ABSORPTION CORRECTIONS FOR OPTICALLY THICK PLASMAS.

Abstract

A self-consistent, iterative method has been developed for inverting spatially integrated spectral intensities of spectral lines to local emission coefficients with correction for self-absorption. The method is applicable to plasmas which are axisymmetric, exhibit local thermodynamic equilibrium and whose total absorption along the plasma diameter does not exceed approximately 20%. As wavelength profiles of the spectral lines need not be measured, the method can be used to correct existing experimental data obtained with no special consideration having been given to the possibility of a significant self-absorption. A Fortran 4 computer program is included which has been applied to experimental data obtained with the free-burning argon arc plasma at pressures of 0.5, 1.1 and 2 atm. Corrected values for some argon transition probabilities are used to judge the accuracy of the method. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1970
Accession Number
AD0710218

Entities

People

  • H. N. Olsen

Tags

DTIC Thesaurus Topics

  • Absorption
  • Accuracy
  • Axisymmetric
  • Coefficients
  • Computer Programs
  • Computers
  • Diameters
  • Emission
  • Experimental Data
  • Intensity
  • Probability
  • Spectral Lines
  • Transitions

Fields of Study

  • Physics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Plasma Physics.
  • Spectroscopy.