Speaker
Description
In modern physics, the nature of neutrinos remains one of the major open questions, motivating new experimental efforts to investigate their properties. The Deep Underground Neutrino Experiment (DUNE) is a next-generation international experiment designed to determine the neutrino mass ordering, study CP violation in the neutrino sector, detect neutrinos from astrophysical sources, and search for physics beyond the Standard Model.
Currently under construction in the United States, DUNE will use an intense neutrino beam produced at Fermilab and a Far Detector located $1300$ km away at the Sanford Underground Research Facility. The Far Detector will consist of four $17$-kton Liquid Argon Time Projection Chamber (LArTPC) modules, two with already planned geometry and technology, while the remaining two are still under discussion. Phase I includes one Vertical Drift (VD) detector and one Horizontal Drift (HD) detector. Both designs employ a Photon Detection System (PDS) based on X-ARAPUCA devices instrumented with Silicon Photomultipliers (SiPMs).
In the Vertical Drift module, X-ARAPUCAs are installed on both the detector walls and the cathode to optimize light collection in the active volume. However, powering the devices located on the cathode is challenging because this region operates at high voltage ($-300$ kV), making conventional copper cabling impractical. To address this issue, the DUNE collaboration is developing Power over Fiber (PoF) and Signal over Fiber (SoF) solutions, where both power delivery and signal readout are performed through optical fibers.
This contribution presents an overview of PoF and SoF applications for DUNE and reports on recent tests performed at CERN, where the full PDS was operated in a configuration closely resembling the final detector design.
