The DUNE vertical drift photon detection system

The Deep Underground Neutrino Experiment (DUNE) is a long-baseline neutrino experiment designed to mainly investigate oscillation parameters, supernova physics and proton decay. Its far detector will be composed of four liquid argon time projection chamber (LArTPC) underground modules, in South Dakota-USA, which detect beam produced at Fermilab, 1300 km away, where near place. second DUNE module, Vertical Drift, single phase LArTPC with electron drift along the vertical axis two volumes 13.5 m x 6.5 60 dimensions separated by cathode plane. charge collection performed anode planes placed top bottom each stacked layers perforated PCB technology electrode strips. photon detection system (PDS) make use large size X-Arapuca tiles distributed over three planes. One plane consist horizontal arrangement double sided installed on high voltage planes, longest cryostat membrane walls. A light active coverage 14.8% 7.4% laterals should allow improvements low energy range that can probed DUNE, especially regarding neutrinos (~10 MeV). We present initial characterization Drift PDS using Monte Carlo simulation preliminary studies its reconstruction capabilities MeV scale. information obtained alone determination interaction region precision least 65 cm for events deposited above 5 reconstructed better than 10%, both center volume.