1. Investigation of the muon-induced background of the EDELWEISS-II experiment
- Author
-
Chantelauze, Astrid, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Blaise Pascal - Clermont-Ferrand II, and Johannes Blümer
- Subjects
[PHYS.PHYS.PHYS-ATM-PH]Physics [physics]/Physics [physics]/Atomic and Molecular Clusters [physics.atm-clus] ,Bruit radioélectrique ,Particules (physique nucléaire) -- Thèses et écrits académiques Matière sombre (astronomie) -- Thèses et écrits académiques Neutrons -- Thèses et écrits académiques Muons ,Collisions (physique nucléaire) - Abstract
The EDELWEISS experiment aims to detect WIMPs, weakly interactive massive particles, which could possibly amount for all or part of the dark matter in the universe. It measures the energy released by nuclear recoils produced by the elastic collision of a WIMP in an ordinary matter target. Due to the very small interaction cross-section of WIMP with nucleons, which leads to an extremely low expected event rate (< 1 event/kg/year), and due to the relatively small deposited energy (< 100 keV), the nuclear recoil signal of WIMP events can be mimiced by neutrons coming from natural radioactivity or induced by muons. The present work is devoted to study the muon-induced background. Performances of the muon veto of the EDELWEISS-II experiment are presented and detection of muons and showers discussed. The first muon veto-bolometers coincidences has been performed on two 4-month physics runs in 2007 and 2008 and leads to a result of 0:043 § 0:015 coinc/kg/d for a recoil energy ER
- Published
- 2009