Speaker
Dr
Klaus Eitel
(Karlsruhe Institute of Technology)
Description
EDELWEISS-2 is the second phase of a Ge-bolometer experiment located in the underground laboratory Laboratoire Souterrain de Modane (LSM, France). New cryogenic detectors with an improved background rejection (interleaved electrodes design, Phys. Lett. B681 (2009) 305) have been successfully implemented. A continuous operation of ten of these bolometers at LSM together with an active muon veto shielding has been achieved in 2009/2010. First results based on an effective exposure of 144 kg•d taken in 2009 have been published recently (Phys. Lett. B687 (2010) 29) and more than 300 kg•d have been acquired up to May 2010. The published data correspond to an improvement in sensitivity of almost 20 compared to EDELWEISS-1. We present and discuss the latest bolometer data including the identification of muon-induced background events in LSM.
This work is supported in part by the German Research Foundation (DFG) through its collaborative research center SFB-TR27 ("Neutrinos and Beyond"), by the French Agence Nationale pour la Recherche (ANR) and the Russian Foundation for Basic Research (grant No. 07-02-00355-a).
Primary author
Dr
Klaus Eitel
(Karlsruhe Institute of Technology)
