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Axial Distributions of Spectral Line Intensities in the Arc Under the Influence of External Rotating Magnetic Field

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The influence of external rotating magnetic field (RMF) on the electric arc plasma, and therefore the axial distributions of the spectral line intensities and the atomic concentrations of the investigated elements in the plasma, was studied. The axial distribution of the spectral line intensities has, in all of the investigated cases, such a shape that the intensity has a maximum close to the cathode in the case of a cathode excitation as well as in the case of an anode excitation. At that, there is a very significant influence of the RMF on the axial distributions of spectral line intensities of the investigated elements. The effect of the RMF on the arc, in the case of anode excitation, leads to an outstanding increase of spectral line intensities in the zones close to the cathode, whereas in the case of a cathode excitation, it leads to an expanding of the zones close to the cathode with relatively higher spectral line intensities. Determining the particle concentrations has shown that the shape of particle concentration axial distribution curves and spectral line intensity axial distribution curves of the same element is very similar. Thus, a conclusion is drawn about a great influence of the particle concentration axial distribution on the spectral line intensity axial distribution of the considered elements.

Keywords: Rotating magnetic field; Spectral line intensities; dc arc

Document Type: Research Article


Affiliations: School of Technology and Metallurgy, Department of Physical Sciences, University of Belgrade, Yugoslavia

Publication date: September 1, 1981

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