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A modal decomposition is used to study the coupled longitudinal motion of electron bunches in a storage ring. The decomposition allows the simultaneous measurement o f g r o wth rates and feedback induced damping rates of all unstable beam modes via a time-domain transient technique. The damping rates of naturally stable modes are measured via a related(More)
The proposed next generation accelerator and synchrotron light facilities will require active feedback systems to control multi-bunch instabilities. These feedback systems must operate in machines with thousands of circula,ting bunches and with short (2-4 ns) interbunch intervals. The functional requirements for transverse (betatron) and longitudinal(More)
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