A model of pulsed target evaporation and ion generation in laser plasma

Processes in laser plasma generated under conditions of a real temporal variation in the laser radiation power density in the interval of average values within 2 $\times$ 10$^9$–2 $\times$ 10$^{10}$ W/cm$^2$ have been studied. A layer model of the pulsed evaporation of a target is employed with the corresponding step-by-step description of the process of ion generation. It is shown that plasma is formed in an expanding vapor. At the stage of optical breakdown, the electron temperature grows much faster than the ion temperature. During the entire period of irradiation of the target, the rate of ion generation is significantly greater than the rate of recombination. The kinetics of ion formation at the laser radiation pulse front is considered.