Abstract
We describe standard resistance thermometers made of a rhodium-iron alloy designed for operation in the temperature range 0.02-2 K. The sensitive element of the thermometer is filled with liquid helium-4 or helium3, which improves the heat exchange by several orders of magnitude. This makes it possible to significantly increase the measuring current and to use conventional technology for precise measurement of resistance.
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Additional information
Translated from Izmeritel'naya Tekhnika, No. 12, pp. 29–31, December, 1995.
This work was done with the support of the International Science Foundation (grant No. J 21100).
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Astrov, D.N., Korostin, S.V. & Polunin, S.P. Thermometer working standard for temperatures below 0.5 K. Meas Tech 38, 1356–1359 (1995). https://doi.org/10.1007/BF00990494
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DOI: https://doi.org/10.1007/BF00990494