首页 > 最新文献

2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)最新文献

英文 中文
Application of a Plasma Anode in the Electron Beam Source with an Explosive Emission Cathode and Electron Beam Output into the Atmosphere 等离子体阳极在具有爆炸发射阴极和向大气输出电子束的电子束源中的应用
Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242157
E. Abdullin, G. Basov
The results of experiments on the generation of high-power microsecond electron beams in an electron beam source with an explosive-emission cathode, a plasma anode, and output of an electron beam through a foil window into the atmosphere are presented. The beam is formed and transported in the presence of a longitudinal magnetic field. The power source is a Marx generator with matched loads and with a rectangular waveform of the output voltage pulse. At an accelerating voltage of 200–220 kV, in an electron beam source, the electron beams with a current of up to 2.5–3 kA, a cross section of 100–200 cm2, and a duration of 5 µs are obtained without ignition of the arc discharge in the interelectrode gap. The possibility to realize operation modes of an electron beam source without beam rotation is demonstrated. The energy released on the beam collector with a receiving surface area of 74 cm2, located in the electron source behind the anode, is up to ~ 600–700 J/pulse. The beam energy extracted outside of the foil is registered with calorimeters and equals to ~ 250–270 J/pulse.
本文介绍了在具有爆炸发射阴极和等离子体阳极的电子束源中产生高功率微秒电子束的实验结果,以及电子束通过箔窗输出到大气中的实验结果。光束在纵向磁场的存在下形成和传输。电源为马克思发电机,负载匹配,输出电压脉冲为矩形波形。在200-220 kV加速电压下,在电子束源中,在不点燃电极间隙电弧放电的情况下,获得了电流为2.5-3 kA、截面为100-200 cm2、持续时间为5µs的电子束。论证了电子束源在不旋转的情况下实现工作模式的可能性。在阳极后的电子源处,接收面积为74 cm2的束流收集器上释放的能量可达~ 600 ~ 700 J/脉冲。从箔外提取的光束能量用量热计记录,等于~ 250-270 J/脉冲。
{"title":"Application of a Plasma Anode in the Electron Beam Source with an Explosive Emission Cathode and Electron Beam Output into the Atmosphere","authors":"E. Abdullin, G. Basov","doi":"10.1109/EFRE47760.2020.9242157","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242157","url":null,"abstract":"The results of experiments on the generation of high-power microsecond electron beams in an electron beam source with an explosive-emission cathode, a plasma anode, and output of an electron beam through a foil window into the atmosphere are presented. The beam is formed and transported in the presence of a longitudinal magnetic field. The power source is a Marx generator with matched loads and with a rectangular waveform of the output voltage pulse. At an accelerating voltage of 200–220 kV, in an electron beam source, the electron beams with a current of up to 2.5–3 kA, a cross section of 100–200 cm2, and a duration of 5 µs are obtained without ignition of the arc discharge in the interelectrode gap. The possibility to realize operation modes of an electron beam source without beam rotation is demonstrated. The energy released on the beam collector with a receiving surface area of 74 cm2, located in the electron source behind the anode, is up to ~ 600–700 J/pulse. The beam energy extracted outside of the foil is registered with calorimeters and equals to ~ 250–270 J/pulse.","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":"130808467","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
Velocity Distribution Around an Isolated Dust Particle 孤立尘埃粒子周围的速度分布
Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242052
M. Salnikov, G. Sukhinin
This paper presents a numerical model in which selfconsistent distributions of plasma space charge, ion velocity and potential are calculated in the proximity of an isolated spherical dust particle. In the presented model this dust particle is under the influence of an external electric field. As a result of calculation spatial distribution of ions radial velocity around the isolated dust particles is obtained, as well as the ion velocity distribution function along an axis aligned with the vector of the external electric field. The obtained results make it possible to establish the intervals of parameters (i.e., the electric field strength, the ion mean free path, and the distance between the ion and the dust particle) within the boundaries of which the approximation that the ion velocity distribution function coincides with the shifted Maxwell distribution is correct.
