Variable beam entrance Faraday cup system for pulsed electron beam current profile characterization

2020 ◽  
Vol 91 (11) ◽  
pp. 113303
Author(s):  
Weijie Huo ◽  
Jing Hu ◽  
Ling Qin ◽  
Xiaotong Cao ◽  
Wansheng Zhao
Keyword(s):  
Electron Beam ◽  
Beam Current ◽  
Electron Beam Current ◽  
Current Profile ◽  
Faraday Cup ◽  
Pulsed Electron Beam

scholarly journals Investigation of the effect of condensed phase on the energy conditions for the initiation of the plasma-chemical process of flue gas cleaning by a pulsed electron beam

2021 ◽  
Vol 2064 (1) ◽  
pp. 012099
Author(s):  
R Sazonov ◽  
G Kholodnaya ◽  
D Ponomarev ◽  
I Egorov ◽  
A Poloskov ◽  
...  
Keyword(s):  
Electron Beam ◽  
Flue Gas ◽  
Chemical Reactor ◽  
Drift Chamber ◽  
Beam Current ◽  
Energy Conditions ◽  
Electron Beam Current ◽  
Plasma Chemical ◽  
Pulsed Electron Beam ◽  
Gas Cleaning

Abstract This work investigates the processes of dissipation of the charge and energy of a pulsed electron beam in gas compositions (nitrogen, carbon dioxide and oxygen) in the presence of ammonium sulphate and nitrate. A pulsed electron beam generated by the TEA-500 accelerator (Tomsk, Russia) with an electron energy of up to 410 keV, a beam current of up to 5 kA (I0 ), and a half-amplitude voltage pulse duration of 60 ns was injected into a 46 cm long drift chamber filled with a gas mixture. The pulsed electron beam current (IFC ) passing through the drift chamber was registered using a sectioned calorimeter with beam charge monitor function, and the efficiency of the current passage of the beam was determined as the ratio qFC/q0 , where q0 is the beam charge measured at the place of its injection into the chamber drift. The pressure in the drift chamber varied (375, 560 and 760 Torr, humidity value 15% ± 5% and 50% ± 5%). The geometric dimensions of the plasma-chemical reactor for initiating plasma-chemical reactions of flue gas cleaning were determined.

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.

Cathodoluminescence of SiO2/Si System

2009 ◽  
Vol 156-158 ◽  
pp. 487-492 ◽  
Author(s):  
M.V. Zamoryanskaya
Keyword(s):  
Activation Energy ◽  
Electron Beam ◽  
Rise Time ◽  
Silicon Oxide ◽  
Beam Current ◽  
Electron Beam Current ◽  
Electron Traps ◽  
Definition Of ◽  
Luminescent Centers

In this paper the new method for determination of luminescent centers concentration are discussed. While the possibility of electron traps determination and definition of its activation energy are suggested. The cathodoluminescent (CL) method was used. The determination of luminescent centers concentration in silicon oxide is based on the measurements of dependences of CL intensity on electron beam current. The presence and energy of activation of electron traps were studied by measurement of rise time and decay of luminescent band during the stationary irradiation of silica by electron beam.

scholarly journals The Corrosion Studies of Electron Beam Welded Nickel Alloy

2019 ◽  
Vol 253 ◽  
pp. 03005 ◽  
Author(s):  
M. Sroka ◽  
E. Jonda ◽  
M. Węglowski ◽  
S. Błacha
Keyword(s):  
Electron Beam ◽  
Process Parameters ◽  
Microstructural Analysis ◽  
Solidification Process ◽  
Beam Current ◽  
Surface Oxide Layer ◽  
Electron Beam Current ◽  
Corrosion Properties ◽  
Inconel 617 ◽  
Potentiodynamic Anodic Polarization

The paper presents the influence of electron - beam (EB) remelting effect on the surface layer electrochemical parameters obtained from potentiodynamic anodic polarization studies and impedance spectroscopy measurements for a set of Inconel 617 electron beam remelted obtained for different process parameters. The correlation between EBW process parameters and characteristic of surface oxide layer properties and resistance to the acidic environment were discussed. The electrochemical studies were supported by microstructural analysis of the remelted zone (RZ), heat affected zone (HAZ), native metal and observed precipitates formed under rapid solidification process. Both electrochemical technics applied to evaluate corrosion properties of remelted Inconel 617 evidenced a strong influence of the electron beam current on the corrosion resistance.

scholarly journals NUMERICAL ANALYSIS OF LASING DYNAMICS IN VOLUME FREE ELECTRON LASER

2008 ◽  
Vol 13 (2) ◽  
pp. 263-273
Author(s):  
Svetlana Sytova
Keyword(s):  
Electron Beam ◽  
Free Electron ◽  
Free Electron Laser ◽  
Initial Conditions ◽  
Beam Current ◽  
Beam Current Density ◽  
Electron Beam Current ◽  
Nonlinear Phenomena ◽  
Experimental Development ◽  
Lasing Dynamics

Nonlinear phenomena originating in volume free electron laser (VFEL) are investigated by methods of mathematical modelling using computer code VOLC. It was demonstrated the possibility of excitation of quasiperiodic oscillations not far from threshold values of electron beam current density and VFEL resonator length. It was investigated sensibility of numerical solution to initial conditions for different VFEL regimes of operation. Parametric maps with respect to electron beam current and detuning from synchronism condition present complicated root to chaos with windows of periodicity in VFEL. Investigation of chaotic lasing dynamics in VFEL is important in the light of experimental development of VFEL in Research Institute for Nuclear Problems.

Effect on LY12 Aluminum Alloy Welding Joint Microstructure and Properties with Electron Beam Welding Technical Parameters

2013 ◽  
Vol 475-476 ◽  
pp. 1275-1279
Author(s):  
Qiang Zheng ◽  
Cheng Gang Yang ◽  
Yu He ◽  
He Chen ◽  
Ai Wu Yu
Keyword(s):  
Aluminum Alloy ◽  
Electron Beam ◽  
Weld Metal ◽  
Heat Affected Zone ◽  
Welding Speed ◽  
Electron Beam Welding ◽  
Beam Current ◽  
Electron Beam Current ◽  
Micro Hardness ◽  
Technical Parameters

LY12 aluminum alloy was welded with vacuum electron beam welding, the effect of welding speed and electron beam current on the weld microstructure and mechanical properties of welding joints were studied, the results were shown that with the increasing of welding speed or decreasing of electron beam current, the grains in weld metal were refined, so the joint strength were increased. When the electron beam current was 18mA, the welding speed was 1000mm/min, the grains of weld metal were the finest, and the tensile strength was 373.2MPa. In addition, the micro-hardness of weld metal was much lower than base metal and heat affected zone, and the heat affected zone had certain softening phenomenon. With the increasing of welding speed or decreasing of electron beam current, the micro-hardness of weld metal was increased respectively.

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