Effect of an Electric Field on an Optical Breakdown in the Air Stream
https://doi.org/10.25205/2541-9447-2021-16-2-48-58
Abstract
Experimental data on the effect of an electric field on the plasma of an optical discharge in an air flow have been obtained. Two configurations of an external electric field under the action of an optical discharge on the plasma are considered. To create an electric field, flat (the field along the beam and across the flow) and ring electrodes (the field across the laser beam and along the flow) were used. It was found that there are two modes of combined discharge (optical and electrical). When the field was created symmetrically with respect to the flow axis, an electrical breakdown was observed from the nozzle exit (positively charged electrode) to the focusing point of the laser beam, while no streamers were observed in the optical discharge wake. In another case, an electric discharge is realized between flat electrodes simultaneously with optical breakdown. In a field of constant strength above 3 kV/cm, the presence of an optical discharge plasma promoted electrical breakdown of the medium. In this case, the parameters of the electrical breakdown depended on the shape of the electrodes, the polarity of the applied voltage, and the air flow rate.
Keywords
experimental simulation,
laser radiation,
optical discharge,
electric field,
electrical discharge,
air stream
Supporting agencies: This work was carried out within the framework of a state assignment (state registration no. 121030500157-3) and with partial financial support from the Russian Foundation for Basic Research (grant no. 19-08-00304).
About the Authors
V. N. Zudov
Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Vladimir N. Zudov, Doctor of Sciences (Physics and Mathematics)
Novosibirsk
A. V. Tupikin
Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Andrey V. Tupikin, Doctor of Sciences (Physics and Mathematics)
Novosibirsk
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Review
For citations:
Zudov V.N., Tupikin A.V. Effect of an Electric Field on an Optical Breakdown in the Air Stream. SIBERIAN JOURNAL OF PHYSICS. 2021;16(2):48-58. (In Russ.) https://doi.org/10.25205/2541-9447-2021-16-2-48-58
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