Experimental Stark widths and shifts for spectral lines of neutral and ionized atoms

Konjević, N.; Wiese, Wolfgang L.

doi:10.1063/1.555847

Cited by 276 publications

(174 citation statements)

References 0 publications

Supporting

Mentioning

165

Contrasting

Unclassified

Order By: Relevance

“…The N II line at 424.178 nm (w m = 0.1526 nm/10 23 m −3 ) is used to measure the density of nitrogen plasma jets in our experiment. The uncertainty of the parameter w m for this line is <23% [23].…”

Section: Uncertainty In Stark Parametermentioning

confidence: 84%

“…Theories that take into account additional effects such as Debye screening [19] and ion dynamics [20][21][22] have predicted Stark broadening of hydrogen Balmer lines in good agreement with experiments. Measurements of Stark broadening of non-hydrogenic spectral lines have also been tabulated for well-defined and independently measured plasma conditions [23,24].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Large density amplification measured on jets ejected from a magnetized plasma gun

Yun¹,

You²,

Bellan³

2007

Nucl. Fusion

View full text Add to dashboard Cite

Observation of a large density amplification in the collimating plasma jet ejected from a coplanar coaxial plasma gun is reported. The jet velocity is ∼30 km s −1 and the electron density increases from ∼10 20 to 10 22-23 m −3 . In previous spheromak experiments, electron density of the order 10 19-21 m −3 had been measured in the flux conserver region, but no density measurement had been reported for the source gun region. The coplanar geometry of our electrodes permits direct observation of the entire plasma dynamics including the source region. Analysis of Stark broadened spectral lines shows that the electron density increases by a factor of 100 as the jet collimates, with a peak density of up to 10 22-23 m −3 . The observed density amplification is interpreted according to an MHD theory that explains collimation of current-carrying plasma-filled magnetic flux tubes. Issues affecting interpretation of Stark broadened line profiles and the possibility of using the high-density plasma jet for tokamak fuel injection are discussed.

show abstract

Section: Uncertainty In Stark Parametermentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Large density amplification measured on jets ejected from a magnetized plasma gun

Yun¹,

You²,

Bellan³

2007

Nucl. Fusion

View full text Add to dashboard Cite

show abstract

“…The experimental data were obtained form various plasma sources with different plasma conditions and with different plasma diagnostic methods. These experimental conditions are summarized in Konjević & Roberts (1976); Konjević et al (1984); Konjević & Wiese (1990); Konjević et al (2002); Lesage (2009 Kusch (1971), which show higher values for He I 3889 (see Fig. 23) and lower values for He I 5016 (results not shown in Fig.…”

Section: Comparison With Other Resultsmentioning

confidence: 99%

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

Djurović

Savić

et al. 2014

A&A

View full text Add to dashboard Cite

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.

show abstract

“…One can see that our theoretical and the experimental shifts of Rathore et al (1984) are in good agreement, while their experimental widths have a very different behavior with temperature. We note here that in Konjević & Wiese (1990) these experimental results were critically evaluated and an accuracy of ±50% was attributed. Estimates of Stark broadening parameters based on the regularities and systematic trends of Rathore et al (1984) give better results for widths than for shifts where the sign of estimates of Rathore et al (1984) is different from their experimental values and our semiclassical perturbation results.…”

Section: Resultsmentioning

confidence: 99%

The influence of Stark broadening on Cr II spectral line shapes in stellar atmospheres

Dimitrijević

Ryabchikova

Simić

et al. 2007

A&A

View full text Add to dashboard Cite

Aims. We consider the effect of Stark broadening on the shapes of Cr ii spectral lines observed in stellar atmospheres of the middle part of the main sequence. Methods. Stark broadening parameters were calculated by the semiclassical perturbation approach. For stellar spectra synthesis, the improved version synth3 of the code synth for synthetic spectrum calculations was used. Results. Stark broadening parameters for Cr ii spectral lines of seven multiplets belonging to 4s − 4p transitions were calculated. New calculated Stark parameters were applied to the analysis of Cr ii line profiles observed in the spectrum of Cr-rich star HD 133792.Conclusions. We found that Stark broadening mechanism is very important and should be taken into account, especially in the study of Cr abundance stratification.

show abstract

Experimental Stark widths and shifts for spectral lines of neutral and ionized atoms

Cited by 276 publications

References 0 publications

Large density amplification measured on jets ejected from a magnetized plasma gun

Large density amplification measured on jets ejected from a magnetized plasma gun

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

The influence of Stark broadening on Cr II spectral line shapes in stellar atmospheres

Contact Info

Product

Resources

About