Document Type

Conference Paper

Publication Date




Publication Title

Proceedings of the 12th International Particle Accelerator Conference



Conference Name

12th International Particle Accelerator Conference, May 24-28th, 2021, Campinas, Brazil


The COmpact Machine for Beam-beam Interactions in Non-Equilibrium systems (COMBINE) is a proposed, dedicated, beam-beam test facility. The base design would make use of a pair of identical octagonal rings (2.5 meters per side) one rotated 180 degrees from the other, meeting at their common interaction point. These would be fed by an electron gun producing up to 125 keV electrons. The low energy will allow for beam-beam tune shifts commensurate with existing colliders, some linac-ring type systems, and will also allow for an exploration of the predicted effects of gear-changing, which would be performed using a variable pathlength scheme. The low energy, and small size will allow for cost effective research, simulation code benchmarking, as well as training opportunities for students.


© 2021 by JACoW

Published under a Creative Commons Attribution 3.0 Unported (CC BY 3.0) license.

Original Publication Citation

Nissen, E., Krafft, G., Delayen, J. (2021) A proposed beam-beam test facility COMBINE. In L. Liu, J. Byrd, R. Neuenschwander, R. Picoreti, & V.R.W. Schaa (Eds.), Proceedings of the 12th International Particle Accelerator Conference (3802-3804). Joint Accelerator Conferences Website.


0000-0002-0328-5828 (Krafft)