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Proceedings Paper

Design And Performance Analysis Of The Claes NE/CO2 Cryostat
Author(s): L. G Naes; W J Horsley; C. S. Ngai; D. C. Read; T C Nast
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Paper Abstract

The Cryogenic Limb Array Etalon Spectrometer (CLAES)1 is one of nine instruments that will fly aboard the Upper Atmospheric Research Satellite (UARS)2 in the fall of 1991. CLAES is an earth-limb viewing instrument that requires cryogenic cooling of its focal plane (<15.0K), spectrometer (<30K), telescope (<150K), and baffles (<180K) in order to achieve the required performance sensitivity. Initially, the CLAES baseline design incorporated a single-stage solid hydrogen cryostat to perform the necessary cooling, however, after the Challenger shuttle disaster, the UARS and CLAES Project Offices investigated the feasibility of incorporating a completely inert cryogen system for CLAES. The result of this study showed that a dual stage Ne/CO2 cryostat would meet all sensor cooling requirements, provided that a significant increase in weight could be accommodated. In December '86, the Ne/CO2 design was adopted as the new cryostat baseline for CLAES. The focal plane and spectrometer are conductively cooled to the solid neon (13.2 K) while the telescope and internal baffles are cooled by the CO2 (121.8K). This paper describes the design and performance of the Ne/CO2 cryostat.

Paper Details

Date Published: 27 April 1988
PDF: 9 pages
Proc. SPIE 0973, Cryogenic Optical Systems and Instruments III, (27 April 1988); doi: 10.1117/12.948385
Show Author Affiliations
L. G Naes, Consultant (United States)
W J Horsley, Consultant (United States)
C. S. Ngai, Consultant (United States)
D. C. Read, Consultant (United States)
T C Nast, Consultant (United States)


Published in SPIE Proceedings Vol. 0973:
Cryogenic Optical Systems and Instruments III
Ramsey K. Melugin; Warren G. Pierce, Editor(s)

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