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Atoms 2018, 6(1), 11; https://doi.org/10.3390/atoms6010011

ZEST: A Fast Code for Simulating Zeeman-Stark Line-Shape Functions

Commissariat à l’énergie atomique (CEA), DAM, DIF, F-91297 Arpajon, France
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Received: 31 January 2018 / Revised: 4 March 2018 / Accepted: 7 March 2018 / Published: 12 March 2018
(This article belongs to the Special Issue Spectral Line Shapes in Plasmas II)
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Abstract

We present the ZEST code, dedicated to the calculation of line shapes broadened by Zeeman and Stark effects. As concerns the Stark effect, the model is based on the Standard Lineshape Theory in which ions are treated in the quasi-static approximation, whereas the effects of electrons are represented by weak collisions in the framework of a binary collision relaxation theory. A static magnetic field may be taken into account in the radiator Hamiltonian in the dipole approximation, which leads to additional Zeeman splitting patterns. Ion dynamics effects are implemented using the fast Frequency-Fluctuation Model. For fast calculations, the static ion microfield distribution in the plasma is evaluated using analytic fits of Monte-Carlo simulations, which depend only on the ion-ion coupling parameter and the electron-ion screening factor. View Full-Text
Keywords: line shapes; Stark broadening; Zeeman pattern; quasi-static approximation; impact approximation; binary collision relaxation theory; microfield distribution; ion dynamics effects line shapes; Stark broadening; Zeeman pattern; quasi-static approximation; impact approximation; binary collision relaxation theory; microfield distribution; ion dynamics effects
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Gilleron, F.; Pain, J.-C. ZEST: A Fast Code for Simulating Zeeman-Stark Line-Shape Functions. Atoms 2018, 6, 11.

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