Superconducting switch testing device

Abstract

The invention discloses a superconducting switch testing device, which comprises a 300K container, a 50K cold shield arranged in the 300K container, a testing container which is arranged in the 50K cold shield and is internally provided with liquid helium, and a cold head container which is arranged in the 50K cold shield and is used for placing a 4K cold head, the 50K cold shield has a common cold conduction base, a test cold conduction base of the test container and a cold head cold conduction base of the cold head container are both fixed on the common cold conduction base, the 4K cold head is connected with the cold head cold conduction base, the test container and the cold head container are communicated through a gas communicating pipe, a switch test assembly is installed in the test container, and a test switch is immersed in liquid helium, and a superconducting coil is arranged at the lower part of the test container. The superconducting switch testing device cools the testing container through convective heat transfer and heat conduction at the same time, the cooling speed is high, liquid helium consumption is reduced, and low-temperature stability is improved.

Description

technical field [0001] The invention relates to the technical field of superconducting switch testing, in particular to a superconducting switch testing device. Background technique [0002] The conventional switch test device is to pre-fix the switch inside the superconducting coil of the background field, and the coil and the switch form a whole. In the test process, the switch test device needs to be put into the 4K container of the switch test system, and a large amount of liquid will be consumed during the process helium. [0003] In the prior art, the service tower has detachable current leads. During excitation, the current leads need to be cooled by liquid helium evaporation to work normally. Liquid helium will be consumed during the excitation process. In order to ensure the safety of excitation, sufficient liquid helium needs to be stored in the 4K container. Please refer to figure 1 , figure 1 It is a schematic diagram of a typical switch testing device in the ...

AI Technical Summary

Problems solved by technology

However, the cooling efficiency of the 4K cold head is low; the second stage of the cold head of the 4K cold head cools the superconducting magnet through flow heat exchange, and the cooling speed is slow; the control circuit 21, the copper soft connection 15, the test container 6, and the cold head container And the superconducting switch 9 is suspended and fixed in the 50K cold screen, which affects the conduction cooling of the superconducting switch and joints; the superconducting coil is not equipped with a thermal radiation screen, which affects the temperature distribution uniformity of the superconducting coil

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