Generation of attosecond electron bunches and x-ray pulses from few-cycle femtosecond laser pulses
Artikel i vetenskaplig tidskrift, 2021

Laser-plasma electron accelerators can be used to produce high-intensity x-rays, as electrons accelerated in wakefields emit radiation due to betatron oscillations. Such x-ray sources inherit the features of the electron beam; sub-femtosecond electron bunches produce betatron sources of the same duration, which in turn allow probing matter on ultrashort time scales. In this paper we show, via Particle-in-Cell simulations, that attosecond electron bunches can be obtained using low-energy, ultra-short laser beams both in the self-injection and the controlled injection regimes at low plasma densities. However, only in the controlled regime does the electron injection lead to a stable, isolated attosecond electron bunch. Such ultrashort electron bunches are shown to emit attosecond x-ray bursts with high brilliance.

sub-femtosecond electron beams

betatron radiation

PIC simulation

laser wakefield acceleration


Julien Ferri

Göteborgs universitet

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

Vojtech Horny

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

Tünde Fülöp

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

Plasma Physics and Controlled Fusion

0741-3335 (ISSN) 1361-6587 (eISSN)

Vol. 63 4 045019

Skena och skina

Europeiska kommissionen (EU) (EC/H2020/647121), 2015-10-01 -- 2020-09-30.


Acceleratorfysik och instrumentering

Atom- och molekylfysik och optik

Fusion, plasma och rymdfysik



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