Abstracts Brochure - CERN

WEPLS — Poster Session 28-Jun-06 16:00 - 18:00
A Six-dimensional Muon Beam Cooling Experiment
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 ac-
R.P. Johnson, M. Alsharo’a, M.A.C. Cummings, M. Kuchnir, K.
Paul, T.J. Roberts (Muons, Inc) D.M. Kaplan (Illinois Institute of
Technology) V.S. Kashikhin, V. Yarba, K. Yonehara (Fermilab)
celerators, 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.
Simulation of Extreme Muon Beam Cooling
Parametric-resonance Ionization Cooling
(PIC)* and Reverse EMittance EXchange
(REMEX)* are powerful new cooling concepts
on the path toward the development
R.P. Johnson, D.J. Newsham (Muons, Inc) K. Beard, S.A. Bogacz,
Y.S. Derbenev (Jefferson Lab)
of a muon collider. Each of these methods requires a focusing channel that is free of both chromatic and spherical
aberrations. In order to be of practical use in a muon collider, it is also necessary that the focusing channel be as
compact as possible to allow multiple staging with minimal muon loss due to decay. Numerical simulations of a
compact focusing channel for use with REMEX and PIC are presented.
*Y. S. Derbenev and R. P. Johnson, submitted to this conference.
Low Emittance Muon Collider Workshop Summary
The Low Emittance Muon Collider workshop,
held at Fermilab February 6-10, 2006 R.P. Johnson, K. Paul (Muons, Inc) V. Yarba (Fermilab)
focused on the development of high-luminosity
muon colliders using extreme muon beam cooling, where many constraints on muon collider designs are
alleviated with beams of smaller emittance and lower intensity. The workshop covered topics related to proton
drivers, targetry, muon capture, bunching, cooling, cooling demonstration experiments, bunch recombination, muon
acceleration, collider lattices, interaction-point design, site boundary radiation, and detector concepts for energy
frontier and Higgs particle studies. Lower emittance allows for a reduction in the required muon current for a given
luminosity and also allows high energy to be attained by recirculating the beam through high frequency ILC RF
cavities. The highlights of the workshop and the prospects for such colliders will be discussed.
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