Design of distribution system for cryogenic subcooled research platform

To improve the efficiency of the Experimental Advanced Superconducting Tokamak (EAST) subcooled helium cryogenic system, the Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), is manufacturing a cryogenic subcooled research platform (CSRP). The CSRP system consists of a helium refrigerator with a capacity of 1200 W/4.5 K + 720 W/3 K and a distribution system that provides a supercritical forced flow cooling by using a helium circulation pump and 3 K subcooled helium generated using a two-stage cold compressor (CC) for the superconducting magnet and other devices. The distribution system not only distributes refrigeration to the cold components, but also serves as a test platform for some key equipment, such as the helium pump, CC, and venturi flow meter.