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

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Effect of Nanosecond Repetitive Pulsed Microwave Exposure on Proliferation of Bone Marrow Cells 纳秒重复脉冲微波照射对骨髓细胞增殖的影响
Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9241901
A. Gostyukhina, K. Zaitsev, A. Kereya, O. Kutenkov, M. Bolshakov, V. Rostov
The purpose was to study the proliferative activity of bone marrow mononuclear cells (BMNCs) of rats after irradiated by nanosecond repetitive pulsed microwave (RPM). It was found that the irradiated by nanosecond microwave pulses can affect the BMNCs proliferation in vitro. It is important that both stimulation and inhibition of proliferation were observed after exposure. The effect depended on the pulse repetition frequency. The amount of BMNCs increased after exposure to pulse repetition frequency of 13 Hz up to 30% in comparison with a control cells and up to 51% in comparison with a false-irradiated cells. In contrast, there was inhibition up to 40% of BMNCs after exposure to a frequency of 8 Hz, in comparison with a control group.
目的研究纳秒重复脉冲微波(RPM)辐照后大鼠骨髓单核细胞(bmnc)的增殖活性。结果表明,纳秒微波脉冲对体外培养的bmnc增殖有影响。重要的是,暴露后观察到增殖的刺激和抑制。效果取决于脉冲重复频率。暴露于脉冲重复频率为13 Hz的细胞后,bmnc的数量比对照细胞增加了30%,比假辐照细胞增加了51%。相比之下,与对照组相比,暴露于8 Hz频率后,bmnc的抑制率高达40%。
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引用次数: 0
Mechanical Properties and Tribological Behavior of Multilayer Intermetallics Ti-Al-N/Ti-Al Coatings Deposited by Vacuum Arc Plasma 真空电弧等离子体沉积多层金属间化合物Ti-Al- n /Ti-Al涂层的力学性能和摩擦学行为
Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242151
E. Vardanyan, K. Ramazanov, R. Nagimov, A. Nazarov
In this work, multilayer coatings with alternating macro layers (layers formed during one gas change Ar or N2) TiAl / TiAlN were investigated. The study was divided into two stages. At the first step, the optimal ratio $S$ of the thickness of the nitride macro layer (hTi-Al-N) to the macro layer formed in argon (hTi-Al) was determined. After that, laboratory studies of the physicomechanical properties of coatings with different $S$ values ($S gg 1, S = 1, S ll 1$), and production tests of end mills with these coatings were carried out. According to the results of the tests determined the optimal value of $S$ providing the greatest value of tool life. The next step, to determine the thickness of the macrolayers (hTi-Al-N) and (hTi-Al) providing the greatest mechanical and functional properties of the developed coatings was studies
在这项工作中,研究了具有交替宏观层(在一次气体变化中形成的层)的TiAl / TiAlN多层涂层。研究分为两个阶段。首先,确定了氮化物宏观层(hTi-Al- n)厚度与氩气宏观层(hTi-Al)厚度的最佳比值$S$。然后,对不同S$值(S gg 1, S = 1, S ll 1$)涂层的物理力学性能进行了实验室研究,并对使用这些涂层的立铣刀进行了生产试验。根据试验结果确定了$S$的最优值,提供了$S$最大的刀具寿命值。下一步,研究了提供最大机械性能和功能性能的宏观层(hTi-Al- n)和(hTi-Al)的厚度
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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。
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引用次数: 1
Electrical Diagnostics of Surface Dielectric-Barrier Discharge with Coaxial Configuration 同轴结构表面介质阻挡放电的电学诊断
Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242090
Ratmir A. Aznabaev, A. Astafiev, M. Pinchuk, V. Snetov, O. Stepanova
A coaxial electrode configuration with surface dielectric barrier discharge was designed to generate a cold plasma jet flowing out into the ambient air. A technique for determining the plasma region extension based on measuring average current and applied voltage has been proposed. The capacitance of the system was calculated from measured current and voltage. Using photographic images of the discharge region, the specific capacitance of the discharge system was determined depending on the electric parameters. The obtained values were compared with the calculated capacitance of the given electrode system geometry.
设计了一种具有表面介质阻挡放电的同轴电极结构,以产生一种冷等离子体射流。提出了一种通过测量平均电流和外加电压来确定等离子体区域扩展的方法。根据测量的电流和电压计算出系统的电容。利用放电区域的照相图像,根据电学参数确定了放电系统的比电容。将所得值与给定电极系统几何形状的计算电容进行了比较。
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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。
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引用次数: 0
Metal-Ceramic Nanocomosite for Radiation Shielding of Electronics 电子器件辐射屏蔽用金属-陶瓷纳米复合材料
Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242100
O. Khasanov, E. Dvilis, M. Petyukevich, I. Shamanin
Full dense llightweight nanostructured metal-ceramic composite has been developed for the purpose of radiation shielding of electronic components exposed to radiation flows of electrons, ions, γ-rays, neutrons. The composite consisted of AMg6 (77.9 vol%) +B4C (18.8 vol%)+W (3.3 vol%) was sintered by the SPS method up to 100% density at 490°C / 40 MPa. The microhardness of this composite was 419.9 HV; Young modulus was 98620 N/mm2; creep under indentation was 1.45%. The attenuation coefficient of the developed composite for γ-rays was 1.34 times more in comparison with the pure AMg6 alloy; the attenuation coefficient for thermal and superthermal neutrons was 2.2 times more.
全密度轻量化纳米结构金属-陶瓷复合材料被开发用于电子元件暴露于电子、离子、γ射线、中子的辐射流中的辐射屏蔽。该复合材料由AMg6 (77.9% vol%)+ B4C (18.8 vol%)+W (3.3 vol%)组成,在490℃/ 40 MPa下采用SPS法烧结至100%密度。该复合材料显微硬度为419.9 HV;杨氏模量为98620 N/mm2;压痕下蠕变为1.45%。制备的复合材料对γ射线的衰减系数是纯AMg6合金的1.34倍;热中子和过热中子的衰减系数是前者的2.2倍。
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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。
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引用次数: 0
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。
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引用次数: 0
Directional Couplers for X-band High-Power Microwave Oscillators 用于x波段大功率微波振荡器的定向耦合器
Pub Date : 2020-09-14 DOI: 10.1109/EFRE47760.2020.9242097
A. Klimov, V. Konev, E. M. Tot’meninov, V. Rostov
Two directional couplers (for the TM01 and TE11 modes of a circular waveguide) have been built to use on high-power nanosecond relativistic microwave oscillators. Both couplers operate between 9 and 10 GHz.
两个定向耦合器(用于圆波导的TM01和TE11模式)已经建成用于高功率纳秒相对论微波振荡器。两个耦合器都工作在9到10 GHz之间。
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引用次数: 0
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。
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引用次数: 0
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2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE)
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