Stark broadening tables for the helium I 447.1 line

Ma, Guojun; González, Manuel Á.

doi:10.1051/0004-6361/200912243

Cited by 26 publications

(31 citation statements)

References 55 publications

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“…[22] with the NIST atomic data [23]. The Stark broadening parameters of the He I lines, including the F-A separation and ratio, have been previously tabulated [24,25]; the agreement between these calculations and our results is within 10% for the plasma parameters considered in the present study.…”

Section: B Spectral Lines At D C = 5 Mmsupporting

confidence: 80%

Spectroscopic study of plasma evolution in runaway nanosecond atmospheric-pressure He discharges

et al. 2013

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Time- and space-resolved visible-emission spectroscopy measurements are applied to study plasma parameters in nanosecond electrical discharges in He gas at pressure of 10(5) Pa, using a 150 kV, 5 ns duration high-voltage pulse. The plasma evolution during the discharge is investigated by applying line-shape analysis of several He I spectral transitions, with the Stark and opacity effects accounted for. The analysis shows that the discharge plasma is not in equilibrium and that significant electric fields of several kV/cm are present in the plasma during the discharge. Regions of plasma with significantly different electron densities are identified and a qualitative model of the plasma formation and evolution is proposed.

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Section: B Spectral Lines At D C = 5 Mmsupporting

confidence: 80%

Spectroscopic study of plasma evolution in runaway nanosecond atmospheric-pressure He discharges

et al. 2013

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“…First, from the distance between the peaks of the He I 4471 according to Pérez et al (1996), which have a value of 2.04 × 10 23 m −3 , or through the expression supplied by Ivković et al (2010), which leads to a value of 2.07×10 23 m −3 . However, a comparison of the whole profile of this line to the simulation results (Gigosos & González 2009) (see Fig. 10) provides a value of 2.40 × 10 23 m −3 .…”

Section: Plasma Diagnosticsmentioning

confidence: 83%

“…The physical model considered and the mathematical details of the calculation procedure can be found in Gigosos & Cardeñoso (1996), Gigosos &González (2009), andLara et al (2012). Here we give a summary of the technique and point out the particular details of this work.…”

Section: Stark-broadening Profile Calculationsmentioning

confidence: 99%

“…As in our previous works (Gigosos & González 2009), the differential equation of the emitter's evolution is integrated numerically by taking the analytical solution of Eq. (4), which corresponds to a time interval Δt, the time step of the simulation, that is short enough to consider, in this time, the perturbing electric field constant.…”

Section: Stark-broadening Model In Computer Simulationsmentioning

confidence: 99%

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Stark broadening of lines from transition between statesn = 3 ton = 2 in neutral helium

Djurović

Savić

et al. 2014

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Context. The Stark broadening of the spectral lines of the wavelengths 501. 6, 667.8, 728.1, 388.9, 587.6, and 706.5 nm from neutral helium in plasmas are studied theoretically and experimentally. Aims. The aim of this work is to provide information about the connection between the shape and width of spectral lines and the electron density and temperature to be used as a diagnostic tool. Methods. The theoretical calculations were carried out through molecular dynamics computer simulations with noninteracting particles. The experimental measurements were done in a plasma of pure helium generated in an electromagnetically driven T-tube. The plasma diagnostics used previous results about the Stark broadening of the He I 447.1 nm and He I 492.2 nm lines and the coherence between the shape of these spectra and those obtained here. The electron temperature was obtained through a Boltzmann-plot of eight lines of Si II. Results. Several tables of width and shift are provided in a wide range of electron density and temperature. Furthermore, we supply several fitting formulas, which allow calculating the plasma electron density from the measured values of the spectral line widths. The results obtained in the laboratory and in the simulations are compared with the data from the literature.

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“…[4][5][6] and references therein). Recently, their profiles as calculated using computer simulation (CS) technique have been published for a large range of electron density n e [7,8]. Although the Stark broadening of He lines is relatively well researched and there are many bibliographic data, it is not always possible to use it as a plasma probe.…”

Section: Introductionmentioning

confidence: 99%

Study of Stark broadening of Li i 460 and 497 nm spectral lines with independent plasma diagnostics by Thomson scattering

Dzierżęga

Pięta

Zawadzki

et al. 2018

Plasma Sources Sci. Technol.

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We present results of experimental and theoretical studies of the Stark broadening of the LiI 460 nm spectral line with forbidden components and of the isolated 497 nm line. Plasma was induced by Nd:YAG laser radiation at 1064nm with pulse duration ∼4.5ns. Laser-induced plasma was generated in front of the alumina pellet, with some content of Li 2 CO 3 , placed in a vacuum chamber filled with argon under reduced pressure. Plasma diagnostics was performed using the laser Thomson scattering technique, free from assumptions about the plasma equilibrium state and its composition and so independently of plasma emission spectra. Spatially resolved spectra with Li lines were obtained from the measured, laterally integrated ones applying the inverse Abel transform. The Stark profiles were calculated by computer simulation method assuming a plasma in the local thermodynamic equilibrium. Calculations were performed for experimentally-inferred electron densities and temperatures, from 1.422×10 23 to 3.55×10 22 m −3 and from 1.96eV to 1.04eV, respectively. Our studies show very good agreement between experimental Stark profiles and those computer simulated.

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Stark broadening tables for the helium I 447.1 line

Cited by 26 publications

References 55 publications

Spectroscopic study of plasma evolution in runaway nanosecond atmospheric-pressure He discharges

Spectroscopic study of plasma evolution in runaway nanosecond atmospheric-pressure He discharges

Stark broadening of lines from transition between statesn = 3 ton = 2 in neutral helium

Study of Stark broadening of Li i 460 and 497 nm spectral lines with independent plasma diagnostics by Thomson scattering

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