosis in veterinary laboratories, notwithstanding the gold standard being still the classical culture of the agent. The complementary use of both classical and molecular diagnostics approaches is recommended to speed the diagnostic, enabling a fast decision by competent authorities and rapid tackling of the disease. PMID:25988157

  2. Where the world stands still: turnaround as a strong test of ΛCDM cosmology

    Our intuitive understanding of cosmic structure formation works best in scales small enough so that isolated, bound, relaxed gravitating systems are no longer adjusting their radius; and large enough so that space and matter follow the average expansion of the Universe. Yet one of the most robust predictions of ΛCDM cosmology concerns the scale that separates these limits: the turnaround radius, which is the non-expanding shell furthest away from the center of a bound structure. We show that the maximum possible value of the turnaround radius within the framework of the ΛCDM model is, for a given mass M, equal to (3GM/Λ c2)1/3, with G Newton's constant and c the speed of light, independently of cosmic epoch, exact nature of dark matter, or baryonic effects. We discuss the possible use of this prediction as an observational test for ΛCDM cosmology. Current data appear to favor ΛCDM over alternatives with local inhomogeneities and no Λ. However there exist several local-universe structures that have, within errors, reached their limiting size. With improved determinations of their turnaround radii and the enclosed mass, these objects may challenge the limit and ΛCDM cosmology

  3. Intra-observer and interobserver reliability ofOne Leg Stand Test as a measure of posturalbalance in low back pain patients

    Maribo, Thomas; Iversen, Elena; Andersen, Niels Trolle; Stengaard-Pedersen, Kristian; Schøittz-Christensen, Berit

    2009-01-01

    Objective: To determine the absolute and relative reliability of intra-observer and interobserver To determine the absolute and relative reliability of intra-observer and interobserver measurements of postural balance using the One Leg Stand Test in patients with low back pain. Patients and metho...... balance in patients with chronic The One Leg Stand Test can be used to test postural balance in patients with chronic low back pain, as the reliability of the test was acceptable.......Objective: To determine the absolute and relative reliability of intra-observer and interobserver To determine the absolute and relative reliability of intra-observer and interobserver measurements of postural balance using the One Leg Stand Test in patients with low back pain. Patients and methods......: Forty-eight patients with chronic low back pain advised to do exercise were : Forty-eight patients with chronic low back pain advised to do exercise were included. A test protocol was established based on review of the literature and a pilot test. Patients were timed for their ability to stand on one...

  4. Progress of the Hard-wired Instrumentation and Control Works for the Neutral Beam Test Stand at KAERI

    Jung, Ki Sok

    2005-12-15

    Progress of the hard-wired instrumentation and control works for the neutral beam test stand(NB-TS) has been existed for the past one year period. Details of the installed arc detector circuit are explained. LN{sub 2} level and temperature control during the cryosorption pumping operation are explained with an emphasis on its control circuit. With an expectation of more accurate and sensitive measurement of temperatures than the thermocouple utilization during the calorimeter operation, PT-100 resistance temperature detector(RTD) utilization is initiated and the results are described. During the ion beam experiment, physical measurements are made with some delayed time than the beam extraction, and thus a delayed trigger pulse generator was fabricated and installed to the system. Underlying principles of the electronic circuits for the interlock implementation and optical signal transmission are introduced. These are basically the application of operational amplifier circuits. A cautious aspect of the SMPS(switch mode power supply) utilization is also give.

