Document Type
Conference Paper
Publication Date
2026
DOI
10.18429/JACoW-IPAC2026-MOP6381
Publication Title
17th International Particle Accelerator Conference
Pages
510-513
Conference Name
17th International Particle Accelerator Conference, 17-22 May 2025, Deauville, France
Abstract
At Jefferson Lab, the Continuous Electron Beam Accelerator (CEBAF) features a unique design with two linear accelerators and two arc sections allowing for multiple turns of the electron beam, as well as four experimental end stations. This topology leads to increased beam losses, especially in the spreader and recombiner regions connecting the arcs to the LINACs and in the extraction regions connecting the experimental end stations to the accelerator. These losses result in equipment activation and operational interruptions. Recent upgrades to the facility’s diagnostic systems, including the addition of xenon ion chambers, have provided higher-resolution data regarding these loss events. Building on this improved observational capability, we are developing a simulation framework using optics codes and the Geant4-based BDSIM to model beam extinction and halo formation in these regions. This work aims to correlate simulation results with experimental data to isolate the causes of beam loss and inform future machine tuning strategies. We present a summary of conclusions drawn from recent operational studies and outline a plan to model the beam loss and validate the simulations.
Rights
© 2026 by JACoW
Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license. Any further distribution of this work must maintain attribution to the authors, the published article's title, publisher, and DOI.
Original Publication Citation
Matthews, C., Benesch, J., Bodenstein, R. M., Freeman, B., Moser, D., Turner, D., Price, K., Samari, J., & Terzić, B. (2026). Exploring causes of beam loss at CEBAF. 17th International Particle Accelerator Conference. Advance online publication. https://www.ipac26.org/prepress/doi/jacow-ipac2026-mop6381/index.html
ORCID
0000-0002-9646-8155 (Terzić)
Repository Citation
Matthews, C.; Benesch, J.; Bodenstein, R. M.; Freeman, B.; Moser, D.; Turner, D.; Price, K.; Samari, J.; and Terzić, B., "Exploring Causes of Beam Loss at CEBAF" (2026). Physics Faculty Publications. 1070.
https://digitalcommons.odu.edu/physics_fac_pubs/1070