HIGH-POWER MILLIMETREWAVE TRANSMISSION SYSTEMS AND COMPONENTS FOR ELECTRON CYCLOTRON HEATING OF FUSION PLASMAS

At the Institute for Plasma Research at the University of Stuttgart, high-power millimetre wave transmission systems for electron cyclotron heating (ECRH) and current drive (ECCD) of fusion plasmas are developed. Present work concentrates on the 140 GHz, 10 MW CW ECRH system for the stellarator W7-X [1] which is currently built at the Max-Planck-Institute for Plasma Physics (IPP) in Greifswald. There, the millimetre wave power of 10 gyrotrons will be transmitted fully optically via two multi-beam waveguides (MBWG)