IBIC2025 - 14th International Beam Instrumentation Conference

Isolating the light of a single bunch: determining the viability of operating vertical-plane ‘Pulse Picking by Resonant Excitation’ at Diamond-II to serve timing mode users

TUBC01

9 Sept 2025, 11:20

20m

Teaching Hub 502

Contributed Oral Presentation MC06: Feedback Systems and Beam Stability TUB

Speaker

Seb Wilkes (University of Oxford)

Description

Pulse Picking by Resonant Excitation (PPRE) enables synchrotron facilities to provide single-bunch light for timing users without interrupting multi-bunch operation*. We report the first vertical-plane PPRE tests at Diamond using the Multi-Bunch Feedback system, achieving vertical bunch-size growth and measurable X-ray enlargement. A simple novel optimisation improved PPRE purity by reducing the baseline emittance. Beyond readily-available diagnostics, we demonstrate how crystallographic diffraction can be used as a user-relevant method to characterise PPRE with statistically significant evidence of isolating a single excited bunch. Together, these methods provide a practical and user-orientated framework for synchrotron facilities considering similar timing-mode capabilities.

Funding Agency

Diamond Light Source; John Adam's Institute

Footnotes

• doi: 10.1038/ncomms5010