The Electron-Muon Ranger (EMR) is a totally active scintillator
detector (TASD) to be installed in the muon beam of the Muon
Ionization Cooling Experiment (MICE) - the R&D project for the future
neutrino factory. The EMR is made of 48 intersecting layers. Each
layer consists of 59 triangular scintillator bars. Each bar
incorporates a wave-length shifting (WLS) fiber that collects light
emitted by the scintillator. At the faces of each bar the WLS fiber is
coupled to a light guide that transfers light to a PMT. Scintillatior
bars are read out at both sides, one side is connected to a
single-channel PMT and the other - to the 64-channel PMT. The
granularity of the detector allows us to identify tracks and measure
particle ranges and shower shapes. The EMR will be installed at the
very end of the MICE cooling channel and will stop and measure all
outgoing particles. Currently it is being built at the University of
Geneva and it is planned to install it in MICE by the end of 2012.