Speaker
Description
High-temperature superconducting (HTS) magnets could be a revolutionary technique to achieve commercial fusion energy. The optimal operating temperature for the HTS tokamak magnet system is approximately 20 K, at which the HTS tape has a balanced current capacity and thermal stability. A conduction cooling system with helium gas has been developed and applied on fusion magnets operating at 20 K. Liquid hydrogen with a temperature of 13-21 K, shows a great potential on higher cooling efficiency and cost reduction compared to helium gas, making it a promising cooling option for large-scale HTS magnets. This study presents a conceptually design on HTS tokamak magnet system with liquid hydrogen cooling system. The feasibility of conducting cooling system with hydrogen is studied by comparing with its traditional counterpart with helium gas. The results show that the conduction cooling method with liquid hydrogen has comprehensive advantages on efficiency, cooling performance and cost reduction. It is a promising technique for future HTS fusion magnets.
