Operation Experience of the Wendelstein 7-X High-Temperature Superconductor Current Leads

The fusion device Wendelstein 7-X is a modular stellarator, which went into operation at the Greifswald branch of the Max-Planck-Institut für Plasmaphysik in December 2015. The main component is the superconducting magnet system that consists of 50 nonplanar and 20 planar coils, 14 high-temperature superconductor (HTS) current leads (CLs), and more than 100 superconducting bus bars. The HTS CLs wi...