Laser creation of aluminium plasma from a solid target: A model

摘要

Several phenomena are evolving at the same time in laser-induced plasmas. Modelling the creation phase of this kind of plasma implies to understand these phenomena and their interactions. A 1D model was elaborated with the purpose of providing a complete description of the ablation of an aluminium alloy target. Phenomena as solid heating, vaporisation step vapour excitation and ionisation processes, among others, were taken into account. The plasma was assumed to have stored energy in more than one hundred level of Al, Al~+, Al~(++), Al~(+++) and free electrons interacting through five processes. In this paper we propose to describe influences of the multiphoton ionisation and target surface temperature from ambient to critical temperature.