Alternating current loss of second-generation high-temperature superconducting coils with magnetic and non-magnetic substrate

Min Zhang, J. Kvitkovic, Jae Ho Kim, C. H. Kim, S. V. Pamidi, T. A. Coombs

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

It is widely believed that the second-generation high-temperature superconducting (2G HTS) tapes with magnetic substrates suffer higher transport loss compared to those with non-magnetic substrates. To test this, we prepared two identical coils with magnetic and non-magnetic substrates, respectively. The experimental result was rather surprising that they generated roughly the same amount of transport loss. We used finite element method to understand this result. It is found that, unlike in the single tape where the magnetic field-dependent critical current characteristic can be neglected and the effect of magnetic substrate dominates, the magnetic field-dependent critical current characteristic of 2G tape plays as an equally important role as magnetic substrate in terms of HTS coils.

Original languageEnglish
Article number102602
Number of pages4
JournalApplied Physics Letters
Volume101
Issue number10
DOIs
Publication statusPublished - 3 Sep 2012

Keywords

  • second-generation high-temperature superconducting (2G HTS) tapes
  • magnetic substrates
  • transport loss
  • finite element method

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