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

C. Mossé (1) , Paul Genesio (1) , Nelly Bonifaci (2) , Annette Calisti (1)

1 PIIM - Physique des interactions ioniques et moléculaires
2 G2ELab - Laboratoire de Génie Electrique de Grenoble

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.

Mots clés: spectral line shapes; Stark effect; van der Waals broadening; genetic algorithm

Domaines: Energie électrique

C. Mossé, Paul Genesio, Nelly Bonifaci, Annette Calisti. A New Procedure to Determine the Plasma Parameters from a Genetic Algorithm Coupled with the Spectral Line-Shape Code PPP. Atoms, 2018, 6 (4), pp.55. ⟨10.3390/atoms6040055⟩. ⟨hal-01913141⟩