Computer Science – Performance
Scientific paper
Mar 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4850.1109l&link_type=abstract
IR Space Telescopes and Instruments. Edited by John C. Mather . Proceedings of the SPIE, Volume 4850, pp. 1109-1119 (2003).
Computer Science
Performance
Scientific paper
CIVA/Mars is a space miniaturized spectral imaging microscope. It is designed to in-situ analyze samples on Mars surface. It requires the use of a double cooling system : a passive cooling for the global instrument which will be maintained at a temperature higher than 160 K and an active cooling system for the IR MCT detector matrix which must be maintained at a temperature lower than 140 K. Taking into account the mission constraints, a trade-off analysis of available active cooling systems led to the choice of a thermoelectrical cooler (TEC). Space validation tests of standard multi-stage TECs were performed. Performances did not meet the technical specifications of the instrument. Two types of customized TEC modules were then designed and manufactured : mechanical prototypes from RMT Ltd. and optimized modules from Marlow Ind. A first RMT prototype passed the vibration &shock qualification tests and a second passed the low temperatures vacuum qualification tests with few margins. A Marlow optimized module passed the low temperatures vacuum qualification tests; its characteristics and performances make it compatible with CIVA/Mars. In this paper, the instrument mission and characteristics are first presented. Then TEC design studies are discussed. Finally, optimized TEC space qualification tests are detailed, and the performances analyzed.
Bibring Jean-Pierre
Lamartinie Sujit
Soufflot Alain
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