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The leak rate of spacecraft port must meet certain standards during the opening and closing processes. The port quick leak detector can be used to on-line measure leak rates of spacecraft port. In this work, a new calibration apparatus is designed and investigated. It can work at different temperatures with different gases in a wide leak rate range. This apparatus consists of the standard leak rate...
A new measurement apparatus for vacuum materials outgassing rate was developed, which is mainly composed of three systems, including ultra-high vacuum system, high vacuum system, switching between two pumping paths (SPP) measurement system. The test principle of the modified SPP method is described in details, and the newly-developed technique has two main advantages over the conventional one. Firstly,...
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