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Magnetic and Transport AC Losses in HTS Roebel Cable

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7 Author(s)
Lakshmi, L.S. ; Ind. Res. Ltd., Lower Hutt, New Zealand ; Long, N.J. ; Badcock, R.A. ; Staines, M.P.
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We present results for magnetic losses in a five strand HTS Roebel cable with 2 mm wide insulated strands. The loss as a function of field is compared to the isolated strands and an un-insulated cable. The loss as a function of the angle of the applied field to the cable normal is found to scale simply with the normal component of field. The dependence of the loss on the frequency of the applied field is presented and a small intrinsic frequency dependence of the superconductor is observed. The frequency dependence of the loss in a cable coupled by copper bridges is presented. The coupling loss is found to follow the Debye form at low fields. Transport AC losses in HTS Roebel cable with different strand insulation thicknesses are found to vary with the vertical separation of strands.

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Applied Superconductivity, IEEE Transactions on  (Volume:21 ,  Issue: 3 )