Carrier-Envelope Phase Controlled Electron Injection into a Laser-Wakefield Accelerator

TL;DR

This paper presents a novel method for controlling electron injection in laser wakefield accelerators using carrier-envelope phase manipulation of a single-cycle laser pulse, enabling precise control over electron bunch properties.

Contribution

It introduces a new injection scheme combining single-cycle and multi-cycle laser pulses, allowing independent control of electron injection dynamics via CEP tuning.

Findings

Controlled electron injection achieved through CEP adjustment.

Enhanced electron bunch quality and spatial profile control.

Demonstrated feasibility of phase-controlled wakefield modulation.

Abstract

Single cycle laser pulse propagating inside a plasma causes controllable asymmetric plasma electron expulsion from laser according to laser carrier envelope phase (CEP) and forms an oscillating plasma bubble. Bubble's transverse wakefield is modified, exhibiting periodic modulation. Injection scheme for a laser wakefield accelerator combining a single cycle low frequency laser pulse and a many cycle high frequency laser pulse is proposed. The co-propagating laser pulses form a transversely oscillating wakefield which efficiently traps and accelerates electrons from background plasma. By tuning the initial CEP of the single cycle laser pulse, injection dynamics can be modified independently of the many cycle pulse, enabling control of electron bunches' spatial profile.