Numerical and experimental analysis of AC loss for CFETR CS model coil

The central solenoid （CS） is an important component of China Fusion Engineering Test Reactor, for producing, forming and stabilizing plasma in the superconducting tokamak. It is a complicated work to design and manufacture the large superconducting CS magnet, so it is meaningful to design a central solenoid model coil （CSMC） and analyze its electromagnetic properties in advance. In this paper, the structure, design parameters and magnetic field distribution of the CS model coil are dis- cussed. The peak power of radial and axial turn conductors and time bucket loss are analyzed by using piecewise-lin- ear method. The CSMC AC loss with different Nb3Sn CICCs and AC loss of ITER CS coil are compared. The special electrometric method to measure AC loss of the CS model coil for future reference is presented.