Simplified Theory for Optimizing the Design of a Heat Shield in an Isochorically Operated Toroidal Dewar

  • G. D. Martin
  • K. E. Wakefield
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 17)


A proposed plasma physics experiment will make use of a magnetically levitated. mechanically isolated superconducting coil. Enclosed within a toroidal dewar that is sealed and operated isochorically within a vacuum vessel [1]; this coil will need to be recooled and re-energized daily. The minor diameter of the dewar is limited by the requirements of the plasma experiment, and the cryogenic design must therefore seek to optimize the performance of this fixed-volume system.


Heat Input Vacuum Vessel Heat Transfer Equation Heat Shield Minor Radius 
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  1. 1.
    J. File, G. Martin, R. Mills, and K. Wakefield, J. Appl. Phys., 42 (1): 6 (1971).CrossRefGoogle Scholar
  2. 2.
    P. R. Aron and G. W. Ahlgren, in: Advances in Cryogenic Engineering, Vol. 13, Springer Science+Business Media New York (1968) p. 21.Google Scholar
  3. 3.
    V. J. Johnson and R. B. Stewart, (Editors), NBS Cryogenic Engineering Laboratory WADD Tech. Rep. 60–56, Part II (1960); WADD Tech. Rep. 60–56, Part IV (1961).Google Scholar

Copyright information

© Springer Science+Business Media New York 1972

Authors and Affiliations

  • G. D. Martin
    • 1
  • K. E. Wakefield
    • 1
  1. 1.Princeton UniversityPrincetonUSA

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