Positron acceleration via laser-augmented blowouts in two-column plasma structures

TL;DR

This paper introduces a novel method for positron acceleration using a laser-augmented plasma structure, demonstrating effective long-distance acceleration through simulations and analytical modeling.

Contribution

It presents a new plasma-based acceleration scheme with a two-column structure and analytical expressions for fields, advancing positron acceleration techniques.

Findings

Effective positron acceleration over long distances demonstrated in simulations.

Analytical expressions for accelerating and focusing fields derived.

Equilibrium lines identified for optimal witness bunch acceleration.

Abstract

We propose a setup for positron acceleration consisting of an electron driver and a laser pulse creating a two-fold plasma column structure. The resulting wakefield is capable of accelerating positron bunches over long distances even when evolution of the driver is considered. The scheme is studied by means of particle-in-cell simulations. Further, the analytical expression for the accelerating and focusing fields are obtained, showing the equilibrium lines along which the witness bunch is accelerated.