Femtosecond laser-produced plasma x rays from periodically modulated surface targets

Jean-Claude J. Gauthier; S. Bastiani; Patrick Audebert; Jean-Paul Geindre; K. Neuman; Tom D. Donnelly; M. Hoffer; Roger W. Falcone; Ronnie L. Shepherd; Dwight F. Price; William E. White

doi:10.1117/12.220985

18 September 1995 Femtosecond laser-produced plasma x rays from periodically modulated surface targets

Jean-Claude J. Gauthier, S. Bastiani, Patrick Audebert, Jean-Paul Geindre, K. Neuman, Tom D. Donnelly, M. Hoffer, Roger W. Falcone, Ronnie L. Shepherd, Dwight F. Price, William E. White

Author Affiliations +

Proceedings Volume 2523, Applications of Laser Plasma Radiation II; (1995) https://doi.org/10.1117/12.220985
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

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, S. Bastiani, Patrick Audebert, Jean-Paul Geindre, K. Neuman, Tom D. Donnelly, M. Hoffer, Roger W. Falcone, Ronnie L. Shepherd, Dwight F. Price, and 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); https://doi.org/10.1117/12.220985

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