Relativistic electron beams driven by kHz single-cycle light pulses

Abstract : Laser-plasma acceleration(1,2) is an emerging technique for accelerating electrons to high energies over very short distances. The accelerated electron bunches have femtosecond duration(3,4), making them particularly relevant for applications such as ultrafast imaging(5) or femtosecond X-ray generation(6,7). Current laser-plasma accelerators deliver 100 MeV (refs 8-10) to GeV (refs 11, 12) electrons using Joule-class laser systems that are relatively large in scale and have low repetition rates, with a few shots per second at best. Nevertheless, extending laser-plasma acceleration to higher repetition rates would be extremely useful for applications requiring lower electron energy. Here, we use single-cycle laser pulses to drive high-quality MeV relativistic electron beams, thereby enabling kHz operation and dramatic downsizing of the laser system. Numerical simulations indicate that the electron bunches are only similar to 1 fs long. We anticipate that the advent of these kHz femtosecond relativistic electron sources will pave the way to applications with wide impact, such as ultrafast electron diffraction in materials(13,14) with an unprecedented sub-10 fs resolution(15).
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Nature Photonics, Nature Publishing Group, 2017, 11 (5), pp.293 - 296. 〈10.1038/NPHOTON.2017.46〉
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https://hal-ensta.archives-ouvertes.fr/hal-01533204
Contributeur : Pierre Zaparucha <>
Soumis le : mardi 6 juin 2017 - 10:33:07
Dernière modification le : jeudi 10 mai 2018 - 02:00:44

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D. Guénot, D. Gustas, A. Vernier, B. Beaurepaire, F. Böhle, et al.. Relativistic electron beams driven by kHz single-cycle light pulses. Nature Photonics, Nature Publishing Group, 2017, 11 (5), pp.293 - 296. 〈10.1038/NPHOTON.2017.46〉. 〈hal-01533204〉

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