SKM 2023 – scientific programme

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 8: Diamond and related dielectric materials

KFM 8.3: Talk

Wednesday, March 29, 2023, 14:40–15:00, POT 51

Technical application of CVD Diamond windows in fusion reactor heating systems. — •Peter Späh — KIT, Institute for applied materials, Karlsruhe

The application of CVD diamond windows in fusion experiments often comes along with challenging design requirements. Diamond windows and associated components must be protected properly from harsh environmental conditions. This is particularly the case for the future demonstration power plant reactor (EU DEMO), where sensitive applications shall operate under severe conditions in terms of heat, mechanical loads and radiation.

For the EU DEMO, an EC Heating and Current Drive System (ECH&CD) is under development, where CVD diamond windows together with microwave reflectors (mitre-bends and mirrors), corrugated waveguides, waveguide switches, shutter valves and confinement barrier feed-throughs, will be precisely integrated into a millimetre wave power transmission system. The entire system is installed into massive launching components and reactor building structures. The design takes into account mechanical integrity, dissipation of heat by powerful cooling systems, radiation shielding and the capability to be serviced and maintained by remote handling procedures.

This talk presents the conceptual design and integration of the ECH&CD launching system into the EU DEMO fusion power plant.