Current distribution measurements inside an electromagnetic plasma gun operated in a gas-puff mode

Measurements are presented of the time-dependent current distribution inside a coaxial electromagnetic plasma gun. The measurements are carried out using an array of six axially distributed dual-Rogowski coils in a balanced circuit configuration. The radial current distributions indicate that operat...

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Bibliographic Details
Published in:Physics of plasmas 2010-12, Vol.17 (12), p.123508-123508-11
Main Authors: Poehlmann, Flavio R., Cappelli, Mark A., Rieker, Gregory B.
Format: Article
Language:English
Subjects:
CAPACITANCE
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CURRENTS
DISTRIBUTION
ELECTRIC COILS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTRODES
INDUCTANCE
IONIZATION
Low-Temperature Plasmas, Plasma Applications, Plasma Sources, Sheaths
PHYSICAL PROPERTIES
PLASMA DIAGNOSTICS
PLASMA GUNS
ROGOWSKI COIL
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Summary:Measurements are presented of the time-dependent current distribution inside a coaxial electromagnetic plasma gun. The measurements are carried out using an array of six axially distributed dual-Rogowski coils in a balanced circuit configuration. The radial current distributions indicate that operation in the gas-puff mode, i.e., the mode in which the electrode voltage is applied before injection of the gas, results in a stationary ionization front consistent with the presence of a plasma deflagration. The effects of varying the bank capacitance, transmission line inductance, and applied electrode voltage were studied over the range from 14 to 112   μ F , 50 to 200 nH, and 1 to 3 kV, respectively.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.3526603