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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 1: Focus: Diamond Technology and Electronics (joint session KFM/DS/HL)

KFM 1.4: Vortrag

Montag, 16. März 2020, 11:20–11:40, HSZ 105

Preliminary study of diamond based Kinetic Inductance Detectors — •Francesco Mazzocchi, Dirk Strauß, and Theo Andreas Scherer — Karlsruhe Institute of Technology (IAM-AWP), Hermann Von Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen

Kinetic Inductance Detectors (KIDs) have proven themselves as a very versatile cryogenic detector technology capable of applications in various fields due to their flexibility of design, sensibility and ease of production. We have recently proposed a polarization sensitive Lumped Elements KID as sensor for an innovative polarimetric diagnostics based on quantum cascade lasers (QCL) for application in the nuclear fusion. Each detector unit is composed by 4 pixels arranged at the vertices of a square, each pixels being sensible to only one polarization direction. The current system is based on niobium nitride (NbN) superconductor over High Resistivity Silicon (HRSi) substrate. Such material delivers good performances but its relatively high dielectric constant and loss tangent lead to increased substrate losses. Using a transparent substrate may improve this aspect and also the radiation resistance of such devices. Diamond is the substrate of choice, being a material already widely studied and used in the fusion environment as high power microwave window, due its outstanding optical and mechanical performances. In this work we present the preliminary design study and simulations for a diamond based Kinetic Inductance Detector with both single and poly-crystalline diamond (SCD/PCD) substrates taken into account.