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Neutrino Factory/Muon Collider Document 129-v1

Muon polarization effects in the front end of the neutrino factory

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Document type:
MuCool Note
Submitted by:
John Urish
Updated by:
John Urish
Document Created:
30 May 2000, 12:00
Contents Revised:
30 May 2000, 12:00
Metadata Revised:
30 May 2000, 12:00
Actually Revised:
14 Sep 2006, 13:35
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We summarize the methods used for simulation of polarization effects in the front end of a
possible neutrino factory. We first discuss the helicity of muons in the pion decay process. We
find that, neglecting acceptance considerations, the average helicity asymptotically approaches a
magnitude of 0.185 at large pion momenta. Next we describe the methods used for tracking the
spin through the complicated electromagnetic field configurations in the front end of the neutrino
factory, including rf phase rotation and ionization cooling channels. Various depolarizing
effects in matter are then considered, including multiple Coulomb scattering and elastic
scattering from atomic electrons. Finally, we include all these effects in a simulation of a 480 m
long, double phase rotation front end scenario.
Posted muc0129.pdf to WWW
Posted by fernow
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Notes and Changes:
R. Fernow, J. Gallardo, Y. Fukui
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