Proposal for a Damping-Ring-Free Electron Injector for Future Linear Colliders

TL;DR

This paper proposes a novel damping-ring-free electron injector for future linear colliders, utilizing phase-space manipulation to produce flat beams, reducing complexity and cost compared to traditional damping ring designs.

Contribution

It introduces a new electron injector design that eliminates damping rings by employing cross-plane phase-space manipulation techniques.

Findings

Achieves beam parameters comparable to damping ring outputs.

Demonstrates reduced system complexity and cost.

Analyzes sensitivity to jitter and effects on spin polarization.

Abstract

The current designs of future electron-positron linear colliders incorporate large and complex damping rings to produce asymmetric beams for beamstrahlung suppression. Here we present the design of an electron injector capable of delivering flat electron beams with phase-space partition comparable to the electron-beam parameters produced downstream of the damping ring in the proposed international linear collider (ILC) design. Our design does not employ a damping ring but is instead based on cross-plane phase-space-manipulation techniques. The performance of the proposed configuration, its sensitivity to jitter along with its impact on spin-polarization is investigated. The proposed paradigm could be adapted to other linear collider concepts under consideration and offers a path toward significant cost and complexity reduction.