Real-time observation of laser-driven electron acceleration

Alexander Buck, Maria Nicolai, Karl Schmid, Chris M.S. Sears, Alexander Sävert, Julia M. Mikhailova, Ferenc Krausz, Malte C. Kaluza, Laszlo Veisz

Research output: Contribution to journalArticle

161 Scopus citations

Abstract

Electron acceleration by laser-driven plasma waves 1,2 is capableof producing ultra-relativistic, quasi-monoenergetic electron bunches 3-5 with orders of magnitude higher accelerating gradients and much shorter electron pulses than state-of-the-art radio-frequency accelerators. Recent developments have shown peak energies reaching into the GeV range 6 and improved stability and control over the energy spectrum and charge. Future applications, such as the development of laboratory X-ray sources with unprecedented peak brilliance or ultrafast time-resolved measurements critically rely on a temporal characterization of the acceleration process and the electron bunch. Here, we report the first real-time observation of the accelerated electron pulse and the accelerating plasma wave. Our time-resolved study allows a single-shot measurement of the 5.8 +1.9 -2.1 fs electron bunch full-width at half-maximum (2.5 +0.8 -0.9 fs root mean square) as well as the plasma wave with a density-dependent period of 12-22 fs and reveals the evolution of the bunch, its position in the surrounding plasma wave and the wake dynamics. The results afford promise for brilliant, sub-ångström-wavelength ultrafast electron and photon sources for diffraction imaging with atomic resolution in space and time.

Original languageEnglish (US)
Pages (from-to)543-548
Number of pages6
JournalNature Physics
Volume7
Issue number7
DOIs
StatePublished - Jul 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Buck, A., Nicolai, M., Schmid, K., Sears, C. M. S., Sävert, A., Mikhailova, J. M., Krausz, F., Kaluza, M. C., & Veisz, L. (2011). Real-time observation of laser-driven electron acceleration. Nature Physics, 7(7), 543-548. https://doi.org/10.1038/nphys1942