  5. Transverse profile expansion and homogenization at target for the injector Scheme- I test stand of China-ADS

    Yang, Zheng; Tang, Jing-Yu; Yan, Fang; Pei, Shi-Lun; Chen, Yuan; Li, Zhi-Hui; Geng, Hui-Ping

    2015-02-01

    For the injector Scheme- I test stand of the China-ADS (Accelerator Driven subcritical System), a beam with the maximum power of 100 kW will be produced and transported to the beam dump. To solve the very high thermal load problem at the dump, two measures are taken to deal with the huge power density at the target. One is to enlarge the contact area between the beam and the target, and this is to be accomplished by expanding the beam profile at the target and using slanted target plates. The other is to produce a more homogenous beam profile at the target to minimize the maximum power density. Here the beam dump line is designed to meet the requirement of beam expansion and homogenization at 3 different energies (3.2 MeV, 5 MeV and 10 MeV), and the step-like field magnets are employed for the beam spot homogenization. Taking into account the fact that the space charge effects are very strong at such low beam energies, the simulations have included space charge effects and errors which show that the beam line can meet the requirements very well. In the meantime, the alternative beam design using standard multipole magnets is also presented. Supported by CAS Strategic Priority Research Program- China-ADS and National Natural Science Foundation of China (11235012, 10975150)

  6. Measuring the ion energy distribution using a retarding field energy analyzer in a plasma material interaction test stand

    Christenson, Michael; Jung, Soonwook; Andruczyk, Daniel; Curreli, Davide; Ruzic, David

    2013-10-01

    The Divertor Erosion and Vapor Shielding eXperiment (DEVeX) at the University of Illinois is a gas-puff driven, theta pinch plasma source that is used as a test stand for off-normal plasma events incident on materials in the edge and divertor regions of a tokamak. Ion temperatures and the resulting energy distribution are of vital importance in DEVeX, indicating the level of edge simulation. For this reason, a theta pinch has been applied as a source of external heating, along with a coaxial plasma accelerator as a pre-ionization source. In its most recent iteration, the accurate diagnosis of ion temperature will prove difficult using conventional methods, since diagnostics are difficult in a pulsed device for measuring the ion temperature range produced in DEVeX (~10-100 eV). A retarding field energy analyzer (RFEA) has been proposed to measure the ion energy distribution and will be compared to theoretical predictions for the ion temperature in the upgraded DEVeX system. Such a diagnostic tool would be less susceptible to external fields and would be suitable for ion temperatures on the order of 100 eV. The RFEA will serve as a diagnostic for the ThermoElectric-driven Liquid-metal plasma-facing Structures (TELS), and its further applications are discussed. In residence at Princeton Plasma Physics Laboratory.

  7. Allometric Scaling and Resource Limitations Model of Total Aboveground Biomass in Forest Stands: Site-scale Test of Model

    CHOI, S.; Shi, Y.; Ni, X.; Simard, M.; Myneni, R. B.

    2013-12-01

    Sparseness in in-situ observations has precluded the spatially explicit and accurate mapping of forest biomass. The need for large-scale maps has raised various approaches implementing conjugations between forest biomass and geospatial predictors such as climate, forest type, soil property, and topography. Despite the improved modeling techniques (e.g., machine learning and spatial statistics), a common limitation is that biophysical mechanisms governing tree growth are neglected in these black-box type models. The absence of a priori knowledge may lead to false interpretation of modeled results or unexplainable shifts in outputs due to the inconsistent training samples or study sites. Here, we present a gray-box approach combining known biophysical processes and geospatial predictors through parametric optimizations (inversion of reference measures). Total aboveground biomass in forest stands is estimated by incorporating the Forest Inventory and Analysis (FIA) and Parameter-elevation Regressions on Independent Slopes Model (PRISM). Two main premises of this research are: (a) The Allometric Scaling and Resource Limitations (ASRL) theory can provide a relationship between tree geometry and local resource availability constrained by environmental conditions; and (b) The zeroth order theory (size-frequency distribution) can expand individual tree allometry into total aboveground biomass at the forest stand level. In addition to the FIA estimates, two reference maps from the National Biomass and Carbon Dataset (NBCD) and U.S. Forest Service (USFS) were produced to evaluate the model. This research focuses on a site-scale test of the biomass model to explore the robustness of predictors, and to potentially improve models using additional geospatial predictors such as climatic variables, vegetation indices, soil properties, and lidar-/radar-derived altimetry products (or existing forest canopy height maps). As results, the optimized ASRL estimates satisfactorily

