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DEVELOPMENT OF A 50 KILOVA SUPERCONDUCTING COIL WITH AN ULTRA-FINE MULTIFILAMENTARY SUPERCONDUCTOR. 1. COIL PRODUCTION AND TESTING. 2. ALTERNATING CURRENT LOSSES.

[In Japanese. / En japonais.]

Author(s) : SHIMIZU E., ITO D.

Type of article: Article

Summary

THE AUTHORS DEVELOPED AND BUILT TWO 50 KILOVA COILS AND OPERATED THEM AT 50 HERTZ IN ORDER TO STUDY THE STABILITY AND ALTERNATING CURRENT LOSSES IN THE COILS. ULTRA-FINE 42-CORE CABLES WERE USED FOR THE SUPERCONDUCTING COILS. TO AVOID WIRE MOTION AND MAINTAIN SUITABLE HELIUM COOLING THE CABLE WAS EMBEDDED IN COIL FORMERS MADE OF FIBRE-REINFORCED PLASTIC. THE APPARENT NORMAL ZONE PROPAGATION VELOCITY IS MUCH GREATER THAN THE CALCULATED ADIABATIC VALUE. THE CRITICAL CURRENT DENSITY IN THIS SUPERCONDUCTOR WAS UNEXPECTEDLY SMALL BUT THE HYSTERESIS LOSS WAS LARGER THAN THAT CALCULATED ON THE BASIS OF THE CRITICAL CURRENT DENSITY RESULT. THE MEASURED ALTERNATING CURRENT LOSSES WERE VERY SMALL. THE RESULTS SUGGEST THE POTENTIAL USE OF A BARE STRAND CABLE IN CONSTRUCTING ALTERNATING CURRENT COILS.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1989-0835
  • Languages: Japanese
  • Source: Cryogenics/ Cryog. Eng. - vol. 23 - n. 4
  • Publication date: 1988
  • Document available for consultation in the library of the IIR headquarters only.

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