Influence of a current jump on vacuum arc parameters

Based on time of flight method, influence of short time vacuum arc current jump on arc plasma parameters were investigated. Superposition of the current pulse of a vacuum arc with a high operating voltage results in the appearance of ions of higher charge state in the discharge plasma and in an incr...

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Bibliographic Details
Published in:IEEE transactions on plasma science 1999-08, Vol.27 (4), p.882-887
Main Authors: Bugaev, A.S., Gushenets, V.I., Nikolaev, A.G., Oks, E.M., Yushkov, G.Y.
Format: Article
Language:English
Subjects:
Cathodes
Charge
Control systems
Discharge
Electric potential
Estimates
Ion beams
Ion charge
Ion sources
Ion velocity
Ions
Physics
Plasma diagnostics
Plasma materials processing
Plasma properties
Radio control
Time of flight method
Vacuum arcs
Voltage
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Summary:Based on time of flight method, influence of short time vacuum arc current jump on arc plasma parameters were investigated. Superposition of the current pulse of a vacuum arc with a high operating voltage results in the appearance of ions of higher charge state in the discharge plasma and in an increase in the mean ion charge state for most of the cathode materials used in the experiment. The method of a "short-time current jump" can be also used to investigate the parameters of a vacuum arc, in particular to estimate the ion direct velocities in vacuum arc plasmas. Our estimates show that in the presence of a current step the ion velocities are almost identical for all differently charged ions and depend only on the peak current and the ion mass.
ISSN:0093-3813
1939-9375
DOI:10.1109/27.782254