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Population Density and LTE of Excited Atoms in a Positive-Column Plasma. II. Measurement on Argon
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References
1973
Year
EngineeringGlow DischargePlasma SciencePlasma PhysicsExcited AtomsExternal Discharge ParametersNon-lte KineticsPopulation DensityMagnetohydrodynamicsIon EmissionElectron DensityElectrical EngineeringPhysicsElectron Density IncreasesApplied Plasma PhysicAtomic PhysicsPositive-column PlasmaCosmic RayNatural SciencesSpectroscopyApplied PhysicsGas Discharge Plasma
A calculation is made to relate external discharge parameters to internal plasma parameters for a positive column of Ar produced by a steady or pulsed DC-discharge. The plasma and energy balance equations and Ohm's law based on the theory of Tonks and Langmuir, and on that of Schottky are numerically solved, and the calculated plasma parameters are compared with the measurements for various external parameters of the experiments. On the basis of the calculations, population densities of excited ArI levels are obtained as a function of the electron density at an electron temperature of 50,000 K in a steady DC-discharge of Ar, and it has been proved that, as shown in a previous paper, they change from coronal to full-saturation phases as the electron density increases.