Keyword: superconducting-magnet
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TUP164 Magnetic Design of e-lens Solenoid and Corrector System for RHIC solenoid, dipole, electron, proton 1130
 
  • R.C. Gupta, M. Anerella, W. Fischer, G. Ganetis, A.K. Ghosh, X. Gu, A.K. Jain, P. Kovach, A. Marone, A.I. Pikin, S.R. Plate, P. Wanderer
    BNL, Upton, Long Island, New York, USA
 
  Funding: This work is supported by the U.S. Department of Energy under Contract No. DE-AC02-98CH10886.
As a part of the proposed electron lens system for RHIC, two 6 T, 200 mm aperture, 2.5 meter long superconducting solenoids are being designed and built at BNL. Because of several demanding requirements this has become a unique and technologically advanced magnet. For example, the field lines on axis must be straight over the length of the solenoid within ±50 microns. Since this is beyond the normal construction techniques, a correction package becomes an integral part of the design for which a new design has been developed. In addition, a minimum of 0.3 T field is required along the electron beam trajectory in the space between magnets. To achieve this fringe field superconducting solenoidal coils have been added at the two ends of the main solenoid. The main solenoid itself is a challenging magnet because of the high Lorentz forces and stored energy associated with the large aperture and high fields. An innovative structure has been developed to deal with the large axial forces at the ends. This paper will summarize the magnetic design and optimization of the entire package consisting of the main solenoid, the fringe field solenoids, and the corrector system.
 
 
TUP165 Design, Construction and Test of Cryogen-Free HTS Coil Structure vacuum, instrumentation, quadrupole, radiation 1133
 
  • H.M. Hocker, M. Anerella, R.C. Gupta, S.R. Plate, W. Sampson, J. Schmalzle, Y. Shiroyanagi
    BNL, Upton, Long Island, New York, USA
 
  Funding: Work supported by the U.S. Dept. of Energy under Contract No. DE-AC02-98CH10886 & under Coop. Agreement DE-SC0000661 from DOE-SC that provides financial assistance to MSU to design and establish FRIB
This paper will describe design, construction and test results of a cryo-mechanical structure to study coils made with the second generation High Temperature Superconductor (HTS) for the Facility for Rare Isotope Beams (FRIB). A magnet comprised of HTS coils mounted in a vacuum vessel and conduction-cooled with Gifford-McMahon cycle cryocoolers is used to develop and refine design and construction techniques. The study of these techniques and their effect on operations provides a better understanding of the use of cryogen free magnets in future accelerator projects. A cryogen-free, superconducting HTS magnet possesses certain operational advantages over cryogenically cooled, low temperature superconducting magnets.
 
 
TUP175 Fabrication of the Jefferson Laboratory Cryogenic Control Reservoirs vacuum, cryogenics, controls, FEL 1157
 
  • M.L. Seely, E.C. Bonnema, D.J. Carvelli, E.K. Cunningham, E.C. Kasper, G.D. Korecky
    Meyer Tool & MFG, Oak Lawn, Illinois, USA
 
  Meyer Tool and Manufacturing of Oak Lawn IL is manufacturing six Cryogenic Control reservoirs CCRs) for the Jefferson Laboratory. Five of the CCRs will be installed in the new Super High Momentum Spectrometer (SHMS) planned for Jefferson Lab's Hall C and the sixth will be installed in Hall D. Both projects are part of the 12 GeV upgrade to the CEBAF accelerator . The CCRs are a cryogenic distribution box designed by the Jefferson Laboratory. They include internal reservoirs in order to provide a continuous supply liquid helium and liquid nitrogen to magnets through periods of disruption in the external supply. This paper discusses the manufacturing and process measures that were implemented in order to meet the Department of Energy requirements for pressure vessels (10CFR851 Appendix A Part 4), to eliminate brazing flux contamination, and to reduce weld distortion in multiple internal vessels. The CCRs will undergo pressure and vacuum testing at Meyer Tool before being installed by the magnet manufacturer.  
 
TUP217 The Application of 400KW DC Bank for Cryogenic System at NSRRC cryogenics, booster, controls, synchrotron 1217
 
  • H.C. Li, S.-H. Chang, W.-S. Chiou, F. Z. Hsiao, T.F. Lin, H.H. Tsai
    NSRRC, Hsinchu, Taiwan
 
  There will be a power sag (>50% drop) several times and annual maintenance of power company every year that course cryogenic system shutdown and take hours to recover. We install the AC UPS to maintain a steady power supply to the control circuit and low power devices to avoid such incidences. However, the AC UPS is not suitable for the 315-kW compressor with inverter due to the harmonic distortion effect and low power factor. We built two sets of 400-kW DC UPS (also called DC Bank system) to keep two 315-kW compressor in full load operation at least 3 minutes when power sag or power cut-off in 2010. The DC Bank was parallel connect to the inverter, thus, will not affect the inverter operation when DC Bank need to maintenance or failure. This paper presents the configuration of DC Bank and the test of the system. Results show that when the inverter is operated at 242KW with main power cut off, the helium compressor is keeping stable operation for 257 seconds by DC Bank support.