Beam-beam simulation code BBSIM for particle accelerators

TL;DR

This paper introduces BBSIM, a highly efficient, parallelized simulation code for modeling beam-beam interactions in particle accelerators, incorporating various force calculation methods and applied to real collider scenarios.

Contribution

It presents a novel, comprehensive simulation tool that combines multiple force calculation techniques for accurate beam-beam interaction modeling in high energy colliders.

Findings

Validated BBSIM against Fermilab Tevatron measurements.

Demonstrated effectiveness of wire and electron beam compensation schemes.

Achieved efficient parallel performance in large-scale simulations.

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 weak-strong 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 beam-beam 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 beam-beam 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.