Beamstrahlung-enhanced disruption in beam-beam interaction

TL;DR

This paper investigates how beamstrahlung radiation reaction influences particle beam dynamics during beam-beam interactions, revealing enhanced focusing effects and disruption parameters relevant for future high-current lepton colliders.

Contribution

It provides an analytical model including radiation reaction effects, verifies it with simulations, and explores implications for collider beam stability and focusing.

Findings

Beamstrahlung significantly enhances beam focusing.

Analytical solutions including radiation reaction are derived.

The disruption parameter is affected by quantum and classical regimes.

Abstract

The radiation reaction (beamstrahlung) effect on particle dynamics during interaction of oppositely charged beams is studied. It is shown that the beam focusing can be strongly enhanced due to beamstrahlung. An approximate analytical solution of the motion equation including the radiation reaction force is derived. The disruption parameter is calculated for classical and quantum regime of beamstrahlung. The analytical model is verified by QED-PIC simulations. The model for head-on collision of long beams undergoing a number of betatron oscillation during interaction is also developed. It is demonstrated that the beamstrahlung-enhanced disruption effect can play a significant role in future lepton colliders with high-current particle beams.