Proceedings of the 8th International Particle Accelerator Conference
International Particle Accelerator Conference (8th)
Future machines such as the electron-ion colliders (JLEIC), linac-ring machines (eRHIC) or LHeC are particularly sensitive to beam-beam effects. This is the limiting factor for long-term stability and high luminosity reach. The complexity of the non-linear dynamics makes it challenging to perform such simulations which require millions of turns. Until recently, most of the methods used linear approximations and/or tracking for a limited number of turns. We have developed a framework which exploits a massively parallel Graphical Processing Units (GPU) architecture to allow for tracking millions of turns in a sympletic way up to an arbitrary order and colliding them at each turn. The code is called GHOST for GPU-accelerated High-Order Symplectic Tracking. As of now, there is no other code in existence that can accurately model the single-particle non-linear dynamics and the beam-beam effect at the same time for a large enough number of turns required to verify the long-term stability of a collider. Our approach relies on a matrix-based arbitrary-order symplectic particle tracking for beam transport and the Bassetti-Erskine approximation for the beam-beam interaction.
Original Publication Citation
Terzić, B., Arumugam, K., Cotnoir, C., Godunov, A., Lin, F., Majeti, R.,... & Satogata, T. (2017, May). Long-Term Simulations of Beam-Beam Dynamics on GPUs. In Proceedings of the 8th International Particle Accelerator Conference (IPAC'17), Copenhagen, Denmark, May 14-19, 2017 (pp. 3918-3920). https://doi.org/10.18429/JACoW-IPAC2017-THPABO86/
0000-0002-9646-8155 (Terzić), 0000-0001-7929-9006 (Stefani), 0000-0002-9892-6869 (Godunov), 0000-0002-8521-8783 (Lin), 0000-0002-8081-3815 (Satogata)
Terzić, B.; Arumugam, K.; Majeti, R.; Cotnoir, C.; Stefani, M.; Ranjan, D.; Godunov, A.; Morozov, V.; Zhang, H.; Lin, F.; Roblin, Y.; Nissen, E.; and Satogata, T., "Long-Term Simulations of Beam-Beam Dynamics on GPUs" (2017). Physics Faculty Publications. 262.