Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 22: Search for Dark Matter 1

T 22.8: Vortrag

Montag, 21. März 2022, 18:05–18:20, T-H35

S1-based position reconstruction in dual phase time projection chambers — •Jaron Grigat — Albert-Ludwigs-Universität, Freiburg, Deutschland

Most particle interactions inside liquid xenon dual phase time projection chambers (LXe-TPCs) create two light signals. Besides the prompt scintillation light (S1), electrons from the interaction site are drifted in an electric field to the gas phase of the TPC. There, they create a delayed proportional scintillation signal (S2). Normally, the position in the x-y-plane is reconstructed from the hit pattern of the S2 signal on the top photosensor array. The depth of the interaction can be calculated from the time delay between S1 and S2. In this talk, we explore the possibility to reconstruct the 3D position by only looking at the S1 signal using machine learning techniques. We discuss possible applications of this additional information and show how this method can help us to characterize the electric field inside the XENONnT TPC.