Postionisation of a spatially nonuniform plasma plume under high-intensity femtosecond laser irradiationстатья
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Аннотация:The plasma plume formed by a high-power nanosecondlaser pulse on the surface of solid targets as well as the plumeparameters after its irradiation by a high-intensity femtosecondlaser pulse are investigated by optical diagnostic techniques. Twodimensionalpatterns of the electron plasma density are reconstructedfrom experimentally recorded interferograms at differentstages of plasma evolution. It is shown that the interaction of thehigh-intensity femtosecond radiation with the plasma cloud isaccompanied by the field ionisation of atoms and ions as well as bya significant increase in the electron density throughout the interactionvolume.