Freiburg 2008 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 86: Niederenergie-Neutrinophysik und Suche nach Dunkler Materie I

T 86.2: Vortrag

Montag, 3. März 2008, 17:05–17:20, KGII-HS 2004

Simulation of the Neutron Background for the CRESST Experiment — •Stephan Scholl, Michael Bauer, Klemens Rottler, Gerhard Deuter, Tobias Lachenmaier, and Josef Jochum — Physikalisches Institut I, Eberhard–Karls–Universität Tübingen

Neutrons present a crucial background in every direct detection dark matter experiment since their signature in a detector cannot be discriminated against a possible WIMP signature. Several possible origins for background neutrons are known; in the scope of this work, we neglect the cosogenic neutrons produced by muons and focus on neutrons from the ambient radioactivity and from internal radio–impurities. Using a GEANT4 code with a improved neutron interaction code, we run simulations of the CRESST setup to obtain quantitative and qualitative information about the expected background seen in the detector modules. The results of these simulations regarding the expected background events in the detectors from the various sources of neutrons will be presented and discussed.

This work is supported by funds of the DFG (Transregio 27: Neutrions and Beyond).