A study of Stark broadening for the diagnostic of runaway electrons in ITER

Rosato, J.; Pandya, Santosh P.; Logeais, Ch.; Meireni, Mutia; Hannachi, Ibtissem; Reichle, R.; Barnsley, R.; Marandet, Y.; Stamm, R.

doi:10.1063/1.4975733

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…Just as in our paper [71], Rosato et al applied their results to magnetic fusion, but they did not apply their results to solar physics-in distinction to our paper [71]. 3 We note that Rosato et al [83] attempted studying the Stark broadening of hydrogen line by a REB in magnetic fusion edge plasmas. However, they used the quasistatic approximation, which is totally inappropriate for the broadening by fast electrons of a REB (it is inappropriate even for the broadening by thermal electrons in such plasmas).…”

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confidence: 88%

Stark Broadening of Spectral Lines in Plasmas

Oks¹

2018

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Stark broadening of spectral lines remains an important tool for spectroscopic diagnostics of various types of laboratory and astrophysical plasmas. This is because laboratory and astrophysical plasmas contain various types of electric fields, such as the ion microfield, the electron microfield, fields of different kinds of electrostatic plasma turbulence, and laser/maser fields penetrating into plasmas. All these kinds of electric fields, differing by their statistical properties, strength, frequency, and possible polarization, cause a variety of types of Stark broadening of spectral lines in plasmas. Therefore, this research area is very important both fundamentally and practically, the latter being due to the numerous applications of plasmas. The practical applications range from the controlled thermonuclear fusion to plasma-based lasers and plasma sources of incoherent x-ray radiation as well as technological microwave discharges. Spectroscopic diagnostics based on Stark broadening are also indispensable tools for analyzing various astrophysical objects, such as solar plasmas (both for the quiet Sun and in solar flares), flare stars, white dwarfs, and so on. This book presents the latest research achievements in the area of Stark broadening of spectral lines in plasmas. It opens with three reviews describing the latest advances in analytical theory (with applications to various laboratory and astrophysical plasmas), in experimental studies of relativistic laser-plasma interactions, and in laboratory experiments facilitating the analysis of white dwarfs in astrophysics. These reviews are followed by seven original research papers devoted to a number of issues concerning Stark broadening of spectral lines in plasmas. They cover various experimental studies of laser-produced plasmas and theoretical studies presenting, in particular (but not exclusively), a new method for measuring ultra-strong magnetic fields, an improved method for measuring the electron density, as well as an advanced description of the radiative transfer.

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confidence: 88%

Stark Broadening of Spectral Lines in Plasmas

Oks¹

2018

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“…We note that Rosato et al[83] attempted studying the Stark broadening of hydrogen line by a REB in magnetic fusion edge plasmas. However, they used the quasistatic approximation, which is totally inappropriate for the broadening by fast electrons of a REB (it is inappropriate even for the broadening by thermal electrons in such plasmas).…”

mentioning

confidence: 95%

Review of Recent Advances in the Analytical Theory of Stark Broadening of Hydrogenic Spectral Lines in Plasmas: Applications to Laboratory Discharges and Astrophysical Objects

Oks

2018

Atoms

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There is presented an overview of the latest advances in the analytical theory of Stark broadening of hydrogenic spectral lines in various types of laboratory and astrophysical plasmas. They include: (1) advanced analytical treatment of the Stark broadening of hydrogenic spectral lines by plasma electrons; (2) center-of-mass effects for hydrogen atoms in a nonuniform electric field: applications to magnetic fusion, radiofrequency discharges, and flare stars; (3) penetrating-ions-caused shift of hydrogenic spectral lines in plasmas; (4) improvement of the method for measuring the electron density based on the asymmetry of hydrogenic spectral lines in dense plasmas; (5) Lorentz–Doppler broadening of hydrogen/deuterium spectral lines: analytical solution for any angle of observation and any magnetic field strength, and its applications to magnetic fusion and solar physics; (6) Revision of the Inglis-Teller diagnostic method; (7) Stark broadening of hydrogen/deuterium spectral lines by a relativistic electron beam: analytical results and applications to magnetic fusion; (8) Influence of magnetic-field-caused modifications of the trajectories of plasma electrons on shifts and relative intensities of Zeeman components of hydrogen/deuterium spectral lines: applications to magnetic fusion and white dwarfs; (9) Influence of magnetic-field-caused modifications of trajectories of plasma electrons on the width of hydrogen/deuterium spectral lines: applications to white dwarfs; (10) Stark broadening of hydrogen lines in plasmas of electron densities up to or more than Ne~1020 cm−3; and, (11) The shape of spectral lines of two-electron Rydberg atoms/ions: a peculiar Stark broadening.

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Spectroscopic models for the characterization of energetic particle beams in tokamak edge plasmas

Meireni

Hannachi

Rosato

et al. 2018

Contributions to Plasma Physics

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We examine the possibility for a diagnostic of energetic particle beams based on passive spectroscopy, with a focus on the atomic lines observed in the edge region of tokamaks. Our investigation employs a quasi‐linear model for the collective electric field generated by the plasma‐beam instability. If the beam is sufficiently energetic, the electric field can be comparable to the thermal Holtsmark microfield, and the corresponding Stark effect on atomic energy levels can be observable on spectra. We investigate this issue and perform new hydrogen line shape calculations. The applicability of the model to the diagnostics of runaway electrons is discussed.

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A study of Stark broadening for the diagnostic of runaway electrons in ITER

Cited by 5 publications

References 4 publications

Stark Broadening of Spectral Lines in Plasmas

Stark Broadening of Spectral Lines in Plasmas

Review of Recent Advances in the Analytical Theory of Stark Broadening of Hydrogenic Spectral Lines in Plasmas: Applications to Laboratory Discharges and Astrophysical Objects

Spectroscopic models for the characterization of energetic particle beams in tokamak edge plasmas

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