Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Superconductive type
Patent
1991-06-06
1994-04-19
Picard, Leo P.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Superconductive type
62 15, H01L 3900, H01F 722
Patent
active
053049721
ABSTRACT:
A superconducting coil incorporated in the superconducting magnet apparatus of the invention is shaped annular or cylindrical, and thus surrounds a photographing field. The coil has an axis which is substantially perpendicular to the line of gravity, i.e., extending in the horizontal direction. The coil is contained in a coolant vessel of a double structure filled with a coolant (e.g. liquid helium). Specifically, it is contained in a first coolant vessel, together with a predetermined small amount of liquid helium. The vessel has a receiving space defined therein and shaped similar to the coil. The space is large enough to receive the coil and the coolant with a predetermined gap. The coolant vessel comprises a first cylindrical wall contacting the inner periphery of the coil, a second cylindrical wall coaxial with the first cylindrical wall and having an inner diameter larger than the outer diameter of the coil and a pair of annular end walls arranged at both opposite ends of the first and second cylindrical walls, thereby closing, in a liquidtight/airtight manner, the gap formed by the walls. That is, the coil is received, in a manner coaxial with the first and second cylindrical walls, in a receiving space defined by the cylindrical walls and annular end walls.
REFERENCES:
patent: 3363207 (1968-01-01), Brechna
patent: 4578962 (1986-04-01), Dustmann
patent: 4726199 (1988-02-01), Takano et al.
Barrera Raymond
Kabushiki Kaisha Toshiba
Picard Leo P.
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