Low-temperature superconducting magnet

A low-temperature superconducting and magnet technology, applied in the field of superconducting, can solve the problems of equipment operation and maintenance cost increase, and achieve the effect of reducing temperature gradient, reducing use cost and reducing heat leakage

Inactive Publication Date: 2017-05-10
CHINA ELECTRONICS TECH GROUP CORP NO 16 INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the heat leakage of the magnet is large, it is necessary to increase the cooling power or passively volatilize the liquid helium to ensure the low temperature operating environment of the superconducting coil, both of which will increase the operation and maintenance costs of the equipment

Method used

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Embodiment Construction

[0023] The following description serves to disclose the present invention to enable those skilled in the art to carry out the present invention. The preferred embodiments described below are only examples, and those skilled in the art can devise other obvious variations.

[0024] Such as figure 1 A low-temperature superconducting magnet shown comprises a Dewar vessel filled with liquid helium and a superconducting winding 16 located in the Dewar vessel. The outer casing 3 and the cold shield 2 arranged between the inner casing 1 and the outer casing 3 , and the inner casing 1 and the outer casing 3 is a vacuum interlayer. Specifically, the outer casing 3 is designed to be 300K, and the cold screen is 40K.

[0025] The refrigerator 8 is installed in the low-temperature neck tube 4 and the high-temperature neck tube 7 in the vacuum interlayer of the Dewar vessel, and a magnetic shield 6 surrounds the outside of the low-temperature neck tube 4, and the magnetic shield 6 is used...

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Abstract

The invention discloses a low-temperature superconducting magnet which comprises a Dewar type container filled with liquid helium, a superconducting winding located in the Dewar type container, and a magnetic material-containing refrigerating machine partly located in the Dewar type container. The Dewar type container comprises an inner shell body, an outer shell body arranged outside the inner shell body, and a cold shield placed between the inner shell body and the outer shell body. The refrigerating machine is partly arranged between the outer shell body and the inner shell body and also comprises a magnetic shielding cover located around a magnetic material motion area in the refrigerating machine. The magnetic shielding cover is provided with at least two layers of shielding bodies with a gap between. According to the low-temperature superconducting magnet, the interference of the magnetic field of the magnetic material in the refrigerating machine on the magnetic field of the superconducting magnet can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of superconducting technology, in particular to a low-temperature superconducting magnet. Background technique [0002] The low-temperature superconducting magnet system can provide a magnetic field with high stability, high uniformity, and high field strength. It is the preferred magnet system for high-performance MRI (high-performance medical nuclear magnetic resonance imager) and other related devices. The superconducting wire windings of low-temperature superconducting magnets usually require a very low temperature working environment. Typically, this cryogenic working environment is provided by a vessel filled with a cryogenic liquid, usually liquid helium, in which the superconducting wire windings are immersed. Since cryogenic liquids, especially liquid helium, are expensive, in order to reduce the loss caused by vaporization and evaporation of cryogenic liquids, refrigerators are usually used for cooling. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F6/04H01F6/00
CPCH01F6/04H01F6/00
Inventor 郑婷
Owner CHINA ELECTRONICS TECH GROUP CORP NO 16 INST
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