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Line X-ray emission from Al targets irradiated by high-intensity, variable-length laser pulses

  • J. LIMPOUCH (a1), O. RENNER (a2), E. KROUSKÝ (a2), I. USCHMANN (a3), E. FÖRSTER (a3), M.P. KALASHNIKOV (a4) and P.V. NICKLES (a4)...

Abstract

The absolutely calibrated K-shell spectra emitted from short-living aluminum plasmas at laser intensities of 5 × 1015–4 × 1018 W/cm2 are reported. The experiments performed with the constant energy, variable-length laser pulses (1.5 ps–1 ns) are modeled by the one-dimensional (1D) hydrodynamics code, including nonlinear resonance absorption of the laser radiation, fast electron acceleration, and energy transfer into the target. The characteristic features of the measured and the postprocessed spectra are outlined. The spatial and temporal profiles of the emitted spectra are presented; the scaling rules for the conversion efficiency of the laser radiation into the line X-ray emission are discussed.

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Corresponding author

Address correspondence and reprint requests to: J. Limpouch, Faculty of Nuclear Sciences and Physical Engineering CTU, Brehová 7, 115 19 Prague, Czech Republic. E-mail: limpouch@siduri.fjfi.cvut.cz

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