Production of highly ionized species in high-current pulsed cathodic arcs

Sanginés, R.; Israel, A. M.; Falconer, I. S.; McKenzie, D. R.; Bilek, M. M. M.
May 2010
Applied Physics Letters;5/31/2010, Vol. 96 Issue 22, p221501
Academic Journal
Time resolved optical diagnostic techniques were used to study the production of highly ionized species in aluminum plasma produced by a centered-triggered high-current pulsed cathodic arc. Controlling the spacing between cathode spots enabled a correlation between a reduction in the mean charge state and an increase in the spacing of cathode spots to be observed. As the cathode current was increased, the distances between spots were reduced and these charge states were produced for longer times. Strong cathode spot coupling is proposed as a mechanism for the production of high charge states.


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