With the high current physical operations of the upgraded Beijing Electron–Positron Collider (BEPCII), thresholds on collision luminosity and beam current have been presented due to various factors such as collision background, noise, equipment stability under high power operation, and so on. One of the most serious influences on beam dynamics was beam instability which has been clearly...
"Pulse Picking by Resonant Excitation" (PPRE), first developed by Holldack et al.* at BESSY in 2014, is a beam operation method that simultaneously serves standard synchrotron users and ‘timing mode’ users who require precise X-ray pulse timing from single bunches. PPRE selectively enlarges one electron bunch's (horizontal) emittance through resonant excitation, creating an enlarged X-ray...
The KEK e⁺/e⁻ Linac supplies electron beams to SuperKEKB HER, PF, and PF-AR, and positron beams to SuperKEKB LER. We utilize machine learning for both online beam tuning and offline data analysis. Machine learning based on Bayesian optimization has been employed to improve and maintain beam quality, contributing to the enhancement and stabilization of beam injection efficiency into SuperKEKB...
