STABILITY ANALYSIS OF ADVANCED SUPERCONDUCTORS FOR HELICAL DEVICES

Cable-in-conduit superconductors are considered as a conductor for fut ure helical devices. A cable-in-conduit superconductor consists of mul ti-strand cable and conduit. The stability of multi-strand superconduc ting cable is investigated in consideration of the current redistribut ion between strands. We studied basically the current redistribution p henomena in two-strand cable by experiment, and have developed the num erical method to simulate the current redistribution phenomena of the cable. As a result of a numerical analysis, it was found that the curr ent redistribution phenomena depend on coolant conditions. In this pap er, effects of the coolant condition on the current redistribution phe nomena and the stability of the superconducting cable will be discusse d.