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Performance evaluation of carbon resistance thermometers at cryogenic temperatures.

[In Japanese. / En japonais.]

Author(s) : NAKAJIMA R., SATO K., KAI M., et al.

Type of article: Article

Summary

Resistance vs temperature relations of 200 carbon resistors, widely used for cryogenic temperature measurements, were investigated in the range between liquid helium temperature and 20 K. Obtained data are statistically evaluated, and it is shown that the difference of the carbon resistor's lot affects the resistance value at the cryogenic temperatures. Four empirical formulas for the resistance vs temperature relation proposed by other researchers are evaluated. The authors propose a new empirical equation by applying Clement's equation. It is found that the three undecided coefficients, A, B and K of the equation can be calculated from the resistance at 4.2 K alone, thus enabling one-point calibration at liquid helium temperature. Resistance changes caused by ten times temperature cyclings from room temperature to liquid helium temperature are also measured.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1993-0154
  • Languages: Japanese
  • Source: Cryogenics/ Cryog. Eng. - vol. 27 - n. 2
  • Publication date: 1992
  • Document available for consultation in the library of the IIR headquarters only.

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