Thermal analyses of the mm-waveguide cooling concepts for the ITER electron cyclotron upper launcher first confinement system

Available commercial solutions for the cooled waveguide are incompatible with the FCS, which will be subject to higher heat fluxes and shall comply with ITER SIC-1 requirements. Therefore a dedicated cooling system must be designed. This study presents the results of the thermal mechanical analyses of two different cooling concepts, and concludes the most suitable concept for the final Upper Launcher FCS system design.