Comparison of simulated X-ray conversion efficiency of laser produced iron plasma with experimental results

Demir A., KENAR LIM N. , Tallents G.

APPLIED PHYSICS B-LASERS AND OPTICS, vol.78, pp.945-948, 2004 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 78
  • Publication Date: 2004
  • Doi Number: 10.1007/s00340-004-1443-4
  • Page Numbers: pp.945-948


X-ray resonance lines between 11 Angstrom and 17 Angstrom emitted from iron plasmas created by a modest KrF laser have been simulated by modifying the atomic and hydrodynamic code EHYBRID. Free-free and free-bound emission from the Si-, Al-, Mg-, Na-, Ne- and F-like ions is calculated in the simulation. In the original experiments, a KrF laser (249 nm wavelength) with focused irradiances between 1x10(12) W/cm(2) and 1x10(15) W/cm(2) was focused on iron targets. The laser pulse duration was varied between 10 ps and 20 ns. We have calculated X-ray conversion efficiencies to be, for example, 0.5% over 2pi sr for 2x10(13) W/cm(2) and 20 ns pulse duration, in good agreement with experimental measurements. The simulation of X-ray emission is also presented for an experiment where a train of eight 7 ps KrF laser pulses is incident onto an iron target.