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T: Fachverband Teilchenphysik

T 107: Suche nach Dunkler Materie 3

T 107.3: Vortrag

Dienstag, 5. März 2013, 17:15–17:30, HSZ-103

Investigation of Neganov-Luke amplified cryogenic light-detectors for CRESST & EURECA — Andreas Ertl, Achim Gütlein, Jean-Côme Lanfranchi, Andrea Münster, Walter Potzel, Sabine Roth, Daniel Simon, Stephan Scholl, Moritz von Sivers, Raimund Strauss, Stephan Wawoczny, •Michael Willers, Marc Wüstrich, and Andreas Zöller — Technische Universität München, Physik Department E15, James Franck Straße, 85748 Garching

Experiments for the direct detection of dark matter which employ the phonon-light technique like CRESST and the planned experiment EURECA rely heavily on the separation of the different nuclear-recoil bands at low energies for their background suppression. The CRESST experiment uses scintillating CaWO4 crystals as a target in the search for coherent WIMP-nucleon scattering. In the case of electron recoils, about 1% of the energy deposited in a CaWO4 crystal is detected as scintillation light in a separate cryogenic light-detector. For nuclear recoils the scintillation light is further quenched which motivates the need for very sensitive light-detectors. Neganov-Luke amplified cryogenic light-detectors offer a promising way to increase the sensitivity of cryogenic light-detectors by drifting photon induced electrons and holes in an applied electric field and thus amplifying the resulting phonon signal.     This research was supported by the DFG cluster of excellence “Origin and Structure of the Universe”, the DFG “Transregio 27: Neutrinos and Beyond”, the “Helmholtz Alliance for Astroparticle Phyiscs” and the “Maier-Leibnitz-Laboratorium” (Garching).