Home / Store / Journals / Electronic Articles / Fusion Science and Technology / Volume 55 / Number 1 / Pages 16-22
V. Erckmann; W. Kasparek; G. Gantenbein; F. Hollmann; L. Jonitz; F. Noke; F. Purps; M. Weissgerber; W7-X ECRH Teams at IPP Greifswald, FZK Karlsruhe, IPF Stuttgart
Fusion Science and Technology / Volume 55 / Number 1 / Pages 16-22
Format:electronic copy (download)
Electron cyclotron resonance heating (ECRH) is the main heating system for W7-X. A 10-MW ECRH plant with continuous wave (cw) capability is under construction to support the W7-X operation, which aims at demonstrating the steady-state capability of stellarators at reactor-relevant plasma parameters. The ECRH system consists of ten radio-frequency (rf) modules with 1 MW power each at 140 GHz. The rf beams of the individual gyrotrons are transmitted in common to the W7-X torus via open multibeam mirror lines. The losses of individual components of the transmission system were measured with both low- and high-power methods. Integrated full-power, cw measurements of the long-distance transmission losses are reported and compared to theoretical design estimates.
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