IBIC2026 - 15th International Beam Instrumentation Conference

Turn-resolved bunch profile measurement using laser wire at spallation neutron source

TUP034

1 Sept 2026, 16:20

2h

Ballroom C (Whistler Conference Centre)

Poster Presentation MC05: Longitudinal Diagnostics and Synchronization Tuesday Poster Session 2

Speaker

Yun Liu (Oak Ridge National Laboratory)

Description

We experimentally investigated turn-resolved longitu-dinal bunch dynamics in the Spallation Neutron Source (SNS) linac using laser-wire diagnostics. The measure-ments revealed distinct turn-to-turn variations in both the rms bunch width and bunch-center delay. These re-sults demonstrate a novel capability of laser-wire diag-nostics to resolve the longitudinal properties of the oper-ational beam on a turn-by-turn basis, providing direct access to beam-dynamics information that was previous-ly inaccessible.

Footnotes

Y. Liu et. al., “Nonintrusive measurement of time-resolved emittances of 1-GeV operational hydrogen ion beam using a laser comb,” DOI: https://doi.org/10.1103/PhysRevAccelBeams.23.102806.
Y. Liu et. al., “Longitudinal bunch profile measurement of operational H- beam using laser wire and virtual slit,” DOI: 10.1103/PhysRevAccelBeams.26.042801.

Funding Agency

ORNL is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy.