Abstract
In this paper, we investigate the transient velocity distribution of laser-produced plasma (LPP) in gaseous media in the field-ionization regime. We derive the velocity distribution by matching the time-varying velocities of LPP with the reference velocity. In order to smooth the distribution functions, we propose a partition scheme to calculate the velocity, in which the time-varying velocity is contributed by two adjacent grids with different weighting factors. The mean kinetic energy is calculated based on the velocity distribution, which holds promise to determine the dynamics of LPP as initial conditions in further studies, for instance, of the evolution of LPP channel.
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