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VACUUM ›› 2020, Vol. 57 ›› Issue (4): 46-49.doi: 10.13385/j.cnki.vacuum.2020.04.10

• Vacuum Acquisition System • Previous Articles     Next Articles

Research on the Total Leakage Test Technology with Static Pressure Rise Method for Sealed Biological Payload

ZHANG Hai-feng, SUN Li-chen, GUO Chong-wu, QI Fei-fei, LI Wen-bin   

  1. Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China
  • Received:2019-10-23 Online:2020-07-25 Published:2020-07-23

Abstract: The biological payload was carried to the far side of the moon through Chang′e 4 probe and carried out experiments on biological growth.In order to maintain the atmospheric environment for a long time on the lunar surface, it was necessary to strictly control the air leakage rate of the payload container. The internal medium of the sealed biological payload was air, the payload didn′t have leak detection interface, it didn′t allow to be filled with other leak detection gas and couldn′t use the mass spectrum leak detection method.The total leakage rate of the biological payload was tested successfully through the static pressure rise method, the problem of testing the total leakage was solved, and the biological experiment was successfully carried out on the lunar surface.

Key words: seal, biological payload, static pressure rise method, total leakage

CLC Number: 

  • TB774
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