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T: Fachverband Teilchenphysik

T 32: Dunkle Materie 2

T 32.2: Talk

Monday, March 24, 2014, 17:00–17:15, P11

Design and comissioning of the Mainz Xenon dual-phase TPC — •Bastian Beskers, Pierre Sissol, Melanie Scheibelhut, Cyril Grignon, Uwe Oberlack, and Rainer Othegraven — Johannes Gutenberg Universität Mainz

Dark Matter detectors based on dual-phase xenon Time Projection Chambers (TPC) have been setting the most stringent limits in the past decade (Xenon10, Xenon100) and are still leading the field (LUX). Bigger detectors in the ton scale (XENON1T) based on the same detection principles are in construction phase and in the multi-ton scale (DARWIN) are being envisioned. Despite the success of those experiments, the behaviour of xenon for low energy recoils (few keV) is still not well understood. With the MainzTPC, a small 3D position-sensitive dual-phase xenon TPC, we will measure the xenon response in the low energy regime with better precision than previous experiments and study the liquid xenon scintillation pulse shape. We report on the perfomance of the large area avalanche photo diodes (APD) used to detect xenon scintillation light (VUV) and the comissioning of the xenon dual-phase TPC.