Victor Tarasenko
Institute of High Current Electronics, Siberian Branch (SB), Russian Academy of Sciences (RAS), 2/3 Akademicheskii Ave., Tomsk, 634055, Russia
Dmitry Beloplotov
Institute of High Current Electronics, Siberian Branch (SB), Russian Academy of Sciences (RAS), 2/3 Akademicheskii Ave., Tomsk, 634055, Russia
Alexander Burachenko
Institute of High Current Electronics, Siberian Branch (SB), Russian Academy of Sciences (RAS), 2/3 Akademicheskii Ave., Tomsk, 634055, Russia
Evgenii Baksht
Institute of High Current Electronics, Siberian Branch (SB), Russian Academy of Sciences (RAS), 2/3 Akademicheskii Ave., Tomsk, 634055, Russia
The conditions for the formation of spark channels with a bead structure in an inhomogeneous electric field at different polarities of voltage pulses are studied. Voltage pulses with an amplitude of up to 150 kV and a rise time of ≈1.5 µs were applied across a 45-mm point-to-plane gap. Under these conditions, spark channels consisting of bright and dim regions (bead structure) were observed. It is shown that when current is limited, an increase in the rise time and the gap length does not affect the formation of the bead structure. It was found that an increase in the amplitude of voltage pulses leads to an increase in the length of beads. The appearance of the bead structure is more likely at negative polarity of the pointed electrode. The formation of spark channels was studied with a four-channel ICCD camera.
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[15] Beloplotov, D. V., & Tarasenko, V. F. (2019). Formation of a small ‘bead lightning’in a half-microsecond discharge in air. Physics Letters A, 383(4), 351-357. https://doi.org/10.1016/j.physleta.2018.11.004
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[21] Runaway Electrons Preionized Diffuse Discharges. / Editors: V.F. Tarasenko. Published by Nova Science Publishers, Inc. New York. USA. 2014. 598 p.
[22] Generation of runaway electron beams and X-rays in high pressure gases, Volume 1: / Editors: V.F. Tarasenko. Published by Nova Science Publishers, Inc. New York. USA. 2016. 405 p.
[23] Generation of runaway electron beams and X-rays in high pressure gases, Volume 2: / Editors: V.F. Tarasenko. Published by Nova Science Publishers, Inc. New York. USA. 2016. 333 p.
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