  8. X-band rf power production and deceleration in the two-beam test stand of the Compact Linear Collider test facility

    Adli, E; Dubrovskiy, A; Syratchev, I; Ruber, R; Ziemann, V

    2011-01-01

    We discuss X-band rf power production and deceleration in the two-beam test stand of the CLIC test facility at CERN. The rf power is extracted from an electron drive beam by a specially designed power extraction structure. In order to test the structures at high-power levels, part of the generated power is recirculated to an input port, thus allowing for increased deceleration and power levels within the structure. The degree of recirculation is controlled by a splitter and phase shifter. We present a model that describes the system and validate it with measurements over a wide range of parameters. Moreover, by correlating rf power measurements with the energy lost by the electron beam, as measured in a spectrometer placed after the power extraction structure, we are able to identify system parameters, including the form factor of the electron beam. The quality of the agreement between model and reality gives us confidence to extrapolate the results found in the present test facility towards the parameter reg...

  9. An evaluation of the 30-s chair stand test in older adults: frailty detection based on kinematic parameters from a single inertial unit

    Millor, Nora; Lecumberri, Pablo; Gómez, Marisol; Martínez-Ramírez, Alicia; Izquierdo, Mikel

    2013-01-01

    Background A growing interest in frailty syndrome exists because it is regarded as a major predictor of co-morbidities and mortality in older populations. Nevertheless, frailty assessment has been controversial, particularly when identifying this syndrome in a community setting. Performance tests such as the 30-second chair stand test (30-s CST) are a cornerstone for detecting early declines in functional independence. Additionally, recent advances in body-fixed sensors have enhanced the sens...

  10. Standing out

    Ruiz Muñoz De León, Jose Manuel

    2014-01-01

    Standing Out is a documentary about sports commonly called urbans. Many of these were born in the street, some by necessity and others for fun. As these sports have grown and have won a lot of follower the last years, have begun to appear some competitions. But it is a competition to what an athlete should aspire? Many followers of these sports have continued to believe that the most important thing is to enjoy. the sport without other purpose than to fun. Standing Out is a documentary abo...

  11. A 3D Laboratory Test-platform for Overhead Power Line Inspection

    Liu, Chang-An; Dong, Ruifang; Wu, Hua; Yang, Guo-tian; Lin, Wei

    2016-01-01

    Using unmanned aerial vehicles (UAVs) for performing automatic inspection of overhead power lines instead of foot patrols is an attractive option, since doing so is safer and have considerable cost savings, among other advantages. The purpose of this paper is to design a 3D laboratory test-platform to simulate UAVs' inspection of transmission lines and secondly, proposing an automated inspection strategy for UAVs in order to follow transmission lines. The construction and system architecture ...

  12. A-3 First Tree Cutting

    2007-01-01

    Tree clearing for the site of the new A-3 Test Stand at Stennis Space center began June 13. NASA's first new large rocket engine test stand to be built since the site's inception, A-3 construction begins a historic era for America's largest rocket engine test complex. The 300-foot-tall structure is scheduled for completion in August 2010. A-3 will perform altitude tests on the Constellation's J-2X engine that will power the upper stage of the Ares I crew launch vehicle and earth departure stage of the Ares V cargo launch vehicle. The Constellation Program, NASA's plan for carrying out the nation's Vision for Space Exploration, will return humans to the moon and eventually carry them to Mars and beyond.

  13. Developments in Test Facility and Data Networking for the Altitude Test Stand at the John C. Stennis Space Center, MS - A General Overview

    Hebert, Phillip W., Sr.

    2008-01-01

    May 2007, NASA's Constellation Program selected John C Stennis Space Center (SSC) near Waveland Mississippi as the site to construct an altitude test facility for the developmental and qualification testing of the Ares1 upper stage (US) engine. Test requirements born out of the Ares1 US propulsion system design necessitate exceptional Data Acquisition System (DAS) design solutions that support facility and propellant systems conditioning, test operations control and test data analysis. This paper reviews the new A3 Altitude Test Facility's DAS design requirements for real-time deterministic digital data, DAS technology enhancements, system trades, technology validation activities, and the current status of this system's new architecture. Also to be discussed will be current network technologies to improve data transfer.

