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Design of superconducting current leads.

Author(s) : WESCHE R., FUCHS A. M.

Type of article: Article

Summary

The thermal behaviour of superconducting current leads operating between 4.2 and 293 K has been studied. For operating current densities above 10,000 A/cm2, textured bismuth-2223/silver tapes are an alternative to bismuth-2212 bulk material. Results for these two cases are compared. Use of high-critical temperature superconductors has the potential to reduce the required room temperature refrigerator power to one-fifth of that consumed by a conventional current lead. The operating current density should not exceed 500 A/cm2 for the bismuth 2212 bulk material, whereas values above 10,000 A/cm2 are possible for bismuth-2223/silver tapes. In both cases it has been assumed that the current starts to decay when a voltage of 0.1 volt has been developed across the superconducting part of the current lead.

Details

  • Original title: Design of superconducting current leads.
  • Record ID : 1994-2740
  • Languages: English
  • Source: Cryogenics - vol. 34 - n. 2
  • Publication date: 1994/02

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