Cryogenic Oscillating Heat Pipe for Conduction-Cooled Superconducting Magnets

The cryogenic oscillating heat pipe (OHP) is considered as a convenient thermal link between the crycooler head and the superconducting magnet due to the employment of flexible capillary tube. In this paper, a cryogenic OHP using nitrogen as the working fluid is fabricated. The copper blocks connecting with the evaporator of the cryogenic OHP are used as a mock-up superconducting magnet, and a heating sheet is attached on the copper blocks to simulate the heat generation of the superconducting magnet system during the operation process. The cooling down processes and the operation characteristics of the cryogenic OHP at the different condenser temperature are investigated. The results show that the cryogenic OHP has not only large cooling capacity during the cooling down process, but also excellent heat transfer performance during the operation process.