${\boldsymbol T}_{{\mathbf{cs}}}$ Measurement Result of ITER Toroidal Field Insert Coil Tested in 2016

Abstract

Quantum and radiological science and technology performed a toroidal field (TF) insert coil (TFIC) test in 2016–2017, which was newly developed in 2014 with the ITER TF conductor, in the central solenoid model coil test facility. According to the test program, the TFIC underwent more than 1000 cycles of energization to 68 kA under a 10.8 T background field, which represents the lifetime electromagnetic loads of ITER TF coils. Then, five cycles of warm-up to 290 K and cool-down to a temperature lower than 5 K were also performed. Through the test campaign, the transition of the current sharing temperature ( T cs) was measured under the above energization condition. In parallel, two SULTAN test samples fabricated from the same TF conductor as the TFIC were tested by the similar test sequence to that of the TFIC, and the T cs measurement results of the TFIC and the SULTAN samples were compared. In this paper, the test results mentioned above are reported.