Thermo-mechanical analysis of RMP coil system for EAST tokamak

• Thermal design requirements for EAST RMP coils are summarized.
• Cooling parameters based on both theoretical and numerical solutions are determined.
• Compromise between thermal design and structural design is made on number of turns.
• Thermo-mechanical calculations are made to validate its structural performance.

Resonant magnetic perturbation (RMP) has been proved to be an efficient approach on edge localized modes (ELMs) control, resistive wall mode (RWM) control, and error field correction (EFC), RMP coil system under design in EAST tokamak will realize the above-mentioned multi-functions. This paper focuses on the thermo-mechanical analysis of EAST RMP coil system on the basis of sensitivity analysis, both normal and off-normal working conditions are considered. The most characteristic set of coil system is chosen with a complete modelling by means of three-dimensional (3D) finite element method, thermo-hydraulic and thermal-structural performances are investigated adequately, both locally and globally. The compromise is made between thermal performance and structural design requirements, and the results indicate that the optimized design is feasible and reasonable.