Design And Performance Analysis Of The Claes NE/CO2 Cryostat

L. G Naes; W J Horsley; C. S. Ngai; D. C. Read; T C Nast

doi:10.1117/12.948385

27 April 1988 Design And Performance Analysis Of The Claes NE/CO₂ Cryostat

L. G Naes, W J Horsley, C. S. Ngai, D. C. Read, T C Nast

Proceedings Volume 0973, Cryogenic Optical Systems and Instruments III; (1988) https://doi.org/10.1117/12.948385
Event: 32nd Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1988, San Diego, CA, United States

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.

Citation Download Citation

L. G Naes, W J Horsley, C. S. Ngai, D. C. Read, and T C Nast "Design And Performance Analysis Of The Claes NE/CO₂ Cryostat", Proc. SPIE 0973, Cryogenic Optical Systems and Instruments III, (27 April 1988); https://doi.org/10.1117/12.948385

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