Study of directed ion velocities in a vacuum arc by an emission method |
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Authors: | A. S. Bugaev V. I. Gushenets A. G. Nikolaev E. M. Oks G. Yu. Yushkov |
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Affiliation: | (1) High Current Electronics Institute, Siberian Division, Russian Academy of Sciences, Akademicheskii pr. 4, Tomsk, 634055, Russia |
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Abstract: | Directed ion velocities in a vacuum arc discharge plasma are measured on the basis of a study of the ion emission current response to a rapid change of arc current. It is shown that these velocities are about 106 cm/s, are determined by the cathode material, and are almost independent of the ion charge number. Applying a magnetic field results in an increase in the directed ion velocity. As the gas pressure increases, the directed ion velocity decreases; this is the only case where the directed velocities are observed to depend on the ion charge number. |
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