SKM 2023 – scientific programme

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 8: Diamond and related dielectric materials

KFM 8.7: Talk

Wednesday, March 29, 2023, 16:15–16:35, POT 51

Simulation study of LC superconducting microresonators for diamond characterization — •Francesco Mazzocchi, Dirk Strauß, and Theo Scherer — Karlsruhe Institute of Technology KIT IAM-AWP, Eggenstein-Leopoldshafen, Germany

The development of high optical quality, ultra-low losses single crystal diamond windows is paramount for the realization of future nuclear fusion facilities like DEMO, given the foresaw increase in power of microwave ECRH systems. Precise determination of the dielectric characteristics (єr and tanδ) of these innovative materials have so far relied on techniques involving Fabry-Perot microwave open resonators in various configurations. High Q, superconducting thin film resonators can be effectively used to determine dielectric characteristics of extremely low losses materials like single- and poly-crystalline diamond. Their extremely high-quality factors allow for a substantial increase in resolution in the determination of these parameters when compared to state-of-the-art Fabry Perot open resonators. We hereby report a detailed simulation study of the chosen resonators configurations (Lumped Elements and Circular) that lead to the final design of the devices.