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Atoms 2014, 2(3), 334-356; doi:10.3390/atoms2030334

Spectral-Kinetic Coupling and Effect of Microfield Rotation on Stark Broadening in Plasmas

1
National Research Centre "Kurchatov institute", Kurchatov Square 1, Moscow 123182, Russia
2
Faculty of Physics, Weizmann Institute of Science, Rehovot 7610001, Israel
*
Author to whom correspondence should be addressed.
Received: 13 May 2014 / Revised: 17 June 2014 / Accepted: 2 July 2014 / Published: 30 July 2014
(This article belongs to the Special Issue Spectral Line Shapes in Plasmas)
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Abstract

The study deals with two conceptual problems in the theory of Stark broadening by plasmas. One problem is the assumption of the density matrix diagonality in the calculation of spectral line profiles. This assumption is closely related to the definition of zero wave functions basis within which the density matrix is assumed to be diagonal, and obviously violated under the basis change. A consistent use of density matrix in the theoretical scheme inevitably leads to interdependence of atomic kinetics, describing the population of atomic states with the Stark profiles of spectral lines, i.e., to spectral-kinetic coupling. The other problem is connected with the study of the influence of microfield fluctuations on Stark profiles. Here the main results of the perturbative approach to ion dynamics, called the theory of thermal corrections (TTC), are presented, within which the main contribution to effects of ion dynamics is due to microfield fluctuations caused by rotations. In the present study the qualitative behavior of the Stark profiles in the line center within predictions of TTC is confirmed, using non-perturbative computer simulations. View Full-Text
Keywords: foundations of Stark broadening theory; density matrix; coupling between population and spectral distribution; microfield fluctuations caused by its rotations; MD simulations foundations of Stark broadening theory; density matrix; coupling between population and spectral distribution; microfield fluctuations caused by its rotations; MD simulations
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Demura, A.V.; Stambulchik, E. Spectral-Kinetic Coupling and Effect of Microfield Rotation on Stark Broadening in Plasmas. Atoms 2014, 2, 334-356.

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