The ASST Cryogenics

  • G. T. Mulholland


The ASST magnet string cryogenic refrigeration requirements were planned around an original design and a much smaller, backup, He refrigeration system. The ASST schedule required that the backup, or Plan B, helium refrigerator provide and meet all the requirements of the milestone test. The Plan B design, layout, sub-system commissioning tests, and the performance schedule will be provided. The magnet string cryogenic system pump and purge, cooldown and warmup, central and multiple shield cooling, temperature control and subcooling, and recooler operating experience are reported.


Cold Compressor Quench Response Magnet String Helium Refrigerator Supercritical Helium 
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  1. 1.
    T. Dombeck, et al., “Cryogenic and Power Testing of 50-mm Aperture Dipole Magnets at the SSCL,” DESY Conference, August, 1992.Google Scholar
  2. 2.
    W. Burgett, et al., “Full-Power Tests of a String of Magnets Comprising a Half Cell of the SSCL,” SSCL Preprint 162 (1992), accepted for publication by Particle Accelerators.Google Scholar
  3. 3.
    G. Hanowski, “Plan B-ASST Transfer Line Design,” SSCL Tech Note, March, 1993.Google Scholar
  4. 4.
    A. Winters, CCI Cryogenics, Private Communication, May 11,1992.Google Scholar
  5. 5.
    A. Yucel, “Effect of helium mass flow on cooldown,” SSCL Memo, January 8,1991.Google Scholar
  6. 6.
    W. Burgett, et al., “Cryogenic Characteristics of the SSC ASST,” IISSC paper, May, 1993.Google Scholar
  7. 7.
    A. Gulperi, A. Scheidemantle, “Recooler Test Data Analysis-ASST,” Draft, January 11,1993.Google Scholar

Copyright information

© Springer Science+Business Media New York 1994

Authors and Affiliations

  • G. T. Mulholland
    • 1
  1. 1.Superconducting Super Collider LaboratoryDallasUSA

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