Steering of high energy electron beam in laser plasma accelerators

TL;DR

This paper presents a novel laser-based method for continuously steering high-energy electron beams in laser plasma accelerators by manipulating laser pulse-front-tilt, enabling precise control for advanced applications.

Contribution

It introduces a new technique using laser group delay dispersion and pulse-front-tilt to steer electron beams, enhancing beam control in plasma accelerators.

Findings

Effective beam steering via laser GDD manipulation.

The deviation angle matches laser pulse-front-tilt.

Impact of PFT on electron beam quality analyzed.

Abstract

By using Dazzler system and tilting compressor grating, we provide an effective way of using the laser group delay dispersion (GDD) to continuously steer the high energy electron beam which is accelerated by asymmetric laser-wakefield. The deviation angle of electrons is as the same as the angular chirped laser pulse from its initial optical axis, which is determined by the laser pulse-front-tilt (PFT). This unique method can be continuously used to control over the pointing direction of electron-pulses to the requisite trajectories, especially for the alignment sensitive devices such as electron-positron collider or undulator. Besides, the effect of PFT on the qualities of electron beam has been investigated.