INFLUENCE OF CURRENT DISTRIBUTION ON QUENCH PROCESS IN NON-INSULATED AC MULTISTRAND SUPERCONDUCTING CABLES

In AC multi-strand superconducting cables, AC quench current is much l ess than that of DC. This AC quench current degradation is caused by A C loss, mechanical damage by cabling, non-uniform current distribution among strands due to self and mutual inductances between strands, and different electrical resistivity at the joint between superconducting strands and current lead. In this paper, the current distribution and the thermal behavior of non-insulated 7- and (6+1)- strand cables app lying AC transport current are analyzed and the influence of contact e lectrical resistivity on the current redistribution and the thermal di ffusion in quench process are investigated.