Physics
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.1765..197v&link_type=abstract
In: Cryogenic optical systems and instruments V; Proceedings of the Meeting, San Diego, CA, July 23, 24, 1992 (A93-28226 10-19),
Physics
Cryogenic Temperature, Focal Plane Devices, Infrared Instruments, Infrared Telescopes, Space Shuttle Payloads, Temperature Control, Atmospheric Radiation, Flow Velocity, Liquid Helium, Michelson Interferometers
Scientific paper
The Cryogenic InfraRed Radiance Instrumentation for Shuttle (CIRRIS 1A) instrument, successfully flown and operated on the Shuttle Discovery from 28 April to 6 May 1991, was designed to operate at supercritical helium temperatures. During flight, the focal plane temperature control and telescope contamination purge systems performed as designed and 36 hours of excellent data was obtained; however, the parasitic helium flow rate was higher than expected. This paper reviews thermal data obtained for the CIRRIS 1A cooling system during both ground and flight operations. The temperature control and purge systems are discussed, along with helium flow rates, dewar helium pressure, and thermal stratification. In addition, possible reasons for the high on-orbit parasitic flow rate are presented.
Landoch Andrew
Morse David E.
Vendell E. W.
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