Erlangen 2026 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 60: Methods in Astroparticle Physics III

T 60.6: Vortrag

Mittwoch, 18. März 2026, 17:30–17:45, KS 00.004

Development of an Integrated Photon Phonon Detector to be used for 0νββ Search — •Ashish Jadhav, Christian Enss, Andreas Fleischmann, Clara Günther, Daniel Hengstler, Sebastian Hilscher, Cagla Mahanoglu, Ioana-Alexandra Nitu, Andreas Reifenberger, Christian Ritter, Daniel Unger, and Loredana Gastaldo — Kirchhoff Institute for Physics, Heidelberg, Germany

The AMoRE project uses scintillating crystals, enriched with ¹⁰⁰Mo, which are operated at millikelvin temperatures to search for 0νββ decay in this isotope of molybdenum. An advantage of using scintillating crystals is that they allow for particle discrimination based on the ratio of light to heat energy released by an event. We present an integrated photon-phonon (P2) detector based on metallic magnetic calorimeters (MMC) operated at 20 mK. The P2 detector design utilizes a 3" Si wafer, with a central area that serves as a photon absorber with a stripline geometry MMC sensor. This central area is connected to the rest of the wafer via seven bridges, which are fabricated using silicon etching techniques. In the outer region of the wafer, three MMC sensors with a double meander geometry are fabricated, on top of which the crystal is resting, to act as phonon detectors. The three independent signals from these phonon detector units would allow a fiducial volume to be defined, while improving particle discrimination based on single- and multi-site events. We discuss the various fabrication challenges and the results of detector characterisation in a dilution refrigerator.

Keywords: Microcalorimeters; Scintillators; Neutrinoless Double Beta Decay; Cryogenic Detectors