Radiative and Hybrid Cooling of Infrared Space Telescopes

Details Radiative and Hybrid Cooling of Infrared Space Telescopes Radiative and Hybrid Cooling of Infrared Space Telescopes

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ssrv...74...45h&link_type=abstract

Space Science Reviews, Volume 74, Issue 1-2, pp. 45-56

Physics

4

Space Telescopes, Infrared, Radiative Cooling, Hybrid Cooling

Scientific paper

The designs of cold space telescopes, cryogenic and radiatively cooled, are similar in most elements and both benefit from orbits distant from the Earth. In particular such orbits allow the anti-sunward side of radiatively-cooled spacecraft to be used to provide large cooling radiators for the individual radiation shields. Designs incorporating these features have predictedT tel near 20 K. The attainability of such temperatures is supported by limited practical experience (IRAS, COBE). Supplementary cooling systems (cryogens, mechanical coolers) can be advantageously combined with radiative cooling in hybrid designs to provide robustness against deterioration and yet lower temperatures for detectors, instruments, and even the whole telescope. The possibility of such major additional gains is illustrated by the Very Cold Telescope option under study forEdison, which should offerT tel≤5 K for a little extra mechanical cooling capacity.

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