Regensburg 2019 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 8: Diamond I (joint session KFM/HL)

KFM 8.2: Vortrag

Dienstag, 2. April 2019, 09:50–10:10, PHY 5.0.20

Development of Diamond Windows Diagnostics for fusion applications — •Theo Scherer, Aurelian Tesniere, Gaetano Aiello, Francesco Mazzocchi, Andreas Meier, Sabine Schreck, and Dirk Strauß — Karlsruhe Institut für Technologie KIT, IAM-AWP, D-76344 Eggenstein-Leopoldshafen, Hermann-von-Helmholtz-Platz 1, Germany

The future nuclear fusion power plants will require Electron Cyclotron Heating and Current Drive (ECH&CD) systems to heat up and stabilize the plasma inside the vacuum vessel. One of the key components of such systems is the Chemical Vapor Deposition (CVD) diamond window. The purpose of this device is to act as vacuum and tritium boundary while providing a high microwave transparency with minimal reflectivity. Although suited for high power microwave operation, the windows shall be internally monitored in order to properly ensure the ECH system efficiency and safety. In this paper, the latest assessment study on a set of diagnostics to be part of the window assembly is shown. The required diagnostics include arc and tritium detection, microwave stray radiation (perpendicular to the main beam and generated by cracks in the windows), pressure and disk temperature measurements. To accommodate the diagnostics previously mentioned, a new design for the window housing was developed.