MOA2 —  Muon II   (18-Sep-17   16:30—17:50)
Chair: Y. Zhang, JLab, Newport News, Virginia, USA
Paper Title Page
MOA21 Emittance Evolution in MICE 11
 
  • M.A. Uchida
    Imperial College of Science and Technology, Department of Physics, London, United Kingdom
 
  Funding: STFC, DOE, NSF, INFN, CHIPP etc
The Muon Ionization Cooling Experiment (MICE) was designed to demonstrate a measurable reduction in beam emittance due to ionization cooling. The emittance of a variety of muon beams was reconstructed before and after a 'cooling cell', allowing the change in the phase-space distribution due to the presence of an absorber to be measured. The core of the MICE experiment is a cooling cell that can contain a range of solid and cryogenic absorbers inside a focussing solenoid magnet. For the data described here, a single lithium hydride (LiH) absorber was installed and two different emittance beam have been analysed. Distributions that demonstrate emittance increase and equilibrium have been reconstructed, in agreement with theoretical predictions. Data taken during 2016 and 2017 is currently being analysed to evaluate the change in emittance with a range of absorber materials, different initial emittance beams and various magnetic lattice settings. The current status and the most recent results of these analyses is presented.
Submitted by the MICE speakers bureau. If accepted, a member of the collaboration will be selected to present the contribution
 
slides icon Slides MOA21 [1.732 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2017-MOA21  
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MOA22 Recent Results from MICE on Multiple Coulomb Scattering and Energy Loss 16
 
  • J.C. Nugent, P. Soler
    University of Glasgow, Glasgow, United Kingdom
  • R. Bayes
    Laurentian University, Campus Sudbury, Sudbury, Ontario, Canada
 
  Funding: STFC, DOE, NSF, INFN, CHIPP etc
Multiple coulomb scattering and energy loss are well known phenomena experienced by charged particles as they traverse a material. However, from recent measurements by the MuScat collaboration, it is known that the available simulation codes (GEANT4, for example) overestimate the scattering of muons in low Z materials. This is of particular interest to the Muon Ionization Cooling Experiment (MICE) collaboration which has the goal of measuring the reduction of the emittance of a muon beam induced by energy loss in low Z absorbers. MICE took data without magnetic field suitable for multiple scattering measurements in the fall of 2015 with the absorber vessel filled with Xenon and in the spring of 2016 using a lithium hydride absorber. The scattering data are compared with the predictions of various models, including the default GEANT4 model. In the fall of 2016 MICE took data with magnetic fields on and measured the energy loss of muons in a lithium hydride absorber. These data are also compared with model predictions and with the Bethe-Bloch formula.
Submitted by the MICE speakers bureau. If accepted, a member of the collaboration will be selected to present the contribution
 
slides icon Slides MOA22 [4.626 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2017-MOA22  
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