Line shapes in turbulent plasmas

Stamm, R.; Hannachi, Ibtissem; Meireni, Mutia; Capes, H.; Godbert‐Mouret, L.; Koubiti, M.; Rosato, J.; Marandet, Y.; Dimitrijević, M. S.; Simić, Zoran

doi:10.1140/epjd/e2017-70737-2

Cited by 5 publications

(5 citation statements)

References 29 publications

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“…Assuming the collisional-radiative equilibrium is established much faster than the hydromotion, the intensity of a discrete spectral line or continuum radiation in a turbulent plasma can be obtained in the static approximation [17], viz.,…”

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confidence: 99%

Turbulent stagnation in a Z -pinch plasma

et al. 2018

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The ion kinetic energy in a stagnating plasma was previously determined by Kroupp et al. [Phys. Rev. Lett. 107, 105001 (2011)PRLTAO0031-900710.1103/PhysRevLett.107.105001] from Doppler-dominated line shapes augmented by measurements of plasma properties and assuming a uniform-plasma model. Notably, the energy was found to be dominantly stored in hydrodynamic flow. Here we advance a new description of this stagnation as supersonically turbulent. Such turbulence implies a nonuniform density distribution. We demonstrate how to reanalyze the spectroscopic data consistent with the turbulent picture and show that this leads to better concordance of the overconstrained spectroscopic measurements, while also substantially lowering the inferred mean density.

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confidence: 99%

Turbulent stagnation in a Z -pinch plasma

et al. 2018

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“…In one of the most recent studies [1] performed at Vulcan Petawatt facility in the UK, thin Si foils were irradiated by relativistic laser pulses (intensities ~10 21 W/cm 2 ). In addition to the Langmuir waves, there were discovered spectroscopically, for the first time, ion acoustic waves in laser-produced, highdensity plasmas.…”

Section: In-depth Study Of Intra-stark Spectroscopy In the X-ray Rang...mentioning

confidence: 99%

“…Despite both the analytical theory of the broadening of ANY H/D line by non-quasimonochromatic Langmuir waves and the observation of this effect were achieved already in 1970s, in several recent publications their authors tried to "re-invent the wheel" [16][17][18][19][20]. Of course, these simulations of selected H/D line did not discover anything new compared to the analytical theory from 1970s, The authors of those simulations seem to be totally unaware of both the corresponding analytical theory and the observation of this effect from 1970s by Sholin's group: they did not make any reference -just as in paper [21], the authors did not refer to about half-a-hundred theoretical and experimental studies of lineshape-based diagnostics of plasma turbulence in laboratory and astrophysical plasmas published between 1970 and (including) 2017, despite this was the subject of paper [21].…”

Section: Stark Broadening Of Hydrogen/deuterium Spectral Lines By a R...mentioning

confidence: 99%

Review of recent advances in the analytical theory of Stark broadening of spectral lines in plasmas: applications to laboratory discharges and astrophysical plasmas

Oks

2023

J. Phys.: Conf. Ser.

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We present an overview of latest advances in the analytical theory of Stark broadening of spectral lines and their applications to various types of laboratory and astrophysical plasmas. They include: 1) in-depth study of intra-Stark spectroscopy in the x-ray range in relativistic laser-plasma interactions; 2) effect of diamagnetism on the number of observable hydrogen lines in plasmas; 3) influence of magnetic-field-caused modifications of trajectories of plasma electrons on the width of hydrogen/deuterium spectral lines: applications to white dwarfs; 4) Stark broadening of hydrogen/deuterium spectral lines by a relativistic electron beam: analytical results and applications to magnetic fusion; 5) counterintuitive dependence of the dynamical Stark width of hydrogenic spectral lines on the electron density.

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“…The results from paper [5] were also presented in one section of paper [7]. It should be noted that paper [7] had a broad title "Line Shapes in Turbulent Plasmas".…”

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confidence: 93%

“…It should be noted that paper [7] had a broad title "Line Shapes in Turbulent Plasmas". Regrettably, the authors of paper [7] seem to be ignorant of dozens and dozens of theoretical and experimental papers on the subject of line shapes in turbulent plasmas that started in Sholin's group as early as 1970s and was continued by various theoretical and experimental groups around the world through 2017 (see, e.g., paper [8], book [1] and references from [1,8]).…”

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confidence: 99%

Diagnostic of Langmuir Solitons in Plasmas Using Hydrogenic Spectral Lines

Oks

2019

Atoms

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The development of various spectroscopic diagnostics of relatively weak Langmuir waves in plasmas and their successful implementation have a history of over 50 years. As for spectroscopic diagnostics of Langmuir solitons (i.e., relatively strong Langmuir waves) in plasmas, there have only been very few theoretical papers. The most promising result so far was based on using satellites of the dipole-forbidden spectral lines of He, Li, or He-like and Li-like ions. It was shown that, in the case of Langmuir solitons, the peak intensity of the satellites of the dipole-forbidden lines can be significantly enhanced—by orders of magnitude—compared to the case of non-solitonic Langmuir waves. This distinctive feature of satellites under Langmuir solitons allows them to be distinguished from non-solitonic Langmuir waves. In the present paper, we perform a general study of the effects of Langmuir solitons on arbitrary spectral lines of hydrogen or hydrogen-like ions. Then, using the Ly-beta line as an example, we compare the main features of the profiles for the case of the Langmuir solitons with the case of the non-solitonic Langmuir waves of the same amplitude. We also show how the line profiles depend on the amplitude of the Langmuir solitons and on their separation from each other within the sequence of the solitons.

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Line shapes in turbulent plasmas

Cited by 5 publications

References 29 publications

Turbulent stagnation in a Z -pinch plasma

Turbulent stagnation in a Z -pinch plasma

Review of recent advances in the analytical theory of Stark broadening of spectral lines in plasmas: applications to laboratory discharges and astrophysical plasmas

Diagnostic of Langmuir Solitons in Plasmas Using Hydrogenic Spectral Lines

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