First results on light readout from the 1-ton ArDM liquid argon detector for dark matter searches

Details First results on light readout from the 1-ton ArDM liquid argon detector for dark matter searches First results on light readout from the 1-ton ArDM liquid argon detector for dark matter searches

2010-09-19

arxiv.org/abs/1009.3641v2

JINST 5:P11003,2010

Physics

Instrumentation and Detectors

14 pages, 10 figures, v2 accepted for publication in JINST

Scientific paper

10.1088/1748-0221/5/11/P11003

ArDM-1t is the prototype for a next generation WIMP detector measuring both the scintillation light and the ionization charge from nuclear recoils in a 1-ton liquid argon target. The goal is to reach a minimum recoil energy of 30\,keVr to detect recoiling nuclei. In this paper we describe the experimental concept and present results on the light detection system, tested for the first time in ArDM on the surface at CERN. With a preliminary and incomplete set of PMTs, the light yield at zero electric field is found to be between 0.3-0.5 phe/keVee depending on the position within the detector volume, confirming our expectations based on smaller detector setups.

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