E. Giguet

TL;DR: In this article, the authors have developed a high-power gyrotron (118 GHz, 140 GHz) in continuous-wave (CW) operation for heating nuclear fusion plasmas for the W7-X stellarator at the IPP Greifswald, Germany.

TL;DR: The first series tube of the gyrotrons for the 10MW electron cyclotron resonance heating system of the stellarator W7-X was tested at Forschungszentrum Karlsruhe (FZK) and yielded a total output power of 0.98 MW, with an efficiency of 31% (without a single-stage depressed collector) in short-pulse operation and 0.92 MW in pulses of 180 s (efficiency of almost 45% at a depression voltage of 29 kV).

TL;DR: In this article, the authors presented a prototype of a 1 MW/CW 140 GHz gyroron for ECRH heating of fusion relevant plasmas. But the performance of the prototype was not evaluated.

TL;DR: In this article, the authors developed a high-power gyrotron with an output power of 1 MW in continuous wave (CW) operation for heating of plasmas used in nuclear fusion research, which was performed under responsibility of FZK Karlsruhe in collaboration with CRPP Lausanne, IPF Stuttgart, IPP Garching and Greifswald, CEA Cadarache and TED Velizy.

TL;DR: In this article, the status of the development of the 140-GHz continuously operating gyrotrons with an output power of 1 MW for the stellarator Wendelstein 7-X was described.