Relatore
Descrizione
Since their discovery, neutrinos have captivated physicists worldwide, leading to a multitude of theories and experiments aimed at unveiling their mysterious nature. Despite extensive efforts,numerous open questions remain, and addressing one or more of these questions could profoundly impact our understanding of particle physics and the universe. Consequently, there is a strong motivation to develop new instruments, such as the Deep Underground Neutrino Experiment (DUNE), which will employ innovative technologies and the most powerful available neutrino beam to study CP violation in the neutrino sector and determine the neutrino mass ordering. Beyond these goals, the detector configuration will enable additional physics studies, such as supernova and solar neutrinos detection and search for physics beyond the Standard Model. DUNE will consist of a Near Detector complex, located close to the neutrino beam at Fermilab (Illinois), and a Far Detector (FD) at SURF (South Dakota), 1300 km away. The FD will comprise four 17-kton Liquid Argon (LAr) detectors. Two of them will be installed during Phase I of the experiment: a vertical
drift (VD) LAr TPC and a horizontal drift (HD) LAr TPC. The remaining two, planned for Phase II, are currently under design. Both VD and HD will exploit the possibility of detecting scintillation light in argon using a Photon Detection System (PDS) composed of innovative detectors called X-Arapuca. The X-Arapucas will serve as trigger for non-beam events, enabling the experiment to achieve many of its primary scientific goals. Additionally, they will contribute to neutrino interaction vertex and primary track reconstruction while providing a complementary calorimetric measurement. Two 750-ton LAr prototypes were built at CERN to test this technology and are currently in operation. In this talk, the DUNE PDS will be described, along with a report on the ongoing activities involving the CERN prototypes.