  14. Corrective Action Investigation Plan for Corrective Action Unit 252: Area 25 Engine Test Stand 1 Decontamination Pad, Nevada Test Site, Nevada

    This Corrective Action Investigation Plan contains the U.S. Department of Energy, Nevada Operations Office's approach to collect the data necessary to evaluate corrective action alternatives appropriate for the closure of Corrective Action Unit 252 under the Federal Facility Agreement and Consent Order. Corrective Action Unit 252 consists of Corrective Action Site (CAS) 25-07-02, Engine Test Stand-1 (ETS-1) Decontamination Pad. Located in Area 25 at the intersection of Road H and Road K at the Nevada Test Site, ETS-1 was designed for use as a mobile radiation checkpoint and for vehicle decontamination. The CAS consists of a concrete decontamination pad with a drain, a gravel-filled sump, two concrete trailer pads, and utility boxes. Constructed in 1966, the ETS-1 facility was part of the Nuclear Rocket Development Station (NRDS) complex and used to test nuclear rockets. The ETS-1 Decontamination Pad and mobile radiation check point was built in 1968. The NRDS complex ceased primary operations in 1973. Based on site history, the focus of the field investigation activities will be to determine if any primary contaminants of potential concern (COPCs) (including radionuclides, total volatile organic compounds, total semivolatile organic compounds, total petroleum hydrocarbons as diesel-range organics, Resource Conservation and Recovery Act metals, total pesticides, and polychlorinated biphenyls) are present at this site. Vertical extent of migration of suspected vehicle decontamination effluent COPCs is expected to be less than 12 feet below ground surface. Lateral extent of migration of COPCs is expected to be limited to the sump area or near the northeast corner of the decontamination pad. Using a biased sampling approach, near-surface and subsurface sampling will be conducted at the suspected worst-case areas including the sump and soil near the northeast corner of the decontamination pad. The results of this field investigation will support a defensible e valuation

  15. Study of a static rocket test stand system for setting the performances of a rocket engine fed with oxygen and methane in gaseous phase

    Ferrer González, Carlos

    2010-01-01

    According to the concept of a fluid-bipropellant rocket engine proposed in Design of a rocket engine fed with oxygen and methane in gaseous phase for educational purposes [TR01], a preliminary test stand design for the prediction and validation of the main performances of this engine has been developed. The main sensors and transducers are selected to measure the stated performances. After the proposed instrumentation, a virtual panel control has been also carried out.

  16. A 3D Laboratory Test-platform for Overhead Power Line Inspection

    Chang-an Liu

    2016-04-01

    Full Text Available Using unmanned aerial vehicles (UAVs for performing automatic inspection of overhead power lines instead of foot patrols is an attractive option, since doing so is safer and have considerable cost savings, among other advantages. The purpose of this paper is to design a 3D laboratory test-platform to simulate UAVs' inspection of transmission lines and secondly, proposing an automated inspection strategy for UAVs in order to follow transmission lines. The construction and system architecture of our 3D test-platform is described in this paper. The inspection strategy contributes to knowledge pertaining to an automated inspection procedure and includes two steps: flight path planning for UAVs and visual tracking of the transmission lines. The 3D laboratory test-platform is applied to test the performance of the proposed strategy and the tracking results of our inspection strategy are subsequently presented. The availability of the 3D laboratory test-platform and the efficiency of our tracking algorithm are verified by experiments.

  17. Optical Tests of a 3.7-m diameter Liquid Mirror Behavior under External Perturbations

    Tremblay, G; Tremblay, Gregoire; Borra, Ermanno F.

