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

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...

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Bibliographic Details
Published in:Applied physics letters 2012-09, Vol.101 (10)
Main Authors: Zhang, Min, Kvitkovic, J., Kim, Jae-Ho, Kim, C. H., Pamidi, S. V., Coombs, T. A.
Format: Article
Language:English
Subjects:
Alternating current
Coils
Finite element method
Mathematical analysis
Superconducting tapes
Superconductivity
Transport
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Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4749275