TEST RESULTS OF THE DPC-TJ, A 24 kA-40 A/mm2SUPERCONDUCTING TEST COIL FOR FUSION MACHINES

A high–current–density large forced–cooled (NbTi) 3 Sn superconducting test coil for fusion machines named DPC–TJ was developed and tested. This test coil is the first coil adopting the new winding concept which enables high coil-rigidity together with high current–density. The coil was investigated in detail, and its designed rated state of 24 kA–12 T–40 A/mm 2 was confirmed to be obtainable by the equivalent condition test. Through this development work, it was verified that superconducting coils for future large fusion machines could be designed with high current-density.