Orateur
Dr
Valentin KOZLOV
(Karlsruhe Institute of Technology)
Description
One of the most promising particle candidates for DM is the supersymmetric neutralino or more generally a weakly interacting massive particle (WIMP). The expected interaction rate of WIMPs in direct search experiments is below 0.01 events / (kg day), thus rising up the importance of having a detailed understanding of potential background. Ambient and muon-induced neutrons constitute a prominent background component. Detailed studies carried out by the Edelweiss collaboration in this respect will be presented. This activity includes dedicated calibrations with neutron sources, monitoring the neutron flux with He3 detectors and measurements with a neutron counter based on Gd-loaded liquid scintillator as well as corresponding MC simulations with full event topology. The impact of the neutron background on current Edelweiss data-taking as well as for next generation experiments such as EURECA will be discussed. This work is in part supported by the German Research Foundation (DFG) through the Transregional Collaborative Research Center SFB-TR27 as well as by the EU contract RII3-CT-2004-506222 and the Russian Foundation for Basic Research (grant No. 07-02-00355-a).
Author
Dr
Valentin KOZLOV
(Karlsruhe Institute of Technology)
Co-auteur
collaboration EDELWEISS
(France, Germany, Russia, United Kingdom)
