抄録
In JAERI, as one of superconducting toroidal coil development works for a tokamak fusion machine, the Cluster Test Program is under way. The first Test Module Coil (TMC-I) in this program has been constructed in 1982. The TMC-I, whose winding inner diameter is 60cm, has been fabricated with a double pancake winding method using a reacted multifilamentary Nb3Sn conductor. Up to now, experiments of the TMC-I were carried out on cooling-down, current charge, stability, manual dumping and out-of-plane force. The TMC-I was stably operated in 11.1T with the current of 6kA and the current density in the winding of 30A/mm2. A total stored energy was 46MJ at 11.1T. 192cm length normal zone, generated by heat-input in the innermost turn, recovered spontaneously to superconducting state in 6.3s. From these results, it was demonstrated that a multifilamentary Nb3Sn conductor is applicable to large-current and large-size coils.
