Speaker
Description
Several new controlled nuclear fusion systems are under development in China. To achieve the higher magnetic field intensity and to minimize the final size as well, the high-Tc superconducting magnets are adopted. There are a variety of rigorous requirements on the associated cryogenic system expected to provide 600 W at around 20 K, of which high-efficiency and high-reliability are especially stressed. A novel cryogenic system based on the pulse tube cryocooler which features high-reliability and high-efficiency in the aimed operating temperature range is proposed, and how to significantly enhance the gross cooling capacity of the system becomes one of the key points. This paper presents optimization design and performance improvement approach about the cryocooler and then describes in detail the system integration of the novel cryogenic system with the high-Tc superconducting magnets. The expected cooling performance of the cryogenic system used in the developing controlled nuclear fusion system is also evaluated.
