Kinetic model for ion pressure perturbations in inhomogeneous laser-matter interactions

Abstract

A Boltzmann-Vlasov Fokker-Planck model is used to characterize the evolution of ion pressure perturbations from nonuniform laser deposition in a plasma slab. It is found that significant reduction and smoothing of ion pressure perturbations from nonuniform optically smoothed single beam laser deposition can be achieved on hydrodynamic time scales over a range of scale sizes. In addition, it is observed that the ion Fokker-Planck model predicts more smoothing of the ion pressure perturbations from the critical to ablation surface than the ion fluid model.