Proceedings of the 9th International Particle Accelerator Conference
9th International Particle Accelerator Conference, April 29-May 4, 2018, Vancouver, Canada
Particle bunches traveling in a ring can excite wakefields inside any radio-frequency element present. These electromagnetic modes can resonate long enough and interact with subsequent passing bunches. A coherent oscillation between bunches can quickly become an instability and needs to be addressed. The Jefferson Lab electron ion collider has a large 50 mrad crossing angle and thus relies on bunch crabbing to achieve high luminosity. Bunch crabbing is done with compact superconducting rf dipole cavities. We study coupled bunch oscillations driven by the higher order modes of multicell RFD crab cavities under study for JLEIC, we calculate the instability growth time assuming a symmetric beam spectrum, identify the HOMs driving the instability and discuss mitigation measures.
Copyright 2018 by JACoW, Geneva, Switzerland
Published under a Creative Commons Attribution 3.0 Unported (CC BY 3.0) license.
Original Publication Citation
Sosa Guitron, S. I., De Silva, S. U., Delayen, J. R., Li, R., Morozov, V. S., & Park, H. (2018). Coupled bunch instability from JLEIC crab cavity higher order modes. In S. Koscielniak, T. Satogata, V.R.W. Schaa, J. Thomson (Eds.), Proceedings of the 9th International Particle Accelerator Conference (pp. 3392-3394). JACoW. https://doi.org/10.18429/JACoW-IPAC2018-THPAK070
0000-0002-4809-9439 (De Silva)
Sosa, S. I.; Li, R.; Park, H.; De Silva, S.; Morozov, V. S.; Delayen, J. R.; Koscielniak, S. (Ed.); Satogata, T. (Ed.); Schaa, V.R.W. (Ed.); and Thomson, J. (Ed.), "Coupled Bunch Instability from JLEIC Crab Cavity Higher Order Modules" (2018). Physics Faculty Publications. 724.