AC Loss Analysis of Central Solenoid Model Coil for China Fusion Engineering Test Reactor

Central solenoid (CS) is one of the most important components of China Fusion Engineering Test Reactor (CFETR), which is designed by the China National Integration Design Group. It is a time-consuming work such a complex CS magnet is designed; therefore, it is necessary to design central solenoid model coil (CSMC) and to determine its electromagnetic properties beforehand. In this paper, we present a CSMC that is suitable for studying the electromagnetic properties. The design parameters, the magnetic field distribution, and the ac loss of the CSMC were carefully considered for future baseline design. Based on the piecewise-linear method, the peak power and the time bucket losses were calculated. Furthermore, the ac loss of the different types of Nb3Sn conductor-based coil was obtained and compared. Finally, the proposed test method for measuring the ac loss of the CSMC was described.