Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 4: Detectors I (Scintillators)

T 4.5: Vortrag

Montag, 31. März 2025, 17:45–18:00, VG 0.110

Development of an integrated photon and phonon detector for use with scintillators — •Ashish Jadhav, Christian Enss, Andreas Fleischmann, Daniel Hengstler, Cagla Mahanoglu, Ioana-Alexandra Nitu, Christian Ritter, Andreas Reifenberger, Daniel Unger, and Loredana Gastaldo — Kirchhoff Institute for Physics, Heidelberg University

The AMoRE project searches for 0νββ decay in ¹⁰⁰Mo using scintillating crystals coupled with metallic magnetic calorimeters (MMCs) operated at 20mK. The current setup utilizes separate phonon and photon detectors to simultaneously measure the crystal’s temperature rise and emitted light. We present the development of an integrated photon-phonon detector (P2) for a potential improvement in energy resolution and background suppression. In the P2 design, the central part of a 3" silicon wafer is separated from the rest of the wafer by trenches produced through silicon etching, leaving only six narrow bridges for thermal connection. This central part serves as a photon detector with the MMC sensor having stripline geometry and thermally isolated from the rest of the wafer by trenches produced through silicon etching techniques. The outer region of the wafer hosts three MMC units that are coupled to the scintillating crystal to monitor temperature changes. This configuration would help study a position-dependent signal shape, improving event discrimination for multi-site events. The primary challenges in developing a P2 detector are the fabrication of the thermally isolated photon absorber area and the reliable, support-free mounting of the scintillating crystal onto the wafer.

Keywords: Neutrinos; Metallic magnetic calorimeters; Low temperature detectors