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Plasma Anisotropy Around an Infinite Chain of Dust Particles 尘埃粒子无限链周围的等离子体各向异性
2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE) Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242009
M. Salnikov, G. Sukhinin
{"title":"Plasma Anisotropy Around an Infinite Chain of Dust Particles","authors":"M. Salnikov, G. Sukhinin","doi":"10.1109/EFRE47760.2020.9242009","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242009","url":null,"abstract":"This paper presents a numerical model in which selfconsistent distributions of plasma space charge and potential are calculated in a proximity of the infinite chain consists of spherical dust particles. In the observed model, this chain is under an influence of an external electric field. The data obtained reveal a significant phenomenon: for the electric field of low intercity anisotropy around each individual dust particle raises lineary with the increase of external field strength. However, with further amplification of the external electric field this anisotropy start to decline, until it almost non-existent. Quantitatively this phenomenon is demonstrated through the dependency of the dipole moment of an “ion cloud – dust particle” system on the external electric field strength.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"177 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133716118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
About Some Features of the Vacuum Arc Operation with Boron-Containing Cathodes 关于含硼阴极真空电弧操作的一些特点
2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE) Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242127
V. Gushenets, E. Oks, A. Bugaev
{"title":"About Some Features of the Vacuum Arc Operation with Boron-Containing Cathodes","authors":"V. Gushenets, E. Oks, A. Bugaev","doi":"10.1109/EFRE47760.2020.9242127","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242127","url":null,"abstract":"The report presents an experimental studies of a pulsed vacuum arc discharge operation with pure boron and lanthanum hexaboride cathodes. For the experiments reported here, the arc discharge triggering was carried out due to breakdown on a ceramic button installed in the center of the cathode surface. Pure boron and LaB6 cathodes were tested. The pure boron cathode is a cast rod. The lanthanum hexaboride cathode is a hot pressed rod with small porosity (not more than 1%). Pure boron is a non-metallic element, but a semiconductor with a very high resistivity (2 MOhm×cm) under normal conditions, therefore for the stable discharge operation requires the cathode preheating up to high temperatures. A strong temperature dependence of resistivity and relatively low thermal conductivity lead to the fact that the cathode spot is localized in one place. Lanthanum hexaboride, although it is considered a refractory ceramic material, differs from pure boron in that it has a very low resistivity under normal conditions. Therefore, there is no need to preheat of the cathode for the arc discharge operation. Another difference is that LaB6 has a metallic type of conductivity and behavior of the cathode spots on the surface of the LaB6 cathode is similar to the behavior of the spots on a pure metal cathode. The vacuum arc with boron containing cathodes is accompanied by a large flow of hot droplets – macroparticles, as well as small cathode fragments.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115544093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Structure and Mechanical Characteristics of the Hypereutectic Silumin (Al–22–24 wt.% Si), Irradiated by a Pulsed Electron Beam 脉冲电子束辐照过共晶矽明(al - 22 - 24wt .% Si)的结构和力学特性
2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE) Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9241979
E. Petrikova, Y. Ivanov, M. Rygina, Alexander Prudnicov, A. Teresov, M. Vorobyov
{"title":"The Structure and Mechanical Characteristics of the Hypereutectic Silumin (Al–22–24 wt.% Si), Irradiated by a Pulsed Electron Beam","authors":"E. Petrikova, Y. Ivanov, M. Rygina, Alexander Prudnicov, A. Teresov, M. Vorobyov","doi":"10.1109/EFRE47760.2020.9241979","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9241979","url":null,"abstract":"Irradiation (“SOLO” setup, High-Current Electronics Institute SB RAS) of hypereutectic Al- (22–24) Si composition silumin samples with an intense pulsed electron beam was carried out. The formation of a multiphase submicron nanocrystalline structure is revealed. It was found that after modification, the hardness of silumin surface layer increases by more than 2 times. Tensile tests were carried out for flat proportional silumin samples in the initial and after irradiation states. An increase in the ductility of irradiated samples was demonstrated.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124571767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative Study of the Conditions for SiCN-Coatings Deposition in a Electron Beam Generated Plasma and in a Discharge with a Self-heated Hollow Cathode 电子束等离子体和自热空心阴极放电沉积sicn涂层条件的比较研究
2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE) Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242095
A. Menshakov
