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VACUUM ›› 2023, Vol. 60 ›› Issue (3): 67-71.doi: 10.13385/j.cnki.vacuum.2023.03.11

• Measurement and Control • Previous Articles     Next Articles

Research of the Leak Rate Conversion for Xenon and Tracer Gas

HAN Yan1, SUN Li-chen1, WANG Jing-tao1, LIU Yi-huan1, CHEN Wen-qing2, SUI Xiao-xiang2   

  1. 1. Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China;
    2. CGN Inspection Technology Co., Ltd., Suzhou 215004, China
  • Received:2022-09-02 Online:2023-05-25 Published:2023-05-30

Abstract: The electric propulsion technology is an important propulsion system technology for Chinese satellites in the future. It has the advantages of higher specific impulse, lower thrust and higher propellant utilization compared to the conventional chemical propulsion. The ion thrusters mainly use xenon as propellant. Helium is used as the leakage gas in the conventional sealing test of the propulsion system. There is a conversion relationship between the leakage detection result and the actual leakage rate of the xenon. In order to accurately evaluate the actual leakage state and leakage rate of the electric propulsion system, it is urgent to carry out relevant research. In this paper, the feasibility of xenon in-situ leak detection technology is verified by building a several tracer gases testing system. Through theoretical analysis and experimental research, the leak rate conversion relationship between xenon, helium and krypton, as well as the theoretical upper and lower limits of the conversion coefficient, are preliminarily obtained. It will provide a reference for the leak detection of the electric propulsion system.

Key words: electric propulsion system, leak test, xenon, conversion relationship, leak rate

CLC Number:  V19

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