The MICE beamline instrumentation (trackers and PID) for a precise emittance measurement.

The International Muon Ionization Cooling Experiment (MICE) will carry out

a systematic investigation of ionization cooling of a muon beam, for the

future Neutrino Factory and the Muon Collider. As the emittance measurement

will be done on a particle-by-particle basis, a sophisticated beam 

instrumentation is needed to measure both particle coordinates and timing 

vs RF in a harsh environment due to high particle rates, fringe magnetic fields and RF backgrounds. A PID system, based on three time-of-flight stations (with

resolutions up to 50-60 ps), two Aerogel Cerenkov counters and a KLOE-like

calorimeter (KL) has been constructed and has allowed the commissioning of the

MICE muon beamline in 2010. It will be soon followed  by an

Electron Muon Ranger to determine the muon range at the apparatus  downstream 

end and later by two tracker detectors to trace incoming particles inside two

high-field  superconducting solenoids.

Detector performances will be shown and their use for the beamline

characterization fully illustrated.