First order sensitivity analysis of electron acceleration in dual grating type dielectric laser accelerator structures

F Mayet,W Kuropka,U Dorda,R Assmann

doi:10.1088/1742-6596/1067/4/042003

Abstract

Symmetrically driven dual-grating type DLA (Dielectric Laser Accelerator) linac structures allow for in-channel electric field gradients on the order of GV/m at optical wavelengths. In this work we study the sensitivity of important final beam parameters like mean energy, energy spread and transverse emittance on DLA drive laser as well as input beam parameters. To this end a fast specialized particle tracking code (DLATracker) is used to compute the so called first order sensitivity indices based on a large number of Monte Carlo simulation runs of an exemplary external injection based DLA experiment. The results of this work point out important stability constraints on the drive laser setup and the externally injected electron beam.

Highlights

The concept of dielectric laser acceleration (DLA) has gained growing attention in the past years due to the high achievable electric field gradients of the order of ∼GV/m at optical wavelengths [1, 2]
Driven dual-grating type DLA (Dielectric Laser Accelerator) linac structures allow for in-channel electric field gradients on the order of GV/m at optical wavelengths
In this work we study the sensitivity of important final beam parameters like mean energy, energy spread and transverse emittance on DLA drive laser as well as input beam parameters

Summary

Introduction

The concept of dielectric laser acceleration (DLA) has gained growing attention in the past years due to the high achievable electric field gradients of the order of ∼GV/m at optical wavelengths [1, 2]. In this work we study the sensitivity of important final beam parameters like mean energy, energy spread and transverse emittance on DLA drive laser as well as input beam parameters. To this end a fast specialized particle tracking code (DLATracker) is used to compute the so called first order sensitivity indices based on a large number of Monte Carlo simulation runs of an exemplary external injection based DLA experiment.

Results

Conclusion