Author: Hanson, G.G.
Paper Title Page
MOP053 Measurement of Neutral Particle Contamination in the MICE Muon Beam 199
 
  • L. Coney, R.R.M. Fletcher, G.G. Hanson
    UCR, Riverside, California, USA
 
  Funding: NSF
The Muon Ionization Cooling Experiment (MICE) is being built at the ISIS proton synchrotron at Rutherford Appleton Laboratory (RAL) to test ionization cooling of a muon beam. Production of particles in the MICE beamline begins with a titanium target dipping into the ISIS proton beam. The resulting pions are captured, momentum-selected, and fed into a 5T superconducting solenoid. This magnet contains the pions and their decay muons which are then sent through the rest of the MICE beamline toward the cooling channel. During recent data-taking, it was determined that there is a significant background contamination of neutral particles populating the MICE muon beam. This contamination creates unwanted triggers in MICE, thus reducing the percentage of useful data taken during running. This paper describes the analysis done with time-of-flight detectors, used to identify particle type, in order to understand the level of contamination in both positive and negative polarity muon beams.
 
 
MOP059 Simulations of the Tapered Guggenheim 6d Cooling Channel for the Muon Collider 217
 
  • P. Snopok
    IIT, Chicago, Illinois, USA
  • G.G. Hanson
    UCR, Riverside, California, USA
  • R. B. Palmer
    BNL, Upton, Long Island, New York, USA
 
  Funding: Work is supported by the U.S. Department of Energy.
Recent progress in six-dimensional (6D) cooling simulations for the Muon Collider based on the RFOFO ring layout is presented. In order to improve the performance of the cooling channel a tapering scheme is studied that implies changing the parameters such as cell length, magnetic field strength, RF frequency, and the amount of the absorbing material along the cooling channel. This approach allows us to keep the cooling rates high throughout the process. The results of the simulations carried out in G4beamline are presented.
 
 
MOP060 Wedge Absorber Design and Simulation for MICE Step IV 220
 
  • C.T. Rogers
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
  • L. Coney, G.G. Hanson
    UCR, Riverside, California, USA
  • P. Snopok
    IIT, Chicago, Illinois, USA
 
  Funding: Work is supported by the Science and Technology Facilities Council, the U.S. Department of Energy and the U.S. National Science Foundation.
In the Muon Ionization Cooling Experiment (MICE), muons are cooled by passing through material, then through RF cavities to compensate for the energy loss; which reduces the transverse emittance. It is planned to demonstrate longitudinal emittance reduction via emittance exchange in MICE by using a solid wedge absorber in Step IV. Based on the outcome of previous studies, the shape and material of the wedge were chosen. We address here further simulation efforts for the absorber of choice as well as engineering considerations in connection with the absorber support design.