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Discharge Stabilization and Obtaining of Quasi-Stationary Electron Beams in Explosive-Emission Sources

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Journal of Energy and Power Engineering 2012年第8期6卷 1363-1368页

作者： Eduard N. Abdullin gennady P. Bazhenov Alexander V. Morozov Microwave Electronics Laboratory Institute of High Current Electronics SB RAS Tomsk 634055 Russia

Quasistationary discharge mode setting in the explosive-emission sources is related to the saturation of the cathode plasma emissive ability resulting in the decrease of the velocity of plasma propagation into the interelectrode gap. It was shoran previously that the electron beam space charge providing the current rise slowing-down is of great importance in the process of the discharge mode stabilization. The paper considers a possibility of the discharge protraction at the expense of decrease of the ion charge order in the plasma composition and application of the directed plasma flows. The data concerning obtainig of micro- and millisecond electron beams in the explosive-emission sources are presented as well.

关键词： Explosive-emission electron source quasi-stationary discharge electron beams.

Graphene/MoS_(2-x)O_(x)/graphene photomemristor with tunable non-volatile responsivities for neuromorphic vision processing

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Light(Science & Applications) 2023年第2期12卷 284-293页

作者： Xiao Fu Tangxin Li Bin Cai Jinshui Miao gennady NPanin Xinyu Ma jinjin Wang Xiaoyong Jiang Qing Li yi Dong Chunhui Hao Juyi Sun Hangyu Xu Qixiao Zhao Mengjia Xia Bo Song Fansheng Chen Xiaoshuang Chen Wei Lu Weida Hu School of Physics and Optoelectronic Engineering Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China University of Chinese Academy of Sciences 100049 BeijingChina Institute of Intelligent Machines HFiPSChinese Academy of SciencesHefei 230031China Jianghuai Frontier Technology Coordination and Innovation Center Hefei 230088China Institute of Microelectronics Technology and High-Purity Materials Russian Academy of SciencesChernogolovkaMoscow district142432Russia

Conventional artificial intelligence(Al)machine vision technology,based on the von Neumann architecture,uses separate sensing,computing,and storage units to process huge amounts of vision data generated in sensory *** frequent movement of redundant data between sensors,processors and memory,however,results in high-power consumption and latency.A more efficient approach is to offload some of the memory and computational tasks to sensor elements that can perceive and process the optical signal ***,we proposed a non-volatile photomemristor,in which the reconfigurable responsivity can be modulated by the charge and/or photon flux through it and further stored in the *** non-volatile photomemristor has a simple two-terminal architecture,in which photoexcited carriers and oxygen-related ions are coupled,leading to a displaced and pinched hysteresis in the current-voltage *** the frst time,non-volatile photomemristors implement computationally complete logic with photoresponse-stateful operations,for which the same photomemristor serves as both a logic gate and memory,using photoresponse as a physical state variable instead of light,voltage and *** polarity reversal of photomemristors shows great potential for in-memory sensing and computing with feature extraction and image recognition for neuromorphic vision.

关键词： tunable operations hysteresis

烧蚀对强脉冲离子束在高分子材料中能量沉积的影响

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物理学报 2020年第11期69卷 146-151页

作者：张世健喻晓钟昊玟梁国营许莫非张楠任建慧匡仕成颜莎 gennady Efimovich Remnev 乐小云北京航空航天大学物理学院北京100191 北京航空航天大学大数据精准医疗高精尖创新中心北京100191 北京航空航天大学先进核能材料与物理北京市重点实验室北京100191 托木斯克理工大学托木斯克634050俄罗斯北京大学重离子物理研究所北京100871

高能量密度纳秒量级强脉冲离子束辐照材料表面的烧蚀产物和束流的相互作用,可能对束流在靶中的能量沉积产生影响,进而影响烧蚀情况下的束流分析和相关应用的优化.本文采用红外成像方法对横截面能量密度1.5-1.8 J/cm^2的强脉冲离子束在30... 详细信息

高能量密度纳秒量级强脉冲离子束辐照材料表面的烧蚀产物和束流的相互作用,可能对束流在靶中的能量沉积产生影响,进而影响烧蚀情况下的束流分析和相关应用的优化.本文采用红外成像方法对横截面能量密度1.5-1.8 J/cm^2的强脉冲离子束在304不锈钢和高分子材料上的能量沉积进行了测量分析.结果表明在高分子材料上,在超过一定能量密度后,束流引发材料表面烧蚀产物的屏蔽效应使得大部分束流能量不能沉积在靶上.采用有限元方法对束流引发的温度场分布进行了计算,验证了高分子材料的低热导率以及低分解温度使其在脉冲辐照早期即开始热解,烧蚀产物对后续束流能量的进一步沉积产生屏蔽.此类效应在金属上存在的可能性和对束流诊断等应用的影响,亦进行了讨论.

关键词：强脉冲离子束烧蚀能量沉积屏蔽

Mixed hetero-/homogeneous TiO_(2)/N-hydroxyimide photocatalysis in visible-light-induced controllable benzylic oxidation by molecular oxygen

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Chinese Journal of Catalysis 2021年第10期42卷 1700-1711页

作者： Igor B.Krylov Elena R.Lopat'eva Irina R.Subbotina gennady I.Nikishin Bing yu Alexander O.Terent'ev N.D.zelinsky institute of organic chemistry of the russian academy of sciences moscow 119991russian federation Mendeleev university of chemical technology of russia moscow 125047russian federation Green catalysis center college of chemistryzhengzhou universityzhengzhou 450001henanchina

Homogeneous and heterogeneous types of catalysis are frequently considered as separate disciplines or even opposed to each *** the present work,a new type of mixed het-ero-/homogeneous catalysis was demonstrated for the case of selective alkylarene oxidation by molecular *** proposed catalytic system consists of two widely available components:N-hydroxyphthalimide(NHPI,a homogeneous organocatalyst for free-radical chain reactions)and nanosized TiO_(2)(heterogeneous UV-active photoredox catalyst).The interaction of NHPI with TiO_(2) allows for a shift from UV to visible light photoredox activity and generation of phthalimide-N-oxyl(PINO)radicals that diffuse into the solution where NHPI/PINO-catalyzed free-radical chain reaction can proceed without the additional light input providing a fundamental increase in energy *** NHPI/TiO_(2) ratio controls the selectivity of oxidation affording preferential formation of hydroperoxide or ketone from alkylarene.

关键词： TiO_(2) Photoredox catalysis N-hydroxyphthalimide N-oxyl radicals Aerobic oxidation

Bright Betatronlike X Rays from Radiation Pressure Acceleration of a Mass-Limited Foil Target

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Bright Betatronlike X Rays from Radiation Pressure Accelerat...

Features of Usage of Electromagnetic Field of Extremely Low Frequency for the Storage of Agricultural Products

第七届全国青年计算物理学术会议

作者：余同普 Alexander Pukhov 盛政明刘峰 gennady Shvets Department of Physics National University of Defense Technology State Key Laboratory of High Performance Computing National University of Defense Technology Institut für Theoretische Physik I Heinrich-Heine-Universitt Düsseldorf Institut für Theoretische Physik I Heinrich-Heine-Universitt Düsseldorf Key Laboratory for Laser Plasmas(MoE) and Department of Physics Shanghai Jiao Tong University Institut für Laser-und Plasmaphysik Heinrich-Heine-Universitt Düsseldorf Department of Physics The University of Texas at Austin

By using multidimensional particle-in-cell simulations, we study the electromagnetic emission from radiation pressure acceleration of ultrathin mass-limited foils. When a circularly polarized laser pulse irradiates the foil, the laser radiation pressure pushes the foil forward as a whole. The outer wings of the pulse continue to propagate and act as a natural undulator. Electrons move together with ions longitudinally but oscillate around the latter transversely, forming a self-organized helical electron bunch. When the electron oscillation frequency coincides with the laser frequency as witnessed by the electron,betatronlike resonance occurs. The emitted x rays by the resonant electrons have high brightness, short durations, and broad band ranges which may have diverse applications.

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Journal of Electromagnetic Analysis and Applications 2013年第5期5卷 236-241页

作者： Kasyanov gennady Ivanovich Syazin Ivan Evgenyevich Grachev Alexandr Vasilyevich Davidenko Taisiya Nikolaevna Vazhenin Evgeniy Igorevich Meat and Fish Products Department FSBEI HPE Kuban State Technological University Krasnodar Russia Phylology Department FSBEI HPE Kuban State Technological University Krasnodar Russia.

The way of increase of storage period of agricultural raw materials under the influence of low frequency electromagnetic field (EMF LF) has been considered in the article. Existing developments of the EMF LF usage on the base of patents have been examined. The results of EMF LF processing of wood, wine, seeds, vegetative, fish and meat products have been presented.

关键词： Agricultural Raw Materials Electromagnetic Processing Low Frequencies Storage Drying

Attenuation correction technique for fluorescence analysis of biological tissues with significantly different optical properties

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Frontiers of Optoelectronics 2020年第4期13卷 360-370页

作者： Tatiana A.SAVELIEVA Marina N.KURyANOVA Ekaterina V.AKHLyUSTINA Kirill G.LINKOV gennady A.MEEROVICH Victor B.LOSCHENOV Prokhorov General Physics Institute of the Russian Academy of Sciences Moscow 119991Russia National Research Nuclear University MEPhl Moscow 115409Russia

During intraoperative fluorescence navigation to remove various neoplasms and during pharmacokinetic studies of photosensitizers in laboratory animals,in many cases,the ratio of photosensitizer accumulation in the tumor and normal tissue can reach>10-fold,which inevitably changes their optical *** the same time,the tumor formation process causes various metabolic and structural changes at cellular and tissue levels,which lead to changes in optical properties.A hardwaresoftware complex for the spectral-fluorescence studies of the content of fluorochromes in biological tissues with significantly different optical properties was developed,and it was tested on optical phantoms with various concentrations of photosensitizers,absorbers,and *** correct the influence of optical properties on the photosensitizer concentration analysis by fluorescence spectroscopy,we propose the spectrum-processing algorithm,which combines empirical and theory-based approaches.

关键词： fluorescence spectroscopy scattering absorption attenuation correction optical phantoms

Formation of a Quasi-Stationary Discharge in the Explosive-Emission Electron Sources

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Journal of Energy and Power Engineering 2012年第7期6卷 1177-1182页

作者： Eduard N. Abdullin gennady P. Bazhenov yury P. Bazhenov Alexander V. Morozov Microwave Electronics Laboratory Institute of High Current Electronics SB RAS Tomsk 634055 Russia

Formation of a quasi-stationary discharge or quasi-stationary emission mode in the explosive-emission electron sources is related to the current limitation resulting from the emissive ability saturation of cathode plasma with its expansion. The paper shows that in the process of the discharge current stabilization in the explosive-emission sources with the point- or blade-type emitters the essential role belongs to the electron beam space charge. Availability of the space charge results in limitation of the current growth velocity at the initial discharge phase and, hence, restricts the emissive ability of the cathode plasma and contributes to its saturation. In the vacuum diodes with multiemitter cathodes, the space charge availability increases the cathode operation stability and can provide obtaining of quasi-stationary beam current values or close to them resulting in formation of a plasma emission surface at the cathode close to the continuous one.

关键词： Explosive-emission electron source point- and blade-type emitters space charge of the beam quasi-stationary mode.

Application of Coulometric Titration for the Certification of Primary Reference Materials of Pure Substances

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American Journal of Analytical Chemistry 2014年第9期5卷 559-565页

作者： gennady I. Terentiev Alena V. Sobina Alexandr J. Shimolin Veniamin M. Zyskin Ural Scientific and Research Institute for Metrology Ekaterinburg Russia

In this article, the block scheme and metrological characteristics of the State primary standard of the mass (molar) fraction and mass (molar) concentration of the component in the liquid and solid substances and materials based on coulometric titration GET 176-2010 are given. Primary reference materials certified by coulometric titration in the Ural Scientific and Research Institute for Metrology include eight certified reference materials (CRMs) of pure solid substances (mostly salts of sodium or potassium) and one hydrochloric acid solution CRM. The metrological characteristics of these reference materials and the scheme of their application in titrimetric analysis are shown. The expanded uncertainty of the certified value (mass fraction for the solid substances or molar concentration for the solution) is in the range from 0.018% to 0.05%. Information about two primary reference materials of high purity iron and lead nitrate certified by controlled-potential coulometry with expanded uncertainty from 0.04% to 0.07% is also given.

关键词： Coulometric Titration Controlled-Potential Coulometry Primary Reference Materials High Purity Substances State Primary Standard