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- W2078659552 abstract "For a space telescope the abatement of gaseous contamination of the optical surfaces by means of a gas purging system has been analysed. Contaminants considered were outgassing materials of the housing walls and ambient molecules, both condensable onto the critical surfaces. The mathematical model is based on binary elastic collision between the purge gas and the contaminant molecules. The results have been applied to investigate the feasibility of a gas purge system to be used during the thermal vacuum (heat balance) test of the planned German infra-red telescope facility for Spacelab (GIRL). It is shown that for the purge gases nitrogen and argon the contaminant deposition may be reduced by up to two orders of magnitude. The required pumping speed and throughput values of the test chamber vacuum system, necessary to remove the purge gas, are in a typical capability range for this size of test facilities." @default.
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- W2078659552 date "1985-04-01" @default.
- W2078659552 modified "2023-09-27" @default.
- W2078659552 title "The effectiveness of gas purging to reduce contamination under thermal vacuum conditions" @default.
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- W2078659552 doi "https://doi.org/10.1016/0042-207x(85)90657-8" @default.
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