质谱分析多系统航天器检漏研究

采用示漏气体初值和终值及样值循环比较测量 ,直接注入示漏气体到收集室标定多系统漏率 ,使标准气样离子流和终值离子流尽可能一致 ,避开四极质谱计测量的线性和长期重复性问题 ,研制了以 GAM50 0质谱系统为核心的多系统航天器检漏设备。分析了收集室密封性能和循环风量对检漏结果的影响、取样和质谱分析的物理过程。在大气环境下 ,最小可检漏率灵敏度达到 1 0 - 6Pa· m3/s。介绍了新型航天器多系统检漏的试验结果 ,提高了检漏的可靠性 ,大大地节约了检漏时间和费用。

The Study of Mass Spectrometer Analysis Leak Detection for Multi-system Spacecraft

Circularly compared measure of search gas sample data,end data and beginning data is used.The standard search quantity gas is directly injected into cumulating room to calibrate the leak rate of multi-system spacecraft.The problems of the linearity and repeat in long time for quadrupole mass spectrometer (QMS) measure are avoided.The apparatus of leak detection of multi-system spacecraft with GAM500 mass spectrometer was manufactured.In the air environment the sensitivity of minimum leak detection is 10 -6Pa·m 3/s.The leak detection results of new multi-system spacecraft are introduced.The reliability is increased.The leak detection time and the leak detection cost are cut down.