本文提出了一个计算等离子体空间电荷、离子速度和电势在孤立球形尘埃粒子附近自洽分布的数值模型。在所提出的模型中,这种尘埃粒子受到外电场的影响。计算结果得到了离子在被隔离尘埃粒子周围径向速度的空间分布,以及沿与外电场矢量对齐的轴方向的离子速度分布函数。得到的结果可以建立参数(即电场强度、离子平均自由程和离子与尘埃粒子之间的距离)的区间,在该区间内离子速度分布函数与移位的麦克斯韦分布重合的近似是正确的。
{"title":"Velocity Distribution Around an Isolated Dust Particle","authors":"M. Salnikov, G. Sukhinin","doi":"10.1109/EFRE47760.2020.9242052","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242052","url":null,"abstract":"This paper presents a numerical model in which selfconsistent distributions of plasma space charge, ion velocity and potential are calculated in the proximity of an isolated spherical dust particle. In the presented model this dust particle is under the influence of an external electric field. As a result of calculation spatial distribution of ions radial velocity around the isolated dust particles is obtained, as well as the ion velocity distribution function along an axis aligned with the vector of the external electric field. The obtained results make it possible to establish the intervals of parameters (i.e., the electric field strength, the ion mean free path, and the distance between the ion and the dust particle) within the boundaries of which the approximation that the ion velocity distribution function coincides with the shifted Maxwell distribution is correct.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"1 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":"131006606","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
Nitriding of Mechanically Pre-Activated Ferrochromaluminium in the Combustion Mode 燃烧模式下机械预活化铬铁渗氮的研究
Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9241896
A. Reger, K. Bolgaru
Nitriding of complex ferroalloy (ferrochromaluminium) by the method of self-propagating high-temperature synthesis with mechanical pre-activation of initial ferroalloy powder is presented in the paper. The combustion behavior of activated ferroalloy powder are revealed, the limits of the combustion of ferrochromaluminium powder are determined, and the combustion behavior and limits of the combustion reaction of unactivated and mechanically pre-activated ferroalloy powders are compared.
采用机械预活化初始铁合金粉末的自蔓延高温合成方法对复合铁合金(铁铬)进行了氮化处理。揭示了活化铁合金粉末的燃烧行为,确定了铬铁粉的燃烧极限,并比较了未活化和机械预活化铁合金粉末的燃烧行为和燃烧反应极限。
{"title":"Nitriding of Mechanically Pre-Activated Ferrochromaluminium in the Combustion Mode","authors":"A. Reger, K. Bolgaru","doi":"10.1109/EFRE47760.2020.9241896","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9241896","url":null,"abstract":"Nitriding of complex ferroalloy (ferrochromaluminium) by the method of self-propagating high-temperature synthesis with mechanical pre-activation of initial ferroalloy powder is presented in the paper. The combustion behavior of activated ferroalloy powder are revealed, the limits of the combustion of ferrochromaluminium powder are determined, and the combustion behavior and limits of the combustion reaction of unactivated and mechanically pre-activated ferroalloy powders are compared.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"47 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":"126049172","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
Ranking of LMFR Coolants by Degree of Preference lfr冷却剂按偏好程度排序
Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242025
V. Okunev
A new approach to ranking the coolants of a liquid metal fast reactor (LMFR) by degree of preference is proposed and implemented. The approach involves comparing the optimal LMFR layouts with different coolants and compatible structural materials. The layouts were obtained in solving mathematical programming problems with restrictions in the same formulation. The problem is solved in three stages. At the first stage, on the basis of an elementary analysis of the physicochemical properties and cost, unacceptable metals with a high cost (rare metals), a small wide range of operating temperatures, a low boiling point, and high induced activity were excluded. The second stage involves obtaining the optimal layout of LMFR with different coolants. Then, using lexicographic methods for solving multicriteria problems, a coolant ranking procedure is carried out based on a comparison of the optimal LMFR layouts. The third stage involves the analysis of preferred options. Depending on the power and purpose of the reactor, the most preferred coolants are different. For medium and high power reactors, lead extracted from thorium ores is most preferred. For low power reactors, lead from polymetallic and lead ores is preferred. In such reactors, the use of lead of uranium ores is possible. For high- and very-high-temperature low power reactors, gallium and its alloys, including gallium-lead alloys, are preferred. For space reactors, a coolant based on the eutectic Na-K-Cs alloy is more preferred.
