Freiburg 2008 – scientific programme
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T: Fachverband Teilchenphysik
T 87: Niederenergie-Neutrinophysik und Suche nach Dunkler Materie II
T 87.5: Talk
Tuesday, March 4, 2008, 17:45–18:00, KGI-HS 1098
Application of the Neganov-Luke Effect for Scintillation Light Detection — •Christian Isaila1, Christian Ciemniak1, Chiara Coppi1, Franz v. Feilitzsch1, Achim Gütlein1, Josef Kemmer2, Jean-Come Lanfranchi1, Andreas Pahlke2, Sebastian Pfister1, Walter Potzel1, Sabine Roth1, Wolfgang Westphal1, and Florian Wiest2 — 1Technische Universität München, Physik Department E15, James-Franck-Str., 85748 Garching, Germany — 2KETEK GmbH, Hofer Strasse 3, 81737 München, Germany
The phonon-light technique employed in the Dark Matter experiment CRESST (Cryogenic Rare Event Search with Superconducting Thermometers) requires very sensitive light detectors for an efficient discrimination of the background induced by electron recoils. The threshold of the light detectors can be improved by drifting the electron-hole pairs generated by the scintillation photons by an applied electric field. Thus, additional phonons are created leading to an amplification of the thermal signal. For an efficient charge collection, substrates with low trap densities are required. For this purpose and for electrical decoupling the TES is glued onto the drift device. Results from measurements with Neganov-Luke amplification using the composite detector design will be presented. This work has been supported by funds of the DFG (SFB 375, Transregio 27: "Neutrinos and Beyond"), the Munich Cluster of Excellence ("Origin and Structure of the Universe"), the EU networks for Cryogenic Detectors (ERB-FMRXCT980167) and for Applied Cryogenic Detectors (HPRN-CT2002-00322) and the Maier-Leibnitz-Laboratorium (Garching).