SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 39: Neutrinos, Dark Matter VI

T 39.6: Vortrag

Dienstag, 21. März 2023, 18:15–18:30, POT/0006

Light signal correction for the XENONnT experiment — •Johanna Jakob for the XENON collaboration — Institut für Kernphysik, WWU Münster

XENONnT, the latest stage of the XENON dark matter project, is currently taking science data with the science goals to detect WIMP-nucleus scattering and to search for other rare events. The detector is a dual-phase time projection chamber (TPC) filled with 8.5 tonnes of liquid xenon. The detector side walls reflect the scintillation light caused by energy deposition in the detector, which is registered at the top and bottom by photomultiplier arrays. Free electrons, additionally created by the energy deposition, are drifted to the gaseous phase at the top of the detector where they create a secondary scintillation light pulse by electroluminescence. The combination of light and charge signal allows for a 3-dimensional position reconstruction of the recorded events and a differentiation between electron and nuclear recoil events. This talk focuses on the light signal reconstruction, which requires a correction of the position dependent light collection efficiency. Based on calibration data from internal radioactive sources, light collection efficiency maps are derived and applied to the light signals.

This work is supported by BMBF under contract 05A20PM1 und by DFG within the Research Training Group GRK 2149.