Study of standard thermometers and their reproduction of the [lambda] point in liquid helium

Study of standard thermometers and their reproduction of the [lambda] point in liquid helium

Self-calibrated resistance thermometers to be used as standards have been investigated. The heat exchange of the sensor coil with liquid helium per unit coil surface area at 0.3 K is 12 times better than that of a conventional gas-filled thermometer. The exchange is due to Kapitza surface thermal re...

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Veröffentlicht in:Measurement techniques 1999-07, Vol.42 (7), p.689
Hauptverfasser: Astrov, D N, Korostin, S V
Format: Artikel
Sprache:eng
Schlagworte:
Helium
Resistance thermometers
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Zusammenfassung:Self-calibrated resistance thermometers to be used as standards have been investigated. The heat exchange of the sensor coil with liquid helium per unit coil surface area at 0.3 K is 12 times better than that of a conventional gas-filled thermometer. The exchange is due to Kapitza surface thermal resistance. The λ point in liquid helium filling of the thermometer is reproducible to within 0.1 mK.[PUBLICATION ABSTRACT]
ISSN:0543-1972
1573-8906
DOI:10.1007/BF02512093