Integrated design of an [email protected]/4kW@2K helium cryogenic refrigeration system for CiADS

Abstract Large cryogenic refrigeration systems are the only means to achieve a low-temperature environment for large scientific devices. As an important part of the China Initiative Accelerator Driven System (CiADS), an [email protected]/4kW@2K large helium cryogenic refrigerator is primarily used to cool down superconducting magnetic cryostats. It has been designed by Technical Institute of Physics and Chemistry, Chinese Academy of Sciences at the end of 2023. This paper gives an overview on the performance characteristics and working principle of the [email protected]/4kW@2K large helium cryogenic system. The integrated design of this helium cryogenic refrigerator is introduced. The overall engineering layout design based on the experimental building at Zhongshan Institute of Advanced Cryogenic Technology has been completed. The design result has been used to guideline the engineering and manufacturing phase. Its commissioning tests will be carried out and completed at the end of this year.