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Investigations of pressure nonuniformity in laser-irradiated targets using incoherent optical smoothing

1991; Cambridge University Press; Volume: 9; Issue: 2 Linguagem: Inglês

10.1017/s0263034600003311

1469-803X

Ivor Williams, G. J. Rickard, A. R. Bell,

Laser-Matter Interactions and Applications

From analytic models of the ablation process in laser-plasma experiments, as well as simulations with Fokker–Planck and Spitzer codes, we have identified a new effect, thermal inertia smoothing. This effect results in a smoother Fokker–Planck temporal and spatial variation of the ablation pressure than that for Spitzer, for the same applied timevarying laser intensity. It is therefore advantageous for incoherent optical smoothing schemes. This is especially true at early times in the laser pulse (≤100 ps).