Abstract
Coupled-bunch instabilities in a circular machine are effectively simulated using a longitudinal-phase-space tracking code (ESm-smcapsE). Two damping schemes based on intrabunch (Landau cavity) and bunch-to-bunch synchrotron tune spread are also examined. Some comparison of the tune spread induced via these schemes (as a measure of introduced Landau damping) is done in both cases. Finally, a simulation of active damping of the coupled-bunch instability through radial-position feedback is explored as another possible cure.
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