Volume 66, Number 4, May 2004
|Page(s)||492 - 498|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||01 May 2004|
Enhancement of high-energy electron generation through suppression of Raman backscattering
Eindhoven University of Technology - P.O. Box 513 5600 MB Eindhoven, The Netherlands
2 Lawrence Berkeley National Laboratory - Berkeley, CA 94720, USA
Corresponding author: L.P.J.Kamp@tue.nl
Accepted: 23 March 2004
The effect of Raman backscattering (RBS) on high-energy electron generation in laser-plasma interaction has been investigated for laser intensities well above the wave breaking and electron trapping threshold. One-dimensional particle-in-cell simulations show that suppression of RBS increases the high-energy electron yield in this regime. RBS-induced heating causes heavy beam loading and damping of the laser wake. Its suppression leads to higher wake amplitudes and higher particle energies. RBS suppression through direct stimulation of Raman forward scatter is demonstrated. The implications for high-energy electron production through laser-plasma interaction are discussed.
PACS: 41.75.Jv – Laser-driven acceleration / 52.38.Kd – Laser-plasma acceleration of electrons and ions / 52.38.Bv – Rayleigh scattering; stimulated Brillouin and Raman scattering
© EDP Sciences, 2004
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