    2000-01-01

    We have built and tested a 3.7-m diameter liquid mirror that rotates on a ball bearing. We have carried out extensive optical tests. We find that although the ball bearing has a poor quality, the quality of the mirror, with mercury layers 1-mm thick, is surprisingly good. Taken at face values the instantaneous Strehl ratios indicate a mirror, that is not quite diffraction limited but usable for astronomical applications. However, the large coning error of the bearing (1.5 arcseconds P-V) induces an excessive wobble, considerably worsening the time averaged PSF. The most interesting result of the interferometry is that we do not see any evidence of the strong astigmatism that may have been expected from Coriolis forces.

  18. Toward A 3-D Picture of Hydraulic Conductivity With Multilevel Slug Tests

    McElwee, C. D.; McElwee, C. D.; Ross, H. C.

    2001-12-01

    The GEMS (Geohydrologic Experiment and Monitoring Site) field area has been established (in the Kansas River valley near Lawrence, Kansas) for a variety of reasons relating to research and teaching in hydrogeology at the University of Kansas. Over 70 wells have been installed for various purposes. The site overlies an alluvial aquifer with a total thickness of about 70 feet. The water table is typically about 20 feet below the surface, giving a total saturated thickness of about 50 feet. The upper part of the aquifer is finer material consisting of silt and clay. Typically, the lower 35 feet of the aquifer is sand and gravel. A number of wells through out the site are fully screened through the sand and gravel aquifer. Some of these fully screened wells are larger diameters; however, most wells are constructed of 2 inch PVC casing. Slug tests are widely used in hydrogeology to measure hydraulic conductivity. Over the last several years we have been conducting research to improve the slug test method. We have previously reported the detailed structure of hydraulic conductivity that can be seen in a 5 inch well (McElwee and Zemansky, EOS, v. 80, no. 46, p. F397, 1999) at this site, using multilevel slug tests. The existing 2 inch, fully screened wells are spread out over the site and offer the opportunity for developing a 3-D picture of the hydraulic conductivity distribution. However, it is difficult to develop a system that allows multilevel slug tests to be done accurately and efficiently in a 2 inch well. This is especially true in regions of very high hydraulic conductivity, where the water velocity in the casing will be relatively high. The resistance caused by frictional forces in the equipment must be minimized and a model taking account of these forces must be used. We have developed a system (equipment, software, and technique) for performing multilevel slug tests in 2 inch wells. Some equipment configurations work better than others. The data that we have

  19. Testing of a 3 tesla superconducting magnet for the AMY detector at TRISTAN

    A 3 tesla magnet was constructed and installed in an experimental hall at TRISTAN. Cooldown and excitation tests of the magnet were carried out with a dedicated cryogenic system. The coil has a 2.39 m inner diameter and is 1.54 m long with a radial thickness of 0.1 m. The rated current is 5 kA and the stored energy is 40 MJ. The refrigerator and 17-ton magnet cold mass were cooled to 4.4 K in seven days. Then the magnet was energized to the design current of 5 kA and the mechanical stress of the coil supports was measured. The stress on the supports was well below the allowed maximum. Measurements of the discharge characteristics of the magnet confirmed that the magnet was stable and reliable

  20. Location of rut stands vs. mating opportunities in Przewalski’s gazelle: A field test of the “Resource-based Hypothesis” and “Female Traffic Version of the Hotspot Hypothesis”

