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T: Fachverband Teilchenphysik

T 107: Suche nach Dunkler Materie 3

T 107.2: Vortrag

Dienstag, 5. März 2013, 17:00–17:15, HSZ-103

The EURECA Active Shielding Concept — •Geertje Heuermann — Karlsruher Institut für Technologie, Institut für Kernphysik, Postfach 3640, 76021 Karlsruhe

EURECA (European Underground Rare Event Calorimeter Array) is a future experiment for the direct search of dark matter using cryogenic detectors with a total mass of up to 1 ton. The goal of the EURECA experiment is to reach a sensitivity of 10⁻¹¹ pb or below for the cross section of spin-independent WIMP-nucleon interaction. This requires an unprecedented suppression of the background in the nuclear recoil band down to < 1 event/ton/year in the region of interest. External and internal shielding together with an active veto system have to be installed to suppress multiple sources of background. Among them, a potential source are high-energy muons which induce particle showers including energetic neutrons. At present, an 8 m diameter water tank, suggested as a massive shield around the cryostat, is expected to be instrumented with several tens of PMTs detecting Cherenkov light from muons and muon-induced cascades. In this talk we focus on the specific design of the water Cherenkov detector for EURECA and show first results of Monte Carlo studies optimizing its setup.
This work is supported in part by the German ministry of science and education (BMBF Verbundforschung Astroteilchenphysik 05A11VK2).