Certain practical applications of YBCO coated conductors (CC) involve superconducting tapes wound in coils. In such a configuration the superconducting tape is arranged as closely packed turns, leading to an increase of the magnetic field generated by the current in the tapes and, consequently, a significant increase in the AC losses, with respect to an ‘isolated’ tape. In order to predict and reduce the refrigeration requirements of applications, it is therefore very important to be able to quantify the magnitude of such AC losses, both experimentally and by means of numerical calculations.
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Grilli, F., Ashworth, S.P. Transport AC Losses of YBCO Coated Conductor Coils. MRS Online Proceedings Library 1001, 1104 (2007). https://doi.org/10.1557/PROC-1001-M11-04