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DESIGN CONSIDERATIONS FOR HIGH CRITICAL TEMPERATURE CERAMIC SUPERCONDUCTORS.

Author(s) : COLLINGS E. W.

Type of article: Article

Summary

THE FLUX-JUMP STABILITY AND CRYOSTABILITY OF MODEL CONDUCTORS BASED ON THE CERAMIC SUPERCONDUCTOR YBACUO ARE CONSIDERED. THE HIGHER SPECIFIC HEAT OF MATERIALS AT 80 K THAN AT 4 K GUARANTEES A MUCH GREATER ADIABATIC FLUX-JUMP STABILITY. IN FACT, THE CERAMIC SHOULD BE IMMUNE TO ADIABATIC FLUX JUMPING IN APPLIED FIELDS OF LESS THAN ABOUT 5 T. THE HIGH THERMAL CONDUCTIVITY OF YBACUO AT 80 K IS PARTLY RESPONSIBLE FOR RELIEVING THE CUSTOMARY REQUIREMENT FOR 100 MICROMETER FILAMENTS. DEPENDING ON THE ASSUMED CRITICAL CURRENT DENSITY, DYNAMICALLY FLUX-JUMP STABLE FILAMENTS CAN BE MANY MILLIMETRES THICK. THE GENERAL CONDITIONS FOR CRYOSTABILITY IN COMPOSITE CONDUCTORS ARE INVESTIGATED. IT IS POINTED OUT THAT ALTHOUGH THICK CONDUCTORS WILL SATISFY THE ELECTRICAL REQUIREMENTS FOR STABLE DIRECT CURRENT OPERATION, FINE FILAMENTARY SUBDIVISION WILL ALWAYS BE NEEDED TO REDUCE ALTERNATING CURRENT HYSTERETIC LOSSES.

Details

  • Original title: DESIGN CONSIDERATIONS FOR HIGH CRITICAL TEMPERATURE CERAMIC SUPERCONDUCTORS.
  • Record ID : 1989-1694
  • Languages: English
  • Source: Cryogenics - vol. 28 - n. 11
  • Publication date: 1988

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