Computer Science
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jqsrt..22..389t&link_type=abstract
Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 22, Oct. 1979, p. 389-395.
Computer Science
6
Aluminum, Boundary Layer Plasmas, Line Spectra, Plasma Heating, Shock Heating, Stark Effect, Optical Resonance, Optical Thickness, Radiative Transfer, Spectral Line Width, Temperature Gradients, Thermodynamic Equilibrium
Scientific paper
The influence of temperature and density gradients in the boundary layer of an Al(CH3)3-seeded shock-heated plasma on the Stark profiles of the Al(I) resonance lines 3961.5 A and 3944 A is investigated by solving the radiative transfer equation. The thermal boundary layer thickness is varied from 0 to 1 cm, assuming complete local thermodynamic equilibrium (LTE) throughout the inhomogeneous region. The calculations show that the line profiles are distorted. For the plasma conditions of an experiment, it is shown that reabsorption diminishes the intensity and displaces the maxima of the profiles of both resonance lines in the same relative proportions. Thus, the ratios of their half-widths and of their shifts are practically independent of the boundary-layer effect. It is concluded, therefore, that the measured difference of the half-widths of the Al(I) resonance doublet must be an intrinsic plasma effect.
Drawin H. W.
Truong-Bach Mr.
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