Investigation of the throughput of the dosing device gas leak for gas discharge electron gun

2012 ◽  
Vol 16 (5) ◽  
pp. 25-30
Author(s):  
I.V. Mel'nik ◽  
S.B. Tugaj
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Glow Discharge ◽  
High Voltage ◽  
Beam Current ◽  
Electron Gun ◽  
Technological Equipment ◽  
Gas Leak ◽  
Electron Guns ◽  
Empirical Coefficients

Model of capacity of valve with conic rod, which is used for control of beam current of high voltage glow discharge electron guns, is considered. Because of complicity of valve details geometry, mathematical model of dozed item is improved by suitable choosing of empirical coefficients and its approximation. On the base of modeling and experimental data analyzing of dependence of valve exploitation characteristics from geometry parameters of dozed item is provided. Obtained results can be used for simulation of stability of operation of high voltage glow discharge electron guns inconsisting of technological equipment

scholarly journals Methods and algorithm for calculating the focal parameters of a hollow conical electron beam in high-voltage glow discharge electron guns with a focusing magnetic lens

2021 ◽  
pp. 17-32
Author(s):  
Igor Melnyk ◽  
Sergey Tugay ◽  
Volodymyr Kyryk ◽  
Iryna Shved
Keyword(s):  
Electron Beam ◽  
Glow Discharge ◽  
High Voltage ◽  
Discrete Mathematics ◽  
Drift Region ◽  
Magnetic Lens ◽  
Focal Distance ◽  
Electron Guns ◽  
Focal Parameters ◽  
Focal Ring

The algorithm is considered for calculating the focal distance of a hollow conical electron beam generated by high-voltage glow discharge electron guns with magnetic focusing of the beam in the drift region, as well as a method for calculating the diameter of the focal ring and its thickness for such a beam. The proposed algorithm is based on the theory of electron drift in the field of a focusing magnetic lens and is designed using the methods of discrete mathematics and the minimax analysis. The obtained simulation results made it possible to establish the influence of the magnetic lens current on the focal diameter of a hollow conical electron beam and on its focal ring thickness. It is shown that the change in the focal parameters of a hollow conical electron beam can be effectively provided through the regulation of the magnetic lens current.

Principles of operation of high voltage glow discharge electron guns and some possibilities of their technological application

2017 ◽  
Author(s):  
Stanislav Denbnovetsky ◽  
Igor Melnyk ◽  
Vitaliy Melnyk ◽  
Boris Tugai ◽  
Sergiy Tuhai ◽  
...  
Keyword(s):  
Glow Discharge ◽  
High Voltage ◽  
Technological Application ◽  
Electron Guns

scholarly journals Study of the operating modes of the electrostatic lens of the welding electron gun

2021 ◽  
Vol 2077 (1) ◽  
pp. 012022
Author(s):  
E K Titarev ◽  
A L Goncharov ◽  
I A Kharitonov ◽  
A I Davletshin
Keyword(s):  
Mathematical Model ◽  
Electron Beam ◽  
Electron Beam Welding ◽  
Beam Current ◽  
Electron Gun ◽  
Beam Diameter ◽  
Operating Modes ◽  
Current Voltage ◽  
Different Temperatures ◽  
Current Voltage Characteristics

Abstract The paper presents the results of a study of the operating modes of a technological electron gun used in installations for electron beam welding. The design of an electron gun, which is part of the ELA-15I power complex, is considered, and the results of modeling the accelerating gap for a new design gun with an accelerating voltage of 120 kV are presented. The current-voltage characteristics of the gun operation were experimentally obtained at different temperatures of the main LaB6 cathode. For this, the beam current was recorded at different values of the control electrode potential. A mathematical model of the accelerating gap was implemented, which makes it possible to analyze the shape of the electron beam in the region of the first lens. Using a mathematical model, the shapes of the electron beam were calculated for various operating modes of the gun, and the characteristic transverse size of the beam in the crossover was determined. The beam diameter and the angle of convergence in the area of focusing the beam on the product were determined experimentally. Conclusions were made about the equality of the crossover diameters of the full-scale and mathematical models, as well as about the sufficient coincidence of the experimental and calculated volt-ampere characteristics. The design of the accelerating gap of the ELA-15 gun was optimized with an increase in the accelerating voltage from 60 kV to 120 kV. The optimization results are shown for the original and modified design in the form of a comparison of the patterns of the distribution of the electrostatic field strength and a comparison of the current-voltage characteristics.

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