Dissipation of Pulsed Electron Beam in Hydrogen and Oxygen in High Pressure

2016 ◽  
Vol 685 ◽  
pp. 653-656
Author(s):  
Alexander Tabaev ◽  
Galina Kholodnaya ◽  
Roman Sazonov ◽  
Denis Ponomarev
Keyword(s):  
Electron Beam ◽  
Electron Accelerator ◽  
High Efficiency ◽  
Experimental Studies ◽  
Aluminum Foil ◽  
Pulse Electron Beam ◽  
Operating Environment ◽  
Pulsed Electron Beam ◽  
Nanosized Oxides ◽  
Dissipation Processes

This paper presents results of study of dissipation processes of pulsed electron beam in the oxygen and hydrogen (300 Torr). These gases are chosen owing of their use as a operating environment at pulse plasmochemical synthesis of nanosized oxides of metals. Experimental studies are conducted on the laboratory TEU-500 electron accelerator (500 keV electron energy; 10 кА ejected electron current; 60 ns half-amplitude pulse duration; 5 pps pulse repetition rate; diameter of a bunch is 5 cm). The electron beam was removed in a drift pipe through the anode window which is the supporting lattice (with optical transparency of 95%) and through aluminum foil 140 microns thick. The pipe of drift is equipped with three shunts of the return current which are fixing a signal at the same time. The received results of researches allow to make a conclusion. It is necessary to increase length to 80 cm and diameter to 30 cm of a pipe of drift for optimum absorption of a pulse electron beam by operating gas, for obtaining high efficiency of electron accelerator of pulse plasmochemical synthesis of nanosized oxides of silicon and the titan.

Preparation of Ag Nanoparticles by Particulate Radiation of Pulsed Electron Beam

2011 ◽  
Vol 287-290 ◽  
pp. 338-342
Author(s):  
Young Rang Uhm ◽  
Chang Kyu Rhee ◽  
Sergei Sokovnin ◽  
M.E Balezin
Keyword(s):  
Particle Size ◽  
Electron Beam ◽  
Ethylene Glycol ◽  
Ag Nanoparticles ◽  
Irradiation Time ◽  
Average Particle Size ◽  
Pulse Electron Beam ◽  
Average Particle ◽  
Beam Irradiation ◽  
Pulsed Electron Beam

Nano metal Ag nanoparticles were synthesized by pulse electron beam (e-beam) irradiation at room temperature and the atmospheric pressure. The staring materials were AgNO3, toluene, ethanol and ethylene glycol. The ethanol and ethylene glycol plays a role of prohibiting agglomeration of metal ions. Energy dispersive X-ray spectrometer (EDX) was used to characterize the elements. Transmission electron microscopy (TEM) images were used to determine the shape and diameter. The time of e-beam irradiation affect to the particle size and aggregation. The average particle size was 10 nm and 30 nm for the dose time of 1 and 5 min, respectively. The shape of particles were changed from spherical to disk-like to coral-like, with increasing the irradiation time from 1 to 5 to 10 min.

Pulsed Electron Beam Propagation in Oxygen

2016 ◽  
Vol 712 ◽  
pp. 31-36
Author(s):  
Galina Kholodnaya ◽  
Roman Sazonov ◽  
Denis Ponomarev ◽  
Artyem Poloskov
Keyword(s):  
Electron Beam ◽  
Drift Tube ◽  
Electron Accelerator ◽  
Reverse Current ◽  
Absorbed Dose ◽  
Beam Propagation ◽  
Drift Chamber ◽  
Beam Current ◽  
Electron Beam Current ◽  
Pulsed Electron Beam

The paper presents the results of the experimental investigation of the pulsed electron beam propagation propagated in a drift tube filled with oxygen. The pressure was 50, 300, and 760 Torr in the drift tube. The experiments were carried out using a TEA-500 pulsed electron accelerator (450 kV accelerating voltage; 10 kA electron beam current; 80±1 ns pulse duration to the base; up to 200 J pulse energy; and 5 cm diameter beam). The electron beam was propagated in the drift tube (40 cm long), 14 cm in diameter composed of two sections equipped with two reverse current shunts. The experiments were carried out which fixed the absorbed dose registered on the walls of the drift chamber.

scholarly journals Structure and mechanical properties of stainless-steel specimens, made by additive method, after pulsed electron beam treatment

2021 ◽  
Vol 2064 (1) ◽  
pp. 012076
Author(s):  
A D Teresov ◽  
E A Petrikova ◽  
O V Krysina ◽  
N A Prokopenko ◽  
Yu F Ivanov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Electron Beam ◽  
Longitudinal Direction ◽  
Tensile Tests ◽  
Pulse Electron Beam ◽  
Pulsed Electron Beam ◽  
Electron Beam Processing ◽  
Low Energy Electron ◽  
Sequential Electron

Abstract The article presents a method for finishing the surface of metal products made by sequential electron-beam surfacing, which consists in modifying the surface with an intense low-energy electron beam of submillisecond duration. On the example of 308LSi stainless steel, the results of such processing are demonstrated, the optimal modes of exposure are determined. It is shown that as a result of pulsed electron-beam processing, a homogeneous polycrystalline structure without cracks is formed on the surface with unchanged, relative to the initial material, elemental composition, strength (microhardness) and tribological (wear rate) properties. In this case, the surface roughness is reduced to 2.1 times in the longitudinal direction relative to the surfacing plane, to 5.2 times in the transverse direction. Tensile tests of specimens showed anisotropy of mechanical properties depending on the direction of tension relative to the surfacing plane, which decreases after surface pulse electron-beam processing.

