Laser Probe Investigations of the Initial Stage of Spark Discharge in Air in the Tip (Cathode)–Plane Gap

Tren’kin, A. A.; Almazova, K. I.; Belonogov, A. N.; Borovkov, V. V.; Gorelov, E. V.; Morozov, I.; Kharitonov, S. Yu.

doi:10.1134/s1063784220120270

Cited by 7 publications

(23 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1. The majority of its elements were characterized in detail in [4,5]. Pulsed voltage generators (PVGs) output voltage pulses with an amplitude of 25 kV and a 0.1−0.9 rise time of approximately 7 ns.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…At the same time, it was found in [4][5][6][7][8][9][10] that discharges being uniform in outward appearance may feature an internal microstructure (i.e., be composed of a large number of microchannels).…”

Section: Introductionmentioning

confidence: 99%

“…The microstructure within the volume of a discharge gap has been detected relatively recently with the use of laser probing and shadow and interference techniques based on it [4][5][6][7]. The mechanism of microchannel formation due to instability of the ionization front at the initial discharge phase is regarded as one of the most plausible explanations of this phenomenon [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Various types of gas discharges have been demonstrated to be microstructured [4][5][6][7][8][9][10]. In view of this, the question of the influence of preionization on the spatial structure of such discharges appears intriguing and practically relevant.…”

Section: Introductionmentioning

confidence: 99%

“…This study is a continuation of [4,5], but differs from them in that the two-frame version of the shadow photography technique was used. This expands considerably the opportunities for collection of data on the processes associated with gas discharges.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Influence of preionization on the microchannel structure of a spark discharge in air in a pin-plane gap

et al. 2022

View full text Add to dashboard Cite

The initial phase of a spark discharge in the gap between the pin(cathode) and a plane 1.5 mm long in atmospheric pressure air underconditions of preliminary photoionization by an auxiliary discharge wasinvestigated by the method of shadow photography. In the absence ofpreionization, the discharge from the first nanoseconds after breakdown isan aggregate of a large number of micron-diameter channels. It was foundthat the electron concentration resulting from preionization, estimated at108-109cm-3, increases the degree of uniformity of the discharge channel inthe near-cathode region; however, in the near-anode region, the channelremains microstructured. Within the framework of the mechanism ofmicrostructure formation due to the instability of the ionization wavefront, a criterion for the formation of a uniform discharge is obtained andan explanation of the results obtained is presented. Keywords: spark discharge, preionization, photoionization, instability of the ionization front, microstructure, shadow photography method\

show abstract

Section: Experimental Setup and Proceduresmentioning

confidence: 99%