Fusion Science & Technology · 2009 · 12 citations · 8 references
Continuous Wave10-Mw Ecrh PlantElectrical EngineeringTransmission LossesEngineeringEcrh SystemMillimeter Wave TechnologyRadio FrequencyMicrowave TransmissionAntennaFusion PowerComputational ElectromagneticsSynchrotron RadiationBeamformingMicrowave EngineeringElectromagnetic CompatibilityWireless Propagation
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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H. P. Laqua, V. Erckmann, H. J. Hartfuß et al. · Physical Review Letters · 1997 · 223 citations
Accessible Plasma Densities, O-x-b Mode Conversion, Engineering +13
Electron Cyclotron Heating for W7-X: Physics and Technology
V. Erckmann, Peter Brand, H. Braune et al. · Fusion Science & Technology · 2007 · 190 citations
EU Megawatt-Class 140-GHz CW Gyrotron
M. Thumm, S. Alberti, A. Arnold et al. · IEEE Transactions on Plasma Science · 2007 · 87 citations · Full text