Title :
Beam-beam modulational diffusion in 2 1/2 dimensions
Author :
Satogata, T. ; Peggs, S.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
Qualitative theoretical predictions for single particle modulational diffusion in 2 1/2 dimensions are compared with simulation results. Typical Fermilab Tevatron parameters are used for two beam-beam interactions under the influence of tune modulation created by synchrotron oscillations. When sideband overlap occurs on a pure one-dimensional resonance, diffusive growth is predicted and observed in the other transverse dimension. However exponential amplitude growth is observed in simulation instead of classically predicted root-time diffusive growth. Exponential growth rates are measured in particle tracking and possible impact on Tevatron luminosity upgrades is mentioned
Keywords :
beam handling techniques; particle beam diagnostics; proton accelerators; synchrotrons; tuning; Fermilab Tevatron parameters; Tevatron luminosity upgrades; beam-beam interactions; beam-beam modulational diffusion; diffusive growth; exponential amplitude growth; one-dimensional resonance; particle tracking; root-time diffusive growth; sideband overlap; simulation results; single particle modulational diffusion; synchrotron oscillations; transverse dimension; tune modulation; Frequency; Laboratories; Noise level; Optical modulation; Particle accelerators; Particle measurements; Particle tracking; Predictive models; Stochastic resonance; Synchrotrons;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.308946