    Zhangqiang YOU, Zhigang JIANG, Chunwang LI

    2011-12-01

    Full Text Available We studied the mating tactics of Przewalski’s gazelle on the Qinghai-Tibetan Plateau from 2002 to 2005. Przewalski’s gazelle is a cluster mating animal whereby female groups, including juveniles, travel to and from their resting grounds along fixed routes and dominant males stand on or near these travel routes during rut. To explain rut patterns in male gazelles, we tested predictions arising from the “Resource-based Hypothesis” and “Female Traffic Version of the Hotspot Hypothesis”. We marked the location of each rut stand and female travel route, measured food availability in each rut stand and recorded the mating opportunities of rut stand owners. We also conducted a field experiment to force female groups to change their daily travel route, and observed whether males abandon their original rut stands and shift their rut stands to new travel routes of females during the 3rd rut. We found that: (1 male gazelle defending rut stands closer to a female travel route had a higher chance of mating; (2 food resources within rut stands had no effect on mating opportunities of the rut stand owner; (3 when the female travel route was obstructed, female groups changed grazing sites, and all males abandoned their original rut stands and defended new rut stands along the new female travel route. In conclusion, the location of rut stands in relation to female travel routes is the ultimate factor for consolidating mating opportunities in male gazelle, supporting the “Female Route Version of Hotspot Hypothesis” [Current Zoology 57 (6: 701–708, 2011].

  1. Compatible growth models and stand density diagrams

    This paper discusses a stand average growth model based on the self-thinning rule developed and used to generate stand density diagrams. Procedures involved in testing are described and results are included

  2. Validity and variability of the 5-repetition sit-to-stand test in patients with multiple sclerosis

    Møller, Andreas Buch; Bibby, Bo Martin; Guldhammer, Anders;

    2012-01-01

    30 min break. Results: Significant correlations were found between the 5STS-test and isometric and isokinetic knee flexor and extensor muscle strength of the most affected leg (R = -0.60 to -0.77), and between the 5STS-test and balance performance (R = 0.69). Intra-assessor day-to-day variability......, intra-assessor test-retest variability and intra-assessor variability within test were 25.5, 22.3, and 23.1%, respectively. Inter-assessor variability within test and inter-assessor variability were 23.4 and 5.9%, respectively. Conclusions: The 5STS-test is related to lower extremity muscle strength and...

  3. High voltage test-stand research done on ICRF antenna elements of the high-harmonic fast-wave system of NSTX

    Perkins, R. J.; Ahn, J.-W.; Bortolon, A.; Brunkhorst, C.; Ellis, R.; Fredd, E.; Greenough, N.; Hosea, J. C.; Kung, C.; Miller, D.

    2015-12-01

    The twelve-strap high-harmonic fast-wave (HHFW) antenna on NSTX has exhibited a high-voltage standoff around 25 kV during previous experimental campaigns; this standoff needs to be improved for increased power coupling. During the recent NSTX-U upgrade period, a test-stand was set up with two antenna straps along with Faraday screens for testing purposes. Using a diagnostic suite consisting of a fast camera, a residual gas analyzer, a pressure gage, high-voltage probes, and an infrared camera, several interesting discoveries were made, leading to possible improvements of the antenna RF voltage operation level. First, arcing was observed outside the Faraday shields towards the low-voltage ("grounded") end of the straps (faraday shield box ends); this arcing was successfully eliminated by installing an additional grounding point between the Faraday shield box and the vessel wall. Second, considerable outgassing was observed during the RF pulse and the amount of outgassing was found to decrease with increasing RF power, possibly indicative of multipacting. Finally, infrared camera measurements of heating on the Faraday shield assembly suggest that the return currents on the Faraday shield box are highly localized at the box sides and possibly account for the pressure increase observed. Computations of these RF currents using Microwave Studio show qualitative agreement with the heated regions. New grounding points between the antenna box and the vessel have been implemented in NSTX-U, where future tests will be done to determine if the high-voltage standoff has improved. Further antenna improvements will be sought through future experiments on the test stand.

  4. Development of a clinical assessment test of 180-degree standing turn strategy (CAT-STS) and investigation of its reliability and validity.

