Efficient Single Stage Gifford-McMahon Refrigerator Operating at 20K

  • A. Fiedler
  • J. Gerban
  • H. U. Haefner
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 43)

Abstract

In order to operate HTc-wires under high magnetic field conditions (for example: SMES) cooling with liquid nitrogen is not sufficient since a temperature between 20–30 K has to be maintained continuously in order to produce high fields. Using commercial Gifford-McMahon refrigerators this range till now was only been achieved by dual stage machines. It will be shown that such temperatures can be achieved even more efficiently by improved single stage coldheads, providing capacities of more than 25 W at 20K.

Keywords

Single Stage Cooling Performance Cold Head Sectional Drawing Stage Machine 
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.
    S.S. Kalsi et al., Proc. Applied. Supercond. Conf., Pittsburgh. (Aug. 1996)Google Scholar
  2. 2.
    by kind permission of the American Superconductor Corporation, Westborough/MAGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • A. Fiedler
    • 1
  • J. Gerban
    • 1
  • H. U. Haefner
    • 1
  1. 1.Leybold Vakuum GmbHCologneGermany

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