Electron-muon ranger: performance in the MICE muon beam

Abstract

The Muon Ionization Cooling Experiment (MICE) will perform a detailed study\nof ionization cooling to evaluate the feasibility of the technique. To carry\nout this program, MICE requires an efficient particle-identification (PID)\nsystem to identify muons. The Electron-Muon Ranger (EMR) is a fully-active\ntracking-calorimeter that forms part of the PID system and tags muons that\ntraverse the cooling channel without decaying. The detector is capable of\nidentifying electrons with an efficiency of 98.6%, providing a purity for the\nMICE beam that exceeds 99.8%. The EMR also proved to be a powerful tool for the\nreconstruction of muon momenta in the range 100-280 MeV/$c$.\n