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Atoms 2014, 2(2), 259-276; doi:10.3390/atoms2020259
Article

Influence of Microfield Directionality on Line Shapes

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Received: 15 April 2014 / Revised: 2 June 2014 / Accepted: 5 June 2014 / Published: 19 June 2014
(This article belongs to the Special Issue Spectral Line Shapes in Plasmas)
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Abstract

In the framework of the Spectral Line Shapes in Plasmas Code Comparison Workshop (SLSP), large discrepancies appeared between the different approaches to account for ion motion effects in spectral line shape calculations. For a better understanding of these effects, in the second edition of the SLSP in August, 2013, two cases were dedicated to the study of the ionic field directionality on line shapes. In this paper, the effects of the direction and magnitude fluctuations are separately analyzed. The effects of two variants of electric field models, (i) a pure rotating field with constant magnitude and (ii) a time-dependent magnitude field in a given direction, together with the effects of the time-dependent ionic field on shapes of the He II Lyman-α and -β lines for different densities and temperatures, are discussed.
Keywords: spectral line shapes in plasmas; ion dynamics effects; ion microfield fluctuations spectral line shapes in plasmas; ion dynamics effects; ion microfield fluctuations
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Calisti, A.; Demura, A.V.; Gigosos, M.A.; González-Herrero, D.; Iglesias, C.A.; Lisitsa, V.S.; Stambulchik, E. Influence of Microfield Directionality on Line Shapes. Atoms 2014, 2, 259-276.

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