    Kobayashi, Masaki; Usuda, Shigeru

    2016-01-01

    [Purpose] To develop a clinical assessment test of 180-degree standing turn strategy (CAT-STS) and quantify its reliability and construct validity. [Subjects] Outpatients with stroke that occurred at least 6 months previously (N = 27) who could walk 10 m without physical assistance were included. [Methods] The CAT-STS was based on the literature and discussion with four physical therapists. The final version of the CAT-STS includes seven items: direction, use of space, foot movement, initiation, termination, instability, and non-fluidity. Patients were videotaped performing a 180-degree turn while standing. The Motricity Index, gait speed and Functional Ambulation Category were also evaluated. Two raters evaluated the turn on two occasions, and inter- and intra-rater reliability were calculated. Construct validity was also calculated. [Results] Inter-rater reliability was fair or moderate for many items (kappa = 0.221-0.746). Intra-rater reliability was good-to-excellent for all items (kappa = 0.681-0.846) except direction and termination. Inter- and intra-rater reliability of the total CAT-STS score were substantial and excellent, respectively (intraclass correlation coefficient = 0.725 and 0.865, respectively). The total CAT-STS score was associated with walking ability and the time and number of steps taken to turn. [Conclusion] The total CAT-STS score is a reliable and valid measure. PMID:27065557

  5. Safety interlock system for Z-pinch primary test stand%Z箍缩初级实验平台安全联锁系统

    田青; 姜苹; 卿燕玲; 王传伟; 计策

    2012-01-01

    A Z-pinch primary test stand now being built is composed of 24 modules adopting capacitive storage scheme. It has large numbers of control and monitoring nodes, enlarged controlling scale, and complicated experiment. Here, a safety interlock system for the Z-pinch primary test stand, with higher level of experiment security performance, is developed to safeguard the security of the human and the devices. The safety interlock system consists of field units, lower computer system and remote control system. Among them, field units are composed of several switches, indicator light and alarm device, etc. Lower computer system adopts programmable logic controller ( PLC) to supervise field units. And remote control system is used to control and manage the interlock controller. The communication signals are transferred through optical fiber to avoid electromagnetic interference. C++ Builder is used as the software development platform for upper computer and network controlling. Communication between control center and the interlock system is realized by CORBA middleware. The function of parameters setting and experimental data processing is fulfilled in the central database.%正在调试的Z箍缩实验装置(Z-pinch Primary Test Stand)由24个基于Marx发生器和水线的性能、结构相同的模块组成,运行控制节点众多,控制规模大,试验过程复杂,因此要求建立Z箍缩初级实验平台安全联锁系统,具备较高的实验安全性能,以保障人身和设备安全.安全联锁系统包括现场单元、安全联锁下位机系统及远程控制系统.其中现场单元包括各种开关、指示灯、报警装置等,安全联锁下位机选用可编程逻辑控制器实现现场单元的统一监控,远程控制系统实现网络总控及统一管理.系统通信信号全部采用光纤传输,有效隔离电磁干扰.C++Builder为系统上位机及网络总控的软件开发平台,CORBA中间件技术实现总控与安全

  6. The conservation of pedunculate oak (Quercus robur) stands in the territory of Parco Lombardo Valle del Ticino (province of Milano and Pavia): main results and management proposals after three years of testing

    Bianchi L; Caronni F; Giovannini G.; Paci M

    2013-01-01

    The conservation of pedunculate oak (Quercus robur) stands in the territory of Parco Lombardo Valle del Ticino (province of Milano and Pavia): main results and management proposals after three years of testing.. In the territory of “Parco Lombardo della Valle del Ticino” an experiment, aimed to assess the silviculture pattern suitable for the conservation of stands dominated by peduncolate oak, was set up in 2008. Four experimental areas were located, both in “meso-hygrophilous” and “mesophil...

  7. Implementing a 3D histogram version of the Energy-Test in ROOT

    Cohen, E. O.; Reid, I. D.; Piasetzky, E.

    2016-08-01

    Comparing simulation and data histograms is of interest in nuclear and particle physics experiments; however, the leading three-dimensional histogram comparison tool available in ROOT, the 3D Kolmogorov-Smirnov test, exhibits shortcomings. Throughout the following, we present and discuss the implementation of an alternative comparison test for three-dimensional histograms, based on the Energy-Test by Aslan and Zech.

