Abstract
The international Muon Ionization Cooling Experiment (MICE) will perform a systematic investigation of ionization cooling with muon beams of momentum between 140 and 240 MeV/c at the Rutherford Appleton Laboratory ISIS facility. The measurement of ionization cooling in MICE relies on the selection of a pure sample of muons that traverse the experiment. To make this selection, the MICE Muon Beam is designed to deliver a beam of muons with less than ∼1% contamination. To make the final muon selection, MICE employs a particle-identification (PID) system upstream and downstream of the cooling cell. The PID system includes time-of-flight hodoscopes, threshold-Cherenkov counters and calorimetry. The upper limit for the pion contamination measured in this paper is fπ < 1.4% at 90% C.L., including systematic uncertainties. Therefore, the MICE Muon Beam is able to meet the stringent pion-contamination requirements of the study of ionization cooling.
Highlights
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: The international Muon Ionization Cooling Experiment (MICE) will perform a systematic investigation of ionization cooling with muon beams of momentum between 140 and
The MICE Muon Beam is designed to deliver a beam of muons with less than
Summary
The MICE experiment, shown schematically in figure 1, is similar to the cooling channel for the International Design Study for the Neutrino Factory [7], and differs from the original cooling channel design in [4]. The tracking spectrometers [16] upstream and downstream of the cooling cell consist of scintillatingfibre tracking modules inside solenoid magnetic fields that measure the emittance before and after the cooling cell These are required to measure the normalised transverse emittance, N , with a precision σ N / N ∼ 0.1%. The precision of the TOF time-measurement must be sufficient to allow the phase at which the muon enters the RF cavities to be determined to 5◦. To satisfy these requirements, the resolution of each TOF station must be ∼50 ps. A detailed description of KL is given in [21]
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