A 60-in.-Diameter, Levitated Super-Conducting Coil Thermally Shielded by Lead

  • J. W. Willard
  • G. D. Martin
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 18)


As previously reported [1–3], a 60-in.-diameter superconducting coil is levitated in the FM-1 machine at the Plasma Physics Laboratory, Princeton University. Based on the findings of previous studies [4, 5], a 60-in.-major-, 7.125-in.-minor diameter dewar thermally shielded by lead has been constructed. This dewar increases the isochoric operating time of the superconducting coil from 1.4 to 11.5 hr. The major physical data pertaining to this coil and dewar are shown in Table I.


Lead Shield Heat Transfer Tube Coil Form Solder Bath Glass Epoxy 
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  1. 1.
    J. File, in: Proceedings on Engineering Problems of Fusion Research,Los Alamos Scientific Laboratory, New Mexico (1969), LA-4250, A6.Google Scholar
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    J. File, G. D. Martin, R. G. Mills, and J. L. Upham, J. Appl. Phys., 39: 2623 (1968).CrossRefGoogle Scholar
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    J. W. Willard, J. File, and G. D. Martin, IEEE Trans, Nucl. Sci., NS-18: 283 (1971).Google Scholar
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    G. D. Martin and K. E. Wakefield, in: Advances in Cryogenic Engineering, Vol. 17, Springer Science+Business Media New York (1972), p. 449.Google Scholar
  5. 5.
    G. D. Martin and J. W. Willard, IEEE Trans., Nucl. Sci., NS-18: 273 (1971).Google Scholar

Copyright information

© Springer Science+Business Media New York 1973

Authors and Affiliations

  • J. W. Willard
    • 1
  • G. D. Martin
    • 1
  1. 1.Princeton UniversityPrincetonUSA

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