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Reexamining the Stark width and shift of He ii Paschen-α: Studies using laser-induced plasma, Thomson scattering, and computer simulations.
Phys Rev E
June 2024
Faculty of Physics, Weizmann Institute of Science, Rehovot 7610001, Israel.
We report on experimental and theoretical studies on the Stark profile of the He ii Paschen-α line over a wide range of plasma parameters. This line was emitted from a laser-induced plasma with electron densities in the range of 8.1×10^{22}-4.
View Article and Find Full Text PDFDynamic Stark broadening as the Dicke narrowing effect.
Phys Rev E Stat Nonlin Soft Matter Phys
January 2010
PIIM, UMR6633, Centre Saint Jérôme, Université de Provence-CNRS, Marseille, France.
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.
View Article and Find Full Text PDFMeasurements of Hbeta Stark central asymmetry and its analysis through standard theory and computer simulations.
Phys Rev E Stat Nonlin Soft Matter Phys
April 2009
Department of Physics, Faculty of Sciences, 21000 Novi Sad, Serbia.
Experimental measurements of the center of the H_{beta} Stark profile on three different installations have been done to study its asymmetry in wide ranges of electron density, temperature, and plasma conditions. Theoretical calculations for the analysis of experimental results have been performed using the standard theory and computer simulations and included separately quadrupolar and quadratic Stark effects. Earlier experimental results and theoretical calculations of other authors have been reviewed as well.
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