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Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 7: Direkte Suche nach Dunkler Materie I

T 7.7: Vortrag

Montag, 25. März 2019, 17:35–17:50, H09

Characterization of the Heidelberg Xenon (HeXe) TPC — •Florian Jörg, Guillaume Eurin, Natascha Rupp, Dominick Cichon, and Teresa Marrodán-Undagoitia — Max-Planck-Institut für Kernphysik Heidelberg

Dual phase liquid xenon time projection chambers (TPCs) are among the most sensitive detector technologies used for rare event searches, such as for example direct dark matter detection. To ensure the optimal response of the detector, it is crucial to maintain the chemical purity of the xenon at a high level. New techniques aimed at the background reduction for these experiments, employ chemicals to improve the surface properties of different materials, which are used for the construction of such detectors. In order to guarantee the compatibility of these techniques with the high xenon purity demand of a dual phase TPC, it is mandatory to test these techniques under the operational conditions of such a detector. The Heidelberg Xenon (HeXe) dual phase liquid xenon TPC is dedicated to investigate the possible effects of different surface treatment techniques onto the liquid xenon purity. In this talk, the measuring system and its performance will be described. Results from a first characterization of the charge and light response of the system at different drift fields using a 83mKr source will be presented. Uncertainties in the drift field were evaluated with a three dimensional FEM simulation using COMSOL Multiphysics.

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