| Paper |
Title |
Page |
| WEPLS002 |
Design and Expected Performance of the Muon Beamline for the Muon Ionisation Cooling Experiment
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2397 |
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- K. Tilley, D.J. Adams, P. Drumm
CCLRC/RAL/ISIS, Chilton, Didcot, Oxon
- T.J. Roberts
Muons, Inc, Batavia
- K.a. Walaron
University of Glasgow, Glasgow
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It is proposed to install a Muon Ionisation Cooling Experiment (MICE) at the ISIS facility, at Rutherford Appleton Laboratory (RAL). This experiment will be the first demonstration of ionisation cooling as a means to reduce the large transverse emittance of the muon beam, produced during the early stages of a Neutrino Factory. In order to permit a realistic demonstration of cooling, a beam of muons must be produced, possessing particular qualities, notably in emittance and momenta. This paper describes the current design for the muon beamline, outlining issues particular to the needs of the MICE experiment, and discusses its expected performance.
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| WEPLS007 |
A Six-dimensional Muon Beam Cooling Experiment
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2409 |
| |
- R.P. Johnson, M. Alsharo'a, M.A.C. Cummings, M. Kuchnir, K. Paul, T.J. Roberts
Muons, Inc, Batavia
- D.M. Kaplan
Illinois Institute of Technology, Chicago, Illinois
- V.S. Kashikhin, V. Yarba, K. Yonehara
Fermilab, Batavia, Illinois
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Ionization cooling, a method for shrinking the size of a particle beam, is an essential technique for the use of muons in future particle accelerators. Muon colliders and neutrino factories, examples of such future accelerators, depend on the development of robust and affordable ionization cooling technologies. A 6D cooling experiment has been proposed, incorporating a novel configuration of helical and solenoidal magnets in a prototype cooling channel. This Helical Cooling Channel (HCC) experiment is being designed with simulations and prototypes to provide an affordable and striking demonstration that 6D muon beam cooling is understood well enough to enable intense neutrino factories and high-luminosity muon colliders. Because of the large amount of expected beam cooling, helium instead of hydrogen can be used for the initial experiment, avoiding the safety complications of hydrogen. Cryostats are currently being developed using internal heat exchangers for simple, effective and safe hydrogen absorber systems to use in later cooling experiments and real cooling channels. The experimental design choices and corresponding numerical simulations are reviewed.
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| WEPLS016 |
Studies of a Gas-filled Helical Muon Beam Cooling Channel
|
2424 |
| |
- R.P. Johnson, K. Paul, T.J. Roberts
Muons, Inc, Batavia
- Y.S. Derbenev
Jefferson Lab, Newport News, Virginia
- K. Yonehara
Fermilab, Batavia, Illinois
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A helical cooling channel (HCC) can quickly reduce the six dimensional phase space of muon beams for muon colliders, neutrino factories, and intense muon sources. The HCC is composed of solenoidal, helical dipole, and helical quadrupole magnetic fields to provide the focusing and dispersion needed for emittance exchange as the beam follows an equilibrium helical orbit through a continuous homogeneous absorber. We consider liquid helium and liquid hydrogen absorbers in HCC segments that alternate with RF accelerating sections and we also consider gaseous hydrogen absorber in pressurized RF cavities imbedded in HCC segments. In the case of liquid absorber, the possibility of using superconducting RF in low magnetic field regions between the HCC segments may provide a cost effective solution to the high repetition rate needed for an intense neutrino factory or high average luminosity muon collider. In the gaseous hydrogen absorber case, the pressurized RF cavities can be operated at low temperature to improve their efficiency for higher repetition rates. Numerical simulations are used to optimize and compare the liquid and gaseous HCC techniques.
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