Abstract
The electron acceleration mechanism associated with the generation of a plasma wave due to self-modulation instability of laser radiation in a subcritical plasma produced by a laser prepulse coming 10 ns before the arrival of the main intense femtosecond pulse is considered. Three-dimensional particle-in-cell simulations of the interaction of laser radiation with two-dimensionally inhomogeneous subcritical plasma have shown that, for a sufficiently strong plasma inhomogeneity and a sharp front of the laser pulse, efficient plasma wave excitation, electron trapping, and generation of collimated electron beams with energies on the order of 0.2–0.5 MeV can occur. The simulation results agree with experiments on the generation of collimated beams of accelerated electrons from metal targets irradiated by intense femtosecond laser pulses.
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Original Russian Text © L.P. Pugachev, N.E. Andreev, P.R. Levashov, Yu.A. Malkov, A.N. Stepanov, D.A. Yashunin, 2015, published in Fizika Plazmy, 2015, Vol. 41, No. 7, pp. 588–599.
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Pugachev, L.P., Andreev, N.E., Levashov, P.R. et al. Laser acceleration of electrons in two-dimensionally inhomogeneous plasma at the boundary of a metal foil. Plasma Phys. Rep. 41, 542–552 (2015). https://doi.org/10.1134/S1063780X15070053
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DOI: https://doi.org/10.1134/S1063780X15070053