提出并实现了一种按优先度对液态金属快堆冷却剂进行排序的新方法。该方法包括比较不同冷却剂和兼容结构材料的最佳LMFR布局。通过求解具有约束条件的数学规划问题,得到了平面布局。这个问题分三个阶段解决。在第一阶段,在对理化性质和成本进行初步分析的基础上,排除了成本高、工作温度范围小、沸点低、诱导活性高的不可接受金属(稀有金属)。第二阶段是获得不同冷却剂下LMFR的最佳布局。然后,利用词典法求解多准则问题,在比较最优LMFR布局的基础上,对冷却剂进行排序。第三阶段涉及对首选方案的分析。根据反应堆的功率和用途,最优选的冷却剂是不同的。对于中大功率反应堆,从钍矿石中提取铅是首选。对于低功率反应堆,首选来自多金属和铅矿的铅。在这种反应堆中,可以使用铀矿石中的铅。对于高温和极高温低功率反应堆,镓及其合金,包括镓铅合金,是首选。对于太空反应堆,基于共晶Na-K-Cs合金的冷却剂是更优选的。
{"title":"Ranking of LMFR Coolants by Degree of Preference","authors":"V. Okunev","doi":"10.1109/EFRE47760.2020.9242025","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242025","url":null,"abstract":"A new approach to ranking the coolants of a liquid metal fast reactor (LMFR) by degree of preference is proposed and implemented. The approach involves comparing the optimal LMFR layouts with different coolants and compatible structural materials. The layouts were obtained in solving mathematical programming problems with restrictions in the same formulation. The problem is solved in three stages. At the first stage, on the basis of an elementary analysis of the physicochemical properties and cost, unacceptable metals with a high cost (rare metals), a small wide range of operating temperatures, a low boiling point, and high induced activity were excluded. The second stage involves obtaining the optimal layout of LMFR with different coolants. Then, using lexicographic methods for solving multicriteria problems, a coolant ranking procedure is carried out based on a comparison of the optimal LMFR layouts. The third stage involves the analysis of preferred options. Depending on the power and purpose of the reactor, the most preferred coolants are different. For medium and high power reactors, lead extracted from thorium ores is most preferred. For low power reactors, lead from polymetallic and lead ores is preferred. In such reactors, the use of lead of uranium ores is possible. For high- and very-high-temperature low power reactors, gallium and its alloys, including gallium-lead alloys, are preferred. For space reactors, a coolant based on the eutectic Na-K-Cs alloy is more preferred.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"6 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":"127432244","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
Calculation Characteristics of the Electron Beam Injected into the Plasma of the Open Magnetic Trap GDT 开放式磁阱GDT等离子体注入电子束的计算特性
Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242080
V. Astrelin, E. Soldatkina, P. Bagryansky, Dmitry Scovorodin
In the Institute of Nuclear Physics, SB RAS, experiments are carried out on injection of electron beam into open magnetic trap GDT. The trap is a mirror cell with a large mirror ratio filled with deuterium plasma with subthermonuclear parameters. Two expanders are attached to both sides of the trap. There are volumes with a diverging magnetic field, used to reduce longitudinal losses from the trap. The source of the electron beam is located in the expander, in the region of a weak magnetic field and is exposed to a supersonic plasma ion stream emerging from the trap. The source of a diode-type operates with a thermionic cathode and a hollow metal anode. The plasma from the trap enters the diode through the anode liner and stops by the potential of the cathode, forming an anode electrode. Its surface and the metal surfaces of the electrodes determine the electron-optical characteristics of the diode and the beam formed in it. The paper presents the results of two-dimensional numerical simulation of the beam source and calculated electron beam angular characteristics. The numerical model uses the plasma flow parameters measured in the experiment and results of solving the one-dimensional Poisson equation for the Debye layer on the surface of the anode plasma.
