Broadening of the Neutral Helium 492 nm Line in a Corona Discharge: Code Comparisons and Data Fitting
Passive plasma spectroscopy is a well-established non-intrusive diagnostic technique. Depending on the emitter and its environment which determine the dominant interactions and effects governing emission line shapes, passive spectroscopy allows the determination of electron densities, emitter and pe...
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MDPI AG
2018-04-01
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| Online Access: | http://www.mdpi.com/2218-2004/6/2/19 |
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| author | Roshin Raj Sheeba Mohammed Koubiti Nelly Bonifaci Franck Gilleron Jean-Christophe Pain Evgeny Stambulchik |
| author_facet | Roshin Raj Sheeba Mohammed Koubiti Nelly Bonifaci Franck Gilleron Jean-Christophe Pain Evgeny Stambulchik |
| author_sort | Roshin Raj Sheeba |
| collection | DOAJ |
| description | Passive plasma spectroscopy is a well-established non-intrusive diagnostic technique. Depending on the emitter and its environment which determine the dominant interactions and effects governing emission line shapes, passive spectroscopy allows the determination of electron densities, emitter and perturber temperatures, as well as other quantities like relative abundances. However, using spectroscopy requires appropriate line shape codes retaining all the physical effects governing the emission line profiles. This is required for line shape code developers to continuously correct or improve them to increase their accuracy when applied for diagnostics. This is exactly the aim expected from code–code and code–data comparisons. In this context, the He i 492 nm line emitted in a helium corona discharge at room temperature represents an ideal case since its profile results from several broadening mechanisms: Stark, Doppler, resonance, and van der Waals. The importance of each broadening mechanism depends on the plasma parameters. Here the profiles of the He i 492 nm in a helium plasma computed by various codes are compared for a selected set of plasma parameters. In addition, preliminary results related to plasma parameter determination using an experimental spectrum from a helium corona discharge at atmospheric pressure, are presented. |
| first_indexed | 2024-12-11T18:59:00Z |
| format | Article |
| id | doaj.art-bdfe0925828e4d209bc04ee47dd2aa87 |
| institution | Directory Open Access Journal |
| issn | 2218-2004 |
| language | English |
| last_indexed | 2024-12-11T18:59:00Z |
| publishDate | 2018-04-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-bdfe0925828e4d209bc04ee47dd2aa872022-12-22T00:54:04ZengMDPI AGAtoms2218-20042018-04-01621910.3390/atoms6020019atoms6020019Broadening of the Neutral Helium 492 nm Line in a Corona Discharge: Code Comparisons and Data FittingRoshin Raj Sheeba0Mohammed Koubiti1Nelly Bonifaci2Franck Gilleron3Jean-Christophe Pain4Evgeny Stambulchik5Aix Marseille Univ, CNRS, PIIM, CEDEX 20, F13397 Marseille, FranceAix Marseille Univ, CNRS, PIIM, CEDEX 20, F13397 Marseille, FranceLaboratoire G2Elab, CNRS/Grenoble University, 25 rue des Martyrs, 38042 Grenoble, FranceCEA DAM, DIF, F-91297 Arpajon, FranceCEA DAM, DIF, F-91297 Arpajon, FranceFaculty of Physics, Weizmann Institute of Science, Rehovot 7610001, IsraelPassive plasma spectroscopy is a well-established non-intrusive diagnostic technique. Depending on the emitter and its environment which determine the dominant interactions and effects governing emission line shapes, passive spectroscopy allows the determination of electron densities, emitter and perturber temperatures, as well as other quantities like relative abundances. However, using spectroscopy requires appropriate line shape codes retaining all the physical effects governing the emission line profiles. This is required for line shape code developers to continuously correct or improve them to increase their accuracy when applied for diagnostics. This is exactly the aim expected from code–code and code–data comparisons. In this context, the He i 492 nm line emitted in a helium corona discharge at room temperature represents an ideal case since its profile results from several broadening mechanisms: Stark, Doppler, resonance, and van der Waals. The importance of each broadening mechanism depends on the plasma parameters. Here the profiles of the He i 492 nm in a helium plasma computed by various codes are compared for a selected set of plasma parameters. In addition, preliminary results related to plasma parameter determination using an experimental spectrum from a helium corona discharge at atmospheric pressure, are presented.http://www.mdpi.com/2218-2004/6/2/19stark broadeningvan der Waals broadeningline shapeshelium plasmacorona dischargeplasma diagnosticscode comparisonneutral broadeningpressure broadening |
| spellingShingle | Roshin Raj Sheeba Mohammed Koubiti Nelly Bonifaci Franck Gilleron Jean-Christophe Pain Evgeny Stambulchik Broadening of the Neutral Helium 492 nm Line in a Corona Discharge: Code Comparisons and Data Fitting Atoms stark broadening van der Waals broadening line shapes helium plasma corona discharge plasma diagnostics code comparison neutral broadening pressure broadening |
| title | Broadening of the Neutral Helium 492 nm Line in a Corona Discharge: Code Comparisons and Data Fitting |
| title_full | Broadening of the Neutral Helium 492 nm Line in a Corona Discharge: Code Comparisons and Data Fitting |
| title_fullStr | Broadening of the Neutral Helium 492 nm Line in a Corona Discharge: Code Comparisons and Data Fitting |
| title_full_unstemmed | Broadening of the Neutral Helium 492 nm Line in a Corona Discharge: Code Comparisons and Data Fitting |
| title_short | Broadening of the Neutral Helium 492 nm Line in a Corona Discharge: Code Comparisons and Data Fitting |
| title_sort | broadening of the neutral helium 492 nm line in a corona discharge code comparisons and data fitting |
| topic | stark broadening van der Waals broadening line shapes helium plasma corona discharge plasma diagnostics code comparison neutral broadening pressure broadening |
| url | http://www.mdpi.com/2218-2004/6/2/19 |
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