Controlled electron injection facilitated by nanoparticles for laser wakefield acceleration.

Abstract:

:We propose a novel injection scheme for laser-driven wakefield acceleration in which controllable localized electron injection is obtained by inserting nanoparticles into a plasma medium. The nanoparticles provide a very confined electric field that triggers localized electron injection where nonlinear plasma waves are excited but not sufficient for background electrons self-injection. We present a theoretical model to describe the conditions and properties of the electron injection in the presence of nanoparticles. Multi-dimensional particle-in-cell (PIC) simulations demonstrate that the total charge of the injected electron beam can be controlled by the position, number, size, and density of the nanoparticles. The PIC simulation also indicates that a 5-GeV electron beam with an energy spread below 1% can be obtained with a 0.5-PW laser pulse by using the nanoparticle-assisted laser wakefield acceleration.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Cho MH,Pathak VB,Kim HT,Nam CH

doi

10.1038/s41598-018-34998-0

subject

Has Abstract

pub_date

2018-11-16 00:00:00

pages

16924

issue

1

issn

2045-2322

pii

10.1038/s41598-018-34998-0

journal_volume

8

pub_type

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