在SB - RAS核物理研究所进行了电子束注入开放式磁阱GDT的实验。陷阱是一个大镜像比的镜像细胞,充满了具有亚热核参数的氘等离子体。两个膨胀器连接在疏水阀的两侧。有分散磁场的体积,用于减少陷阱的纵向损失。电子束的来源位于膨胀器中,在弱磁场的区域,并暴露于从陷阱中出现的超音速等离子体离子流。二极管型的源与热离子阴极和空心金属阳极一起工作。来自陷阱的等离子体通过阳极衬里进入二极管,并在阴极的电位处停止,形成阳极电极。它的表面和电极的金属表面决定了二极管和其中形成的光束的电子光学特性。本文给出了电子束源的二维数值模拟结果和计算出的电子束角特性。数值模型采用实验测量的等离子体流动参数和阳极等离子体表面德拜层一维泊松方程的求解结果。
{"title":"Calculation Characteristics of the Electron Beam Injected into the Plasma of the Open Magnetic Trap GDT","authors":"V. Astrelin, E. Soldatkina, P. Bagryansky, Dmitry Scovorodin","doi":"10.1109/EFRE47760.2020.9242080","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242080","url":null,"abstract":"In the Institute of Nuclear Physics, SB RAS, experiments are carried out on injection of electron beam into open magnetic trap GDT. The trap is a mirror cell with a large mirror ratio filled with deuterium plasma with subthermonuclear parameters. Two expanders are attached to both sides of the trap. There are volumes with a diverging magnetic field, used to reduce longitudinal losses from the trap. The source of the electron beam is located in the expander, in the region of a weak magnetic field and is exposed to a supersonic plasma ion stream emerging from the trap. The source of a diode-type operates with a thermionic cathode and a hollow metal anode. The plasma from the trap enters the diode through the anode liner and stops by the potential of the cathode, forming an anode electrode. Its surface and the metal surfaces of the electrodes determine the electron-optical characteristics of the diode and the beam formed in it. The paper presents the results of two-dimensional numerical simulation of the beam source and calculated electron beam angular characteristics. The numerical model uses the plasma flow parameters measured in the experiment and results of solving the one-dimensional Poisson equation for the Debye layer on the surface of the anode plasma.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"4 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":"127095665","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
Large-Scale Instabilities in Strong, Fast Rising Magnetic Fields 强快速上升磁场中的大尺度不稳定性
Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242087
N. Labetskaya, I. Datsko, Vladimir I. Oreshkin, D. Rybka, S. Chaikovsky, V. Van'kevich
Experiments on the MIG high-current generator at a current of ~ 2 MA with a rise time of 100 ns were performed to study the explosion of cylindrical copper conductors of diameter 2 mm in a magnetic field of up 400 T. Plasma jets propagating in the radial direction with a velocity of ~ 7·105 cm/s were recorded on the surface of a conductor. A possible reason for the appearance of such plasma structure is the development of flute instabilities.
在MIG大电流发生器上进行了~ 2 MA、上升时间为100 ns的实验,研究了直径为2 mm的圆柱形铜导体在高达400 t的磁场下的爆炸,在导体表面记录到了以~ 7·105 cm/s的速度沿径向传播的等离子射流。出现这种等离子体结构的一个可能原因是笛子不稳定性的发展。
{"title":"Large-Scale Instabilities in Strong, Fast Rising Magnetic Fields","authors":"N. Labetskaya, I. Datsko, Vladimir I. Oreshkin, D. Rybka, S. Chaikovsky, V. Van'kevich","doi":"10.1109/EFRE47760.2020.9242087","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242087","url":null,"abstract":"Experiments on the MIG high-current generator at a current of ~ 2 MA with a rise time of 100 ns were performed to study the explosion of cylindrical copper conductors of diameter 2 mm in a magnetic field of up 400 T. Plasma jets propagating in the radial direction with a velocity of ~ 7·105 cm/s were recorded on the surface of a conductor. A possible reason for the appearance of such plasma structure is the development of flute instabilities.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"52 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":"126491594","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
Analysis of Structure and Microhardness AlSi5Cu2 and AlSi10Cu2 Cast Alloys Subjected to Electron Beam Surface Melting 电子束表面熔化AlSi5Cu2和AlSi10Cu2铸造合金的组织和显微硬度分析
Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242140
D. Zaguliaev, Ilya Chumachkov, Y. Ivanov, A. Abaturova, A. Ustinov, A. Semin
The research deals with the modification of AlSi5Cu2and AlSi10Cu2 alloy surfaces by the method of electron beam processing. It is established that the irradiation of the alloys by concentrated energy flow is accompanied by the increase in microhardness and covering the surface defects. Due to a great temperature difference between two media the surface melts at a superhigh rate and crystallizes again, because of it a grain size decreases resulting in the increase in microhardness. The arising tensile stresses contribute to the covering of the surface defects.
