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Direct measurement of emittance using the MICE scintillating fibre tracker (Preliminary)

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Abstract

The Muon Ionization Cooling Experiment (MICE) collaboration will demonstrate the feasibility of ionization cooling, the technique by which it is proposed to cool the moun beam at a future neutrino factory or muon collider. The muon beam emittance is measured on a particle-by-particle basis. Mea- surements are made before and after the cooling cell using a high precision scintillating-fibre tracker in a 4T solenoidal field. A pure muon beam is selected using a particle identification system that can reject efficiently both pions and electrons.
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The emittance of the MICE muon beam has been measured for the first time using the scintillating- fibre tracking system. The performance of the tracking and particle identification detectors and the analysis techniques required for this precision measurement are presented.

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Published in: Forthcoming
arXiv: Forthcoming
RAL Preprint: Forthcoming
DOI: Forthcoming

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Multiple Coulomb Scattering in Lithium Hydride Absorbers (Preliminary)

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Abstract

Multiple coulomb scattering is a well known electromagnetic phenomenon experienced by charged particles traversing materials. However, from recent measurements by the MuScat experiment it is known that the available simulation codes, specifically GEANT4, overestimate the scattering of muons in low Z materials. This is of particular interest to the Muon Ionization Cooling Experiment (MICE) which has the goal of measuring the reduction of a muon beam emittance induced by energy loss in low Z absorbers. Multiple scattering induces positive changes in the emittance in contrast to the reduction due to ionization energy loss. It therefore is essential that MICE measures multiple scattering for its absorber materials; lithium hydride and liquid hydrogen; and validate the multiple scattering against known simulations. MICE took data with magnetic fields off suitable for multiple scattering measurements in the spring of 2016.

Paper

Published in: Forthcoming
arXiv: Forthcoming
RAL Preprint: Forthcoming
DOI: Forthcoming

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References
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Step-4.ai (1.2 MB) Long, Kenneth, 09 February 2015 21:33

Step-4.eps (665.1 kB) Long, Kenneth, 09 February 2015 21:33

Step-4-labels.ai (1.3 MB) Long, Kenneth, 10 February 2015 09:35

Step-4-labels.eps (971.4 kB) Long, Kenneth, 10 February 2015 09:35

Step-4-labels.pdf (83.4 kB) Long, Kenneth, 10 February 2015 09:35

Step-4.pdf (52.2 kB) Long, Kenneth, 10 February 2015 09:35