Abstract: The ionization dynamics of plasma, created on the surface of solid-state target irradiated by high power sub-picosecond laser pulses, is studied. the laser energy absorption, heating, expansion and ionization of the target matter are taken into account self-consistently. We have employed and compared two different models of ionization: quasistationary model and non-stationary model of average ion. Next, we have demonstrated the influence of ionization processes on plasma dynamics. !5
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