  8. Imaging-based liver function tests. Past, present and future; Bildgestuetzte Leberfunktionstests. Stand der Technik und zukuenftige Entwicklungen

    Geisel, D.; Hamm, B.; Denecke, T. [Charite, Campus Virchow-Klinikum, Berlin (Germany). Dept. of Diagnostic and Interventional Radiology; Luedemann, L. [Essen University Hospital (Germany). Dept. of Medical Physics

    2015-10-15

    Preoperative assessment of liver function and prediction of postoperative functional reserve are important in patients scheduled for liver resection. While determination of absolute liver function currently mostly relies on laboratory tests and clinical scores, postoperative remnant liver function is estimated volumetrically using imaging data obtained with computed tomography (CT) or magnetic resonance imaging (MRI). Accurate estimation of hepatic function is also relevant for intensive care patients, oncologic patients, and patients with diffuse liver disease. The indocyanine green (ICG) test is still the only established test for estimating true global liver function. However, more recent tools such as the LiMAx test also allow global assessment of hepatic function. These tests are limited when liver function is inhomogeneously distributed, which is the case in such conditions as unilateral cholestasis or after portal vein embolization. Imaging-based liver function tests were first developed in nuclear medicine and, compared with laboratory tests, have the advantage of displaying the spatial distribution of liver function. Nuclear medicine scans are obtained using tracers such as 99mTc galactosyl and 99mTc mebrofenin. Liver function is typically assessed using planar scintigraphy. However, three-dimensional volumetry is possible with single-photon emission computed tomography (SPECT-CT). Another technique for image-based liver function estimation is Gd-EOB-enhanced MRI. While metabolization of Gd-EOB in the body is similar to that of ICG and mebrofenin, its distribution in the liver can be displayed by MRI with higher temporal and spatial resolution. Moreover, MRI-based determination of liver function can be integrated into routine preoperative imaging. This makes MRI an ideal candidate for preoperative determination of liver function, though the best pulse sequence and the parameter to be derived from the image information remain to be identified. Another

  9. Use of phase information with a stepper motor to control frequency for tuning system of the Front End Test Stand Radio Frequency Quadrupole at Rutherford Appleton Laboratory

    Alsari, S., E-mail: s.alsari@imperial.ac.uk; Aslaninejad, M.; Pozimski, J.

    2015-03-01

    For the Front End Test Stand (FETS) linear accelerator project at the Rutherford Appleton Laboratory in the UK, a 4 m, 4 vanes Radio Frequency Quadrupole (RFQ) with a resonant frequency of 324 MHz has been designed. The RF power feeding the RFQ gives rise to the temperature increase in the RFQ, which in turn, results in shifting the resonant frequency of the RFQ. The frequency shift and the stability in the RFQ frequency can be maintained based on the reflected power or signal phase information. We have, however, investigated restoration of the RFQ nominal frequency based on the RF signal phases driving a stepper motor. The concept and the system set-up and electronics are described in detail. Results of the measurements indicating the full restoration of the RFQ nominal frequency based on the RF signal phases and stepper motor are presented. Moreover, measured sensitivity of tuner with respect to its position is given.

  10. Use of phase information with a stepper motor to control frequency for tuning system of the Front End Test Stand Radio Frequency Quadrupole at Rutherford Appleton Laboratory

    For the Front End Test Stand (FETS) linear accelerator project at the Rutherford Appleton Laboratory in the UK, a 4 m, 4 vanes Radio Frequency Quadrupole (RFQ) with a resonant frequency of 324 MHz has been designed. The RF power feeding the RFQ gives rise to the temperature increase in the RFQ, which in turn, results in shifting the resonant frequency of the RFQ. The frequency shift and the stability in the RFQ frequency can be maintained based on the reflected power or signal phase information. We have, however, investigated restoration of the RFQ nominal frequency based on the RF signal phases driving a stepper motor. The concept and the system set-up and electronics are described in detail. Results of the measurements indicating the full restoration of the RFQ nominal frequency based on the RF signal phases and stepper motor are presented. Moreover, measured sensitivity of tuner with respect to its position is given