Quasicontiguous frequency-fluctuation model for calculation of hydrogen and hydrogenlike Stark-broadened line shapes in plasmas

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.

show abstract

“…QC-FFM [7] uses FFM to add ion dynamics on top of the quasi-contiguous model [8], i.e. a rectangular approximation for the static lineshape.…”

Section: The Codesmentioning

confidence: 99%

The Fourth Workshop on Lineshape Code Comparison: Line Merging

Alexiou¹,

Stambulchik

Gomez

et al. 2018

Preprint

View full text Add to dashboard Cite

show abstract

“…Furthermore, it has also been the basis of other calculation methods, such as the Quasicontiguous frequency (QC) FFM [90] used to obtain analytically high-n n >> 1 transitions which are typically cumbersome to simulate. The FFM permits researchers to obtain good quality complex line profiles with calculation times shorter than those needed for computer simulations, without sacrificing data quality.…”

Section: I(ωe) Is the Broadened Profile Due To The Impact Electrons mentioning

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.

197

179

View full text Add to dashboard Cite

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.

show abstract

“…Briefly, the quasi-contiguous (QC) model [7] uses a rectangular approximation for the static lineshape. QC-FFM [8] improves by using the FFM to add ion dynamics on top of the quasi-contiguous model. QC-FFM does not recognize or treat strong collisions; instead it uses FFM to account for the dynamics of both electrons and ions.…”

Section: The Codesmentioning

confidence: 99%

The Fourth Workshop on Lineshape Code Comparison: Line Merging

Alexiou

Stambulchik

Gomez

et al. 2018

Atoms

View full text Add to dashboard Cite

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.

show abstract

Quasicontiguous frequency-fluctuation model for calculation of hydrogen and hydrogenlike Stark-broadened line shapes in plasmas

Cited by 30 publications

References 24 publications

The Fourth Workshop on Lineshape Code Comparison: Line Merging

The Fourth Workshop on Lineshape Code Comparison: Line Merging

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

The Fourth Workshop on Lineshape Code Comparison: Line Merging

Contact Info

Product

Resources

About