Beam-Beam Interaction in Novel, Very High Luminosity Parameter Regimes

TL;DR

This paper discusses the challenges and recent modeling advancements for beam-beam interactions in future high luminosity colliders operating in novel parameter regimes with ultra-low emittance and high bunch charge.

Contribution

It introduces new modeling tools capable of analyzing beam-beam effects in regimes with ultra-low emittance and large Piwinski angles, including experimental tests with crab waist collisions.

Findings

Modeling tools successfully simulate beam-beam interactions in high luminosity regimes.

Crab waist collision tests in DAFNE demonstrate the effectiveness of new techniques.

Insights into beam-beam effects guide future collider design.

Abstract

In order to achieve luminosities significantly higher than in existing machines, future storage-ring based colliders will need to operate in novel parameter regimes combining ultra-low emittance, large Piwinski angle and high bunch charge; implementation of techniques such as a "crab waist" will add further challenges. Understanding the beam-beam interaction in these situations will be essential for the design of future very high luminosity colliders. Recent developments in modeling tools for studying beam-beam effects, capable of investigating the relevant regimes, will be discussed and examples, including tests with crab waist collisions in DAFNE, will be presented.