Hongyue Duyang (University of South Carolina)
The fine-grained tracker (FGT), the reference near detector for DUNE, is designed to provide a precise determination of the electron/positron identification, momentum, and energy. The particle identification involves measurements of the transition-radiation in the high-resolution straw tube tracker (STT) and the profile of the energy deposition in the ECAL; the momentum is determined from the track reconstruction in the STT within a dipole B-field. The talk summarizes the detector strategy for these measurements. The ability to reconstruct the electron/positrons and the hadrons from the anti-electron neutrino interactions permits an accurate determination of the anti-electron neutrino content of the beam.