Model of DC HTS cable with effect of increasing of critical current under longitudinal magnetic field

Vyatkin Vladimir, Otabe Edmund Soji, Wada Jun, Tanabe Kenjiro, Kiuchi Masaru, Matsushita Teruo （九工大）

Abstract:The critical current density in the longitudinal magnetic field is known to be increased for low temperature superconducting tapes and wires. Increasing of critical current vs. external magnetic field takes place because the magnetic field and current create the force free configuration during longitudinal magnetic field. For high temperature superconductors this situation is also expected. In present stage, it was found that critical current density of HTS tape increases with angular dependence. The critical current in case of external magnetic field parallel to the current is larger than when external magnetic field perpendicular to the current. According the experimental data about angular and field dependence of critical current in HTS tape it was built the model of multilayer cable with different angle between tape direction and axis of the cable. In frame of this model, it was found the optimal configuration of the cable provide the maximal total critical current. Also it was calculated the influence of external longitudinal magnetic field to the critical current of the multilayer superconducting cable.