Thermo-mechanical Analysis of the Structure Components of 15 T Magnet in Super-X Facility

As a sub-task of the comprehensive research facility for fusion technology (CRAFT), the superconducting conductor experiment testing platform (Super-X for short) can evaluate the performance of future superconducting conductors with large section dimension under fusion reactor operating conditions. The direct current magnet providing the background magnetic field 15 T is a crucial component of the Super-X facility. In this paper, the final design of the background magnet is described firstly. Its innovative preload structure is adopted to solve the problem of limited space. The length of the titanium (Ti) alloy boom used to hang the magnet is about 6 m, which can effectively reduce the heat leak. Next, a finite element model of the background magnet containing the structure component is established. Then, electromagnetic analysis is conducted to obtain the magnetic field distributions and Lorentz loads. Finally, 3D global mechanical analysis is performed, and the detailed mechanical robustness of the background magnet is illustrated and discussed. The analytical results indicate that the present background magnet design satisfies mechanical criteria.