An Automatic Tuning Method of Electron Gun Filament Heating Current Based on Constant Electron Beam Current

A technology of electron beam current and heating current, applied in circuits, discharge tubes, electrical components, etc., can solve the problem of inability to take into account the service life of electron beam filament cathode, and achieve the effect of prolonging life

Active Publication Date: 2018-01-05
GUILIN THD TECH CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing electron beam processing equipment cannot take into account both the quality of the electron beam and the service life of the filament cathode, and provides an automatic setting method for the heating current of the electron gun filament based on the constant electron beam current

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An Automatic Tuning Method of Electron Gun Filament Heating Current Based on Constant Electron Beam Current
  • An Automatic Tuning Method of Electron Gun Filament Heating Current Based on Constant Electron Beam Current
  • An Automatic Tuning Method of Electron Gun Filament Heating Current Based on Constant Electron Beam Current

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The principle of the present invention based on the electron gun filament heating current automatic setting method with constant electron beam current is as follows:

[0029] The acceleration voltage of the three-pole Pierce electron gun is stabilized at U a value, the electron beam current is stable at I E Value, after the filament current reaches a certain value, the grid bias voltage -U G vs. filament current I K It is an exponential function relationship with the natural number e as the base, such as figure 1 shown. Define the filament current I K with minimum filament current I Kmin The difference is the relative filament current I k =I K -I Kmin , defining the gate bias voltage -U G with the minimum gate bias voltage -U Gmin The difference is the relative gate bias voltage -U g =-U G -(-U Gmin )=ψ(I k ), then after the filament current exceeds a certain value, the relative grid bias voltage -U g with relative filament heating current I k The relati...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention discloses an electron beam current constant condition-based electron gun filament heating current automatic setting method. The working current of a filament is calculated through changing the magnitude of the current of the filament under an electron beam current constant condition. According to the method of the invention, judgment and control are performed on the quantification of the saturation degree of the heating current of the filament, so that the high quality performance of the electron beams of a triode pierce type electron gun can be fully exerted, and the service life of the cathode of the filament can be prolonged to the greatest extent.

Description

technical field [0001] The invention relates to the technical field of electron beam processing equipment, in particular to an automatic setting method for heating current of an electron gun filament based on a constant electron beam current. Background technique [0002] Electron beam processing equipment using an axisymmetric Pierce electron gun, the cathode emits electron beams subject to a temperature-limited state and a space-charge-limited state. In order to improve the quality of the electron beam, the temperature limitation state of the existing electron beam processing equipment is saturated emission, and in the space charge limitation state, the acceleration voltage is a constant value, and the grid bias voltage -U is changed b To change the effective emission area of ​​the cathode to control the electron beam current, the cathode (filament) adopts a constant current control method. [0003] However, due to the difference in materials and geometric dimensions betw...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H01J37/24
CPCH01J37/242
Inventor 韦寿祺黄小东费翔陆苇秦玉江郭华艳
Owner GUILIN THD TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap