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Fast Electrons Behind the Plane-grid Cathode at Nanosecond discharge in Atmospheric Pressure Air

高电压技术 2013年第9期39卷 2138-2144页

作者： E. H. Baksht A. V. Kozyrev i. d. kostyrya d. V. Rybka V. F. Tarasenko institute of High Current Electronics SB RAS 2/3 Akademichesky Ave. Tomsk 634055 Russia

Breakdown of atmospheric pressure air gaps with combined design of the cathode at the voltage pulse rise rate equal to 1014V/s has been studied with picoseconds’temporal *** assembly has a structure consisting of a flat thin foil and a grid of parallel foil thin *** the space behind the cathode foil a fast electron flow was *** current value of the fast electron beam recorded behind the cathode is essentially influenced by the anode *** a grid cathode and flat anode,the spectra of fast electrons generated both in direct(towards the anode)and reverse directions have been reconstructed by the attenuation curves.

关键词：阴极组件平面网格大气压力空气间隙快电子排放纳秒阳极材料

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GENERATiON OF RUNAWAY ELECTRONS ANd X-RAYS iS AN ORdiNARY PHENOMENON iN diFFUSE diSCHARGES iN AN iNHOMOGENEOUS ELECTRiC FiELd 19th

GENERATION OF RUNAWAY ELECTRONS AND X-RAYS IS AN ORDINARY PH...

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The ⅪⅩ international Conference on Gas discharges and Their Applications

作者： V F TARASENKO i d kostyrya d V RYBKA E Kh BAKSHT A G BURACHENKO M i LOMAEV High Current Electronics institute

ISBN: (纸本)9771003651221

The paper reports the properties of supershort avalanche electron beam(SAEB) and x-ray formed in different gases at pressures from 1 torr up to 1 *** is shown that at a nanosecond discharge in the atmospheric pressure air and SAEB current recording through a small area of the foil the pulse duration behind the foil is no more than 25 ps,but from all surface of foil is about 100 *** A1 foil of thickness 10μm, the number of electrons from the entire foil anode in the atmospheric pressure air was 6.2·10 per pulse and this corresponds to a SAEB amplitude of～100 A at a 100-ps triangular pulse *** is shown that the highest amplitudes of SAEB with pulse duration about 100 ps are attained in helium,hydrogen, and nitrogen at a pressure of about 60,30,and 10 torr,*** the extracted data, estimates show that with the generator SLEP used,optimization of all parameters of the gas diode makes possible a SAEB current amplitude of about 500 A at a helium pressure of 60 torr. As the mode of the beam generation is changed due to the decrease in pressure from the above noted values,one can gradually control the FWHM of the beam current pulse between 100 and 500 ps in all gases studied.

关键词： Pressure Electric fields Gases indium RUNAWAY ELECTRONS positronium foils X-rays pulse duration Air Pressure discharge gas diode

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dynamic Characteristics in Subnanosecond Breakdown and Generation of Supershort Avalanche Electron Beam

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高电压技术 2013年第9期39卷 2207-2215页

作者： Victor F. Tarasenko SHAO Tao dmitry V. Rybka ZHANG Cheng Alexandr G. Burachenko igor' d. kostyrya Mikhail i. Lomaev Ping Yan Evgeni Kh. Baksht institute of High Current Electronics Russian Academy of Sciences Tomsk 634055 Russia institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China Key Laboratory of Power Electronics and Electric drive Chinese Academy of Sciences Beijing 100190 China

in this paper,subnanosecond-pulse and one-nanosecond-pulse generators are used to study the breakdowns in highly overvolted gaps in atmospheric pressure *** different cathodes,we measured the applied voltage and discharge current to investigate the dynamic characteristics in the subnanosecond breakdown during the generation of a supershort avalanche electron ***,characteristics of dynamic displacement current are presented in the current paper,which is detected between the ionization wave front and a plane *** is shown that during a subnanosecond voltage rise time,the amplitude of the dynamic displacement current can be higher than 4 *** is demonstrated that the breakdown in the air gap is assisted by ionization processes between the ionization wave front and a plane anode.

关键词：动力学特性亚纳秒电子束击穿雪崩超短纳秒脉冲发生器电离过程

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Social structure and space use of Amur tigers(Panthera tigris altaica)in Southern Russian Far East based on GPS telemetry data

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integrative Zoology 2015年第4期10卷 365-375页

作者： Jose A.HERNANdEZ-BLANCO Sergei V.NAidENKO Maria d.CHiSTOPOLOVA Victor S.LUKAREVSKiY Alexey kostyrya Alexandr RYBiN Pavel A.SOROKiN Mikhail N.LiTViNOV Andrey K.KOTLYAR dale G.MiQUELLE Viatcheslav V.ROZHNOV A.N.Severtsov institute of Ecology and Evolution Russian Academy of ScienceMoscowRussia V.L.Komarov Ussuriskii State Nature Reserve Far Eastern BranchRussian Academy of ScienceUssuriskRussia institute of Biology and Soil Sciences Far Eastern BranchRussian Academy of ScienceVladivostokRussia Wildlife Conservation Society VladivostokRussia

To better understand the spatial structure of Amur tigers(Panthera tigris altaica)at the southern edge of their range we fitted 14 tigers(6♀♀and 8♂♂)with 15 GPS-Argos collars between 2008 and 2011 in 2 study sites:the Ussuriskii Reserve of southern Sikhote-Alin and the Land of the Leopard National Park in southwest Primorye,Russian Far *** kernel estimates of male home ranges were larger than those of female home ranges(Pixed kernel♀=401±205 km2;mean 95%fixed kernel♂=778±267 km2]).The home range size of females varied greatly,but on average was similar to estimates derived from earlier work further *** overlap of adjacent home ranges suggested that females retained exclusive *** core areas of females overlapped only slightly,and remained stable over multiple *** home ranges of adult males were smaller than those of males to the north,and in contrast to previous studies,high overlap among males indicated the absence of ***,real core areas of males did not overlap,suggesting some spatial *** comparison to other tiger populations and other areas of the Russian Far East,the sex ratio in our 2 study areas was highly skewed towards *** believe this skewed sex ratio resulted in the dissolution of territoriality of males due to an inability to defend individual females,with males resorting to scramble competition for *** monitoring of these sites to determine whether shifts in the sex ratio might result in a return to male territoriality would provide confirmation of our tentative hypothesis.

关键词： Amur tiger GPS-Argos telemetry home range overlap Panthera tigris altaica space use social structure sex ratio

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