Process Design of Cryogenic Distribution System for CFETR CS Model Coil

The superconducting magnet of Central Solenoid (CS) model coil of China Fusion Engineering Test Reactor (CFETR) is made of Nb3Sn/NbTi cable-in-conduit conductor (CICC), and operated by forced-flow cooling with a large amount of supercritical helium. The cryogenic circulation pump is analyzed and considered to be effective in achieving the supercritical helium (SHe) circulation for the forced-flow cooled (FFC) CICC magnet. A distributed system will be constructed for cooling the CFETR CS model coil. This paper presents the design of FFC process for the CFETR CS model coil. The equipment configuration, quench protection in the magnet and the process control are presented.