Residual magnetic field measurement of BSCCO and YBCO HTS tapes by a Hall probe

TALLOULI Mohamed, 孫建, 渡辺裕文, 浜辺誠, 河原敏男, 筑本知子, 山口作太郎（中部大）；小田部荘司（九工大）； SHYSHKIN Oleg （V. N. Karazin Kharkov 国立大）； CHARFI-KADDOUR Samia （Tunis El Manar 大）

Abstract:Damages can happen to a HTS power cable caused by overcurrent or fault conditions. Quick interruption of current is necessary in a fault case and a better understanding of effects of the current cut off time on HTS tapes is required to restart the operation. In this study a 100A transport current is applied to BSCCO and YBCO tapes. After cut off the current we measured the magnetic field profiles of each HTS tapes. We compare the magnetic field profiles between the fast and slow cut off the current. The cut off time is 0.15 ms for the fast cut and 100 s for the slow one. The current density profiles are obtained by solving the inverse problem from magnetic field measurements. Our results show that the magnetic field profiles are quite different from each experimental conditions and HTS tapes due to the hysteresis of HTS tape.