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Neutrino Factory/Muon Collider Document 74-v1

Comments on Frictional Cooling and the Zero Energy Options for cooling intense muon beams

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MuCool Note
Submitted by:
John Urish
Updated by:
John Urish
Document Created:
01 Jan 2000, 12:00
Contents Revised:
01 Jan 2000, 12:00
Metadata Revised:
01 Jan 2000, 12:00
Actually Revised:
14 Sep 2006, 13:35
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Revision 1 : minor typos, and comments from Panagiotis S. included.
This version will hopefully appear in the Montauk conf. AIP proceedings.
It is shown that the proposed frictional cooling method is not directly
applicable to intense ($\approx 10^{12}$) muon bunches, mostly due to space
charge constraints. Other difficulties stem from the fact that the initial
emittance must be quite small, compared to the nominal muon collider emittance.
Excessive heat due to energy deposition in the foils, from the primary muon
beam or from secondary electrons could also destroy the thin foils used
as moderator. Other ``zero energy" schemes are considered, separately for
$\mu^-$ and $\mu^+$. All of them lead us to the study of exotic
electrons-ions-muons plasma.

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