Equivalence of the method of the kinetic equation and the fluctuating-frequency method in the theory of the broadening of spectral lines

Bureeva, L. A.; Kadomtsev, M. B.; Levashova, M.G.; Lisitsa, V. S.; Calisti, A.; Talin, B.; Rosmej, F. B.

doi:10.1134/s0021364009220032

Cited by 16 publications

(28 citation statements)

References 4 publications

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“…Four codes participated in the comparison: QC-FFM and PPP are codes based on the Frequency Fluctuation Model (FFM) [5,6]. QC-FFM [7] uses FFM to add ion dynamics on top of the quasi-contiguous model [8], i.e.…”

Section: The Codesmentioning

confidence: 99%

The Fourth Workshop on Lineshape Code Comparison: Line Merging

Alexiou¹,

Stambulchik

Gomez

et al. 2018

Preprint

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For a given set of plasma parameters, along a single series (Lyman, Balmer etc) the lines with higher principal quantum number(n) lines get progressively wider, closer to each other, and start merging for a certain critical n. In the present work four different codes(with further options) are used to calculate the entire Balmer series for moderate and high electron densities. Particular attention is paid to the relevant physics, such as the cutoff criteria, strong and penetrating electron collisions.

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Section: The Codesmentioning

confidence: 99%

The Fourth Workshop on Lineshape Code Comparison: Line Merging

Alexiou¹,

Stambulchik

Gomez

et al. 2018

Preprint

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show abstract

“…Four codes participated in the comparison: QC-FFM and PPP are codes based on the Frequency Fluctuation Model (FFM) [5,6]. Briefly, the quasi-contiguous (QC) model [7] uses a rectangular approximation for the static lineshape.…”

Section: The Codesmentioning

confidence: 99%

The Fourth Workshop on Lineshape Code Comparison: Line Merging

Alexiou

Stambulchik

Gomez

et al. 2018

Atoms

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Abstract:For a given set of plasma parameters, along a single series (Lyman, Balmer, etc.) the lines with higher principal quantum number (n) lines get progressively wider, closer to each other, and start merging for a certain critical n. In the present work, four different codes (with further options) are used to calculate the entire Balmer series for moderate and high electron densities. Particular attention is paid to the relevant physics, such as the cutoff criteria, strong and penetrating electron collisions.

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“…As to now, the above mentioned problem has been solved by different methods: (1) the model microfield method (MMM) [10][11][12], (2) the method of molecu lar dynamics (MMD) [13,14], and (3) the method of fluctuating frequency (MFF) [5,6,15,16]. The first two methods are widely and efficiently used in the cur rent theory of broadening.…”

Section: Peculiarities Of the Problem Of Calculation Of Spectral Linementioning

confidence: 99%

“…(iii) The ion dynamics effects, irrespective of their value, can be taken into account correctly with the method of kinetic equation [5,6].…”

Section: Choice Of a Model For Calculating The Shapes Of Hydrogen Spementioning

confidence: 99%

“…To determine the line shapes, we used simplified models [4] to calculate the Zeeman-Stark structure of spectral lines, whereas dynamically broad ened shapes of the lines were derived on the basis of the new kinetic theory of broadening [5,6]. For different lines of sight in the ITER divertor, we have calculated contours of the P 7 Paschen line located near the laser scattering signal, and have examined contributions of different broadening mechanisms.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen lines in the infrared region and spectral background for the thomson scattering diagnostics of the iter divertor plasma

et al. 2012

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Calculations are made of the plasma spectral background, which is important for the Thomson scattering diagnostics in the ITER divertor. Theoretical grounds have been elaborated for computing the hydrogen spectral line shapes in the infrared spectral region for a divertor plasma in ITER. The shape of the P 7 Paschen line (transition n = 7 n = 3) located near the laser scattering signal has been calculated for various lines of sight in the ITER divertor. Contributions from different mechanisms of broadening the P 7 line have been examined. The spectral intensities of bremsstrahlung and photorecombination continuum have been calculated. All calculations use data on the spatial distribution of temperatures and densities of all species of plasma particles computed with the SOLPS4.3 code for basic operation regimes of the ITER diver tor.

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Equivalence of the method of the kinetic equation and the fluctuating-frequency method in the theory of the broadening of spectral lines

Cited by 16 publications

References 4 publications

The Fourth Workshop on Lineshape Code Comparison: Line Merging

The Fourth Workshop on Lineshape Code Comparison: Line Merging

The Fourth Workshop on Lineshape Code Comparison: Line Merging

Hydrogen lines in the infrared region and spectral background for the thomson scattering diagnostics of the iter divertor plasma

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