Keyword: solenoid
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MOA12 The Muon Ionization Cooling Experiment ion, emittance, scattering, experiment 1
 
  • M.A. Uchida
    Imperial College of Science and Technology, Department of Physics, London, United Kingdom
 
  The Muon Ionization Cooling Experiment (MICE) is designed to demonstrate a measurable reduction in muon beam emittance due to ionization cooling. This demonstration will be an important step in establishing the feasibility of muon accelerators for particle physics. The emittance of a variety of muon beams is measured before and after a "cooling cell", allowing the change in the phase-space distribution due to the presence of an absorber to be measured. Two solenoid spectrometers are instrumented with high-precision scintillating-fibre tracking detectors (Trackers) before and after the cooling cell which measure the normalized emittance reduction. Data has been taken since the end of 2015 to study several beams of varying momentum and input emittance as well as three absorber materials in the cooling cell, over a range of optics. The experiment and an overview of the analyses are described here.  
slides icon Slides MOA12 [23.988 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2017-MOA12  
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MOA13 Measurement of Phase Space Density Evolution in MICE ion, emittance, simulation, collider 6
 
  • F. Drielsma
    DPNC, Genève, Switzerland
  • D. M. Maletic
    Belgrade Institute of Physics, Belgrade, Serbia
 
  Funding: STFC, DOE, NSF, INFN, CHIPP etc
The Muon Ionization Cooling Experiment (MICE) collaboration will demonstrate the feasibility of ionization cooling, the technique proposed for a future muon storage ring or collider. The muon beam parameters are measured particle-by-particle, before and after a cooling cell, using high precision scintillating-fibre trackers in a solenoidal field. The position and momentum reconstruction of individual muons in MICE allows for the development of several alternative figures of merit in addition to beam emittance. Contraction of the phase-space volume occupied by the sample, or equivalently the increase in phase-space density at its core, is an unequivocal cooling signature. Single-particle amplitude, defined as a weighted distance to the sample centroid, can be used to probe the change in the density in the core of the beam. Alternatively, non-parametric statistics provides reliable methods to estimate the entire phase-space density distribution and reconstruct probability contours. The aforementioned techniques are robust to transmission losses and sample non-linearities, making them ideal candidates to perform a cooling measurement in MICE. Preliminary results are presented here.
Submitted by the MICE speakers bureau. If accepted, a member of the collaboration will be selected to present the contribution
 
slides icon Slides MOA13 [1.926 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2017-MOA13  
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MOA21 Emittance Evolution in MICE ion, emittance, experiment, detector 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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TUM11 Low Energy Electron Cooler for the NICA Booster ion, electron, vacuum, gun 22
 
  • A.V. Bubley, M.I. Bryzgunov, V.A. Chekavinskiy, A.D. Goncharov, K. Gorchakov, I.A. Gusev, V.M. Panasyuk, V.V. Parkhomchuk, V.B. Reva, D.V. Senkov
    BINP SB RAS, Novosibirsk, Russia
  • A.V. Smirnov
    JINR, Dubna, Moscow Region, Russia
 
  The low energy electron cooler for the NICA booster has recently been installed at the booster ring of the NICA facility. The article describes results of various measurements obtained during its commissioning. Also some details of design and construction of the cooler are discussed.  
slides icon Slides TUM11 [3.933 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2017-TUM11  
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TUP04 Muon Intensity Increase by Wedge Absorbers for low-E Muon Experiments ion, emittance, experiment, simulation 32
 
  • D.V. Neuffer, J. Bradley, D. Stratakis
    Fermilab, Batavia, Illinois, USA
 
  Low energy muon experiments such as mu2e and g-2 have a limited energy spread acceptance. Following techniques developed in muon cooling studies and the MICE experiment, the number of muons within the desired energy spread can be increased by the matched use of wedge absorbers. More generally, the phase space of muon beams can be manipulated by absorbers in beam transport lines. Applications with simulation results are presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2017-TUP04  
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WEM12 Development of a Bunched Beam Electron Cooler Based on ERL and Circulator Ring Technology for the Jefferson Lab Electron-Ion Collider ion, electron, simulation, proton 72
 
  • S.V. Benson, Y.S. Derbenev, D. Douglas, F.E. Hannon, A. Hutton, R. Li, R.A. Rimmer, Y. Roblin, C. Tennant, H. Wang, H. Zhang, Y. Zhang
    JLab, Newport News, Virginia, USA
 
  Funding: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177.
Jefferson Lab is in the process of designing an electron ion collider with unprecedented luminosity at a 45 GeV center-of-mass energy. This luminosity relies on ion cooling in both the booster and the storage ring of the accelerator complex. The cooling in the booster will use a conventional DC cooler similar to the one at COSY. The high-energy storage ring, operating at a momentum of up to 100 GeV/nucleon, requires the novel use of bunched-beam cooling. There are two designs for such a bunched beam cooler. The first uses a conventional Energy Recovery Linac (ERL) with a magnetized beam while the second uses a circulating ring to enhance both the peak and average current experienced by the ion beam. This presentation will describe the design of both the Circulator Cooling Ring (CCR) design and that of the backup option using the stand-alone ERL operated at lower charge but higher repetition rate than the ERL injector required by the CCR-based design.
 
slides icon Slides WEM12 [5.124 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2017-WEM12  
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