The dynamics of dust particles during the laser-induced plasma process: Self-similar expansion in a liquid

TL;DR

This study investigates how liquid ions influence the expansion of dusty plasma produced by laser ablation in liquids, highlighting the effects of electron superthermality and ion mass on plasma dynamics.

Contribution

It introduces a self-similar model to analyze the impact of liquid ions on plasma expansion, considering various initial conditions and ion compositions.

Findings

Superthermality significantly affects dust ion expansion in single ion cases.

Liquid ion mass greatly influences dust ion dynamics in double ion scenarios.

Expansion behavior depends on initial density ratios and temperature ratios.

Abstract

The role of liquid ions in the dusty plasma produced by laser ablation in a liquid environment is still unclear. For that purpose, we utilized the self-similar approach to investigate the effect of liquid ions on plasma expansion front. The fluid equations have been used for dust particles and ion species in addition to superthermal electron distribution. We treat the expansion process in the absence and existence of liquid ions. The impact of the dust-to-ion initial number density ratio, superthermality factor kappa, dust-to-electrons initial temperature ratio, and dust-ions atomic number on the expansion front has been addressed. Our findings show that in the single ion case, changing the superthermality of energetic electrons has the most significant influence on the dust ion expansion. Moreover, we observed that the mass of the liquid ions has the greatest effect on the dynamics of the dust ions in the double ion case.