Attosecond betatron radiation pulse train
Journal article, 2020

High-intensity X-ray sources are essential diagnostic tools for science, technology and medicine. Such X-ray sources can be produced in laser-plasma accelerators, where electrons emit short-wavelength radiation due to their betatron oscillations in the plasma wake of a laser pulse. Contemporary available betatron radiation X-ray sources can deliver a collimated X-ray pulse of duration on the order of several femtoseconds from a source size of the order of several micrometres. In this paper we demonstrate, through particle-in-cell simulations, that the temporal resolution of such a source can be enhanced by an order of magnitude by a spatial modulation of the emitting relativistic electron bunch. The modulation is achieved by the interaction of the that electron bunch with a co-propagating laser beam which results in the generation of a train of equidistant sub-femtosecond X-ray pulses. The distance between the single pulses of a train is tuned by the wavelength of the modulation laser pulse. The modelled experimental setup is achievable with current technologies. Potential applications include stroboscopic sampling of ultrafast fundamental processes.

Author

Vojtech Horny

Chalmers, Physics, Subatomic and Plasma Physics

Czech Academy of Sciences

Miroslav Krůs

Czech Academy of Sciences

Wenchao Yan

Shanghai Jiao Tong University

Czech Academy of Sciences

Tünde Fülöp

Chalmers, Physics, Subatomic, High Energy and Plasma Physics

Scientific Reports

2045-2322 (ISSN)

Vol. 10 1 15074-

Running away and radiating (PLASMA)

European Commission (EC), 2015-10-01 -- 2020-09-30.

Subject Categories

Accelerator Physics and Instrumentation

Atom and Molecular Physics and Optics

Other Physics Topics

DOI

10.1038/s41598-020-72053-z

PubMed

32934289

More information

Latest update

10/13/2020