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Thermal conductance of pressed brass contacts at liquid helium temperaturesAn apparatus has been designed and fabricated which will measure the thermal conductance of pressed contacts at liquid helium temperatures as a function of applied force, with surface finish as a parameter. The apparatus is automated and was used to measure thermal conductance at temperatures from 1.5 to 6.5 K at applied forces up to 700 N for brass sample pairs having surface finishes from 0.1 to 1.6 micron rms. The experimental data were found to fit a simple power law where the thermal conductance is given by k = alpha T exp n, where k is the thermal conductance, T is the absolute temperature, and alpha and n are empirically determined constants.
Document ID
19860060526
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Salerno, L. J.
(NASA Ames Research Center Moffett Field, CA, United States)
Kittel, P.
(NASA Ames Research Center Moffett Field, CA, United States)
Brooks, W. F.
(NASA Ames Research Center Moffett Field, CA, United States)
Spivak, A. L.
(Trans-Bay Electronics, Inc. Richmond, CA, United States)
Marks, W. G., Jr.
(Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1986
Publication Information
Publication: Cryogenics
Volume: 26
ISSN: 0011-2275
Subject Category
Engineering (General)
Accession Number
86A45264
Distribution Limits
Public
Copyright
Other

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