Dependence of the charge composition of ions in laser plasma on the radiation focusing diameter in the mass-spectrometric analysis of solids

Full text : The processes occuring in the plasma bunch in laser mass spectrometry, used a kinetic approach, which allowed to detrmine the conditions of laser irradiation on a solid target. In particular, it was shown that the initial size of the plasmoid is an important condition for a given charge of the impurity ions. It was found that depending on experimental conditons the predominant role in the formation of the ion beam composition played by the processes of recombination and the acceleration of ions in the plasma