Speaker
Description
The Deep Underground Neutrino Experiment (DUNE) is a next-generation neutrino oscillation long-baseline experiment designed to measure the neutrino mass ordering, the CP-violating phase in the lepton sector of the Standard Model and to improve the precision on key parameters that govern neutrino oscillations. The System for on-Axis Neutrino Detection (SAND) at the DUNE Near Detector complex is designed to monitor the beam on-axis, control systematics uncertainties for the oscillation analysis, precisely measure neutrino cross-sections, and perform short-baseline neutrino physics studies. SAND will exploit the existing KLOE electromagnetic calorimeter (ECAL) that will work with a $0.6$ T superconducting magnet, a 1-ton liquid Argon detector (GRAIN), and a modular, low-density straw tube target tracker system.
The ECAL is based on a lead-scintillating fiber sampling technology and consists of a cylindrical barrel composed of $24$ modules and two endcaps with $32$ modules each, providing nearly complete hermetic coverage of the SAND inner volume. Modules are $23$ cm ($\sim 15~X_0$) thick and are read-out on both sides by photomultiplier tubes (PMTs) with a granularity of $\sim 4.4 \times 4.4~cm^2$, for a total of $4880$ PMTs. Thanks to the excellent energy $\sigma_{E} / E \sim 5.7 \% /\sqrt(E)$ and time resolution $ \sim 54 ps /\sqrt(E(GeV))$ achieved in KLOE, precise reconstruction of electromagnetic showers and high performance in particle discrimination have been reached. Leveraging these technological characteristics, the SAND ECAL will enhance event reconstruction, improve neutrino interaction vertex determination, and contribute to background rejection. In this talk, the current configuration of the ECAL, the reconstruction algorithm and the particle discrimination performance for SAND will be presented.
