Effect of the nonuniformities of a diagnostic laser beam on the interpretation of experiments on turbulent mixing

The results of experiments on the turbulent mixing in the acceleration of Si/Al/Au and Si/Al/Mg three-layer targets on the ISKRA-4 high-power laser facility were analysed on the basis of calculations. It was shown that the onset of the line emission of helium-like aluminium upon irradiation of the rear side (Au or Mg) of the target with a diagnostic laser beam can be determined not only by the degree of turbulent mixing of Al and Au (Mg), but also by the ‘hot spots’ in the lateral structure of the diagnostic beam.