Concurrent operation of 10 gyrotrons at W7-X experience and improvement opportunities
Max-Planck-Institut für Plasmaphysik, Garching and Greifswald, Germany
Published online: 3 September 2018
At the stellarator Wendelstein 7-X (W7-X) Electron Cyclotron Resonance Heating (ECRH) is the main heating system for steady-state operation and was the only available heating system during the operation phase OP1.2a in 2017. The ECRH, equipped with 10 operational 140 GHz gyrotrons , was used for different tasks at W7-X such as wall conditioning, controlled plasma start-up from the neutral gas up to steady state plasma control and different heating scenarios such as X2-mode and O2-mode heating as well as current drive (ECCD). The operational experiences and improvement opportunities of the ECRH plant will be discussed.
© The Authors, published by EDP Sciences, 2018
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