Numerical Simulation for Surface Modification of Thermal Barrier Coatings by High-Current Pulse Electron Beam

2010 ◽  
Vol 654-656 ◽  
pp. 1807-1810
Author(s):  
Ying Qin ◽  
Wei Qu ◽  
Xian Xiu Mei ◽  
Sheng Zhi Hao ◽  
Ji Jun Zhao ◽  
...  
Keyword(s):  
Electron Beam ◽  
Thermal Barrier Coatings ◽  
Physical Vapor Deposition ◽  
Turbine Blades ◽  
Ceramic Coatings ◽  
Pulse Electron Beam ◽  
Thermal Barrier ◽  
High Current ◽  
Barrier Coatings ◽  
Pulsed Electron Beam

High current pulsed electron beam is an effective technique for surface sealing of ceramic thermal barrier coatings prepared by electron beam physical vapor deposition. Due to the rapid remelting and solidification, the outer layers of ceramic coatings become smooth and dense, and the protective performance for turbine blades is effectively improved. Because of the complex multi-layered structures in the coatings, a high-current pulsed electron beam treatment requires specific parameter inputs which are related to the temperature field induced by electron energy deposition in the coatings. In this paper, a two-dimensional temperature simulation was performed to demonstrate the melting depth and temperature evolution in ceramic coatings treated by high-current pulsed electron beam. Different energy densities and pulses were studied and discussed for obtaining optimized parameters.

Grain Refinement and Hardening Induced by Heavy Deformation Using Low Energy High Current Pulsed Electron Beam Surface Treatment

2010 ◽  
Vol 667-669 ◽  
pp. 499-504 ◽  
Author(s):  
Thierry Grosdidier ◽  
Y. Samih ◽  
Nathalie Allain-Bonasso ◽  
Bernard Bolle ◽  
Z.X. Zou ◽  
...  
Keyword(s):  
Grain Size ◽  
Electron Beam ◽  
Pulse Electron Beam ◽  
Low Energy ◽  
Temperature Fields ◽  
Material Surface ◽  
High Current ◽  
Pulsed Electron Beam ◽  
Size Refinement ◽  
Texture Modification

The low energy high current pulse electron beam (LEHCPEB) irradiation induces ultra fast dynamic temperature fields in the surface of the material to which is associated dynamic stress fields that causes intense deformation at the material surface and sub-surface. Improved surface properties (hardness, corrosion resistance) can be obtained using the LEHCPEB treatment. Under the “Melting” mode, the top surface (few µm) which is melted and rapidly solidified (107 K/s), can solidify has nano-domains formed from the highly under-cooled melt. The thermal stress wave that propagates in the sub-surface imposes strain hardening and grain size refinement. This induces a sub-surface hardening that can extent over about 100 µm. The use of the “Heating” mode is less conventional. This mode can promote grain size refinement, hardening as well as texture modification without modification of the sample geometry.

scholarly journals Microsecond REB generation in a planar diode at the U-2 device

1989 ◽  
Vol 7 (1) ◽  
pp. 139-144 ◽  
Author(s):  
A. V. Arzhannikov ◽  
A. P. Avrorov ◽  
M. P. Lyamzin ◽  
S. L. Sinitsky ◽  
M. V. Yushkov
Keyword(s):  
Electron Beam ◽  
Energy Transfer ◽  
Total Energy ◽  
High Power ◽  
High Efficiency ◽  
Experimental Studies ◽  
Planar Diode ◽  
Electron Beam Generation ◽  
Beam Generation ◽  
Capacitor Storage

Experimental studies on high power ∼ 10 μs electron beam generation have been carried out. High efficiency (about 75%) of energy transfer from a capacitor storage to the electron beam with total energy about 150 kJ has been attained.

Analysis of Desorbed Gases from Oxygen-free Copper Stimulated by Irradiation with Single Pulsed Electron Beam

2012 ◽  
Vol 132 (11) ◽  
pp. 951-957
Author(s):  
Hiroki Kaneko ◽  
Yasushi Yamano ◽  
Shinichi Kobayashi ◽  
Yoshio Saito
Keyword(s):  
Electron Beam ◽  
Pulsed Electron Beam
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