Testing of the Euratom LCT coil in the toroidal arrangement of the International Fusion Superconducting Magnet Test Facility without external pulsed fields (standard-I) and with them (standard II) and an extended single-coil test

In this test, the coil reached (in stable operation) a field of 9 T at 140% of rated current. It reached the short-sample values of the strands used in the cable. The coil was operated up to 8 T with and without poloidal field transients in a toroidal configuration. The mass flow rate was reduced by a factor of 5 compared with the design value without any visible impact on stability. Averaged AC losses (winding, 14 W; case, 7 W) were measured under Large Coil Task (LCT)-specified poloidal field pulses, and the findings agreed with those of the short-sample measurements. The coils mechanical properties, which behaved as theoretically predicted, are also reported. All results obtained are thought to demonstrate that the applied technology has achieved reliable engineering standards.< >