Dynamic Stark broadening as the Dicke narrowing effect.
A very fast method to account for charged particle dynamics effects in calculations of spectral line shape emitted by plasmas is presented. This method is based on a formulation of the frequency fluctuation model (FFM), which provides an expression of the dynamic line shape as a functional of the static distribution of frequencies. Thus, the main numerical work rests on the calculation of the quasistatic Stark profile. This method for taking into account ion dynamics allows a very fast and accurate calculation of Stark broadening of atomic hydrogen high- n series emission lines. It is not limited to hydrogen spectra. Results on helium- beta and Lyman- alpha lines emitted by argon in microballoon implosion experiment conditions compared with experimental data and simulation results are also presented. The present approach reduces the computer time by more than 2 orders of magnitude as compared with the original FFM with an improvement of the calculation precision, and it opens broad possibilities for its application in spectral line-shape codes.
Calisti
A
A
PIIM, UMR6633, Centre Saint Jérôme, Université de Provence-CNRS, Marseille, France. annette.calisti@univ-provence.fr
Mossé
C
C
Ferri
S
S
Talin
B
B
Rosmej
F
F
Bureyeva
L A
LA
Lisitsa
V S
VS