Speaker
Description
The Deep Underground Neutrino Experiment (DUNE) aims to resolve fundamental open questions in neutrino physics, including the neutrino mass ordering and the possible violation of CP symmetry in the lepton sector. Within the DUNE Near Detector complex, the System for on-Axis Neutrino Detection (SAND) will provide continuous on-axis monitoring of the neutrino beam, enabling precise flux determination, control of systematic uncertainties for oscillation analyses, and a broad program of neutrino interaction measurements.
SAND integrates a 0.6 T superconducting solenoid and an electromagnetic calorimeter, both refurbished from the KLOE experiment, together with a tracking system currently under development. Upstream of the tracker, a 1-ton liquid argon active target, GRAIN (GRanular Argon for Interaction of Neutrinos), will allow detailed reconstruction of ν-Ar interactions. GRAIN will be instrumented with an optical readout system that allows particle reconstruction using scintillation light, derived from either a lens-based optical detector or from a coded-mask optical detector.
In this contribution, the current design and status of SAND and GRAIN will be presented, followed by preliminary simulation results of track and vertex reconstruction in GRAIN using the lens configuration.