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Formation of diffuse and spark discharges between two needle electrodes with the scattering of particles

Plasma Science and Technology 2024年第9期26卷 32-39页

作者： Victor F TARASEnKO Dmitry V BELOPLOTOV alexei n panchenko Dmitry A SOROKIn Institute of High Current Electronics Siberian BranchRussian Academy of SciencesTomsk 634055Russia national Research Tomsk State University Tomsk 634050Russia

The development of a nanosecond discharge in a pin-to-pin gap filled with air at atmospheric pressure has been studied with high temporal and spatial resolutions from a breakdown start to the spark *** and negative nanosecond voltage pulses with an amplitude of tens of kilovolts were ***-resolved images of the discharge development were taken with a fourchannel Intensified Charge Coupled Device(ICCD)*** minimum delay between the camera channels could be as short as≈0.1 *** made it possible to study the gap breakdown process with subnanosecond *** was observed that a wide-diameter streamer develops from the high-voltage pointed *** ionization processes near the grounded pin electrode started when the streamer crossed half of the *** bridging the gap by the streamer,a diffuse discharge was *** development of spark leaders from bright spots on the surface of the pointed electrodes was observed at the next *** was found that the rate of development of the spark leader is an order of magnitude lower than that of the wide-diameter *** thin luminous tracks were observed against the background of a discharge plasma *** has been established that the tracks are adjacent to brightly glowing spots on the electrodes and are associated with the flight of small particles.

关键词： needle electrodes short voltage pulses atmospheric air streamer breakdown diffuse and spark discharges scattering metal particles

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Diffuse discharges in SF_(6)and mixtures of SF_(6)with H_(2),formed by nanosecond voltage pulses in non-uniform electric field

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High Voltage 2018年第4期3卷 316-322页

作者： alexei n.panchenko Victor F.Tarasenko Dmitry V.Beloplotov nikolay A.panchenko Mikhail I.Lomaev Institute of High Current Electronics Siberian Branch(SB)Russian Academy of Sciences(RAS)Tomsk 634055Russia Faculty of Innovative Technologies National Research Tomsk State UniversityTomsk 634050Russia Department of Photonics and Quantum Electronics National Research Tomsk Polytechnic UniversityTomsk 634050Russia Department of Physics Tomsk State University of Control Systems and RadioelectronicsTomsk 634050Russia

Results of experimental study of nanosecond diffuse discharge in SF_(6)and gas mixtures of SF_(6)with H_(2),D_(2)and C_(2)H_(6)are *** aim of this work is to study parameters of discharge between two extended electrodes with a small radius of curvature in SF_(6)and SF_(6)with *** was shown that diffuse discharge can be formed in SF_(6)at elevated pressure between blade electrodes with length of 30 *** was also confirmed that in a sharply non-uniform electric field a beam of runaway electrons is generated and that the gap breakdown occurs due to ionisation waves which begin on electrodes with small radius of *** action in the infrared spectral region was obtained in SF_(6)-H_(2)(D_(2),C_(2)H_(6))*** laser output up to 110 mJ was easily achieved which corresponds to ultimate intrinsic efficiency(with respect to deposited energy)of 10%.

关键词： breakdown uniform radius

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