Performance Improvement of the CHeX Flight Cryostat
The JPL flight cryostat last flew on the Space Shuttle in October, 1992 in support of the Lambda Point Experiment. A new experiment, the Confined Helium Experiment (CHeX), now in development will reuse this cryostat. An improvement to the cryostat performance was necessitated by the CHeX experiment having a longer mission requirement and stricter requirements imposed by NASA with respect to a launch-scrub turnaround scenario. The parasitic heat load reduction necessary to relieve both constraints was about 15% or 1 liter/day. The techniques implemented to achieve this goal, and subsequent results are presented along with a thermal model used during the analysis of the cryostat.
KeywordsHelium Epoxy Stratification Grease Manganin
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- 1.D. Petrac, U.E. Israelsson, D. Otth, L.L. Simmons, J. Staats, and A. Thompson, “Technical Challenges Involved in Supporting the Lambda Point Experiment,” Cryogenics, 30, September supplement (1990).Google Scholar
- 2.D. Petrac, U.E. Israelsson, and T.S. Luchik, “The Lambda Point Experiment: Helium Cryostat, Cryo-Servicing, Functions and Performance,” Advances in Cryogenic Engineering, 38, (1993).Google Scholar