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Title: Orbit and Optics Distortion in a Nonscaling Muon FFAG

Abstract

Finite chromaticity in a nonscaling FFAG makes transverse tunes move during acceleration. Particles have to cross many integer and half-integer resonances although all those tunes are imperfection ones. Plausible argument is that the acceleration is so fast that effects of those resonance crossings are marginal. We did a tracking study in a lattice with alignment and gradient errors to see how the orbit and optics distortion is excited. We found that in a time scale of the muon acceleration, namely total tune changes about one unit per turn, the resonance is not a proper way to describe the beam dynamics. Instead, a random walk model, in which we assume that alignment and gradient errors kick a particle randomly in phase space, well explains the tracking results.

Authors:
 [1]
  1. ASTeC, STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, (United Kingdom)
Publication Date:
OSTI Identifier:
21055354
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 981; Journal Issue: 1; Conference: NuFact 07: 9. international workshop on neutrino factories, superbeams and beta beams, Okayama (Japan), 6-11 Aug 2007; Other Information: DOI: 10.1063/1.2898975; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATION; ALIGNMENT; BEAM DYNAMICS; BEAM PRODUCTION; GRAPH THEORY; MUON BEAMS; MUONS; PHASE SPACE; RESONANCE

Citation Formats

Machida, Shinji. Orbit and Optics Distortion in a Nonscaling Muon FFAG. United States: N. p., 2008. Web. doi:10.1063/1.2898975.
Machida, Shinji. Orbit and Optics Distortion in a Nonscaling Muon FFAG. United States. https://doi.org/10.1063/1.2898975
Machida, Shinji. 2008. "Orbit and Optics Distortion in a Nonscaling Muon FFAG". United States. https://doi.org/10.1063/1.2898975.
@article{osti_21055354,
title = {Orbit and Optics Distortion in a Nonscaling Muon FFAG},
author = {Machida, Shinji},
abstractNote = {Finite chromaticity in a nonscaling FFAG makes transverse tunes move during acceleration. Particles have to cross many integer and half-integer resonances although all those tunes are imperfection ones. Plausible argument is that the acceleration is so fast that effects of those resonance crossings are marginal. We did a tracking study in a lattice with alignment and gradient errors to see how the orbit and optics distortion is excited. We found that in a time scale of the muon acceleration, namely total tune changes about one unit per turn, the resonance is not a proper way to describe the beam dynamics. Instead, a random walk model, in which we assume that alignment and gradient errors kick a particle randomly in phase space, well explains the tracking results.},
doi = {10.1063/1.2898975},
url = {https://www.osti.gov/biblio/21055354}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 981,
place = {United States},
year = {Thu Feb 21 00:00:00 EST 2008},
month = {Thu Feb 21 00:00:00 EST 2008}
}