Abstract

The generation and their velocity distribution of free electrons generated in field ionization process is presented by using the single electron tracking method in the interaction of an intense laser pulse with noble atoms. Based on the quasi-static field approximation, the density of field-ionized free electrons in the pulse envelope is obtained by solving the Ammosov–Delone–Krainov ionization rate equation. The simulation result shows that the laser-generated plasma can rapidly consume the laser energy at falling edge of pulse and change the pulse shape in the laser-atom interaction.

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