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| 1 | Runaway electrons during subnanosecond breakdowns in high-pressure gases显示文摘The parameters of runaway electrons produced in nanosecond high-voltage discharges in different gases(air,nitrogen,sulphur hexafluoride,krypton,argon,methane,neon,hydrogen,helium)at atmospheric and higher pressure were studied.An optical analysis was also performed to investigate the ionisation dynamics in diffuse discharges in nitrogen and nitrogen-containing mixtures.At breakdown of a point-to-plane gap by nanosecond(≃2 ns)high-voltage(≃200 kV)pulses of negative voltage polarity and gas pressure above 0.1 MPa,a supershort avalanche electron beam(SAEB)was detected by a collector behind the flat anode.For pressure>0.1 MPa of nitrogen and other gases it is shown that the maximum pressure for SAEB registration decreases with increasing the voltage pulse rise time.Therefore,to detect a SAEB at atmospheric and higher gas pressure,one should use voltage pulses with an amplitude of hundred kilovolts and rise time of∼1 ns and shorter.The experimental research in the dynamics of optical radiation from the discharge plasma shows that the breakdown in which runaway electrons are produced develops as an ionisation wave. | Victor F.Tarasenko Mikhail I.Lomaev Dmitry V.Beloplotov Dmitry A.Sorokin | 2016 | High Voltage2016，1，4： | 1 |
| 2 | Influence of electrode spacing and gas pressure on parameters of a runaway electron beam generating during the nanosecond breakdown in SF_(6) and nitrogen显示文摘This study deals with experimental and theoretical simulation data showing the influence of electrode spacing and gas pressure on parameters of a supershort avalanche electron beam(SAEB)formed in SF_(6) and nitrogen at different rise times and amplitudes of a voltage pulse.Using GIN-55-01,VPG-30-200,and SLEP-150M pulsers,tubular cathodes with a diameter of 6 mm,as well as gaps of 3,5,and 8 mm,it was shown that the SAEB current amplitude can both increase and decrease depending on an electrode spacing,a waveform and a rise time of the voltage pulse,as well as the pressure of SF6 and nitrogen.It was established as a result of simulation that maximal voltage across the gap during the process of generation of runaway electrons and the thickness of an anode foil have a major effect on the SAEB current pulse amplitude. | Victor F.Tarasenko Cheng Zhang Andrey V.Kozyrev Dmitry A.Sorokin Xingmin Hou Natalya S.Semeniuk Alexander G.Burachenko Ping Yan Vasily Yu.Kozhevnikov Evgenii Kh.Baksht Mikhail I.Lomaev Tao Shao | 2017 | High Voltage2017，2，2： | 1 |
| 3 | Review of supershort avalanche electron beam during nanosecond-pulse discharges in some gases显示文摘Supershort avalanche electron beam(SAEB)plays an important role in nanosecond-pulse discharges.This paper aims at reviewing ex-periments results on characteritics of SAEB and its spectra in different gases in nanosecond-pulse discharges.All the joint experiments were carried in the Institute of High Current Electronics of the Russian Academy of Sciences and the Institute of Electrical Engineering of the Chinese Academy of Sciences.In these experiments,the generation of a SAEB in SF 6 in an inhomogeneous electric field was studied on three generators with pulse rise times of 0.3,0.5 and~2 ns.Firstly,the comparison of SAEB parameters in SF 6 with those obtained in other gases(air,nitrogen,argon,and krypton)is introduced.Secondly,the SAEB spectra in SF 6 and air at pressures of 10 kPa(75 torr),and 0.1 MPa(750 torr)are reviewed and discussed.Finally,1.5-D theoretical simulation of the supershort pulse of the fast electron beam in a coaxial diode filled with SF 6 at atmospheric pressure is described.The simulation was carried out in the framework of hybrid model for discharge and runaway electron kinetics.The above research progress can provide better understanding of the investigation into the mechanism of nanosecond-pulse discharges. | Victor F.Tarasenko Cheng Zhang Evgenii Kh.Baksht Alexander G.Burachenko Tao Shao Dmitry V.Beloplotov Mikhail I.Lomaev Ping Yan Andrey V.Kozyrev Natalia S.Semeniuk | 2017 | Matter and Radiation at Extremes2017，2，3： | 1 |
