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Cryogenic helium 2 systems for space applicationsTwo cryogenic systems are described which will provide cooling for experiments to be flown on Spacelab 2 in the early 1980's. The first system cools a scanning infrared telescope by the transfer of cold helium gas from a separate superfluid helium storage dewar. The flexible design permits the helium storage dewar and transfer assembly to be designed independent of the infrared experiment. Where possible, modified commerical apparatus is used. The second cryogenic system utilizes a specially designed superfluid dewar in which a superfluid helium experiment chamber is immersed. Each dewar system employs a porous plug as a phase separator to hold the liquid helium within the dewar and provide cold gas to a vent line. To maintain the low vapor pressure of the superfluid, each system requires nearly continuous prelaunch vacuum pump service, and each will vent to space during the Spacelab 2 flight.
Document ID
19790023151
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Urban, E.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Katz, L.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Hendricks, J.
(Alabama Univ.)
Karr, G.
(Alabama Univ.)
Date Acquired
August 9, 2013
Publication Date
October 1, 1978
Publication Information
Publication: ESA Spacecraft Thermal and Environ. Control Systems
Subject Category
Spacecraft Design, Testing And Performance
Accession Number
79N31322
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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