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Pion contamination in the MICE muon beam

  • Author(s): Adams, D
  • Alekou, A
  • Apollonio, M
  • Asfandiyarov, R
  • Barber, G
  • Barclay, P
  • De Bari, A
  • Bayes, R
  • Bayliss, V
  • Bertoni, R
  • Blackmore, VJ
  • Blondel, A
  • Blot, S
  • Bogomilov, M
  • Bonesini, M
  • Booth, CN
  • Bowring, D
  • Boyd, S
  • Brashaw, TW
  • Bravar, U
  • Bross, AD
  • Capponi, M
  • Carlisle, T
  • Cecchet, G
  • Charnley, C
  • Chignoli, F
  • Cline, D
  • Cobb, JH
  • Colling, G
  • Collomb, N
  • Coney, L
  • Cooke, P
  • Courthold, M
  • Cremaldi, LM
  • Demello, A
  • Dick, A
  • Dobbs, A
  • Dornan, P
  • Drews, M
  • Drielsma, F
  • Filthaut, F
  • Fitzpatrick, T
  • Franchini, P
  • Francis, V
  • Fry, L
  • Gallagher, A
  • Gamet, R
  • Gardener, R
  • Gourlay, S
  • Grant, A
  • Greis, JR
  • Griffiths, S
  • Hanlet, P
  • Hansen, OM
  • Hanson, GG
  • Hart, TL
  • Hartnett, T
  • Hayler, T
  • Heidt, C
  • Hills, M
  • Hodgson, P
  • Hunt, C
  • Iaciofano, A
  • Ishimoto, S
  • Kafka, G
  • Kaplan, DM
  • Karadzhov, Y
  • Kim, YK
  • Kuno, Y
  • Kyberd, P
  • Lagrange, JB
  • Langlands, J
  • Lau, W
  • Leonova, M
  • Li, D
  • Lintern, A
  • Littlefield, M
  • Long, K
  • Luo, T
  • Macwaters, C
  • Martlew, B
  • Martyniak, J
  • Mazza, R
  • Middleton, S
  • Moretti, A
  • Moss, A
  • Muir, A
  • Mullacrane, I
  • Nebrensky, JJ
  • Neuffer, D
  • Nichols, A
  • Nicholson, R
  • Nugent, JC
  • Oates, A
  • Onel, Y
  • Orestano, D
  • Overton, E
  • Owens, P
  • Palladino, V
  • Pasternak, J
  • et al.
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.

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