Regensburg 2025 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 11: Superconductivity: Poster
TT 11.63: Poster
Montag, 17. März 2025, 15:00–18:00, P4
MMC-Based Photon and Phonon Detector for Scintillating Crystals at mK Temperatures — •Ioana-Alexandra Nitu, Christian Enss, Andreas Fleischmann, Daniel Hengstler, Ashish Jadhav, Cagla Mahanoglu, Andreas Reifenberger, Christian Ritter, and Loredana Gastaldo — Kirchhoff Institute for Physics, Heidelberg University
Scintillating crystals at mK temperatures are used in the search for neutrinoless double beta decay (0 ν β β) and Dark Matter, because they provide the means to discern the interaction of heavy particles, such as α particles, from light ones, such as electrons. The discrimination is achieved by measuring the temperature increase of the crystal and the emitted light simultaneously. This approach is used in the AMoRE experiment where LiMoO4 crystals are employed to search for 0 ν β β.
We present the design concept of an integrated photon and phonon (P2) detector, based on low temperature metallic magnetic calorimeters (MMCs). This detector is to be microfabricated on a 3-inch Si wafer; the central wafer area is used for the detection of the scintillation light, while the outer area contains three double-meander MMC detectors to monitor temperature changes in the crystal. We pursue the optimisation of the design and discuss the challenges in the microfabrication of the photon and phonon detector. Preliminary results are presented and compared to the expected performance.
Keywords: Metallic Magnetic Calorimeter; Microfabrication; Low Temperature Detectors