An electron injector for the Electron-Ion Collider based on proton-driven plasma wakefield acceleration

TL;DR

This paper proposes a proton-driven plasma wakefield acceleration scheme for electron injection in the Electron-Ion Collider, utilizing existing RHIC proton bunches and current electron sources.

Contribution

It introduces a novel electron injector design based on proton-driven plasma wakefield acceleration tailored for the EIC.

Findings

Achieves an electron polarization of approximately 70%.

Predicts a luminosity of 1×10^{34} cm^{-2}s^{-1}.

Design parameters are feasible with current technology.

Abstract

We describe an electron bunch injector scheme based on proton-driven plasma wakefield acceleration for the Electron-Ion Collider. The proton bunches needed to drive the plasma wake are taken from the existing Blue-Ring of RHIC. The polarized electron source is taken from the current EIC design. We describe the different elements making up the injection scheme and give an estimate for the performance. Our initial study indicates that the design parameters of the EIC are within reach when accelerating the electron bunches in the proton-driven plasma wake, with average polarization of ~70% and a luminosity of 1e34 cm$^{-2}$s$^{-1}$.