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Design and performance of the HESSI cryostat

โœ Scribed by R Boyle; S Banks; P Cleveland; P Turin

Book ID
104112538
Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
648 KB
Volume
39
Category
Article
ISSN
0011-2275

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โœฆ Synopsis

The High Energy Solar Spectroscopic Imager (HESSI) spacecraft, to be launched in July 2000, will be used to observe the Sun with the ยฎnest 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 75 K. 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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