Performance analysis of electric thermal switch in conduction-cooled superconducting magnet system
An electric thermal switch was designed for the conduction-cooled superconducting magnet system,and a model was built to analyze cooldown performance of the superconducting magnet system.The electric thermal switch consists of motor,push rod,conduction plate,and conduction belt with a flexible copper braid.The results show that when the cross-sectional ar-ea of the conduction belt is 500 mm2 and the residual resistivity ratio of copper is 100,the time for a superconducting magnet to cooldown from room temperature to operating temperature is reduced by 41.8％after installing the electric thermal switch in the superconducting magnet system.The cooldown time of the superconducting magnet decreases with increasing the cross-sectional area of the conduction belt,and the magnitude of the decrease gradually slows down.In addition,the cooldown time is not reduced significantly by increasing the residual resistivity ratio of copper.
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