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Modeling of Stark‐Broadened Lines in a Fluctuating Edge Plasma
Author(s) -
Rosato J.,
Marandet Y.,
Peiffer A.,
Capes H.,
GodbertMouret L.,
Koubiti M.,
Stamm R.
Publication year - 2014
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201410045
Subject(s) - stark effect , plasma , balmer series , line (geometry) , atomic physics , physics , probability density function , quantum mechanics , emission spectrum , spectral line , mathematics , statistics , geometry
A line shape model that accounts for low‐frequency fluctuations is applied to the Balmer series of the hydrogen isotopes (atomic transitions n → 2). The plasma fluid parameters (density, temperature, etc.) are described as random variables characterized by a prescribed joint probability density function. A special emphasis is devoted to Stark broadened lines, which are sensitive to the plasma density. It is shown that fluctuations can lead to a significant increase of the line width if the fluctuation level Δ N e /〈 N e 〉 (with 〈 N e 〉 and Δ N e being respectively the density averaged along the line‐of‐sight and its RMS value) is large. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)