AC V-I characteristics of Ag sheathed PbBi2223 tapes up to 10 kHz: phenomena and interpretations

The self-field AC V-I characteristics of PB2223 silver sheathed superconducting tapes were measured at 9 different positions across the tape at 77 K and 65 K between 47 Hz and 10 kHz. The significant difference found between the centre and the edge was interpreted as the result of the complex geometry of tapes. The implication of this difference to the measurement of the total losses is discussed. Considerable contributions from eddy current losses in the silver sheath were also found for frequencies above 200 Hz.<
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