Calorimetry automation in the 0.4–3 K range: use of the NBS superconductive fixed point device and the specific heat of copper

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DOIResolve DOI: http://doi.org/10.1063/1.1134138
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TypeArticle
Journal titleReview of scientific instruments
ISSN0034-6748
Volume46
IssueDecember 12
Pages16701675; # of pages: 6
AbstractOperation of an automatic data acquisition system, with an on-line minicomputer, in the 0.4–3 K temperature range is described and illustrated by results obtained on pure copper. The temperature scale was set up using both 3He vapor pressure thermometry and the NBS superconductive fixed point device. On the basis of specific heat measurements on pure Cu and Cu alloys, it appears that the temperatures assigned by the NBS to the superconducting transition temperatures of cadmium and zinc are too close. The required adjustment is within their assigned uncertainty limits.
Publication date
LanguageEnglish
AffiliationNRC Institute for National Measurement Standards; National Research Council Canada
NoteAuthor affiliated with the NRC Division of Physics at time of publication
Peer reviewedNo
Identifier10012217
NRC number3822
NPARC number8897189
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Record identifier6f532603-b57d-4dd2-8667-6361cbf56a3b
Record created2009-04-22
Record modified2016-05-09
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