Analysis of 1.8 K Superfluid Helium Cryogenic System for Cooling Superconducting Magnets

The widespread application of superconducting magnets has greatly promoted the technical development of cryogenic engineering technology. For the engineering requirements of 100 kW @ 4.5 K ultra-large helium cryogenic system and 1.8K superfluid helium cryogenic system of future “China Fusion Engineering Test Reactor (CFETR)”, it is planned to construct a 250 W @ 1.8 K superfluid helium cryogenic system. This paper introduces the benefits of superfluid helium for cooling superconducting magnets, simplified flow chart and key equipment of 1.8 K superfluid helium cryogenic system.