INVESTIGATION OF COULOMB LOGARITHM ON THE BASIS OF THE EFFECTIVE POTENTIALS IN DENSE PLASMA

Abstract

In this work, the Coulomb logarithm of inertial confinement fusion dense plasmas were studied. Based on the effective interaction potentials between particles, the Coulomb logarithm for a two-temperature nonisothermal dense plasma was obtained. These potentials take into consideration long-range multi-particle screening effects and short-range quantum-mechanical effects in two-temperature plasmas. Different methods for calculating the Coulomb logarithm in the kinetic transport theory and various choices of the constant plasma screening with or without the influence of ions contribution and the wave vector of electrons are considered. It was revealed that in non-degenerate plasma, taking into account the contributions of the ionic component is small, and in a degenerate plasma, taking into account the contribution of ions is necessary if the screening is determined by the electronic component. Knowledge of the Coulomb logarithm of a dense plasma is necessary to describe many processes, such as diffusion, thermal conductivity, electrical conductivity, stopping power, temperature relaxation, etc. Also, correct knowledge of the Coulomb logarithm is very important because it is used in various applications, including numerical methods, such as Monte Carlo simulation, particle in a cell method, also physical systems, including dusty plasma, ultracold plasma, laser ablation, IСF and other systems.

Keywords:Dense plasma, inertial confinement fusion, Coulomb logarithm, effective potential.