18 September 1995 Femtosecond laser-produced plasma x rays from periodically modulated surface targets
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Abstract
We have studied theoretically and experimentally the x-ray production above 1 keV from femtosecond laser plasmas generated on periodically modulated surface targets. Laser energy coupling to plasma surface waves has been modeled using a numerical differential method. Almost total absorption of incident laser radiation is predicted for optimized interaction conditions. Silicon gratings have been irradiated by a 120 fs Ti: sapphire laser at irradiances in excess of 1016W/cm2. X-ray intensities above 1.5 keV (K-shell lines) have been measured as a function of the incidence angle. Results show a distinct x-ray emission maximum for the first order diffraction angle and are in good qualitative agreement with our theoretical predictions.
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Jean-Claude J. Gauthier, Jean-Claude J. Gauthier, S. Bastiani, S. Bastiani, Patrick Audebert, Patrick Audebert, Jean-Paul Geindre, Jean-Paul Geindre, K. Neuman, K. Neuman, Tom D. Donnelly, Tom D. Donnelly, M. Hoffer, M. Hoffer, Roger W. Falcone, Roger W. Falcone, Ronnie L. Shepherd, Ronnie L. Shepherd, Dwight F. Price, Dwight F. Price, William E. White, William E. White, } "Femtosecond laser-produced plasma x rays from periodically modulated surface targets", Proc. SPIE 2523, Applications of Laser Plasma Radiation II, (18 September 1995); doi: 10.1117/12.220985; https://doi.org/10.1117/12.220985
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