14-17 September 2021
America/Los_Angeles timezone

Optical Modeling and Position Reconstruction for DarkSide-20k

15 Sep 2021, 14:15
Signal reconstruction and identification (analysis methods, simulations) Signal Reconstruction (2C)


Michael Poehlmann (University of California, Davis)


DarkSide-20k is a next-generation direct dark matter search experiment under construction at the Gran Sasso National Laboratory (LNGS) in Italy. The core of the detector is a two-phase liquid argon time projection chamber designed to probe WIMP interactions down to the neutrino floor. To ensure the 200 ton-year exposure has zero instrumental backgrounds, low-radioactivity underground argon is used as the detector medium. Backgrounds from detector surfaces are primarily rejected through fiducialization, which requires accurate reconstruction of event vertices. Monte Carlo simulations of interactions within the detector have been used to study the position reconstruction resolution of DarkSide-20k. In this talk, I present the detector optical model and discuss the performance of machine learning-based position reconstruction algorithms on simulated DarkSide-20k datasets.

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