First particle-by-particle measurement of emittance in the Muon Ionization Cooling Experiment

Adams, D. and Ronald, K. and Whyte, C. and Young, A. and Chatzitheodoridis, G., The MICE collaboration (2019) First particle-by-particle measurement of emittance in the Muon Ionization Cooling Experiment. European Physical Journal C, 79 (3). 257. ISSN 1434-6044

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      Abstract

      The Muon Ionization Cooling Experiment (MICE) collaboration seeks to demonstrate the feasibility of ionization cooling, the technique by which it is proposed to cool the muon beam at a future neutrino factory or muon collider. The emittance is measured from an ensemble of muons assembled from those that pass through the experiment. A pure muon ensemble is selected using a particle-identification system that can reject efficiently both pions and electrons. The position and momentum of each muon are measured using a high-precision scintillating-fibre tracker in a 4 T solenoidal magnetic field. This paper presents the techniques used to reconstruct the phase-space distributions and reports the first particle-by-particle measurement of the emittance of the MICE Muon Beam as a function of muon-beam momentum.