Regensburg 2016 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 6: Focus Session: Applications of Dielectric Materials in Microwave Technology

DF 6.3: Vortrag

Montag, 7. März 2016, 16:00–16:20, H26

Requirements for materials in high power mm-wave systems for Nuclear Fusion applications — •Giovanni Grossetti, Gaetano Aiello, Francesco Mazzocchi, Andreas Meier, Theo Scherer, Sabine Schreck, Peter Spaeh, Dirk Strauss, and Alessandro Vaccaro — Karlsruhe Institute of Technology (Institute of Applied Materials), P.O. Box 3640 76021 Karlsruhe Germany

Material science is a key ingredient for granting the success of a complex project like Nuclear Fusion and a great effort is placed to verify and validate components that will work under very harsh conditions in future fusion power plants.

In this paper we present an overview of the requirements for materials which shall be met for ensuring a high reliability, addressing to a specific system called Electron Cyclotron Heating and Current Drive system (hereafter, ECH&CD). Its goals and objectives are to provide heating and driving current into a Deuterium-Tritium plasma, by injecting localized high power mm-wave for plasma assisted breakdown, ramp up/down, pure heating, impurities control, disruption control and to mitigate plasma instabilities like the sawtooth and the Neoclassical Tearing Mode (NTM).

With respect to materials, the main issues are due to the high neutron flux that can cause material activation, to the high power (MW) of the mm-wave used and to safety, in order to grant Tritium compatibility of components like diamond window assemblies.