Spectral line shape code for multielectron emitters

Technical Report · Wed Mar 01 04:00:00 EST 1989

DOI:https://doi.org/10.2172/7243926· OSTI ID:7243926

Calisti, A.; Khelfaoui, F.; Stamm, R.; Sylvander, L.; Talin, B. ^[1]

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1. Aix-Marseille-1 Univ., 13 - Marseille (France)

This report describes a computer code providing theoretical line profiles of multielectron radiators in plasmas. The line profiles are calculated for a selected spectral range, in the presence of natural broadening, doppler and stark effect. The model used for the description of stark effect assumes that the plasma and atomic structure parameters are such that the static ion microfield approximation and the model of a binary collision electronic operator are valid. Whereas an electronic collision operator can usually safely be used, neglecting ion motion requires that the width of the line is much larger than the typical fluctuation frequency of the ion microfield (ion plasma frequency). A careful check for the validity of this approximation has to be done for hot and dense plasma conditions. Breakdown of the static approximation occur especially for hydrogenic emitters. For multielectron emitters a large validity domain of the static ion approximation is usually found. In this static ion model, an average is performed over a static microfield distribution. For this quantity, the APEX model is used, which allows for calculations in the coupled plasma domain. 4 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA); Aix-Marseille-1 Univ., 13 - Marseille (France)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7243926
• Report Number(s): UCRL-21298; ON: DE90008526
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
BOLTZMANN-VLASOV EQUATION
COMPUTER CALCULATIONS
DIFFERENTIAL EQUATIONS
DIPOLES
DOCUMENT TYPES
DOPPLER BROADENING
ELECTRIC DIPOLES
ELECTRONIC STRUCTURE
ENERGY SPECTRA
EQUATIONS
LINE BROADENING
LINE WIDTHS
MATRIX ELEMENTS
MULTIPOLES
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA
PROGRESS REPORT
SPECTRA
STARK EFFECT