Abstract

The Spectral Line Shapes in Plasmas (SLSP) code comparison workshop series [...]

Highlights

  • The first Special Issue of Atoms under this title was published in 2014 [2,3], covering selected topics from the first two workshops

  • With the hope of establishing tradition, we decided to arrange for the present Special Issue as a place for disseminating new results obtained in the course of the 3rd and 4th Spectral Line Shapes in Plasmas (SLSP) workshops

  • The results presented in this Special Issue represent only a part of the SLSP workshop outcomes, with more studies expected to be published elsewhere

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Summary

New Codes and Algorithms

For a code comparison workshop, the appearance of new codes and algorithms is most welcome. Lineshape data analysis is typically performed by varying a set of plasma parameters until the calculated spectrum fits best the experimental one. This straightforward approach soon becomes unmanageable in case of complex (multi-line, multi-species) spectra and/or a large number of free parameters. It is noteworthy to compare results of this study with multi-code analyses of the Balmer-β and He I 492.2-nm lines done separately by Sheeba et al in [6,7], respectively In the latter, it is shown that accounting for line broadening by neutrals can be crucial for correct data interpretation. Gomez et al [8] describe how this can be done using a matrix method

Hydrogen-Like Transitions
Isolated Lines
Conclusions

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