Würzburg 2018 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 20: Neutrinophysik I
T 20.4: Vortrag
Montag, 19. März 2018, 16:50–17:05, Z6 - SR 2.012
Multi-Pixel Photon Counters for the detection of liquid xenon scintillation light — •Katharina Witzmann1, Michael Wagenpfeil1, Tobias Ziegler1, Judith Schneider1, Ako Jamil2, Jürgen Hößl1, Gisela Anton1, and Thilo Michel1 — 1Friedrich-Alexander-Universität Erlangen-Nürnberg, ECAP — 2Yale University, Connecticut, USA
The future nEXO experiment will search for neutrinoless double beta decay with a single-phase time projection chamber, filled with liquid xenon enriched in 136Xe, by detecting scintillation light and secondary electrons. The vacuum ultraviolet (VUV) scintillation light of liquid xenon will be detected with Silicon Photomultipliers (SiPMs) which are also referred to as Multi-Pixel Photon Counters (MPPCs). Important criteria to achieve the desired energy resolution of 1 % at the Q-value (2457.8 keV) are a photon detection efficiency of at least 15 % for the liquid xenon scintillation light and a probability of less than 20 % to obtain correlated avalanches such as cross-talk or after-pulsing. In this contribution we will present results of characterization measurements with commercial MPPCs named VUV3 and VUV4 carried out by the nEXO-collaboration using differing experimental setups.