Status of ArDM-1t: First observations from operation with a full ton-scale liquid argon target

Abstract

ArDM-1t is the first operating ton-scale liquid argon detector for direct search of Dark Matter particles. Developed at CERN as Recognized Experiment RE18, the experiment has been approved in 2010 to be installed in the Spanish underground site LSC (Laboratorio Subterraneo de Canfranc). Under the label of LSC EXP-08-2010 the ArDM detector underwent an intensive period of technical completion and safety approval until the recent filling of the target vessel with almost 2 ton of liquid argon. This report describes the experimental achievements during commissioning of ArDM and the transition into a stage of first physics data taking in single phase operational mode. We present preliminary observations from this run. A first indication for the background discrimination power of LAr detectors at the ton-scale is shown. We present an outlook for completing the detector with the electric drift field and upgrade of the scintillation light readout system with novel detector modules based on SiPMs in order to improve the light yield.

arXiv comment16 pages, 18 figures

References in corpus (4)

• Systematic Uncertainties in the Analysis of the Reactor Neutrino Anomaly
• Radiopurity assessment of the tracking readout for the NEXT double beta decay experiment
• Radiopurity assessment of the energy readout for the NEXT double beta decay experiment
• Status of the ArDM Experiment: First results from gaseous argon operation in deep underground environment

Cited by in corpus (7)

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• Light dark matter in a minimal extension with two additional real singlets
• On the Evaluation of Silicon Photomultipliers for Use as Photosensors in Liquid Xenon Detectors
• Measurement of the attenuation length of argon scintillation light in the ArDM LAr TPC