Measurement of the time-resolved x-ray emission of different elements irradiated with a subpicosecond high-power laser

Claude Chenais-Popovics; Patrick Audebert; Virginie Nagels; Jean-Paul J. Geindre; Jean-Claude J. Gauthier; Sylvie Gary; Frederic Girard; Fabien Dorchies; Ronnie Shepherd; Olivier Peyrusse

doi:10.1117/12.507071

7 January 2004 Measurement of the time-resolved x-ray emission of different elements irradiated with a subpicosecond high-power laser

Claude Chenais-Popovics, Patrick Audebert, Virginie Nagels, Jean-Paul J. Geindre, Jean-Claude J. Gauthier, Sylvie Gary, Frederic Girard, Fabien Dorchies, Ronnie Shepherd, Olivier Peyrusse

Author Affiliations +

Proceedings Volume 5196, Laser-Generated and Other Laboratory X-Ray and EUV Sources, Optics, and Applications; (2004) https://doi.org/10.1117/12.507071
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

X-ray spectra of a few picosecond duration were emitted by aluminum, selenium and samarium thin foils irradiated with a 100 TW, 300 fs laser at 0.53 μm wavelength. They were measured in the 1600 eV range with high temporal and spectral resolution, using a high-speed streak camera coupled to a conical Bragg crystal. Gradients were limited by using thin foils (300 to 800 Å) deposited on a 50 μm gold pinhole. Frequency Domain Interferometry was set to measure the velocity of the critical density at the rear of the target and deduce the electron temperature. A few picosecond duration X-ray spectra have been measured. Sm spectra showed no spectral features in the measured wavelength range, providing a spectrally homogeneous backlighter for absorption spectroscopy. The duration of the emission was shorter when observed through a pinhole. 1-D hydrodynamic simulations coupled to an atomic collisional-radiative code have been used to simulate the X-ray emission of aluminum. The main features of the experimental time resolved spectra, obtained for the pinhole target have been well reproduced, for an initial temperature of 700 ± 100 eV.

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Claude Chenais-Popovics, Patrick Audebert, Virginie Nagels, Jean-Paul J. Geindre, Jean-Claude J. Gauthier, Sylvie Gary, Frederic Girard, Fabien Dorchies, Ronnie Shepherd, and Olivier Peyrusse "Measurement of the time-resolved x-ray emission of different elements irradiated with a subpicosecond high-power laser", Proc. SPIE 5196, Laser-Generated and Other Laboratory X-Ray and EUV Sources, Optics, and Applications, (7 January 2004); https://doi.org/10.1117/12.507071

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