# The new model method of the electrostatic screening describing: three-component system of the 'closed' type

## TL;DR

This paper introduces a new self-consistent model for electrostatic screening in fully ionized electron-ion plasmas of the 'closed' type, accounting for correlations and higher non-ideality effects, with broad parameter analysis.

## Contribution

It develops the first comprehensive model for 'closed' type plasmas that includes electron-ion and ion-ion correlations, extending previous work on simpler systems.

## Key findings

- Characteristics of plasmas across various densities and temperatures are calculated.
- The model's results are compared with 'open' type systems.
- Correlations significantly influence electrostatic screening in non-ideal plasmas.

## Abstract

Within the problem of the finding of the mean potential energy of the charged particle in the plasma in this work a classification of physical systems (electrolytes, dusty plasmas, plasmas) is made based on consideration, or lack thereof, of a few special additional conditions. The system considered here, as well as other systems which are described with those additional conditions imposed are treated as the systems of the "closed" type, while the systems where those conditions are fully neglected - as being of the "open" type. In the our previous investigation one- and two component systems were examined. Here, as the object of investigation fully ionized electron-ion plasma with positive charged ions of two different kinds, including the plasmas of higher non-ideality, is chosen for the first time. For such plasma a new self-consistent model method of describing electrostatic screening is developed which includes all the necessary additional conditions. By this method such extremely significant phenomena as electron-ion and ion-ion correlations are included in the used model. The characteristics of the considered plasmas in a wide region of electron densities and temperatures are calculated. All the obtained results, including a comparison with systems of the "open" type are specifically discussed.