Terzić, B.
Arumugam, A.
Cotnoir, C.M.
Godunov, A.L.
Lin, F.
Majeti, R.T.
Morozov, V.S.
Nissen, E.W.
Ranjan, D.
Roblin, Y.
Satogata, T.
Stefani, M.
Zhang, H.
Zubair, M.
Long-Term Simulations of Beam-Beam Dynamics on GPUs
JACoW
Geneva, Switzerland
978-3-95450-182-3
10.18429/JACoW-IPAC2017-THPAB086
English
3918-3920
THPAB086
GPU
simulation
collider
beam-beam-effects
electron
Contribution to a conference proceedings
2017
2017-05
http://dx.doi.org/10.18429/JACoW-IPAC2017-THPAB086
http://jacow.org/ipac2017/papers/thpab086.pdf
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.