Transverse modes and instabilities of a bunched beam with space charge and resistive wall impedance

Details Transverse modes and instabilities of a bunched beam with space charge and resistive wall impedance Transverse modes and instabilities of a bunched beam with space charge and resistive wall impedance

2012-01-24

arxiv.org/abs/1201.5110v1

Physics

Accelerator Physics

10 pp

Scientific paper

Transverse instability of a bunched beam is investigated with synchrotron oscillations, space charge, and resistive wall wakefield taken into account. Boxcar model is used for all-round analysis, and Gaussian distribution is invoked for details. The beam spectrum, instability growth rate and effects of chromaticity are studied in a wide range of parameters, both with head-tail and collective bunch interactions included. Effects of the internal bunch oscillations on the of collective instabilities is investigated thoroughly. Landau damping caused by the space charge tune spread is discussed, and the instability thresholds of different modes of Gaussian bunch are estimated.

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