{"title":"Comparative Study of the Conditions for SiCN-Coatings Deposition in a Electron Beam Generated Plasma and in a Discharge with a Self-heated Hollow Cathode","authors":"A. Menshakov","doi":"10.1109/EFRE47760.2020.9242095","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242095","url":null,"abstract":"The composition of the hollow cathode arc discharge plasma and low-energy electron beam plasma in a gas medium containing hexamethyldisilazane (HMDS) vapors was studied and it was shown that the decomposition degree of HMDS molecules in a beam plasma is higher than in an discharge with a self-heated hollow cathode. SiCN-based coatings with a hardness of up to 18–20 GPA with a deposition rate of ~ 1µm/h at a temperature of 600°C were obtained. The composition of SiCN coatings was studied by IR spectroscopy, and it was shown that in the IR spectra of coatings obtained in a beam plasma, in contrast to deposition in an hollow cathode arc discharge, even in the low-temperature regime, the absorption peaks of the bonds of the initial HMDS molecules are rather low, including hydrogen-containing ones, which may also indicate a more intense decomposition of the precursor in the beam plasma and provides a higher microhardness of SiCN-coatings obtained in beam plasma at low temperatures (<200°C).","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114406181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Formation of Pulsed Low-Energy Electron Beam by a Plasma-Cathode Electron Source Based on Cathodic Arc in the Forevacuum Pressure Range 前真空压力范围内基于阴极电弧的等离子体阴极电子源形成脉冲低能电子束
2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE) Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242188
A. Kazakov, A. Medovnik, N. Panchenko, E. Oks
{"title":"Formation of Pulsed Low-Energy Electron Beam by a Plasma-Cathode Electron Source Based on Cathodic Arc in the Forevacuum Pressure Range","authors":"A. Kazakov, A. Medovnik, N. Panchenko, E. Oks","doi":"10.1109/EFRE47760.2020.9242188","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242188","url":null,"abstract":"The research of formation of pulsed large-radius low-energy (up to 10 keV) electron beam by a plasma-cathode electron source based on the cathodic arc in the forevacuum pressure range is presented. A hollow anode and a redistributing electrode have been used to generate broad, uniform emission plasma. Increase of the diameter of hollow anode and increase of diameter of emission aperture (window in the plane part of the anode covered by metal mesh) up to inner diameter of hollow anode has provided, as expected, an increase in efficiency of electron extraction from the arc plasma. However, increase of emission aperture has led to decrease maximal operating gas pressure due to intensification of the influence of back-streaming ion flow on the emission (arc) plasma. The use of two emission meshes with different cell sizes has provided generation electron beam with current of up to tens of amperes and pulse duration up to 5 ms at gas pressure of up to 15 Pa (N2). The maximal operating pressure and optimal efficiency of electron extraction from arc plasma (at low pressure) are provided in case of the first mesh with large cell sizes is mounted inside the hollow anode, and second fine mesh covers the emission window on side, facing the extractor (optimal distance between meshes is about 2 mm). The use of the redistributing electrode and two emission meshes provided an increase in the uniformity of the current density distribution across the electron beam.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116310720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Studying the Photocatalytic Activity of Iron Oxides Synthesized by Plasma Dynamic Method 等离子体动力学法制备氧化铁的光催化活性研究
2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE) Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242167
I. Shanenkov, A. Ivashutenko, A. Sivkov, Y. Vympina, Y. Shanenkova, A. Tsimmerman
{"title":"Studying the Photocatalytic Activity of Iron Oxides Synthesized by Plasma Dynamic Method","authors":"I. Shanenkov, A. Ivashutenko, A. Sivkov, Y. Vympina, Y. Shanenkova, A. Tsimmerman","doi":"10.1109/EFRE47760.2020.9242167","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242167","url":null,"abstract":"Photoelectrochemical water splitting is an actively developed area of hydrogen energy. It requires the use of highly-active photocatalysts, one of the most promising of which is a-Fe2O3 iron oxide. Among all iron oxides modifications, another phase f:-Fe2O3 can be potentially used as photocatalysts. However, this phase is difficult to be obtained by most of the known methods. In this work, the plasma dynamic synthesis method is used to obtain both of these phases to study their photocatalytic activity. For this, the synthesis system is improved to reach as highest yield of pointed phases as possible. The obtained nanosized powders with a predominant content of α- Fe2O3 and f:-Fe2O3 are studied with a three-electrode cell method. Both phases show the quite similar catalytic activity and a high stability.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123614174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mathematical Modeling of Mechanochemical Synthesis of Precursor Particles 前驱体颗粒机械化学合成的数学模型
2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE) Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9241995
O. Lapshin, A. Ryabkova
