[en] A new table of Stark–Zeeman line shapes is provided for plasma diagnostics in the framework of magnetic fusion research. Spectral profiles of Dα, Dβ, Dγ, Dδ, and Dε have been calculated using computer simulations in conditions relevant to tokamak edge and divertor plasmas. After a brief presentation of the calculation method, we propose an interpolation formula and we give a routine for diagnostic applications. Analyses of experimental and synthetic spectra are performed as an illustration. - Highlights: • A new table of Stark–Zeeman line shapes is provided for plasma diagnostics. • The calculations were performed using a computer simulation technique, which serves as a reference in the elaboration of Stark broadening models. • Analyses of experimental and synthetic spectra in tokamak divertor plasma conditions are performed as an illustration.

[en] Spectral profiles of the Dγ line have been calculated in magnetic fusion plasma conditions for diagnostic purposes. This paper reports on the elaboration of a table devoted to spectroscopic applications in tokamak divertors. An overview of the method, together with the physics underlying the broadening of spectral lines, is given. A special emphasis is put on the role of the simultaneous action of the Stark and Zeeman effects. - Highlights: • We present new calculations of Stark–Zeeman line shapes for magnetic fusion plasma diagnostics. • The sensitivity of spectra to the electron density is examined. • Applications to synthetic diagnostics in a virtual plasma background are discussed

[en] This report summarizes the proceedings of the Decennial IAEA Technical Meeting on Atomic, Molecular and Plasma-Material Interaction Data for Fusion Science and Technology that was held on 15-19 December 2014 at the Daejeon Convention Center in Daejeon, Republic of Korea, hosted by the National Fusion Research Institute (NFRI). More than 60 participants from 16 Member States, two from the ITER organization as well as two from the IAEA attended the meeting. The objective of this meeting was to review the current status of activities in atomic, molecular and plasma-material data for fusion applications, identify priorities for data-oriented work and recommend future activities for the IAEA atomic and molecular data unit. (author)

[en] In this work, we use a passive advection model for ion temperature fluctuations, in order to investigate their effects on Doppler Spectral line shapes. The relevance of the model is discussed in the framework of the Braginskii equations, and the subsequent Probability Density Function evaluation relies on results obtained in neutral fluids. The resulting Doppler line profiles are shown to exhibit characteristic exponential tails. (copyright 2006 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

[en] Balmer line and continuum spectral emission of hydrogen are modeled for detached divertor plasmas (electron density, n_e∼10²⁰-10²¹ m ⁻³ and electron temperature, T_e∼1 eV) of Tokamaks. The Stark broadened high-n lines are calculated considering electronic broadening using the impact approximation. Continuum emission is calculated using analytical equations for radiative recombination and bremsstrahlung. Discrete to continuum transition is modeled using a dissolution factor approach. (paper)

[en] Spectral line shapes and intensities are used for obtaining information on the various regions of magnetic fusion devices. Emission from low principal quantum numbers of hydrogen isotopes is analyzed for understanding the complex recycling mechanism. Lines emitted from high principal quantum numbers of hydrogen and helium are dominated by Stark effect, allowing an electronic density diagnostic in the divertor. Intensities of lines emitted by impurities are fitted for a better knowledge of ion transport in the confined plasma

[en] In this paper we present some investigations of the broadening mechanisms affecting the emission line profiles of impurities present in the divertor regions of tokamaks. For that purpose, we have considered two visible lines (C IV n = 5-6 and n = 6-7) emitted by lithium-like carbon ions for which the contributions of the Zeeman, Stark and Doppler effects are examined. The paper is focused on the impact of differing electron and ion temperatures on the broadening and shapes of the C IV n = 6-7 line for conditions relevant to a detached tokamak divertor plasma. It is shown, that the C IV n = 6-7 line profile calculated with differing electron and ion temperatures may be significantly different from the one calculated with equal temperatures but the same density. This suggests that the electron density determination from the fit of the measured spectra of such a line may be inaccurate when using equal ion and electron temperatures instead of differing ones. (copyright 2014 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

[en] We examine atomic line shapes in a magnetized hydrogen plasma. The Lorentz electric field v × B present in the emitters' frame of reference yields a perturbation of the atomic energy levels, which is commonly referred to as a ‘motional’ Stark effect. This effect results in a broadening of the lines owing to the statistical repartition of the atoms' velocities. We address this line broadening mechanism with numerical simulations. It is shown that Balmer line shapes can be affected at plasma conditions relevant to magnetic fusion experiments. An application to the diagnostic of an atomic temperature is suggested and discussed within a line width analysis. The possibility for a modification of the Inglis–Teller limit, which provides an estimate of the principal quantum number of the last resolved line in a series, is also discussed. (paper)

[en] To diagnose recombining plasmas obtained under detachment conditions in axisymmetric divertor regions of tokamaks (fusion devices) like JET, a spectroscopic analysis method has been developed. The method is based on the modeling of entire deuterium emission spectra composed of high-n Balmer lines extending to or beyond the series limit. A numerical code has been constructed by coupling a Stark line shape code to both an analytical approach developed for the smooth merging of lines into the continuum and a collisional-radiative model for the deuterium atomic level populations. The code has been incorporated into a fitting procedure allowing the simultaneous determination of the electron density and temperature of JET detached plasmas from deuterium line and continuum spectra

[en] The nonlinear coupling of Langmuir, ion sound and electromagnetic waves can create wave collapse conditions in a plasma, and modify the line shapes emitted by hydrogen atoms. Such conditions may appear in the presence of a strong source of energy, and create numerous regions where wave packets localize and the plasma density is decreased. We use a model of envelope solitons for the electric field acting on the emitter, and calculate the dipole autocorrelation function and the line shape with a numerical simulation. We investigate the role of the frequency of wave packets, and propose an approach retaining a dispersion relation ω(k). (paper)