研究了用电子束法对alsi5cu2和AlSi10Cu2合金表面进行改性的方法。结果表明,在集中能量流辐照下,合金的显微硬度增加,表面缺陷被覆盖。由于两种介质之间的巨大温差,表面以超高的速度熔化并再次结晶,因此晶粒尺寸减小,导致显微硬度增加。产生的拉伸应力有助于表面缺陷的覆盖。
{"title":"Analysis of Structure and Microhardness AlSi5Cu2 and AlSi10Cu2 Cast Alloys Subjected to Electron Beam Surface Melting","authors":"D. Zaguliaev, Ilya Chumachkov, Y. Ivanov, A. Abaturova, A. Ustinov, A. Semin","doi":"10.1109/EFRE47760.2020.9242140","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242140","url":null,"abstract":"The research deals with the modification of AlSi5Cu2and AlSi10Cu2 alloy surfaces by the method of electron beam processing. It is established that the irradiation of the alloys by concentrated energy flow is accompanied by the increase in microhardness and covering the surface defects. Due to a great temperature difference between two media the surface melts at a superhigh rate and crystallizes again, because of it a grain size decreases resulting in the increase in microhardness. The arising tensile stresses contribute to the covering of the surface defects.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"299 1 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":"133993967","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
Higher Harmonics in the Output Spectrum of Microwave Sources Based on Nonlaminar Electron Beams (Analysis of the Effect of Transverse and Longitudinal Bunches of the Space Charge) 基于非层流电子束的微波源输出谱中的高次谐波(空间电荷横向束和纵向束影响的分析)
Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242085
Y. Kalinin, A. Starodubov
Nowadays one of the actual problems of modern vacuum electronic devices is moving the operating frequencies towards the millimeter-wave and THz regime. Operation at the n-th harmonic could be one of the possible and well-known approaches to increase the operating frequency of vacuum electronic devices. Devices based on the nonlaminar electron beams (vircator-type devices) employ an intrinsic complicated dynamics of the electron beam and may serve as compact microwave sources owing to the simplicity of design and simple tunability of working regimes. In this work, we study the dependence of higher harmonics excitations on the transverse and longitudinal distribution of current density in nonlaminar electron beams. We have considered two types of spatial form of space charge bunches: solid and hollow (quasi-hollow). Fourier-analysis of these spatial forms of electrons bunches has shown that the hollow (quasi-hollow) form is most suitable for higher harmonics excitation. We have also revealed several factors that exert influence on the spatial form of electrons bunches: a considerable amount of electron velocity scatter, a convergence of electron beam, the presence of reflected electrons in the electron beam, a magnitude of the periodic magnetic field. Experimental studies were carried out with the help of a demountable vacuum setup. Experimental studies have shown that there was an excitation of 15-th harmonic (the main frequency was near the 1 GHz) in the case of hollow (quasi-hollow) electron bunches. We have formulated several recommendations for the excitation of higher harmonics in vacuum electronic devices based on the nonrelativistic nonlaminar electron beams.
