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Neutrino Factory/Muon Collider Document 306-v1

6D Ionization Muon Cooling with Tabletop Rings

Document #:
NFMCC-doc-306-v1
Document type:
MuCool Note
Submitted by:
John Urish
Updated by:
John Urish
Document Created:
13 Jan 2005, 12:00
Contents Revised:
13 Jan 2005, 12:00
Metadata Revised:
13 Jan 2005, 12:00
Actually Revised:
14 Sep 2006, 13:35
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Abstract:
6D Ionization Muon Cooling with Tabletop Rings

D. J. Summers, S. B. Bracker, L. M. Cremaldi, R. Godang,
D. B. Cline, A. A. Garren, G. G. Hanson, A. Klier,
S. A. Kahn, H. G. Kirk, R. B. Palmer

Progress on six dimensional ionization muon cooling with relatively
small rings of magnets is described. Lattices being explored include
scaling sector cyclotrons with edge focusing and strong focusing, fixed
field alternating gradient (FFAG) rings. Ionization cooling is provided
by high pressure hydrogen gas which removes both transverse and
longitudinal momentum. Lost longitudinal momentum is replaced using
radio frequency (RF) cavities, giving a net transverse emittance
reduction. The longer path length in the hydrogen of higher momentum
muons decreases longitudinal emittance at the expense of transverse
emittance. Thus emittance exchange allows these rings to cool in all
six dimensions and not just transversely. Alternatively, if the RF is
located after the ring, it may be possible to cool the muons by
stopping them as they spiral adiabatically into a central swarm. As
momentum goes to zero, the momentum spread goes to zero. The resulting
cooled muons can lead to an intense muon beam which could be a source
for neutrino factories or muon colliders.

This is a PDF document
This is revision # 1
Posted by Don Summers

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Keywords:
COOL_THEORY
Notes and Changes:
D. J. Summers, S. B. Bracker,
L. M. Cremaldi, R. Godang,
D. B. Cline, A. A. Garren,
G. G. Hanson, A. Klier,
S. A. Kahn, H. G. Kirk,
R. B. Palmer
Publication Information:
DPF 2004 - Riverside conference
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