Lorena Escudero (IFIC, Valencia) on behalf of the T2K collaboration

22The Near Detectors II:ND280(OFF Axis)ND280 goal is to measure the flux, energyspectrum and νe contamination beforeoscillation.General purpose to measure: CCνμevents, used for flux normalization andspectrum prediction for the oscillationanalysis and detailed cross section studies;and CCνe events, background to νeappearance.ND280 Magnet & SMRDND280 is built inside the old CERN UA1/NOMAD magnet that provides a dipole magneticfield of 0.2 T.SMRD (Side Muon Range Detector) consistsof 440 scintillator modules inserted in the airgaps of the magnet. It records muons escapingwith high angles, triggers on cosmic ray muonsand helps identifying interactions in thesurrounding cavity.ECAL3 different types depending on the position:DSEcal, BarrelEcal, P0DEcal.These modules are electromagneticcalorimeters using layers of plastic scintillator. Itsrole is to detect photons complementing theinner detectors in full event reconstruction. Theinformation provided by the Ecals is relevant forparticle identification and key in the pi0reconstruction.