Transverse Decoherence and Coherent Spectra in Long Bunches with Space Charge
Abstract
The transverse bunch spectrum and the transverse decoherence/recoherence following an initial bunch offset are important phenomena in synchrotrons and storage rings, and are widely used for beam and lattice measurements. Incoherent shifts of the particles betatron frequency and of the synchrotron frequency modify the transverse spectrum and the bunch decoherence. In this study we analyze the effects of transverse space charge and of the rf nonlinearity on the decoherence signals. The transverse bunch decoherence and the resulting coherent spectra are measured in the SIS18 synchrotron at GSI Darmstadt for different bunch parameters. Particle tracking simulations together with an analytical model are used to describe the modifications in the decoherence signals and in the coherent spectra due to space charge and the rf bucket nonlinearity.
Keywords
Cite
@article{arxiv.1208.0426,
title = {Transverse Decoherence and Coherent Spectra in Long Bunches with Space Charge},
author = {Vladimir Kornilov and Oliver Boine-Frankenheim},
journal= {arXiv preprint arXiv:1208.0426},
year = {2015}
}
Comments
Submitted on May 7 2012 to Physical Review Special Topics - Accelerators and Beams