Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988tcls.rept..413r&link_type=abstract
In ESA, Third European Symposium on Space Thermal Control and Life Support Systems p 413-420 (SEE N89-28214 22-54)
Astronomy and Astrophysics
Astronomy
Esa Satellites, Gamma Ray Astronomy, Gamma Ray Spectrometers, Temperature Control, Cryogenic Cooling, Multilayer Insulation, Spacecraft Radiators, Stirling Cycle
Scientific paper
The necessity of keeping GRASP telescope (Gamma Ray Astronomy with Spectroscopy and Positioning) detectors at working temperatures within an adequate range (85 + or - 15 K for the germanium and 283 + or - 20 K for CsI) is discussed. Thermal control based in cryogenic liquid tanks is not considered the most suitable solution because of mass and lifetime considerations. Instead of this conventional solution, a concept using a combination of passive and active cooling systems was chosen. It combines the features of a corrugated radiator panel, thermal shields, MLI blankets, and an extra cooling system based on the Stirling cycle engine.
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