{"title":"Mathematical Modeling of Mechanochemical Synthesis of Precursor Particles","authors":"O. Lapshin, A. Ryabkova","doi":"10.1109/EFRE47760.2020.9241995","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9241995","url":null,"abstract":"A macroscopic mathematical model has been constructed for the mechanochemical synthesis of precursors in this work. The model comprises the equations of heat balance, which determines the temperature of the activated powder mixture in the volume of the mechanical activator; a chemical reaction, which describes a one-step reaction of the product formation from a mixture of two reagents; changes in the specific surface of mechanocomposite particles and the interface area, which take into account that the probability of its formation is proportional to the volume fractions of the reagents; dynamics of excess energy in the components of the powder mixture and the reaction product. The effect of physical and chemical parameters of the mixture components and the conditions of mechanical activation on the main synthesis characteristics such as the temperature, chemical conversion depth, the particle size of precursors, and their phase composition is studied in the work. The synthesis of precursors is shown to be the most effectively controlled by the following parameters, which vary in the experiment: the amount of inert diluent, mill power, the activation time, and the ambient temperature. The dynamics of synthesis is numerically investigated. In particular, it is shown that an increase in the amount of inert filler in the mixture and in the cooling rate of a high-energy mill as well as a decrease in the ambient temperature allow the mechanically activated system to switch to a controlled mode of mechanochemical synthesis, which contributes to the production of small-sized precursor powders.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117210116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
About the Role of Ozone in Air Purification From Vapors of Volatile Organic Compounds by Pulsed Discharges 臭氧在脉冲放电净化挥发性有机化合物蒸气中的作用
2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE) Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242070
I. Filatov, V. Uvarin, D. Kuznetsov
{"title":"About the Role of Ozone in Air Purification From Vapors of Volatile Organic Compounds by Pulsed Discharges","authors":"I. Filatov, V. Uvarin, D. Kuznetsov","doi":"10.1109/EFRE47760.2020.9242070","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242070","url":null,"abstract":"Air purification from vapors of volatile organic compounds by non-equilibrium plasma generated by discharges is always accompanied by the formation of ozone. Ozone is a highly toxic gas, so it is very important to know what part of it goes to destroy impurities, and which is in excess. Organic compounds have a wide variety of reactivity, so ozone reacts with them at different rates. Using the method of competing reactions by means of groups of model mixtures, the relative reactivity of compounds of different classes in relation to ozone was estimated. As an example, studies of the effect of a pulsed corona discharge with duration of 20–45 ns on air with admixtures of carbonyl, aromatic and unsaturated compounds are presented. It is shown that unsaturated compounds have the highest activity in relation to ozone. This research will be useful for the development of combined plasma-catalytic methods of air purification.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"10 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125987879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analyzer of Charged Particles Based on the Electrostatic Quadrupole-Cylindrical Field in the «Axis-Ring» Focusing Regime 基于静电四极柱场的“轴-环”聚焦区带电粒子分析仪
2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE) Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242088
Zh.T. Kambarova, A. Saulebekov
{"title":"Analyzer of Charged Particles Based on the Electrostatic Quadrupole-Cylindrical Field in the «Axis-Ring» Focusing Regime","authors":"Zh.T. Kambarova, A. Saulebekov","doi":"10.1109/EFRE47760.2020.9242088","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242088","url":null,"abstract":"The motion of charged particles in an electrostatic axially-symmetrical quadrupole-cylindrical field, formed by a superposition of electrostatic fields of a cylindrical mirror and a circular quadrupole, is studied. A numerical model of the energy analyzer based on quadrupole-cylindrical field is obtained. The second-order angular focusing of “axis-ring” type is found. The focusing properties of the quadrupole-cylindrical mirror energy analyzer are determined by numerical methods for calculation particle motion trajectories.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124703835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Nanosecond Microwave Pulse Compressor 纳秒微波脉冲压缩机
2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE) Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242019
A. Nikiforov, P. Chumerin
{"title":"Nanosecond Microwave Pulse Compressor","authors":"A. Nikiforov, P. Chumerin","doi":"10.1109/EFRE47760.2020.9242019","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242019","url":null,"abstract":"This paper presents the results of the development, design and study of a nanosecond microwave pulse former for nonlinear radar. The device contains a microwave generator, a coaxial storage resonator and a semiconductor switch, consisting of a toroidal resonator with P-I-N diodes located inside. This microwave pulse former of nanosecond duration has the parameters: peak power 2.09 kW, pulse duration at −3 dB level 5 ns, pulse repetition rate 250 Hz, carrier frequency 848 MHz.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124883957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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