Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990cryo...30..166l&link_type=abstract
(NASA, Space Cryogenic Workshop, 8th, Pasadena, CA, July 31, Aug. 1, 1989) Cryogenics (ISSN 0011-2275), vol. 30, March 1990, p.
Astronomy and Astrophysics
Astronomy
1
Cryogenic Cooling, Infrared Telescopes, Liquid Helium, Spaceborne Telescopes, Superfluidity, Cryogenic Equipment, Earth Orbital Environments, Infrared Astronomy, Infrared Astronomy Satellite, Optical Measuring Instruments, Service Life
Scientific paper
The Space Infrared Telescope Facility (SIRTF) is a 1 m class cryogenically cooled observatory for infrared astronomy. The SIRTF cryogenic system has to satisfy the five year mission lifetime requirement as well as to provide sufficient cooling for the science instruments and optical system. A 4000 cu dm superfluid helium dewar has been selected for the current baseline cryogenic system which represents the largest superfluid helium dewar proposed to date for a long lifetime space-borne application. This paper discusses the design and predicted performance of the current cryogenic system, as well as its comparison with IRAS and other space-borne superfluid helium dewars currently under development.
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