Study of Xenon-Doped Liquid Argon Scintillation Light Properties in ProtoDUNE Single Phase

Doping liquid argon (LAr) with a small concentration of xenon (Xe) is a known technique to modify the scintillation light properties. The energy deposited by charged particles crossing the detector is transferred from argon eximers to xenon eximers, through the process Ar2*->ArXe*->Xe2*, which emits photons with a shorter distribution in time and a longer wavelength. These effects are expected to enhance the light yield, the light transport, and timing performance in large-scale detectors. In this work, we conduct a detailed study using Deep Underground Neutrino Experiment (DUNE) single-phase data to develop and refine analysis methods for characterizing Xe-doping effects. The framework established here will be applied to the upcoming ProtoDUNE-Vertical Drift (VD) xenon-doping run to investigate the impact of Xe doping on photon detection performance, with a view toward evaluating the potential implementation of Xe doping in the DUNE far detector.