Dresden 2017 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 71: Superconductivity: Cryodetectors and Cryotechnique
TT 71.8: Talk
Thursday, March 23, 2017, 17:00–17:15, HSZ 201
Development of a combined photon and phonon detector for rare-event experiments — •Clemens Hassel1, Felix Ahrens1, Christian Enss1, Andreas Fleischmann1, Loredana Gastaldo1, Sebastian Kempf1, Yong-Hamb Kim2, Wonsik Yoon2, Martin Loidl3, Xavier-Francois Navick3, and Matias Rodrigues3 — 1Kirchhoff-Institute for Physics, Heidelberg University, Germany. — 2IBS Center for Underground Physics, Daejeon, Rep. of Korea — 3CEA, Saclay, France.
Scintillating crystals in cryogenic experiments searching for a direct interaction of dark matter particles and for the neutrinoless double beta decay, as in AMoRE or LUMINEU, allow for an efficient active background reduction due to particle mass discrimination. This is achieved by the simultaneous measurements of heat and light generated by the interaction of a particle in the scintillating crystal. We are developing phonon and large area photon detectors based on metallic magnetic calorimeters (MMCs) to readout both types of excitations. We will present the design for a photon detector P1 with an expected energy resolution of Δ EFWHM < 5 eV and a signal rise time of τ < 50 µ s and discuss its fabrication and first experimental results. Furthermore we will present the design and the fabrication of the integrated photon and phonon detector P2, with a light detector inspired by P1 and three phonon sensors with Δ EFWHM < 100 eV and τ < 200 µ s on the same chip. This allows for a very efficient readout, a minimum of material for support structures and further background reduction by position sensitive phonon signals.