Münster 2017 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 55: Suche nach Dunkler Materie 2 (Direkter Nachweis)
T 55.9: Vortrag
Dienstag, 28. März 2017, 18:55–19:10, VSH 19
An alternative approach to Neganov-Trofimov-Luke cryogenic light detectors for Rare Event searches — •Elizabeth Mondragón1, Xavier Defay2, Alexander Langenkämper1, Jean-Côme Lanfranchi1, Erik Lindner1, Andrea Münster1, Corbinian Oppenheimer1, Tobias Ortmann1, Walter Potzel1, Stefan Schönert1, Hong Hanh Trinh Thi1, Andreas Ulrich1, Stephan Wawoczny1, Michael Willers1, and Andreas Zöller1 — 1Technische Universität München, Physik Department Lehrstuhl E15, James-Franck-Straße 1, D-85748 Garching — 2Excellence Cluster Universe, Boltzmannstraße 2, D-85748 Garching
There is a common need in Astroparticle experiments such as direct Dark Matter detection, for detectors with a very low energy threshold. By employing the Neganov-Trofimov-Luke Effect (NTLE) the thermal signal of photons interacting in a semiconductor absorber, operated at cryogenic temperatures, can be amplified by drifting electrons and holes in an electric field. One of the main problems with such detectors arises from an incomplete and unreliable charge collection. In this work a novel electrode geometry designed to improve the charge collection efficiency is investigated in NTLE detectors and first highly promising results will be presented -- this design allows a complete charge collection and provides an outstanding energy resolution. This research was supported by the DFG cluster of excellence Origin and Structure of the Universe and by the Maier-Leibnitz-Laboratorium (Garching).