Speaker
Description
Beam orbit stability is a critical requirement for fourth-generation synchrotron radiation facilities. An initial evaluation for the Korea-4GSR quantified expected orbit disturbances from ground vibration, magnet current ripple, and energy oscillations. Since that baseline study, additional measurements and refined models have enabled a more accurate assessment. Newly acquired ground-motion data provide updated vibration spectra affecting magnet and girder motion. Orbit fluctuations induced by the EPU and the canted-ID configuration have been characterized and incorporated into the analysis. Vacuum-chamber vibration, previously unaccounted for, has also been measured to assess mechanical coupling to the beam. Using these updated disturbance sources, revised orbit-stability predictions have been obtained through beam-dynamics simulations. The study identifies the dominant contributors under current design conditions and discusses implications for orbit-feedback performance and mechanical design optimization.
| Paper status | Resubmitted proceeding files received and assigned to an editor. Accepted. |
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