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ENHANCEMENT OF THE STABILIZATION OF SUPERCONDUCTING MAGNETS BY HYDROSTATICALLY PRESSURIZED HELIUM II.

[In Japanese. / En japonais.]

Author(s) : KOBAYASHI H.

Type of article: Article

Summary

HELIUM II UNDER PRESSURES FROM 1 ATM TO SATURATED VAPOUR PRESSURE AND CONSTANT BATH TEMPERATURE WAS INVESTIGATED AS A POSSIBLE COOLANT FOR SUPERCONDUCTING MAGNETS. THE COOLING STRENGTH IS DESCRIBED IN TERMS OF A CRITICAL FREQUENCY AT WHICH THE PEAK TRANSPORT CURRENTS CORRESPONDING TO SUCCESSIVE CONSTANT VOLTAGE PULSES DECREASE ABRUPTLY DUE TO A BREAKDOWN OF SUPERFLUIDITY. MAXIMUM FREQUENCY WAS FOUND WITH A HYDROSTATIC PRESSURE HEAD OF ABOUT 2 METERS. THIS ALLOWS THE USE OF ORDINARY CRYOSTATS WHILE RETAINING THE EFFICIENCY OF SATURATED HELIUM II SYSTEMS. HELIUM II DOES NOT GIVE FULL STABILIZATION IN THE CLASSICAL SENSE, BUT IS A PROMISING COOLANT FOR PULSE MAGNETS OR META-STABILIZED DIRECT CURRENT MAGNETS.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1990-0058
  • Languages: Japanese
  • Source: Cryogenics/ Cryog. Eng. - vol. 23 - n. 6
  • Publication date: 1988
  • Document available for consultation in the library of the IIR headquarters only.

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