Engineering topics
Publications and source records attributed to Cafferty, T. T..
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This paper reports on the development of a two-stage radiative cooler for infrared detectors designed to operate in polar, sun-synchronous, low-earth orbit. Novelty is evident in three areas of the design; radiator/shield geometry, contamination protection, and provision for detector cooling in ambient air. An overview of the design is presented along with the results of thermal, structural and contamination control tests.
Summaries of the thermal design, analysis, and testing of a radiative cooler for the Near Infrared Mapping Spectrometer (NIMS) for the Galileo Jupiter Orbiter are presented. The radiative cooler rejects approximately 120 milliwatts of heat at a temperature of 75K when operating in the worst-case thermal environment. The cooler is designed to operate against a relatively hostile thermal environment which varies over 145 deg of instrument scan angle and which includes planetary radiation, solar radiation, and emissions from warm spacecraft surfaces (some of which rotate periodically through the radiator field of view).