Dresden 2020 – scientific programme

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 6: Diamond

KFM 6.1: Talk

Tuesday, March 17, 2020, 09:30–09:50, TOE 317

ECRH systems for nuclear fusion reactors — •Dirk Strauß, Theo Scherer, Sabine Schreck, Peter Späh, Andreas Meier, and Gaetano Aiello — Karlsruher Institut für Technologie KIT-IAM-AWP ; D-76344 Eggenstein-Leopoldshafen

A typical ECRH system in fusion devices includes gyrotrons as millimeter wave beam sources, transmission lines with a diamond window as confinement barrier and antennas to inject the beam into the plasma. The electron-cyclotron resonance condition at the required position can be achieved by angular steering or frequency tuning. Apart from heating and current profile shaping the small wavelength allows to suppress MHD instabilities as neoclassical tearing modes. The state of the art ECRH is presented and different variants are discussed with a focus on ultra-low-loss CVD diamond windows.