Advancing Electron Injection Dynamics and Mitigation Approaches in the Electron-Ion Collider Swap-out Injection Scheme

TL;DR

This paper investigates electron injection dynamics in the Electron-Ion Collider's swap-out scheme, focusing on stability challenges and mitigation strategies to improve collider performance.

Contribution

It introduces simulation-based analysis of emittance growth issues and proposes mitigation approaches for the EIC's injection scheme.

Findings

Identified proton emittance growth during injection

Observed electron emittance blowup in simulations

Proposed mitigation strategies to enhance stability

Abstract

The Electron-Ion Collider (EIC) will use swap-out injection scheme for the Electron Storage Ring (ESR) to overcome limitations in polarization lifetime. However, the pursuit of highest luminosity with the required 28 nC electron bunches encounters stability challenges in the Rapid Cycling Synchrotron (RCS). One method is to inject multiple RCS bunches into a same ESR bucket. In this paper we perform simulation studies investigating proton emittance growth and electron emittance blowup in this injection scheme. Mitigation strategies are explored. These findings promise enhanced EIC stability and performance, shaping potential future operational improvements.