Molecular dynamics simulation for modeling plasma spectroscopy.

Bernard Talin (1) , Emmanuelle Dufour (1) , Annette Calisti (1) , Marco A. Gigosos (2) , Manuel A. Gonzalez (2) , Teresa del Rio Gaztelurrutia (3) , James W. Dufty (4)

1 PIIM - Physique des interactions ioniques et moléculaires
2 Departamento de Optica y Fisica Aplicada
3 Escuela Superior de Ingenieros
4 Department of Physics

The ion-electron coupling properties for an ion impurity in an electron gas and for a two-component plasma are carried out on the basis of a regularized electron-ion potential removing the short-range Coulomb divergence. This work is largely motivated by the study of radiator dipole relaxation in plasmas which makes a real link between models and experiments. Current radiative property models for plasmas include single electron collisions neglecting charge-charge correlations within the classical quasi-particle approach commonly used in this field. The dipole relaxation simulation based on electron-ion molecular dynamics proposed here will provide a means to benchmark and improve model developments. Benefiting from a detailed study of a single ion embedded in an electron plasma, the challenging two-component ion-electron molecular dynamics simulations are proved accurate. They open new possibilities of obtaining reference lineshape data.

Domaines: Physique des plasmas [physics.plasm-ph]

Bernard Talin, Emmanuelle Dufour, Annette Calisti, Marco A. Gigosos, Manuel A. Gonzalez, et al.. Molecular dynamics simulation for modeling plasma spectroscopy.. Journal of Physics A: Mathematical and General (1975 - 2006), 2003, 36 (22), pp.6049. ⟨hal-00142113⟩