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All-optical steering of laser-wakefield-accelerated electron beams.

Research paper by A A Popp, J J Vieira, J J Osterhoff, Zs Z Major, R R Hörlein, M M Fuchs, R R Weingartner, T P TP Rowlands-Rees, M M Marti, R A RA Fonseca, S F SF Martins, L O LO Silva, S M SM Hooker, F F Krausz, F F Grüner, et al.

Indexed on: 15 Jan '11Published on: 15 Jan '11Published in: Physical review letters



Abstract

We investigate the influence of a tilted laser-pulse-intensity front on laser-wakefield acceleration. Such asymmetric light pulses may be exploited to obtain control over the electron-bunch-pointing direction and in our case allowed for reproducible electron-beam steering in an all-optical way within an 8 mrad opening window with respect to the initial laser axis. We also discovered evidence of collective electron-betatron oscillations due to off-axis electron injection into the wakefield induced by a pulse-front tilt. These findings are supported by 3D particle-in-cell simulations.