A high-voltage gas discharge electron gun device

Abstract

The invention provides an electronic gun device for high-voltage gas discharge. The electronic gun device comprises a cathode insulator, a high-voltage insulator, a sealing top cover, a first section of gun shell, an insulating trap, an anode, a second section of gun shell, a first focusing coil, a second focusing coil and a deflection scanning coil, wherein the cathode insulator, the high-voltage insulator, the sealing top cover, the insulating trap and the anode are positioned in the first section of gun shell; the first focusing coil, the second focusing coil and the deflection scanning coil are positioned in the second section of gun shell; the cathode insulator, the high-voltage insulator, the insulating trap, the anode, the first focusing coil, the second focusing coil and the deflection scanning coil are coaxial and are sequentially distributed along the axis from top to bottom. According to the electronic gun device for the high-voltage discharge, the cathode life can be greatly prolonged, which is conductive to expanding the application field of a cold cathode electron beam machining technology.

Description

technical field [0001] The present invention relates to an electron gun device, in particular to a gas discharge electron gun device, specifically a high-voltage gas discharge electron gun device. Background technique [0002] At present, electron beam processing technology has been widely used in aerospace, weapons, automobiles and other civilian industries. One of the key technologies of electron beam processing equipment is the design and manufacture technology of electron gun. According to the difference in the way electrons are generated, electron guns can be divided into hot cathode electron guns and cold cathode electron guns. [0003] Hot cathode electron guns generate electrons by directly or indirectly heating a tungsten filament, usually a tungsten-based material, that needs to be heated to a relatively high temperature to emit electrons. In order to avoid the loss of the filament, the beam source section where the hot cathode electron gun generates electrons ne...

AI Technical Summary

Problems solved by technology

However, the commonly used cold cathode electron gun is difficult to adapt to the working conditions above 60kV

[0006] Aiming at the low operating voltage of cold cathode electron guns commonly used in the prior art, it is difficult to adapt to electron beam welding occasions, and it is difficult to adapt to the working conditions above 60kV. There is an urgent need for a high-voltage gas discharge electron gun device in this field

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