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Two level controller for liquid nitrogen supply and its application.

[In Japanese. / En japonais.]

Author(s) : YAMAKAWA H., TERASAWA T., SHEN G. H., YUYAMA J.

Type of article: Article

Summary

With an additional circuit and a comparator of an OP amplifier, two-level controller keeping the liquid nitrogen between an upper and a lower level was developed. A commercial silicon diode was shown to be able to be used as a level sensor with good interchangeability, high speed response and 300 deg C heat resistance. A liquid nitrogen supply system of the controller and an auto pressurized vessel was constructed. The system could supply stably and reliably to a sorption pump even when consumption of liquid nitrogen was not constant at cooling down from room temperature.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1994-0014
  • Languages: Japanese
  • Source: Cryogenics/ Cryog. Eng. - vol. 27 - n. 5
  • Publication date: 1992
  • Document available for consultation in the library of the IIR headquarters only.

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