Fluctuations Do Matter: Large Noise-Enhanced Halos in Charged-Particle Beams
Accelerator Physics
2009-11-10 v1
Abstract
The formation of beam halos has customarily been described in terms of a particle-core model in which the space-charge field of the oscillating core drives particles to large amplitudes. This model involves parametric resonance and predicts a hard upper bound to the orbital amplitude of the halo particles. We show that the presence of colored noise due to space-charge fluctuations and/or machine imperfections can eject particles to much larger amplitudes than would be inferred from parametric resonance alone.
Keywords
Cite
@article{arxiv.physics/0306004,
title = {Fluctuations Do Matter: Large Noise-Enhanced Halos in Charged-Particle Beams},
author = {Courtlandt L. Bohn and Ioannis V. Sideris},
journal= {arXiv preprint arXiv:physics/0306004},
year = {2009}
}
Comments
13 pages total, including 5 figures