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CHEP2013_MICEGlobalRecon_Abstract.txt

Taylor, Ian, 07 August 2013 12:01

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The Muon Ionization Cooling Experiment (MICE) is under development at
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the Rutherford Appleton Laboratory (UK). The experiment's goal is to
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demonstrate ionization cooling, using a section of cooling
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channel. The final step of the experiment will be able to measure a
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10% reduction in the emittance (transverse size) of a muon beam, with
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a relative precision of 1%.
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The emittance measurement will rely on inputs from scintillating fibre
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trackers, time-of-flight counters, transition Cherenkov detectors and
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the Electron-Muon Ranger, a fully active tracker-calorimeter at the
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downstream end. These detectors will together provide position,
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momentum and timing measurements of particles upstream and downstream
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of the experiment together with identification of particle species.
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The global reconstruction software, a part of the MICE Analysis User
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Software (MAUS), will combine the measurements from individual
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detectors into a set of complete particle hypotheses. Each 1 ms beam
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spill is reconstructed in parallel; a spill is divided into individual
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particle triggers and passed through a series of algorithms; track
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reconstruction and fitting, combined particle identification, and
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tagging and rejection of in-flight decays. The triggers are then
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recombined, and a collection of particle hypotheses are passed to the
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emittance analysis.
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We will discuss in detail the components of the global reconstruction,
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including:
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* Particle track matching through the quadrupole, solenoidal and
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  time-varying RF fields of the beam optics.
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* Particle identification, using a combination of detector
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  technologies and measurements.
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* The identification of in-flight particle decays, single hard
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  multiple-scatters or multiple particles per trigger; each of which
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  would invalidate MICE's 'single muon' analysis strategy.