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Proceedings Paper

Measurement of the time-resolved x-ray emission of different elements irradiated with a subpicosecond high-power laser
Author(s): 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
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Paper 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.

Paper Details

Date Published: 7 January 2004
PDF: 8 pages
Proc. SPIE 5196, Laser-Generated and Other Laboratory X-Ray and EUV Sources, Optics, and Applications, (7 January 2004); doi: 10.1117/12.507071
Show Author Affiliations
Claude Chenais-Popovics, Ecole Polytechnique (France)
Patrick Audebert, Ecole Polytechnique (France)
Virginie Nagels, Ecole Polytechnique (France)
Jean-Paul J. Geindre, Ecole Polytechnique (France)
Jean-Claude J. Gauthier, CNRS-CELIA/Univ. Bordeaux I (France)
Ecole Polytechnique (France)
Sylvie Gary, CEA-DIF (France)
Frederic Girard, CEA-DIF (France)
Fabien Dorchies, CNRS-CELIA/Univ. Bordeaux I (France)
Ronnie Shepherd, Lawrence Livermore National Lab. (United States)
Olivier Peyrusse, CNRS-CELIA/Univ. Bordeaux I (France)
CEA-DIF (France)


Published in SPIE Proceedings Vol. 5196:
Laser-Generated and Other Laboratory X-Ray and EUV Sources, Optics, and Applications
George A. Kyrala; Jean-Claude J. Gauthier; Carolyn A. MacDonald; Ali M. Khounsary, Editor(s)

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