Electricity: conductors and insulators – With fluids or vacuum – With cooling or fluid feeding – circulating or distributing
Patent
1994-01-10
1996-10-08
Sough, Hyung S.
Electricity: conductors and insulators
With fluids or vacuum
With cooling or fluid feeding, circulating or distributing
62 511, 505885, 505900, 335216, H01B 1200, H01F 600
Patent
active
055633692
ABSTRACT:
A superconducting magnet is arranged in a helium tank, and the superconducting magnet cooled to a very low temperature by liquid helium in the helium tank is connected to a power source kept at room temperature by a current lead and a current lead. The current leads are constituted by conductors made of copper or a copper alloy having a residual resistivity of 5.times.10.sup.-8 .OMEGA..multidot.m or more. In a helium tank, a persistent current switch, cooled by liquid helium, for connecting the conductor to the conductor, is arranged. The persistent current switch magnetizes the superconducting magnet to a persistent current mode and demagnetizes it from the persistent current mode. The helium tank is arranged in a vacuum housing.
REFERENCES:
patent: 2064184 (1936-12-01), Stevens
patent: 3278808 (1966-10-01), Bonfeld
patent: 3371145 (1968-02-01), Camille, Jr.
patent: 3849589 (1974-11-01), Schmidt et al.
patent: 4091298 (1978-05-01), Gamble
Magnet Technology II, pp. 1381-1386, Aug. 28, 1989, T. Yazawa, et al., "Current Leads Design Considering Unsteady State".
Yasuda Satoshi
Yazawa Takashi
Kabushiki Kaisha Toshiba
Sough Hyung S.
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