Work

Tracking with wakefields in dielectric laser acceleration grating structures

Year: 2020

Type: article

Abstract: Due to the tiny apertures of dielectric laser acceleration grating structures within the range of the optical wavelength, wakefields limit the bunch charge for relativistic electrons to a few femtocoulomb. In this paper, we present a wakefield upgrade of our six-dimensional tracking scheme DLAtrack6D in order to analyze these limitations. Simulations with CST Studio Suite provide the wake functions to calculate the kicks within each tracking step. Scaling laws and the dependency of the wake on geometrical changes are calculated. The tracking with wakefields is applied to beam and structure parameters following recently performed and planned experiments. We compare the results to analytical models and identify intensity limits due to the transverse beam breakup and strong head-tail instability. Furthermore, we reconstruct phase advance spectrograms and use them to analyze possible stabilization mechanisms.

Source: Physical Review Accelerators and Beams

DOI: 10.1103/physrevaccelbeams.23.054402

Authors: Thilo Egenolf, Uwe Niedermayer, Oliver Boine-Frankenheim

Institution: Technische Universität Darmstadt

Language: English

Topic: Particle Accelerators and Free-Electron Lasers

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

Funders: Gordon and Betty Moore Foundation, Bundesministerium für Bildung und Forschung

Awards: G691827583, Accelerator-on-a-Chip