Wuppertal 2015 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 28: Niederenergie Neutrinophysik II
T 28.5: Vortrag
Montag, 9. März 2015, 17:45–18:00, I.12.01 (HS 30)
Development of phonon and photon detectors for rare events searches using scintillating crystals — •Loredana Gastaldo1, Clemens Hassel1, Sebastian Hendricks1, Sebastian Kempf1, Andreas Fleischmann1, Christian Enss1, Matias Rodrigues2, Martin Loidl2, David Gray2, Xavier-Francois Navick2, and Yong-Hamb Kim3 — 1Kirchhoff Institute for Physics, Heidelberg University, Heidelberg, Germany — 2Commissariat à l’énergie atomique, Saclay, France — 3Korean Research Institute of Standards and Science, Daejeon, Rep. of Korea
The use of scintillating crystals in cryogenic experiments searching for neutrinoless double beta decay and for direct interaction of dark matter particles allows for an efficient background reduction thanks to particle discrimination. We develop phonon and photon detectors based on metallic magnetic calorimeters (MMCs)to perform the simultaneous measurement of heat and light generated upon the interaction of a particle in a scintillating crystal. The design values for the energy resolution and signal rise-time are: Δ EFWHM < 100 eV and τ < 200 µs for the phonon detector while for the photon detector we expect Δ EFWHM < 5 eV and τ < 50 µs. Proof-of-principle experiments have been already performed within the AMoRE and LUMINEU projects by coupling first prototypes of MMC-based photon and phonon sensors to 100Mo-based scintillating crystals, CaMoO4 and ZnMoO4. We discuss the design and the fabrication of these detectors and present recent results.