LTCalcoli has contributed to a new study focused on improving the electromagnetic modelling of the thermal insulation (TI) system in the Wendelstein 7-X stellarator. The research was prompted by a fast plasma current decay event observed in 2018, occurring in just ~1 ms—far quicker than originally anticipated—leading to much higher induced eddy currents in key components. 

Because the TI plays a crucial role in separating the cryogenic magnet system from warmer structures, a more accurate assessment was essential. A refined EM model was developed, including plasma current sources, superconducting coils, TI panels and tubes, and the plasma vessel. Preliminary analyses showed EM loads up to seven times higher than design assumptions, and the enhanced model now provides more reliable force predictions across different decay scenarios. 

The results will support upcoming mechanical evaluations and contribute to safer, more robust operation of W7-X. This work highlights LTCalcoli’s expertise in high-fidelity simulations for complex fusion systems. 

Referenced link: https://doi.org/10.1016/j.fusengdes.2023.113492