Electrically conductive shield for refrigerator

A conductive shielding and refrigerator technology, which is applied in refrigerators, refrigeration and liquefaction, circuits, etc., can solve the problems of expensive bismuth alloys and lack of thermal conductivity.
CN1957429AActive Publication Date: 2007-05-02SIEMENS HEALTHCARE GMBH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SIEMENS HEALTHCARE GMBH
Publication Date
2007-05-02

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Abstract

A cryogenic magnet system, comprising a cryogenic vessel (1) housing a magnet winding, a vacuum jacket (3) enclosing the cryogenic vessel and a refrigerator (4) at least partially housed within the vacuum jacket and thermally linked (6) to the cryogenic vessel. In particular, the system further comprises an electromagnetic shield.
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Description

technical field

[0001] The invention relates to a cryogenic magnet arrangement for generating a uniform magnetic field. In particular, the present invention relates to a shield disposed around a cryogenic refrigerator to reduce the effect of the cryogenic refrigerator on the stability of a synthetic magnetic field. Background technique

[0002] MRI magnet systems typically include cryogenic magnet arrangements and are used for medical diagnosis. MRI magnets require a stable, uniform magnetic field. To achieve stability, superconducting magnet systems are typically employed that operate at very low temperatures, which are typically maintained by cooling the superconductor by immersing it in a cryogenic fluid, usually liquid helium. Cryogenic fluids, especially helium, are expensive and it is desirable that the magnet system be designed and operated in such a way that the use of this cryogenic fluid is minimized.

[0003] The superconducting magnet system generally includes...

Claims

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