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TT: Fachverband Tiefe Temperaturen

TT 18: Superconductivity: Poster

TT 18.62: Poster

Montag, 18. März 2024, 15:00–18:00, Poster C

Large-area MMC-based photon detector operated at mK temperatures — •Ashish Jadhav, Christian Enss, Andreas Fleischmann, Daniel Hengstler, Andreas Reifenberger, Daniel Unger, and Loredana Gastaldo — Kirchhoff Institute for Physics, Heidelberg, Germany

We present the development of a large area, high-energy resolution photon detector based on low temperature metallic magnetic calorimeters (MMCs). The detector is to be the photon detector in a combined photon-phonon (P2) detector to be coupled to molybdate scintillating crystals in the AMoRE experiment. The final P2 detector utilises a 3-inch Si wafer. A central area, weakly coupled to the rest of the wafer is defined to detect visible photons emitted by particle interactions in the scintillating crystal. The outer part of the wafer contains three double-meander MMC detectors as phonon detectors to monitor temperature changes in the crystal resting on gold spacers. The most challenging part is the photon detector based on a stripline pickup coil design. We present the R&D on a large area silicon photon detector with stripline MMC geometry. We discuss the results obtained and the implications of the photon detector for the AMoRE experiment.

Keywords: Metallic Magnetic Calorimeter; Neutrinos; Low temperature detectors; Microfabrication