The MICE Beamline instrumentation for a precise emittance measurement

The international Muon Ionization Cooling Experiment (MICE) will perform a systematic investigation of ionization cooling of a muon beam. The demonstration comprises one cell of the US Study II neutrino factory cooling channel. As the emittance measurement will be done on a particle-by-particle basis, sophisticated beam instrumentation is needed to measure particle coordinates and timing vs RF. A PID system has been constructed and installed at RAL, in order to keep beam contamination (e, π) well below 1%. The muon beamline has been characterized, obtaining μ⁺ rates up to ~ 30 good muons per ISIS spill (for a 1 V ·ms beam loss). A preliminary measure of the beam emittance, using a particle-by-particle method with only the TOF detector system, has been developed.