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AC losses of filamentary HTS twisted filament round wires and flat tapes

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6 Author(s)
Darmann, F. ; High Temp. Supercond. Dev. Fac., MM Cables, Eveleigh, NSW, Australia ; Zhao, R. ; McCaughey, G. ; Apperley, M.
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Samples of multifilamentary Bi-2223/Ag/alloy twisted filament tapes and Z stack round wires, consisting of untwisted and twisted stacks (or z-arrays) of flat filaments have been prepared. It was found that twist pitches of less than 10 mm may be incorporated into multifilament tapes while maintaining the Jc at 20 kA/cm/sup 2/. The self-field AC loss has been investigated at low frequencies up to 100 Hz. The round wire was found to exhibit isotropic electromagnetic properties.

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Applied Superconductivity, IEEE Transactions on  (Volume:9 ,  Issue: 2 )