Compared with the traditional high-frequency AC induction heating technology, the high-temperature superconducting DC induction heating technology can greatly improve the diathermy processing efficiency of low resistivity, non-ferromagnetic metal materials. Thermal stability of superconducting magnet is the key to ensure the safe and stable operation of high temperature superconducting induction heating system. Large diameter superconducting magnet is mostly cooled by immersion in cryogenic medium, but there is no precedent for conductive cooling of such magnet in the world. In this paper, we built a conducting cooling experimental platform for superconducting magnet. Temperature sensors arranged in different positions of the magnet are used to monitor the temperature distribution of each part in real time. According to the experimental results, the cooling circuit is optimized and re-tested. And then the conduction cooling experiment of large diameter superconducting magnet is carried out. The experimental results show that the optimized cooling method can sufficiently cool the superconducting magnet.
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