Speaker
Description
The Deep Underground Neutrino Experiment (DUNE) is a next-generation long-baseline neutrino experiment designed to address the fundamental open questions in neutrino physics. Its Far Detector, located 1300 km from the neutrino source and 1.5 km underground, will comprise four massive liquid argon time projection chamber (LArTPC) modules, one of which will be equipped with the Vertical Drift (VD) technology. This module is also instrumented with a Photon Detection System (PDS) to collect the argon scintillation light, providing the interaction time for non-beam neutrinos and improving timing resolution and calorimetric reconstruction. In the VD configuration, half of the photon detectors are installed on the high-voltage cathode to increase coverage and improve spatial uniformity. To enable operation in this cryogenic and high-voltage environment using only non-conductive materials, innovative Signal-over-Fiber (SoF) and Power-over-Fiber (PoF) technologies have been developed to transmit signals and deliver power optically. These technologies, together with the overall detector concept, have been validated at the CERN Neutrino Platform through the construction and operation of a 750-ton liquid argon prototype, ProtoDUNE-VD. This poster presents the design of the VD PDS and performance results from ProtoDUNE-VD.