Low electron density diagnostics: development of optical emission spectroscopic techniques and some applications to microwave induced plasmas

Ivković, M.; Jovičević, S.; Konjević, N.

doi:10.1016/j.sab.2004.02.005

Cited by 88 publications

(75 citation statements)

References 62 publications

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“…15, which has been taken as a reference in many works in the bibliography (Calisti et al 1988;Schöning 1994;Ivković et al 2004): the comparison between the results of Richter & Piel (1985) and those obtained in our simulations. This figure shows the most relevant aspect of the Fig.…”

Section: Resultsmentioning

confidence: 92%

“…It is also used to measure the He abundances (Smart et al 1996;Moehler et al 2004;Huang & Gies 2006), temperatures and surface gravity (Moehler et al 2004), radial or rotational velocities (see, for example, (Levato et al 1996;Kohoutek et al 1999;Steele et al 1999)), to do spectral classifications (Jeffery et al 1997;Steele et al 1999;Martayan et al 2006;Bresolin et al 2006;Vennes et al 2007) or to measure the magnetic fields intensities (O'Toole et al 2005). The Tables 2-11 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/503/293 use of this line in laboratory plasmas is even more widespread (see the review Ivković et al 2004, and the references therein).…”

Section: Introductionmentioning

confidence: 99%

“…This situation also appears for other conditions (hydrogen-like lines with quasi-degenerate states) and in those configurations with satellite lines due to forbidden transitions. In particular, the 4921 Å and 4471 Å helium lines have been especially useful both as a test of theoretical models for laboratory plasmas and for their direct use in plasma diagnotics (Ivković et al 2004), because in both cases one can measure the intensity of the forbidden line that can be as intense as, or even more intense than, the main allowed component but that is kept separate enough of the main component to be recorded as an independent spectral line. This line appears as result of the breaking off of the selection rule that impedes the transition between states with the same parity because the mixing of states caused by the Stark effect.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stark broadening tables for the helium I 447.1 line

Ma¹,

González²

2009

A&A

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Context. Stark broadening of the 447.1 line of neutral helium in a weakly coupled plasma has been studied. This spectral line has a very close forbidden component. This means it is very sensitive to the plasma electron density, which is similar to hydrogen lines, for which the Stark effect is linear. Aims. The aim of this work is to supply information to be used in the spectroscopic diagnostics of plasmas. Methods. We used computer simulations in the frame of a physical model for a plasma with weak coupling between charges. The calculation includes the so-called "ion dynamics effects" in a natural way. The electron density, the ionic and electronic temperatures, and the perturber mass were the parameters in the calculations. Results. Simulation results relate the line width, shift, shape, and especially the ratio of intensities between the allowed and forbidden components, with the plasma parameters. These results are supplied as tables of line shapes.

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Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stark broadening tables for the helium I 447.1 line

Ma¹,

González²

2009

A&A

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“…[91,102] and whenever it is possible atomic lines with low absorption coefficients have to be used in electron density measurements. It is also interesting to note that for lines with forbidden components the distance between the allowed and forbidden component depends on the plasma electron density while it is not affected by self-absorption, hence plasma diagnostics can be done by measuring that distance without the problems derived of self-absorbed lines [92]. For example, for He I lines with forbidden components different works have performed plasma diagnostics by using approximate formulas [81,[103][104][105] or available tables of Stark broadened profiles [80,81].…”

Section: Self-absorptionmentioning

confidence: 99%

Electron density measurement in atmospheric pressure plasma jets: Stark broadening of hydrogenated and non-hydrogenated lines

Nikiforov

Leys

González

et al. 2015

Plasma Sources Sci. Technol.

205

179

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Electron density is one of the key parameters in the physics of a gas discharge. In this contribution the application of the Stark broadening method to determine the electron density in low temperature atmospheric pressure plasma jets is discussed. An overview of the available theoretical Stark broadening calculations of hydrogenated and non-hydrogenated atomic lines is presented. The difficulty in the evaluation of the fine structure splitting of lines, which is important at low electron density, is analysed and recommendations on the applicability of the method for low ionization degree plasmas are given. Different emission line broadening mechanisms under atmospheric pressure conditions are discussed and an experimental line profile fitting procedure for the determination of the Stark broadening contribution is suggested. Available experimental data is carefully analysed for the Stark broadening of lines in plasma jets excited over a wide range of frequencies from dc to MW and pulsed mode. Finally, recommendations are given concerning the application of the Stark broadening technique for the estimation of the electron density under typical conditions of plasma jets.

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“…14 For details of low N e plasma diagnostics from Balmer line shapes, see, e.g., Ref. 15 and references therein.…”

Section: Introductionmentioning

confidence: 99%

A contribution to spectroscopic diagnostics and cathode sheath modeling of micro-hollow gas discharge in argon

Cvejić

Spasojević

Šišović

et al. 2011

Journal of Applied Physics

Self Cite

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A global model of the self-pulsing regime of micro-hollow cathode dischargesIn this paper, the hydrogen Balmer beta line shape from a micro-hollow gas discharge (MHGD) in argon with traces of hydrogen is used for simultaneous diagnostics of plasma and cathode sheath (CS) parameters. For this purpose, a simple model of relevant processes responsible for the line broadening is introduced and applied to the Balmer beta profile recorded from a MHGD generated in the microhole (diameter 100 lm at narrow side and 130 lm at wider side) of a gold-alumina-gold sandwich in the pressure range (100-900 mbar). The electron number density N e in the range (0.4-4.5) Â 10 20 m -3 is determined from the width of the central part of the Balmer beta line profile, while, from the extended wings of the Balmer beta profile, induced by dc Stark effect, the next three parameters are determined: the average value E a of electric field strength in the CS in the range (16-95 kV/cm), the electric field strength E 0 at the cathode surface in the range (32-190 kV/cm), and the CS thickness z g in the range (18-70 lm). All four MHGD parameters, N e , E a , E 0 , and z g , compare reasonably well with results of the modeling experiment by M. J. Kushner [J. Phys. D: Appl. Phys. 38, 1633(2005]. The results for N e are compared with other emission experiments.

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Low electron density diagnostics: development of optical emission spectroscopic techniques and some applications to microwave induced plasmas

Cited by 88 publications

References 62 publications

Stark broadening tables for the helium I 447.1 line

Stark broadening tables for the helium I 447.1 line

Electron density measurement in atmospheric pressure plasma jets: Stark broadening of hydrogenated and non-hydrogenated lines

A contribution to spectroscopic diagnostics and cathode sheath modeling of micro-hollow gas discharge in argon

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