Investigation of ionic composition during expansion of laser-produced plasma by means of x-ray emissive spectroscopy and mass-spectroscopy methods

X-ray spectroscopy methods are used to study the evolution of the ion abundancies in a laser-produced aluminium plasma during its expansion. Plasma parameters are defined with the help of intensities and lineshapes of 3 p → 1 s and 1 snp → 1 s 2 ( n = 6-10) spectral lines of H-like and He-like A1 XIII, XII ions. It is shown that the most strong variation of ion abundances occurs in the plasma regions close enough to the target surface. Mass-spectrometry methods are applied to investigate the amount of ions with different charges at large (⩾3000mm) distances from the target.