Investigation of the influence of single particle oscillations on the transport properties of dense plasma

TL;DR

This study examines how single particle oscillations induced by an external laser field affect the transport properties of dense plasmas, revealing non-monotonic behavior and reductions in diffusion and viscosity coefficients.

Contribution

It introduces a model incorporating external oscillating fields into plasma transport calculations, highlighting the impact of electron oscillations on screening and transport coefficients.

Findings

Electron oscillations significantly reduce ionic diffusion and viscosity.

Transport coefficients exhibit non-monotonic dependence on oscillation frequency.

External fields increase ionic transport coefficients compared to no-field conditions.

Abstract

Transport properties of the ionic component of dense plasmas are investigated on the basis of effective potentials taking into account the presence of an external alternating electrical (laser) field. The latter generates single particle oscillations of electrons and significantly changes the screening of the test charge in plasma. Therefore, transport coefficients become non-monotonic function of the oscillation frequency. The results for the diffusion and viscosity coefficients are presented. These transport coefficients are computed using the generalized Coulomb logarithm within the Chapman-Enskog model for the fluid description. It was revealed that the oscillation of the electrons in the alternating external field in the significant reduction of the ionic diffusion and viscosity coefficients. The ionic diffusion and viscosity coefficients are larger compared to the case without the external field impact.