Arc plasma in air with calcium and fluorine—II. Effect of fluorine on radial distribution of calcium particles

The radial distributions of temperature, Ca and Ca⁺ spectral line intensities, and CaO and CaF bands intensities were determined in a d.c. arc. The results, when combined with the calculation of the plasma composition, made it possible to determine the radial distribution of the total calcium in the plasma without and with fluorine. The addition of F caused a higher gradient in the radial density distribution of Ca in the plasma. This might have been caused by chemical reactions between Ca and F which occurred at the arc periphery and probably induced a change in the mass transport parameters.