ICAP-2002 Abstracts and Posters

ICAP 2002 Abstracts and Posters

Beambeam3D: A Parallel Program for Strong-Strong Beam-Beam Simulation

Abstract

In this paper, we report on the development of a parallel program to simulate the strong-strong beam-beam interaction in high energy storage-ring colliders. The electromagnetic beam-beam forces have been calculated self-consistently for arbitrary distributions during each collision. A multiple-slice model has been used to account for finite bunch length effects. A new shifted Green function method has been developed to efficiently handle the long-range interaction during parasitic collisions. The code also includes a Lorentz boost and rotation to treat collisions with finite crossing angle. In addition to the strong-strong capability, the code also has options to perform simulations using a weak-strong formulation or a Gaussian approximation. In the parallel implementation, a particle-based decomposition has been used to achieve a good load balance. In this paper we describe the BeamBeam3D code, present example simulations, and describe the code's performance.

Ji Qiang, Miguel A. Furman, Robert D. Ryne

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