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All-Optical Steering of Laser-Wakefield-Accelerated Electron Beams

2010; American Physical Society; Volume: 105; Issue: 21 Linguagem: Inglês

10.1103/physrevlett.105.215001

1092-0145

A. Popp, J. Vieira, Jens Osterhoff, Zs. Major, R. Hörlein, M. Fuchs, R. Weingartner, T. P. Rowlands-Rees, M. Martí, Ricardo Fonseca, S. F. Martins, L. O. Silva, S. M. Hooker, F. Krausz, F. Grüner, S. Karsch,

Laser-induced spectroscopy and plasma

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.