Cooling Loop Design of Background Magnet of 15T Conductor Performance Test Facility

“China Fusion Engineering Test Reactor (CFETR)” is a next-generation tokamak in China, and superconducting magnets are the cornerstone of the CFETR. Manufacturing its superconducting magnets requires a higher performance Cable-in-Conduit Conductor (CICC), the conductor performance test facility is designed to solve this problem. The purpose of the conductor performance test facility is to develop and test high-performance CICCs. The background magnetic field of the facility is provided by Nb
₃
Sn superconducting magnets, and it is a big challenge to build this background magnet since its maximum magnetic field is 16.5T. The heat load of the background magnet and the friction factor of CICC are analyzed and calculated in this paper, the reasonable parameters of the cooling channels were determined and provided the basic variables for the subsequent engineering design and optimization.