Analyzing a Cooling Experiment of a Prototype Thermosiphon System for a Single Crystal Silicon Ingot Growing Magnet

A thermosiphon system is a method of cooling large-scale superconducting magnet systems; the system functions by circulating cryogen through a cooling channel. In this paper, a small-scale prototype thermosiphon system is designed for a single crystal ingot growing magnet. The design is based on liquid and gaseous helium circulation. The cooling performance of the system is analyzed experimentally. The experiment is conducted with different heat loads to investigate the effects of different magnet heat loads such as ac losses. The prototype system showed satisfactory cooling performance when the heat load was under 0.75 W. However, an unstable system pressure was reported when the heat load was over 0.75 W. Based on the result, a conceptual revised topology of the prototype system is suggested as a possible solution to the unstable pressure.