Regensburg 2019 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 63: Poster Session: Cryogenic Particle Detectors and Cryotechnique
TT 63.2: Poster
Thursday, April 4, 2019, 15:00–18:30, Poster D
Development of the First Prototype of an MMC-Based Detector for Light Dark Matter Direct Detection — •Arnulf Barth1, Klaus Eitel2, Christian Enss1, Andreas Fleischmann1, Loredana Gastaldo1, Sebastian Kempf1, Bernhard Siebenborn2, and Marc Weber2 — 1Kirchhoff Institute for Physics, Heidelberg University. — 2Institute for Nuclear Physics, Karlsruhe Institute of Technology.
The use of low temperature detectors in the search for the direct interaction of dark matter (DM) particles in a suitable target has opened the possibility to reach high sensitivities even at masses well below 1 GeV/c2 . We present the design for a low-threshold detector optimized for the search of light DM particles based on metallic magnetic calorimeters (MMCs) with a germanium (Ge) crystal as a scattering target. The interaction of a DM particle in the Ge crystal would create two different kinds of excitations: phonons and electron-hole pairs. We discuss the design of a 3-fold MMC system for the measurement of the temperature increase of the Ge crystal, and how the temperature signal can be amplified via the Neganov-Trofimov-Luke effect to ensure a high sensitivity. A first detector prototype has already been developed. We describe the fabrication steps and a first characterization of the performance.