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US 5,309,106 AGranted
Magnetic field generator
AssigneesHitachi, Ltd., Hitachi Instrument Engineering Co., Ltd.
InventorsGoh Miyajima, Takao Takahashi, Takehiko Konno
Life of this patent
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Abstract
Apparatus for cancelling magnetic fields for cancelling a leakage magnetic field from a static magnetic field generation assembly are disposed outside the static magnetic field generation assembly. A magnetic shield made of a magnetic substance is disposed between the static magnetic field generating assembly and the cancelling magnetic field apparatus. The cancelling magnetic field generation apparatus is of a cryostatless type.
Claims17
A magnetic field generating system comprising:
- means for generating a static magnetic field in a predetermined direction inside a predetermined space;
- a magnetic shield encircling said predetermined space to constrain the static magnetic field;
- and
- means for generating a cancelling magnetic field encircling said magnetic shield to cancel leakage magnetic field resulting from the static magnetic field escaping from said magnetic shield.
1 more element
Dependencies are inferred from the claim text.