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Neutrino Factory/Muon Collider Document 109-v1

Electron-proton instabilities for intense proton rings

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MuCool Note
Submitted by:
John Urish
Updated by:
John Urish
Document Created:
04 Apr 2000, 12:00
Contents Revised:
04 Apr 2000, 12:00
Metadata Revised:
04 Apr 2000, 12:00
Actually Revised:
14 Sep 2006, 13:35
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K. Y. Ng

(March, 2000)


Electron-proton instabilities are compared among the high-intensity
Fermilab future booster, the Oak Ridge SNS storage ring, the Los Alamos
PSR, and the Brookhaven booster. All these 4 machines have proton
intensities ranging from $2.4\times10^{13}$ to $1\times10^{14}$. The
escape rates of single electrons from the bunch gaps are computed.
The threshold neutralization factors for coherent centroid-oscillation
for proton and electron beams are derived. The energies of electron
escaping from the bunch hitting the walls of the beam pipe are estimated
so as to determine whether multipactoring will occur or not. Finally,
the reasons why e-p instabilities have not been observed at the
Rutherford ISIS are discussed.

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