目前,现代真空电子器件的实际问题之一是工作频率向毫米波和太赫兹频段移动。在n次谐波下工作可能是提高真空电子器件工作频率的一种可能和众所周知的方法。基于非层流电子束的器件(virator -type Devices)利用了电子束固有的复杂动力学特性,由于设计简单、工作机制易于调节,可以作为紧凑的微波源。本文研究了高次激励对非层流电子束中电流密度横向和纵向分布的依赖关系。我们考虑了两种类型的空间电荷束的空间形式:固体和空心(准空心)。这些空间形式的电子束的傅里叶分析表明,空心(准空心)形式最适合于高次激发。我们还揭示了影响电子束空间形态的几个因素:相当数量的电子速度散射、电子束的会聚、电子束中反射电子的存在、周期性磁场的大小。实验研究是在可拆卸真空装置的帮助下进行的。实验研究表明,在空心(准空心)电子束中存在15次谐波激发(主频率在1ghz附近)。在非相对论性非层流电子束的基础上,提出了几种激发真空电子器件中高次谐波的建议。
{"title":"Higher Harmonics in the Output Spectrum of Microwave Sources Based on Nonlaminar Electron Beams (Analysis of the Effect of Transverse and Longitudinal Bunches of the Space Charge)","authors":"Y. Kalinin, A. Starodubov","doi":"10.1109/EFRE47760.2020.9242085","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242085","url":null,"abstract":"Nowadays one of the actual problems of modern vacuum electronic devices is moving the operating frequencies towards the millimeter-wave and THz regime. Operation at the n-th harmonic could be one of the possible and well-known approaches to increase the operating frequency of vacuum electronic devices. Devices based on the nonlaminar electron beams (vircator-type devices) employ an intrinsic complicated dynamics of the electron beam and may serve as compact microwave sources owing to the simplicity of design and simple tunability of working regimes. In this work, we study the dependence of higher harmonics excitations on the transverse and longitudinal distribution of current density in nonlaminar electron beams. We have considered two types of spatial form of space charge bunches: solid and hollow (quasi-hollow). Fourier-analysis of these spatial forms of electrons bunches has shown that the hollow (quasi-hollow) form is most suitable for higher harmonics excitation. We have also revealed several factors that exert influence on the spatial form of electrons bunches: a considerable amount of electron velocity scatter, a convergence of electron beam, the presence of reflected electrons in the electron beam, a magnitude of the periodic magnetic field. Experimental studies were carried out with the help of a demountable vacuum setup. Experimental studies have shown that there was an excitation of 15-th harmonic (the main frequency was near the 1 GHz) in the case of hollow (quasi-hollow) electron bunches. We have formulated several recommendations for the excitation of higher harmonics in vacuum electronic devices based on the nonrelativistic nonlaminar electron beams.","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":"114027881","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
Copyright 版权
Pub Date : 2020-09-14 DOI: 10.1109/efre47760.2020.9241949
{"title":"Copyright","authors":"","doi":"10.1109/efre47760.2020.9241949","DOIUrl":"https://doi.org/10.1109/efre47760.2020.9241949","url":null,"abstract":"","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"167 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":"121033138","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
Development of a Mirror Energy Analyzer of Charged Particles Beams Based on a Modified Electrostatic Field 基于修正静电场的带电粒子束镜像能量分析仪的研制
Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242029
Zh.T. Kambarova, A. Saulebekov
The plane-symmetrical electrostatic energy analyzer of charged particle beams based on a modified field is proposed. The optimal electron-optical scheme of the energy analyzer is determined. A “ring-ring” type second-order angular focusing scheme is found. The focusing properties of the proposed energy analyzer are calculated. The instrumental function of the modified electron mirror in the case of a point source was obtained. The optimal values of the entrance parameters of the charged particle beams are obtained. The relative energy resolution in energy and luminosity of device are estimated.
提出了一种基于修正场的平面对称带电粒子束静电能量分析仪。确定了能量分析仪的最佳电光方案。建立了一种“环-环”型二阶角聚焦方案。计算了该能量分析仪的聚焦特性。得到了改进后的电子镜在点源情况下的仪器功能。得到了带电粒子束入口参数的最优值。估计了器件的能量和光度的相对能量分辨率。
{"title":"Development of a Mirror Energy Analyzer of Charged Particles Beams Based on a Modified Electrostatic Field","authors":"Zh.T. Kambarova, A. Saulebekov","doi":"10.1109/EFRE47760.2020.9242029","DOIUrl":"https://doi.org/10.1109/EFRE47760.2020.9242029","url":null,"abstract":"The plane-symmetrical electrostatic energy analyzer of charged particle beams based on a modified field is proposed. The optimal electron-optical scheme of the energy analyzer is determined. A “ring-ring” type second-order angular focusing scheme is found. The focusing properties of the proposed energy analyzer are calculated. The instrumental function of the modified electron mirror in the case of a point source was obtained. The optimal values of the entrance parameters of the charged particle beams are obtained. The relative energy resolution in energy and luminosity of device are estimated.","PeriodicalId":190249,"journal":{"name":"2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)","volume":"36 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":"129208487","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
期刊
2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1