Application of inverse problem solution to the dynamic analysis of the internal current of bulk high-T-c superconductor

Various magnetic levitation systems using oxide superconductors are developed as strong pinning forces are obtained in melt-processed bulk. Lots of studies have especially been made on superconducting magnetic bearings, and the analysis of flux creep phenomena is important for developing them. It is important to determine the dynamic behavior of internal current distribution in the superconductor. Moreover, other applications including magnetic shields, superconducting motors, etc. also need similar kind of analysis to resolve the irreversible magnetization or hysteresis characteristics. This paper propose the application of inverse problem solution to examine the dynamic analysis of the internal current of bulk high-T-c superconductor. The method infers and determines the internal superconducting current from the exterior flux density distribution. The paper reported the applicability of the proposed analysis method. (C) 2001 Published by Elsevier Science B.V.