Feedback Systems for Multibunch Beam Diagnostics and Instabilities Suppression
DOI:
https://doi.org/10.23732/CYRCP-2018-001.39Keywords:
Accelerators, feedback, instability, impedance.Abstract
Transverse instabilities in storage rings can limit both beam and single bunch currents. Vacuum chamber impedance can be source of instabilities for positive and negative charge stored beams and also parasitic e-clouds can produce other undesirable effects for positive charge stored beams. Transverse bunch-by-bunch feedback systems are implemented in storage rings as active devices for instability suppression and for state of art beam diagnostics. In this paper the following topics are discussed: basics on bunch-by bunch feedback for lepton storage ring; beam diagnostics by using feedback; new feedback design proposed for the proposed electron-positron Future Circular Collider (FCC-ee).
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