Helium Cryogenic Control System Design for CSMC Testing in CRAFT

This paper focuses on the 1kw/4.5K helium refrigerator applied to Central Solenoid Model Coil (CSMC) test magnets under the Comprehensive Research Facility for Fusion Technology (CRAFT). The structure of CSMC and the process of cryogenic distribution system are briefly introduced. It mainly introduces the design of the control system under the CODAC (COntrol, Data Access and Communication) architecture through the analysis of the specific operation conditions required for testing the magnets including of the redundant control network, interlock function, and communication configuration and OPI (Operator Interface), etc. Through structural analysis and research on typical cryogenic applications, the purpose is to standardize cryogenic control logic design and program development, and improve the readability, scalability and maintainability of large-scale programs. System commissioning is scheduled to begin in July 2022.