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Réduction des pertes en champ magnétique alternatif dans des rubans multifilamentaires à haute Tc en Bi(2223)/Ag à l'aide de barrières à haute résistivité.

Reduction of alternating magnetic field losses in high-Tc multifilament Bi(2223)/Ag tapes by high resistive barriers.

Auteurs : KWASNITZA K., CLERC S., FLUKIGER R., et al.

Type d'article : Article

Résumé

Flat high-Tc multifilament tapes with an Ag matrix have very large coupling current losses in perpendicularly applied 50 Hz magnetic fields. By the application of ceramic isolating BaZrO3- and SrZrO3 barriers around the filaments the authors could be reduce at 77 K the coupling current decay time constant to 1.5 ms, leading to a significant loss reduction at 25 Hz and a noticeable loss reduction at 50 Hz. The coupling loss maximum for small delta-beta values was shifted for a stack of six tapes to 110 Hz and for a single tape to 180 Hz. By a further combined application of several loss reduction measures the application of high-Tc superconductors in 50 Hz magnets will be possible in the next future.

Détails

  • Titre original : Reduction of alternating magnetic field losses in high-Tc multifilament Bi(2223)/Ag tapes by high resistive barriers.
  • Identifiant de la fiche : 2001-2628
  • Langues : Anglais
  • Source : Cryogenics - vol. 39 - n. 10
  • Date d'édition : 1999

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