| 4 | 大气压空气纳秒脉冲板-板放电中逃逸电子产生机理显示文摘经典放电理论(Townsend和流注理论)解释纳秒脉冲气体放电存在局限性,近年来基于高能电子逃逸的纳秒脉冲气体放电理论研究受到广泛关注.但是目前对大气压空气纳秒脉冲板-板放电中逃逸电子产生机理研究仍较少,严重阻碍了纳秒脉冲放电等离子体的应用发展.本文利用一维粒子模型,对幅值为20 kV的纳秒脉冲电压驱动下,间隙长为1 mm的板-板电极之间的大气压空气放电中逃逸电子的产生机理进行了数值模拟研究..结果表明,在空间电荷动力学行为的影响下,板-板电极之间出现了增强电场区域,使得电子可以满足电子逃逸判据而进入逃逸模式.此外,还观察到放电通道前逃逸电子的预电离效应导致了二次电子崩的产生,随着二次电子崩与放电通道不断汇聚,引导并加速了放电通道的发展,最终导致气隙击穿.本研究进一步揭示了纳秒脉冲板-板放电机理,拓展了纳秒脉冲气体放电基础理论,为纳秒脉冲放电等离子体的应用和发展开辟了新的机会. | 肖江平 戴栋 Victor F.Tarasenko 邵涛 | 2023 | 物理学报2023，72，10： | 0 |
| 5 | Methods for recording the time profile of single ultrashort pulses of electron beams and discharge currents in real-time mode显示文摘The collectors for measuring the time profile of a current pulse of the runaway electron beam that are generatedunder atmospheric pressure are described. An analysis of changes in pulse shape depending on the bandwidth of theregistration path with a temporal resolution of up to 20 ps was performed. It is shown that the electron beam detectedbehind small-diameter diaphragms has a complex structure, which depends on the parameters of the gas diode. Thereis a design of the current shunts with a temporal resolution of up to 100 ps in this study. Measurement techniques ofvoltage pulses with subnanosecond and nanosecond duration are briefly described. | Victor F.Tarasenko Dmitry V.Rybka | 2016 | High Voltage2016，1，1： | 0 |
| 6 | Subnanosecond high-voltage breakdown initiated in high-pressure nitrogen by a runaway electron beam显示文摘This study reports on subnanosecond breakdowns initiated on high pressure nitrogen by a runaway electron beam in an inhomogeneous electric field.It is shown that a diffuse discharge with a duration of≥1 ns is formed in the gas diode.Data are reported for the first time on collector measurements of a supershort avalanche electron beam downstream of an anode foil at a nitrogen pressure of 0.5–1.2 MPa.The beam pulsewidth at these pressures is∼90 ps.At a nitrogen pressure of 1.2 MPa,the number of electrons with an energy>70 keV recorded by the collector is 4×10^(6)/cm^(2). | Alexander G.Burachenko Victor F.Tarasenko Evgenii Kh.Baksht | 2017 | High Voltage2017，2，2： | 0 |
| 7 | Diffuse discharges in SF_(6)and mixtures of SF_(6)with H_(2),formed by nanosecond voltage pulses in non-uniform electric field显示文摘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 presented.The 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 additives.It was shown that diffuse discharge can be formed in SF_(6)at elevated pressure between blade electrodes with length of 30 cm.It 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 curvature.Laser action in the infrared spectral region was obtained in SF_(6)-H_(2)(D_(2),C_(2)H_(6))mixtures.The laser output up to 110 mJ was easily achieved which corresponds to ultimate intrinsic efficiency(with respect to deposited energy)of 10%. | Alexei N.Panchenko Victor F.Tarasenko Dmitry V.Beloplotov Nikolay A.Panchenko Mikhail I.Lomaev | 2018 | High Voltage2018，3，4： | 0 |
| 8 | Neutrons in a nanosecond low-pressure discharge in deuterium显示文摘Stable neutron generation with a yield of ~1.2×10^(4) neutrons per pulse was obtained during d(d,n)^(3)He reaction initiated by the high-voltage nanosecond discharge in a gap with a potential tungsten cylinder(anode)and a grounded deuterated zirconium plate(cathode)filled with deuterium at a pressure of ~10^(2) Pa.Estimated duration of the neutron pulse was ~1.5 ns.Less intensive neutron emission was registered without deuterated plate.Splashing of material of the tungsten electrode was observed during the high-voltage nanosecond discharge in the deuterium,hydrogen,helium and argon at pressures of 10^(2)-10^(4) Pa. | Victor F.Tarasenko Mikhail I.Lomaev Dmitry A.Sorokin Boris A.Nechaev Vladimir N.Padalko Gennady N.Dudkin | 2016 | Matter and Radiation at Extremes2016，1，4： | 0 |
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