Thermal Management of JWST Cryo-Vacuum Test Support Equipment

Havey, Keith A, Jr ; Cooke, Dwight A ; Huguet, Jesse A ; Day, Robert L

关键词: TEMPERATURE CONTROL;    JAMES WEBB SPACE TELESCOPE;    CRYOGENICS;    VACUUM TESTS;    VACUUM CHAMBERS;    METROLOGY;    GROUND SUPPORT EQUIPMENT;    SIMULATORS;   

RP-ID  :  GSFC-E-DAA-TN58596

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来源: NASA Technical Reports Server

【 摘 要 】

In 2017, the James Webb Space Telescope (JWST) underwent functional testing and optical metrology verification of the combined Optical Telescope Element and Integrated Science Instrument Module (OTIS) under cryogenic vacuum conditions in Chamber A at the Johnson Space Center. The ground support and test equipment developed and tested over the previous decade to facilitate this test event were crucial elements of its success. Ground systems required for this test fall into several groups, including thermal simulators, mechanical support hardware, telemetry systems, and metrology systems. This paper will provide a summary of these systems, their development challenges, key features, and highlight thermal performance in the cryovac test.