Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Superconductive type
Patent
1994-02-25
1995-07-04
Picard, Leo P.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Superconductive type
62 521, F17C 702, H01F 100
Patent
active
054304237
ABSTRACT:
A superconducting magnet includes a cryocooler coldhead, a sleeve assembly, and a superconducting coil assembly. The sleeve assembly includes a flexible bellows and a sleeve tube and is attached to the superconducting coil assembly so that it may be retracted about one-eighth of an inch breaking thermal contact of the sleeve assembly with the coil assembly's magnet cartridge and thermal shield while remaining hermetically connected to the coil assembly's vacuum enclosure. The coldhead's housing is attached to the sleeve assembly so that the coldhead's first and second stage make unconnected thermal contact with the sleeve assembly. By first retracting the sleeve assembly, the coldhead may be removed therefrom without room temperature air forming an ice ball on the surfaces of the sleeve assembly and without a heat load being transferred to quench the superconducting coil assembly. This permits continuous magnet operation using dual coldheads and dual sleeve assemblies.
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Herd Kenneth G.
Laskaris Evangelos T.
Thompson Paul S.
Erickson Douglas E.
General Electric Company
Picard Leo P.
Ryan Stephen T.
Webb II Paul R.
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