Quench stability simulation of the CFETR CSMC at 47 kA

The Central Solenoid Model Coil (CSMC) is a critical component of the China Fusion Engineering Test Reactor (CFETR), responsible for generating a peak magnetic field of up to 12 T This is essential for ensuring the proper operation of the fusion reactor's confinement system. To verify the stable operation of the CSMC magnet, a quench stability analysis is conducted on each coil of the CSMC when the peak magnetic field is reached. This paper provides a detailed study of the magnetic field distribution of the CSMC under the operating current of 47 kA. Additionally, the CryoSoft code THEA is used to estimate the minimum quench energy (MQE) and temperature margin for each coil of the CSMC magnet system under electromagnetic disturbances, corresponding to the maximum magnetic field condition. A comparison of the minimum quench energy and temperature margin of the five coils is made, leading to the identification of the most susceptible coil to quench. Additional analyses further reveal that the disturbance length and its axial location along the cooling channel significantly affect local quench sensitivity.