Beam-beam simulation code BBSIM for particle accelerators

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Abstract

A highly efficient, fully parallelized, six-dimensional tracking model for simulating interactions of colliding hadron beams in high energy ring colliders and simulating schemes for mitigating their effects is described. The model uses the weakstrong approximation for calculating the head-on interactions when the test beam has lower intensity than the other beam, a look-up table for the efficient calculation of long-range beambeam forces, and a self-consistent Poisson solver when both beams have comparable intensities. A performance test of the model in a parallel environment is presented. The code is used to calculate beam emittance and beam loss in the Tevatron at Fermilab and compared with measurements. We also present results from the studies of two schemes proposed to compensate the beambeam interactions: (a) the compensation of long-range interactions in the Relativistic Heavy Ion Collider (RHIC) at Brookhaven and the Large Hadron Collider (LHC) at CERN with a current-carrying wire, (b) the use of a low-energy electron beam to compensate the head-on interactions in RHIC. © 2011 Elsevier B.V. All rights reserved.

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Kim, H. J., & Sen, T. (2011). Beam-beam simulation code BBSIM for particle accelerators. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 642(1), 25–35. https://doi.org/10.1016/j.nima.2011.03.059

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