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Title: Results from Step I of MICE and the Physics Plan for Step IV
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Abstract content
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The Muon Ionisation Cooling Experiment (MICE) will demonstrate
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ionisation cooling, an essential technology for a
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Neutrino Factory and/or Muon Collider, by measuring a 10% reduction in
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emittance of a muon beam. A realistic
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demonstration requires beams closely resembling those expected at the
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front-end of a Neutrino Factory, i.e. with large
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transverse emittance and momentum spreads. The MICE muon beam line at
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ISIS, RAL, was built to provide beams of
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different momenta and emittance so that the performance of the cooling
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channel can be fully explored.
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During the initial stage of MICE, a novel technique based on
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time-of-flight counters was used to establish that the beam
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emittances are in the range 0.7--2.8 mm-rad, with central momenta from
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170--280 MeV/c, and momentum spreads of about
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20 MeV/c. These beams will be increased by means of scattering from
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high-Z material in the next stage of MICE and
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measured using magnetic spectrometers. Finally, low-Z absorbers such as
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liquid hydrogen and LiH will be used to reduce
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the emittance of the beam. The physics program of this step of MICE will
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be discussed, including all stages necessary for a
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first demonstration of ionisation cooling.
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