Microfield Fluctuations and Spectral Line Shapes in Strongly Coupled Two-Component Plasmas

TL;DR

This paper presents a numerical simulation approach to analyze spectral line shapes in strongly coupled two-component plasmas, accounting for microfield fluctuations and correlations, and validates results with experimental data.

Contribution

It introduces a novel method combining molecular dynamics and quantum simulations to include plasma correlations in spectral line shape calculations.

Findings

Good agreement with experimental Ly-alpha line shapes in laser plasmas.

Method effectively incorporates ion-electron correlations.

Accurate modeling of microfield fluctuations in strongly coupled plasmas.

Abstract

The spectral line shapes for hydrogen-like heavy ion emitters embedded in strongly correlated two-component electron-ion plasmas are investigated with numerical simulations. For that purpose the microfield fluctuations are calculated by molecular dynamics simulations where short range quantum effects are taken into account by using a regularized Coulomb potential for the electron-ion interaction. The microfield fluctuations are used as input in a numerical solution of the time-dependent Schroedinger equation for the radiating electron. In distinction to the standard impact and quasistatic approximations the method presented here allows to account for the correlations between plasma ions and electrons. The shapes of the Ly-alpha line in Al are investigated in the intermediate regime. The calculations are in good agreement with experiments on the Ly-alpha line in laser generated plasmas.