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STABILITY EVALUATION OF HIGH CRITICAL TEMPERATURE SUPERCONDUCTOR.

[In Japanese. / En japonais.]

Author(s) : ITO D.

Type of article: Article

Summary

IN ORDER TO REVEAL THE CONDUCTOR STRUCTURE FOR A HIGH CRITICAL TEMPERATURE SUPERCONDUCTOR, A STABILITY EVALUATION WAS CONDUCTED. FLUX JUMPING, MINIMUM PROPAGATING ZONE (MPZ) AND FULL STABILIZATION WITH COPPER WERE DISCUSSED, BASED ON PARAMETERS OBTAINED FOR YTTRIUM, BARIUM, COPPER OXIDE COMPOUND (YBCO) AT 77 K. FLUX JUMPING CANNOT TAKE PLACE IN A YBCO CORE WHOSE DIAMETER IS LESS THAN 0.8 MM. THEREFORE, THE CONDUCTOR STRUCTURE DOES NOT HAVE TO BE LIKE A MULTIFILAMENTARY COMPOSITE. THE MPZ FOR YBCO AT 77 K IS NEARLY EQUAL TO THAT FOR NIOBIUM-TITANIUM AT 4.2 K. SPECIFIC HEAT OF YBCO IS 200 TIMES LARGER THAN THAT FOR NIOBIUM-TITANIUM. CURRENT DENSITY IN A FULLY STABILIZED CONDUCTOR WITH A COPPER STABILIZER AT 77 K IS AS LOW AS THAT FOR A NORMAL COPPER CONDUCTOR.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1988-2166
  • Languages: Japanese
  • Source: Cryogenics/ Cryog. Eng. - vol. 22 - n. 6
  • Publication date: 1987
  • Document available for consultation in the library of the IIR headquarters only.

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