Abstract
A coalesced high-intensity dc discharge is maintained between three cathodes and a single anode, stabilized by using resistors on each cathode leg. Jets of plasma gas are produced from either the cathode area or the anode area of the device. Cathode jets are generated by the self-induced pumping at the cathode tips and augmented by central gas injection. Arc voltage-current characteristics show classical convection-stabilized arc behavior. Anode heat transfer rates may be substantially increased by central gas injection toward the anode. Temperature fields in the coalesced, axially symmetric portion of the arc are determined spectrometrically and compared to those of a classical single-cathode free-burning arc.
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Young, R.M., Pfender, E. A novel approach for introducing particulate matter into thermal plasmas: The triple-cathode arc. Plasma Chem Plasma Process 9, 465–481 (1989). https://doi.org/10.1007/BF01023914
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DOI: https://doi.org/10.1007/BF01023914