Simulations of beam-beam and beam-wire interactions in RHIC

TL;DR

This paper presents simulations and experimental measurements of beam-wire interactions in RHIC, focusing on their effects on beam stability, emittance, and luminosity, and compares simulation results with actual collider data.

Contribution

It introduces a parallelized weak-strong simulation code to model beam-wire interactions and validates it against RHIC experimental data from 2007 and 2008.

Findings

Simulation results agree with experimental measurements

Beam-wire interactions significantly affect beam loss rates

The model helps understand long-range beam-beam effects in colliders

Abstract

The beam-beam interaction is one of the dominant sources of emittance growth and luminosity lifetime deterioration. A current carrying wire has been proposed to compensate long-range beam-beam effects in the LHC and strong localized long-range beam-beam effects are experimentally investigated in the RHIC collider. Tune shift, beam transfer function, and beam loss rate are measured in dedicated experiments. In this paper, we report on simulations to study the effect of beam-wire interactions based on diffusive apertures, beam loss rates, and beam transfer function using a parallelized weak-strong beam simulation code (bbsimc). The simulation results are compared with measurements performed in RHIC during 2007 and 2008.