Speaker
Description
Next-generation storage-ring light sources combine higher-bandwidth fast orbit feedback (FOFB) systems with synchrotron frequencies that may lie within the FOFB bandwidth. Coupled-bunch mode-zero oscillations driven by RF phase and amplitude noise can produce horizontal orbit motion within the controllable frequency range. Existing work exploits the near orthogonality between the dispersion orbit associated with this motion and the betatron orbit space, allowing the disturbance to be extracted from beam-position measurements and corrected independently through the main low-level-RF phase set-point. This work instead investigates a fully integrated formulation in which magnetic and RF actuators are coordinated within a single multivariable FOFB design, and highlights advantages of this integrated approach. Next-generation systems already combine slow, high-authority corrector magnets with fast, lower-authority correctors through multimodal factorisations. We extend this architecture to RF phase actuation by treating it as an additional high-bandwidth actuator that accounts for its distinct spatial response.
| Abstract Classification | Control Architecture and Strategies |
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