Speaker
Description
The Deep Underground Neutrino Experiment (DUNE) is a next-generation neutrino oscillation experiment based on Liquid Argon Time Projection Chamber (LArTPC) technology. The DUNE Far Detectors will be equipped with a Photon Detection System (PDS) consisting of X-ARAPUCA modules to improve neutrino event reconstruction and enable astroparticle studies through triggering of non-beam events.
Doping liquid argon with xenon modifies the scintillation process through energy transfer from argon excimers to xenon excimers, resulting in a shift of the scintillation emission wavelength from 128 nm to 178 nm and improved light response uniformity in large detector volumes.
In this poster, I will present the xenon doping campaign carried out in ProtoDUNE-VD at CERN between March and April 2026, the first test of this technique in a Vertical Drift geometry. Through seven sequential injections, a target concentration of 10 ppm was reached. The main results from the PDS concern the evolution of scintillation signal shape and decay time constants as a function of xenon concentration.