Journal ArticleDOI
Electron Density and Gas Temperature from Line Broadening in an Argon Surface-Wave-Sustained Discharge at Atmospheric Pressure
M. D. Christova,Eduardo Castaños-Martínez,María Dolores Calzada,Y. Kabouzi,J. M. Luque,Michel Moisan +5 more
TLDR
The collisional broadening of neutral argon lines is used to determine the electron density and gas temperature of a microwave discharge at atmospheric pressure and the values obtained are in reasonable agreement with those derived from the linear Starkbroadening of the Hβ line.Abstract:
We have used the collisional broadening of neutral argon lines to determine the electron density and gas temperature of a microwave discharge at atmospheric pressure. The gas temperature can be obtained from the Van der Waals broadening, provided that the Stark broadening is negligible. This can be achieved by using lines from low-lying levels (close to the ground state). On the other hand, lines corresponding to transitions from high-lying levels, which are more sensitive to Stark (quadratic) broadening, can be utilized to determine electron density. The electron density values obtained from the quadratic Stark broadening of argon atoms are in reasonable agreement with those derived from the linear Stark broadening of the Hβ line. The proposed method ensures perturbation-free access to plasma parameters, which is not the case when adding hydrogen to the discharge, even in a small amount, to observe the Balmer series lines.read more
Citations
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Journal ArticleDOI
Contribution of surface-wave (SW) sustained plasma columns to the modeling of RF and microwave discharges with new insight into some of their features. A survey of other types of SW discharges
Michel Moisan,H. Nowakowska +1 more
Journal ArticleDOI
Using the van der Waals broadening of the spectral atomic lines to measure the gas temperature of an argon microwave plasma at atmospheric pressure
TL;DR: In this article, the authors proposed a method based on the relation between the gas temperature and the van der Waals broadening of argon atomic spectral lines with a Stark contribution negligible.
Journal ArticleDOI
Hydrogen production from ethanol decomposition by a microwave plasma: Influence of the plasma gas flow
TL;DR: In this paper, a study of molecular hydrogen production from ethanol decomposition by argon microwave discharge at atmospheric pressure is described, where different Ar flows (in the 0.50-1.5-L/min range) were tested while ethanol was constantly supplied at 0.22-g/h.
Journal ArticleDOI
Theoretical background of optical emission spectroscopy for analysis of atmospheric pressure plasmas
Thierry Belmonte,Thierry Belmonte,Cédric Noël,Cédric Noël,T. Gries,T. Gries,Julien Martin,Julien Martin,Gérard Henrion,Gérard Henrion +9 more
TL;DR: In this article, a theoretical background of optical emission spectroscopy and some selected examples of issues in the field of atmospheric plasmas are presented, including line broadening, emission of continua and molecules, radiation models, etc. Easy-to-use formulas are provided to give access to essential plasma parameters.
Journal ArticleDOI
Experimental research on ethanol-chemistry decomposition routes in a microwave plasma torch for hydrogen production
TL;DR: In this article, a study of ethanol decomposition process to produce hydrogen using an argon microwave plasma sustained by a Torche a Injection Axiale sur Guide d'Ondes opened to the atmosphere is presented.
References
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Book
Spectral Line Broadening by Plasmas
Hans R. Griem,W. L. Barr +1 more
TL;DR: SpectSpectral Line Broadening by Plasmas as discussed by the authors provides a theoretical overview of the spectral line broadening mechanism and its application in the field of plasma spectroscopy, with a focus on spectral lines.
Journal ArticleDOI
The ultraviolet bands of OH Fundamental data
G.H. Dieke,H.M. Crosswhite +1 more
TL;DR: In this paper, a new survey of the infrared and visible-light bands of the Earth's ozone (OH) is presented, which is used for temperature measurements in flames and other combustion processes.
Book
Thermal Plasmas: Fundamentals and Applications
TL;DR: In this paper, the authors introduce the concept of the plasma state and derive the fundamental concepts in Gaseous Electronics, including the basic atomic and molecular theory, and the physics of the plasmas.
Journal ArticleDOI
New plasma diagnosis tables of hydrogen Stark broadening including ion dynamics
TL;DR: In this paper, a set of tables of the Stark width of the first three lines of Lyman and Balmer series of hydrogen, useful for plasma diagnosis purposes, is presented by means of a fully recognized computer simulation technique.
Journal ArticleDOI
Plasma broadening and shifting of non-hydrogenic spectral lines: present status and applications
TL;DR: A short overview of the available theoretical results is followed by the description of experimental techniques for the line shape and shift measurements as discussed by the authors, and a typical experimental procedure is described to select higher accuracy experimental data for plasma diagnostic purposes.