COMPUTATIONAL COMPARISON OF AC LOSSES IN DIFFERENT KINDS OF HTS COMPOSITE CONDUCTORS

Ac losses of different kinds of available or anticipated I-ITS composi te conductors were computed by using a magnetic diffusion model, The m odel takes into account the real current density-electric field charac teristic of the superconductor and the spatial dependence of the curre nt density. The computation was carried out for self-field losses due to transport current ramps and for magnetization losses in magnet oper ation due to ramping external magnetic field. Special attention was pa id to filament coupling in various conductor models at different ramp rates.