Electricity: conductors and insulators – With fluids or vacuum – With cooling or fluid feeding – circulating or distributing
Patent
1992-07-01
1994-03-29
Picard, Leo P.
Electricity: conductors and insulators
With fluids or vacuum
With cooling or fluid feeding, circulating or distributing
335216, 505885, 505887, H01B 1200
Patent
active
052986799
ABSTRACT:
A vapor cooled current lead for a superconducting device located in a cryostat includes a normal conductor section extending from ambient conditions inward to an intermediate point, and a composite lead having a ceramic high temperature superconductor core with a metallic sheath extending between the normal conductor section and the superconducting device, preferably in a helical path to reduce heat leak by conduction. The metallic sheath is stripped away at spaced intervals, preferably adjacent the low temperature end of the composite lead, and the gaps are filled with a filler which provides mechanical strength for the core and reduces thermal conduction. A flow of cryogen vapor directed by a tubular housing maintains the high temperature superconducting material below its critical temperature, and cools the normal conductors.
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K. Sato, et al., High-J.sub.c Silver-Sheathed BL-Based Superconducting Wires, IEEE Transactions on Magnetics, vol. 27, No. 2, Mar., 1991, pp. 1231-1238.
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Dederer Jeffrey T.
Singh Sharad K.
Wu Jiing-Liang
Horgan Christopher
Lynch M. P.
Picard Leo P.
Westinghouse Electric Corp.
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