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Atoms 2018, 6(4), 55; https://doi.org/10.3390/atoms6040055

A New Procedure to Determine the Plasma Parameters from a Genetic Algorithm Coupled with the Spectral Line-Shape Code PPP

1
Aix Marseille Université, CNRS, PIIM UMR 7345, 13397 Marseille, France
2
Laboratoire G2Elab, CNRS, Grenoble University, 21 rue des Martyrs, 38042 Grenoble, France
*
Author to whom correspondence should be addressed.
Received: 3 July 2018 / Revised: 3 September 2018 / Accepted: 20 September 2018 / Published: 26 September 2018
(This article belongs to the Special Issue Spectral Line Shapes in Plasmas II)
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Abstract

A method of analysis of experimental spectra for obtaining the plasma parameters is presented and discussed. Based on the coupling of the spectral line-shape code PPP with the genetic algorithm PIKAIA, the proposed method is inspired by natural selection mechanisms resulting in the development of basic genetic operators. The spectra analysis is performed by fitting experimental spectra with synthetic spectral line profiles obtained by using theoretical models and a set of plasma parameters, such as its temperature and electron density. In the present paper, the diagnostic procedure based on a genetic algorithm coupled with the PPP code has been used for the analysis of both hydrogen Balmer-β and He I 492.2 nm lines in the helium plasma created by corona discharge. The broadening of these spectral lines due to the Stark effect has been considered, together with the van der Waals and instrumental broadening. View Full-Text
Keywords: spectral line shapes; Stark effect; van der Waals broadening; genetic algorithm spectral line shapes; Stark effect; van der Waals broadening; genetic algorithm
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Mossé, C.; Génésio, P.; Bonifaci, N.; Calisti, A. A New Procedure to Determine the Plasma Parameters from a Genetic Algorithm Coupled with the Spectral Line-Shape Code PPP. Atoms 2018, 6, 55.

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