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A Gaseous-Helium Cooling System for a High-Tc Superconducting Coil

  • K. G. Herd
  • R. A. Ackermann
  • P. S. Thompson
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 43)

Abstract

A gaseous-helium cooling system for a high-Tc coil operating at 20K is described. The system uses a two-stage Gifford-McMahon (GM) coldhead and counterflow heat exchangers to cool a pressurized flow of helium gas from room temperature down to approximately 19K. The cold helium gas circulates through a vacuum-insulated transfer line to a single-pass heat exchanger in contact with an epoxy-impregnated high-Tc coil The coil was wound using 2000 meters of Bi-2223 tape produced by Intermagnetics General Corporation (IGC). A water-cooled rotary compressor supplies pressurized helium gas to both the GM coldhead and the helium gas cooling circuit, in parallel. Descriptions of the coldbox configuration, the flow control and temperature monitoring systems, the high-Tc coil, and the test dewar are given. Test results, including the cooldown and energization of the Bi-2223 coil, are included.

Keywords

Heat Exchanger Coil Heating Heat Leak Coil Heat Exchanger Coil Assembly 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    K.G. Herd, L. Salasoo, E.T. Laskaris, R. Ranze, C.G. King, P. Haldar, and J.G. Hoehn, Development and Fabrication of a Bi-2223 Racetrack Coil for Generator Applications. IEEE Transactions on Applied Superconductivity 7:531 (1997).CrossRefGoogle Scholar
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    L. Salasoo, KG. Herd, E.T. Laskaris, H.R. Hart, and M.V.K. Chari, Test Results for a Bi-2223 HTS Racetrack Coil for Generator Applications. IEEE Transactions on Applied Superconductivity 7:535 (1997).CrossRefGoogle Scholar
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    C.G. King, D.A. Grey, A. Mantone, K.G. Herd, and E.T. Laskaris, Mechanical Stabilization of BSCCO-2223 Superconducting Tapes. IEEE Transactions on Applied Superconductivity 7:2046 (1997).CrossRefGoogle Scholar
  4. 4.
    K.G. Herd, Remote Cooling System for a Superconducting Magnet, U.S. Patent 5.485.730 (1996).Google Scholar
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    K.G. Herd and E.T. Laskaris, High-Tc Superconducting Leads Assembly in a Cryostat Dual Penetration for Refrigerated Superconducting Magnets. U.S. Patent 5,260,266, (1993).Google Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • K. G. Herd
    • 1
  • R. A. Ackermann
    • 1
  • P. S. Thompson
    • 1
  1. 1.GE Corporate Research and DevelopmentSchenectadyUSA

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