Aachen 2019 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 31: Direkte Suche nach Dunkler Materie II
T 31.6: Vortrag
Dienstag, 26. März 2019, 17:15–17:30, H09
Construction of a Radon Emanation Chamber — •Daniel Baur — Hermann-Herder-Straße 3
Liquid xenon-based experiments are currently leading the search for WIMP dark matter. Their dominant electronic recoil background in the energy region of interest are naked beta decays of 214Pb, a daughter from 222Rn. Consequently, the precise monitoring of the surface emanation of 222Rn is required for the successful development of next-generation dark matter experiments with a multi-ton xenon target such as DARWIN. The emanation can be measured in a radon emanation chamber, where the daughters of 222Rn are collected electrostatically on a silicon PIN diode and the subsequent alpha decays are detected. The status of the construction of such a detector in Freiburg is presented as well as first measurement results.