Generation of stable, low-divergence electron beams by laser-wakefield acceleration in a steady-state-flow gas cell

Osterhoff, J. and Popp, A. and Major, Zs. and Marx, B. and Rowlands-Rees, T. P. and Fuchs, M. and Geissler, M. and Hoerlein, R. and Hidding, B. and Becker, S. and Peralta, E. A. and Schramm, U. and Gruener, F. and Habs, D. and Krausz, F. and Hooker, S. M. and Karsch, S. (2008) Generation of stable, low-divergence electron beams by laser-wakefield acceleration in a steady-state-flow gas cell. Physical Review Letters, 101 (8). 085002. ISSN 0031-9007

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Abstract

Laser-driven, quasimonoenergetic electron beams of up to similar to 200 MeV in energy have been observed from steady-state-flow gas cells. These beams emitted within a low-divergence cone of 2.1 +/- 0.5 mrad FWHM display unprecedented shot-to-shot stability in energy (2.5% rms), pointing (1.4 mrad rms), and charge (16% rms) owing to a highly reproducible gas-density profile within the interaction volume. Laser-wakefield acceleration in gas cells of this type provides a simple and reliable source of relativistic electrons suitable for applications such as the production of extreme-ultraviolet undulator radiation.