Saturday, 3F-02, 8:40-8:50

Critical Currents and AC Losses in Coated Conductors

Takanobu Kiss

T. Kiss, K. Higashikawa, A. Matsekh, K. Imamura, K. Abiru, Y. Honda, and M. Inoue Dept of EESE, Kyushu University, Fukuoka 819-0395, Japan

Numerical simulation on AC loss analysis has been carried out based on the critical state model as well as taking into account nonlinear E-J characteristics as a function of magnetic field and temperature within the framework of the percolation transition model. Influence of multiple tape stacks, magnetic field dependence and the effect of J_c improvement of magnetization losses in a high field magnet have been discussed based on the numerical analysis. Influence of spatial J_c nonuniformity has also been studied by the magnetic microscopy and its influence on AC losses in multi-filamentary tape has been discussed.

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