A table of Balmer γ line shapes for the diagnostic of magnetic fusion plasmas

Rosato, J.; Bufferand, Hugo; Koubiti, M.; Marandet, Y.; Stamm, R.

doi:10.1016/j.jqsrt.2015.06.018

Cited by 8 publications

(3 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, modeling of such spectra is a very complicated task, as it is necessary to diagonalize the Hamiltonian of an atom in crossed magnetic and fluctuating electric fields. A great deal of theoretical work has been dedicated to this issue [14,[18][19][20][21][22][23]. However, these calculation are often hard to reproduce.…”

Section: Semiclassical Methods Of Line Shape Calculation In Magnetize...mentioning

confidence: 99%

Review of Rydberg Spectral Line Formation in Plasmas

Letunov,

Lisitsa

2023

Atoms

View full text Add to dashboard Cite

The present review is dedicated to the problem of an array of transitions between highly-excited atomic levels. Hydrogen atoms and hydrogen-like ions in plasmas are considered here. The presented methods focus on calculation of spectral line shapes. Fast and simple methods of universal ionic profile calculation for the Hnα (Δn=1) and Hnβ (Δn=2) spectral lines are demonstrated. The universal dipole matrix elements formulas for the Hnα and Hnβ transitions are presented. A fast method for spectral line shape calculations in the presence of an external magnetic field using the formulas for universal dipole matrix elements is proposed. This approach accounts for the Doppler and Stark–Zeeman broadening mechanisms. Ion dynamics effects are treated via the frequency fluctuation model. The accuracy of the presented model is discussed. A comparison of this approach with experimental data and the results of molecular dynamics simulation is demonstrated. The kinetics equation for the populations of highly-excited ionic states is solved in the parabolic representation. The population source associated with dielectronic recombination is considered.

show abstract

Section: Semiclassical Methods Of Line Shape Calculation In Magnetize...mentioning

confidence: 99%

Review of Rydberg Spectral Line Formation in Plasmas

Letunov,

Lisitsa

2023

Atoms

View full text Add to dashboard Cite

show abstract

“…LSNS involves a numerical integration of the time-dependent Schrödinger equation for the hydrogen wave function under the influence of a fluctuating electric field obtained from a particle simulation. More details can be found in Reference [4] and the references therein. SimU is well described in References [5,6].…”

Section: Brief Description Of the Codesmentioning

confidence: 99%

H-β Line in a Corona Helium Plasma: A Multi-Code Line Shape Comparison

Sheeba

Koubiti

Bonifaci

et al. 2018

Atoms

View full text Add to dashboard Cite

Many spectroscopic diagnostics are routinely used as techniques to infer the plasma parameters from line emission spectra, but their accuracy depends on the numerical model or code used for the fitting process. However, the validation of a line shape code requires some steps: the comparison of the line shape code with other similar codes for some academic (simple) cases and then for more complex ones, the comparison of the fitting parameters obtained from the best fit of the experimental spectra with those obtained with other diagnostic techniques, and/or the comparison of the fitting parameters obtained by different codes to fit the same experimental data. Here we compare the profiles of the hydrogen Balmer β line in helium plasma computed by five codes for a selected set of plasma parameters and we report on the plasma parameters inferred by each of them from the fitting to a number of experimental spectra measured in a helium corona discharge where the pressure was in the range of 1-5 bars.

show abstract

“…Application of the frequency-fluctuation model to Stark-Zeeman line shapes was demonstrated by Ferri et al [25]. Again, this work considers only the transitions between levels with a low value of the principal quantum number n. Computer modeling, taking into account the largest possible number of effects on the shape of spectral lines, is presented in the works of Rosato et al [26,27].…”

Section: Introductionmentioning

confidence: 99%

The Coulomb Symmetry and a Universal Representation of Rydberg Spectral Line Shapes in Magnetized Plasmas

Letunov

Lisitsa

2020

Symmetry

View full text Add to dashboard Cite

A new method of line shape calculations of hydrogen-like atoms in magnetized plasmas is presented. This algorithm makes it possible to solve two fundamental problems in the broadening theory: the analytical description of the radiation transition array between excited atomic states and an account of a thermal ion motion effect on the line shapes formation. The solution to the first problem is based on the semiclassical approach to dipole matrix elements calculations and the usage of the specific symmetry properties of the Coulomb field. The second one is considered in terms of the kinetic treatment of the frequency fluctuation model (FFM). As the result, one has a universal description of line shapes under the action of the dynamic of ion’s microfield. The final line shape is obtained by the convolution of the ionic line shape with the Voigt electron Doppler profile. The method is applicable formally for large values of principal quantum numbers. However, the efficiency of the results is demonstrated even for well known first members of the hydrogen Balmer series Dα and Dβ lines. The comparison of obtained results with accurate quantum calculations is presented. The new method may be of interest for investigations of spectral line shapes of hydrogen-like ions presented in different kinds of hot ionized environments with the presence of a magnetic field, including So L and divertor tokamak plasmas.

show abstract

A table of Balmer γ line shapes for the diagnostic of magnetic fusion plasmas

Cited by 8 publications

References 40 publications

Review of Rydberg Spectral Line Formation in Plasmas

Review of Rydberg Spectral Line Formation in Plasmas

H-β Line in a Corona Helium Plasma: A Multi-Code Line Shape Comparison

The Coulomb Symmetry and a Universal Representation of Rydberg Spectral Line Shapes in Magnetized Plasmas

Contact Info

Product

Resources

About