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Measuring Contact Thermal Conductances at Low TemperaturesInstrument measures thermal conductance of pressed contacts in liquid helium. Makes measurements automatically as function of force on pairs of brass samples having various surface finishes. Developed as part of effort to determine heat-transfer characteristics of bolted joints on cryogenically cooled focal planes in infrared equipment. Cylindrical chamber hangs from cover plate in bath of liquid helium. Inside chamber rocker arm applies controlled force to samples. Upper sample made slightly wider than lower one so two samples remain in complete contact even under slight lateral misalignment.
Document ID
19870000461
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Salerno, Louis J.
(NASA Ames Research Center, Moffett Field, Calif.)
Kittel, Peter
(NASA Ames Research Center, Moffett Field, Calif.)
Brooks, Walter
(NASA Ames Research Center, Moffett Field, Calif.)
Spivak, Alan L.
(Trans-Bay Electronics, Inc.)
Marks, William G., Jr.
(Lockheed Missiles and Space Co.)
Date Acquired
August 13, 2013
Publication Date
October 1, 1987
Publication Information
Publication: NASA Tech Briefs
Volume: 11
Issue: 9
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
ARC-11693
Accession Number
87B10461
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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