Hydrogen Balmer lines for low electron number density plasma diagnostics

Konjević, N.; Ivković, M.; Sakan, N. M.

doi:10.1016/j.sab.2012.06.026

Cited by 178 publications

(158 citation statements)

References 39 publications

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“…and, therefore, the FWHM. A higher maximum leads to a FWHM larger than 0.6 nm and therefore a larger electron density, but the Voigt fit was performed according to procedure recommended in [21] with the fixed Gaussian "contribution" into the line's width, which resulted in the profile shown in Figure 4c. …”

Section: Electron Densitymentioning

confidence: 99%

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Detailed Investigation of the Electric Discharge Plasma between Copper Electrodes Immersed into Water

Venger

Tmenova

Valensi

et al. 2017

Atoms

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Abstract:A phenomenological picture of pulsed electrical discharge in water is produced by combining electrical, spectroscopic, and imaging methods. The discharge is generated by applying 350 µs long 100 to 220 V pulses (values of current from 400 to 1000 A, respectively) between the point-to-point copper electrodes submerged into the non-purified tap water. Plasma channel and gas bubble occur between the tips of the electrodes, which are initially in contact with each other. The study includes detailed experimental investigation of plasma parameters of such discharge using the correlation between time-resolved high-speed imaging, electrical characteristics, and optical emission spectroscopic data. Radial distributions of the electron density of plasma is estimated from the analysis of profiles and widths of registered H α and H β hydrogen lines, and Cu I 515.3 nm line, exposed to the Stark mechanism of spectral lines' broadening. Estimations of the electrodes' erosion rate and bubbles' size depending on the electrical input parameters of the circuit are presented. Experimental results of this work may be valuable for the advancement of modeling and the theoretical understanding of the pulse electric discharges in water.

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Section: Electron Densitymentioning

confidence: 99%

“…The FWHM of a Voigt profile can be represented through the combination of the Gauss and Lorentz components as follows [21]:…”

Section: Appendix Amentioning

confidence: 99%

Detailed Investigation of the Electric Discharge Plasma between Copper Electrodes Immersed into Water

Venger

Tmenova

Valensi

et al. 2017

Atoms

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“…The electron number density values listed in Table 2 are compared with approximate, simple formulae presented in the most recent review on Stark broadening by Konjević [47]. For a measured Stark width, w S , one can use for the H β line [47] …”

Section: Hydrogen Gas Optical Breakdownmentioning

confidence: 99%

“…For the LIBS community, an emission spectroscopy review by Aragón and Aguilera [45] discusses in great detail requirements for experimental arrangements, important details on emission spectroscopy, determination of electron number density and temperature, and considerations of optically thin conditions including spatial deconvolution approaches. The recent reviews by Konjević [46,47] emphasize Stark versus other broadening, the importance of Abel inversion and provide empirical equations for electron number density estimates from hydrogen Balmer line widths. Recent visualization techniques include Radon transform tomography that is shown to be important in studies of asymmetric laser spark evolution [48].…”

Section: Introductionmentioning

confidence: 99%

Atomic and molecular emissions in laser-induced breakdown spectroscopy

Parigger

2013

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…The characteristics of the bound state transitions in plasma diagnostics are well known, an almost mandatory method [15]. The usage of the hydrogen lines as a probing method for the plasma characteristics is also well known and widely used in plasmas of moderate and small non-ideality [16]. In accordance with that previously mentioned, the continuation of research of the presented approach is the inclusion of the bound-bound photo absorption process using the same model potential.…”

Section: Introductionmentioning

confidence: 59%

The Application of the Cut-Off Coulomb Model Potential for the Calculation of Bound-Bound State Transitions

Sakan

Srećković

Simić

et al. 2018

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Abstract:In this contribution, we present results of bound state transition modeling using the cut-off Coulomb model potential. The cut-off Coulomb potential has proven itself as a model potential for the dense hydrogen plasma. The main aim of our investigation include further steps of improvement of the usage of model potential. The results deal with partially ionized dense hydrogen plasma. The presented results covers N e = 6.5 × 10 18 cm −3 , T = 18, 000 K and N e = 1.5 × 10 19 cm −3 , T = 23, 000 K, where the comparison with the experimental data should take place, and the theoretical values for comparison. Since the model was successfully applied on continuous photoabsorption of dense hydrogen plasma in the broad area of temperatures and densities, it is expected to combine both continuous and bound-bound photoabsorption within single quantum mechanical model with the same success.

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Hydrogen Balmer lines for low electron number density plasma diagnostics

Cited by 178 publications

References 39 publications

Detailed Investigation of the Electric Discharge Plasma between Copper Electrodes Immersed into Water

Detailed Investigation of the Electric Discharge Plasma between Copper Electrodes Immersed into Water

Atomic and molecular emissions in laser-induced breakdown spectroscopy

The Application of the Cut-Off Coulomb Model Potential for the Calculation of Bound-Bound State Transitions

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