MEASUREMENT OF THE AC POWER LOSS OF (BI,PB)(2)SR2CA2CU3OX COMPOSITE TAPES USING THE TRANSPORT TECHNIQUE

The transport self-field ac loss voltages of (Bi,Pb)(2)Sr2Ca2Cu3Ox (Bi-2223) multifilamentary tapes depend strongly on the voltage lead configuration. We have measured the loss voltage as a function of the measuring circuit loop size defined by the voltage leads and the tapes for well-defined lead geometries. The loss signal was found to reach a limiting value when the length of the loop transverse to the tape was several times the tape width. This limiting voltage represents the ''true'' self-field ac loss as predicted by new theoretical analysis. (C) 1995 American Institute of Physics.