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Quenches in a high-temperature superconducting tape and pancake coil.

Author(s) : LUE J. W., LUBELL M. S., AIZED D., CAMPBELL J. M., SCHWALL R. E.

Type of article: Article

Summary

Stability and normal-zone propagation experiments have been performed on a single-length and double-pancake coils made of bismuth-2223/silver high temperature superconducting tape. No distinctive normal-zone propagation was observed in the single-length conductor tests. Non-uniform critical currents were, however, observed over the length of the conductor. To dramatize the effect on the stability of a magnet wound with this kind of non-uniform conductor, a pancake coil was wound with conductors composed of a two-tape bundle on the inner turns and a single-tape on the outer turns. Quenches of the coil were observed when currents higher than the critical current of the single-tape section were applied and held for more than a few minutes. The coil quenched without a distinctive "normal" front propagation or a large temperature gradient.

Details

  • Original title: Quenches in a high-temperature superconducting tape and pancake coil.
  • Record ID : 1997-0033
  • Languages: English
  • Source: Cryogenics - vol. 36 - n. 5
  • Publication date: 1996/05

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