Long length calorimetric measurement of AC losses of Bi-2223 with external field oriented perpendicular to the tape width.

AC applications are projected to be a significant market for HTS conductor. The ac magnetic fields perpendicular to the wide face of Bi-2223 conductor (or parallel to the crystallographic c-axis of the oxide superconductor) are responsible for a significant portion of the total loss in ac coils. ASC has developed a calorimetric apparatus which can measure long lengths of conductor in a uniform continuous perpendicular field. This apparatus provides accurate measurement of interfilament or interstrand coupling losses. Calorimetric measurements from long lengths of twisted multifilamentary conductor are presented.