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

• DOI: 10.48550/arxiv.1505.02443
• Publication Date: 2015-01-01
• Authors: José Luis Calvo‐R...; C. Cantini; M. Daniel; U. Degunda; S. Di Luise; L. Epprecht; A. Gendotti; S. Horikawa; L. Knecht; B. Montés; W. Mu; M. García-Muñoz; S. Murphy; G. Natterer; K. Nguyen; K. Nikolics; L. Periale; C. Regenfus; L. Romero; A. Rubbia; R. Santorelli; F. Sergiampietri; D. Sgalaberna; T. Viant; W. Wu
• Keywords: Ton; Full scale

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