Thermal and cryogenic aspects of the ISO optical subsystem

Details Thermal and cryogenic aspects of the ISO optical subsystem Thermal and cryogenic aspects of the ISO optical subsystem

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988tcls.rept..399c&link_type=abstract

In ESA, Third European Symposium on Space Thermal Control and Life Support Systems p 399-405 (SEE N89-28214 22-54)

Astronomy and Astrophysics

Astronomy

Cryogenic Cooling, Cryogenic Equipment, Infrared Space Observatory (Iso), Radiative Heat Transfer, Infrared Astronomy, Liquid Helium, Spacecraft Models, Sunlight, Thermal Analysis

Scientific paper

The ISO Optical Subsystem is composed of a cold telescope, a main baffle, and a sunshade. Low temperatures are needed to reduce infrared noise produced by thermal self emission. The telescope and the baffle are cooled down to 3 K and 8 K by heat exchange with helium gas evaporated from a superfluid helium tank. The sunshade is cooled by radiation towards space, using a radiator. The analyses were performed using VWHEAT/ESATAN thermal models. A bulk model was used for design. Detailed models of the telescope, of the main baffle, and of the sun shade were established for local analysis and design. The design fulfills the requirements.

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