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VACUUM ›› 2022, Vol. 59 ›› Issue (1): 64-67.doi: 10.13385/j.cnki.vacuum.2022.01.12

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Experimental Study on Thermal Connection Mode in Ultra-low Temperature Region

LUO Wei1, LI Zhuo-hui1, ZHOU Xiao-dong2, WANG Xiao-zhan1, SUN Cheng-kai1, GUAN Yang1, JIN Zhao-feng1, LIU Hai-jing1   

  1. 1. Shanghai Institute of Spacecraft Equipment, Shanghai 201100, China;
    2. Shanghai Academy of Spaceflight Technology, Shanghai 201100, China
  • Received:2021-11-19 Online:2022-01-25 Published:2022-01-27

Abstract: In order to verify the influence of different thermal connection modes in ultra-low temperature zone on the cooling of cryogenic radiation source, a vacuum thermal test system in ultra-low temperature zone was established, and the ultra-low temperature thermal conductivity characteristics of three types of thermal connectors were tested. The results show that the high purity copper and aluminum below 40K show excellent thermal conductivity performance. Under the premise of structural permits, the cooling time of the cold shield can be reduced by increasing the thermal cross-sectional area of the thermal connector, shortening the thermal path and reducing the heat capacity of the thermal connector. At the same time, the non-directional structure of cold shield can be optimized by using flexible thermal connectors. The results can be used to guide the structure optimization of cryogenic radiation source and the design of non-directional cryogenic radiation source, and provide experimental data for cryogenic radiation source test.

Key words: ultra-low temperature zone, thermal connection, cryogenic radiation source, high vacuum, experimental study

CLC Number: 

  • V11
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