Design and performance of the HESSI cryostat.

Details Design and performance of the HESSI cryostat. Design and performance of the HESSI cryostat.

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cryo...39..969b&link_type=abstract

Cryogenics, Vol. 39, No. 12, p. 969 - 973

Computer Science

Performance

1

Cryostats: Space Instrumentation

Scientific paper

The High Energy Solar Spectroscopic Imager (HESSI) spacecraft, to be launched in July 2000, will be used to observe the Sun with the finest angular and energy resolutions ever achieved from a few keV to hundreds of keV. The spacecraft will use an array of nine germanium (Ge) detectors, each 7.1 cm in diameter and 8.5 cm long, operating at 75K. The detectors are mounted in a cryostat on a common coldplate, and cooled by a small Stirling-cycle cryocooler. This paper describes the design of the cryostat, special accommodations for the Ge detectors, interfaces with the cryocooler, and thermal performance of the engineering test unit.

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