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US 2016/0365183 A1Published application
Superconducting magnet
AssigneeSumitomo Electric Industries, Ltd.
InventorsTakashi NISHIMURA, Takeshi KATO
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Abstract
A coil unit (10) is formed of an oxide superconducting wire having a surface in a form of a strip and wound. A residual magnetic field restraint unit (81) is disposed in the coil unit (10). The residual magnetic field restraint unit (81) has a throughhole (HL) extending in an axial direction (Aa) of the coil unit (10). The residual magnetic field restraint unit (81) is formed of a magnetic substance. A residual magnetic field can thus be restrained.
Claims5
1:
- A superconducting magnet comprising:
- a coil unit formed of an oxide superconducting wire having a surface in a form of a strip and wound;
- a residual magnetic field restraint unit formed of a magnetic substance, disposed in said coil unit, and having a throughhole extending in an axial direction of said coil unit, and
- the residual magnetic field restraint unit has a length in the axial direction larger than a length of the coil unit in the axial direction,
- wherein said residual magnetic field restraint unit includes a pipe having a wall thickness equal to or larger than 1 mm;
- and
- wherein said residual magnetic field restraint unit configures a portion of a container that accommodates said coil unit therein.
4 more elements
2:
- The superconducting magnet according to claim 1, wherein said magnetic substance has a maximum magnetic permeability equal to or larger than 100.
3:
- The superconducting magnet according to claim 1, wherein said residual magnetic field restraint unit has a length in said axial direction equal to or larger than a width of said surface in the form of said strip of said oxide superconducting wire.
4-13. (canceled)
14:
- The superconducting magnet according to claim 1, wherein said pipe of said residual magnetic field restraint unit has a wall thickness equal to or smaller than 10 mm.