Stability analysis of the conductors for CFETR poloidal field coils

• The stability margin variation rules versus operating conditions were discussed.
• The Tcs of PF conductors at different operating conditions were calculated.
• The typical distributions of conductor temperature were presented and studied.

China Fusion Engineering Testing Reactor (CFETR) is a new tokamak device. The poloidal field (PF) system of CFETR plays an important role in controlling the location and shape of the plasma. The stable operation of the PF system is largely based on the superconductor stability. Therefore, the stability analysis of the PF1, PF4 and DC2 conductors of PF system has been performed. For stability analysis, a mechanical disturbance and an electromagnetic disturbance are applied, respectively. The calculation results of stability margin, current sharing temperature, temperature margin and distribution of conductor temperature are presented and discussed in this paper. The analysis results illustrates that the present design of CFETR PF conductor can satisfy the requirement of safety margin.