A superconducting magnet cooling device

Abstract

A superconducting magnet cooling device. The superconducting magnet (1) is hoisted on the lower surface of the upper end plate of the gas helium container (4) through the pull rod (6), and the superconducting magnet (1) passes through the cold conducting belt (12) and the second stage (11) of the refrigerator (9). connected, and the superconducting magnet (1) is wrapped with multiple layers of heat insulating layers (2). The gas helium container (4) is a closed container, and the neck tube (8) is positioned at the top of the gas helium container (4) and communicates with it. The gas helium container (4) is hoisted on the lower surface of the upper cover plate of the vacuum container (5) through the pull rod (7). The upper cover plate of the gas helium container (4) and the primary cold head (10) of the refrigerator (9) are sealed with indium wire. The outer periphery of the gas helium container (4) is wrapped with multiple layers of heat insulating layers (3). When the temperature of the gas helium container (4) is lower than the temperature of the superconducting magnet (1), helium is filled, and at this time, the superconducting magnet (1) is cooled by solid heat conduction and gas convection. When the temperature of the gas helium container (4) is higher than that of the superconducting magnet (1), the helium is extracted.

Description

technical field [0001] The invention relates to a cooling device for a superconducting magnet. Background technique [0002] Historically, there have been two cooling methods for superconducting magnets made of copper-based NbTi wires, liquid helium immersion cooling and cryocooler conduction cooling. [0003] The liquid helium immersion cooling method is to place a superconducting magnet in a liquid helium container, which is filled with liquid helium, and outside it is a liquid nitrogen container, which is filled with liquid nitrogen. A fully surrounded situation is formed, and the outside of the liquid nitrogen container is a vacuum container. The main disadvantage of liquid helium soaked and cooled superconducting magnets is that in order to reduce the volatilization of liquid helium, it is necessary to add a liquid nitrogen protection container; in addition, when the magnet quenches, if the pressure relief device fails, it will cause the liquid helium container to over...

AI Technical Summary

Problems solved by technology

Applications of thermal switches are limited to superconducting magnets cooled by small to medium sized refrigerators due to heat leakage from the switch housing

When applied to superconducting magnets cooled by large-scale refrigerators, the operating temperature margin of the magnets has to be increased, resulting in a reduction in the current-carrying performance of the superconducting magnets

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