Accession Number : AD0710218

Title :   ABSORPTION CORRECTIONS FOR OPTICALLY THICK PLASMAS.

Descriptive Note : Final rept.,

Corporate Author : PLASMA SCIENCES LABS INC VAN NUYS CALIF

Personal Author(s) : Olsen,H. N.

Report Date : MAR 1970

Pagination or Media Count : 69

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)

Descriptors :   (*PLASMA MEDIUM, LINE SPECTRA), ABSORPTION SPECTRA, INTENSITY, MEASUREMENT, EXPERIMENTAL DATA, CORRECTIONS, COMPUTER PROGRAMS, ARGON

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE