Acceleration and focusing of positron bunch in a dielectric waveguide accelerator with homogeneous plasma in transport channel

TL;DR

This study demonstrates through numerical simulations that positron bunches can be simultaneously accelerated and focused in a plasma dielectric wakefield accelerator with a homogeneous plasma-filled channel, influenced by channel size and waveguide length.

Contribution

It introduces a novel simulation analysis of positron acceleration and focusing in a plasma dielectric wakefield accelerator with a homogeneous plasma channel.

Findings

Simultaneous acceleration and focusing of positron bunches are achievable.

Positron transport depends on vacuum channel size and waveguide length.

Numerical PIC simulations confirm the feasibility of this acceleration method.

Abstract

The paper presents the results of numerical PIC-simulation of positron bunch focusing when acceleration in a plasma dielectric wakefield accelerator. The wakefield was excited by drive electron bunch in quartz dielectric tube, embedded in cylindrical metal waveguide. The internal area of dielectric tube has been filled with radially homogeneous plasma having in general case the vacuum channel along waveguide axis. Results of numerical PIC simulation have shown that it is possible a simultaneous acceleration and focusing of test positron bunch in the wakefield. The dependence of transport and acceleration of positron bunch on size of vacuum channel and waveguide length is studied.