Orbit and Optics Distortion in a Nonscaling Muon FFAG
- ASTeC, STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, (United Kingdom)
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.
- OSTI ID:
- 21055354
- Journal Information:
- AIP Conference Proceedings, Vol. 981, 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); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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