MICE combines systems to identify, track, steer, and cool muons. The muon emittance is measured with scintillating-fibre tracking detectors in a 4-tesla magnetic field both before and after the main cooling cell. A diffuser can be placed in front of the first tracking detector to study the cooling of muon beams with larger emittance. The main cooling cell consists of a secondary LiH absorber, a
radio frequency cavity (RF cavity), coils to focus the beam onto the central main absorber (LiH or LH2), magnet coils to focus the beam leaving the main absorber, a second RF cavity, and another secondary LiH absorber. While the secondary absorbers contribute to cooling, their main purpose is to stop electrons released in the RF cavities. The RF cavities are designed to accelerate the muons. As they cannot be synchronized with the incoming muons, some muons will be accelerated while others will be decelerated. The time of flight measurements allow a calculation of the electric field that the muons experienced in the cavities. The baseline main absorber is a LiH disk thick. Alternatively, a liquid hydrogen vessel can be used.
Detectors Muons pass through the cooling channel one-by-one. The muons' phase space coordinates will be measured by time-of-flight scintillators and scintillating fibre tracking detectors upstream and downstream of the cooling channel. Muons will be distinguished from other particles in the beam using a combination of the spectrometers and the so-called
Particle Identification (PID) detectors, three time-of-flight
scintillators, a Cerenkov detector, and a
calorimeter. == Status ==