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Atoms 2017, 5(4), 35;

Line Shape Modeling for the Diagnostic of the Electron Density in a Corona Discharge

Laboratoire PIIM, Aix-Marseille Université and CNRS, 13397 Marseille CEDEX 20, France
Laboratoire G2Elab, CNRS and Grenoble University, 25 rue des Martyrs, 38042 Grenoble, France
Guizhou Institute of Technology, Caiguan Road 1, Guiyang 550003, China
Author to whom correspondence should be addressed.
Academic Editor: Luka Č. Popović
Received: 31 August 2017 / Revised: 23 September 2017 / Accepted: 24 September 2017 / Published: 28 September 2017
(This article belongs to the Special Issue Spectral Line Shapes in Astrophysics and Related Topics)
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We present an analysis of spectra observed in a corona discharge designed for the study of dielectrics in electrical engineering. The medium is a gas of helium and the discharge was performed at the vicinity of a tip electrode under high voltage. The shape of helium lines is dominated by the Stark broadening due to the plasma microfield. Using a computer simulation method, we examine the sensitivity of the He 492 nm line shape to the electron density. Our results indicate the possibility of a density diagnostic based on passive spectroscopy. The influence of collisional broadening due to interactions between the emitters and neutrals is discussed. View Full-Text
Keywords: line shapes; stark broadening; neutral broadening; corona discharge line shapes; stark broadening; neutral broadening; corona discharge

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Rosato, J.; Bonifaci, N.; Li, Z.; Stamm, R. Line Shape Modeling for the Diagnostic of the Electron Density in a Corona Discharge. Atoms 2017, 5, 35.

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