Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for determining number of micro-discharge secondary electrons of dielectric window

A technology for secondary electrons and secondary electron emission, which can be used in complex mathematical operations and other directions, and can solve problems such as large analysis errors and no consideration of the influence of induced charges.

Active Publication Date: 2019-12-10
XIAN INSTITUE OF SPACE RADIO TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] International research on dielectric window microdischarge has been carried out, and the angle and speed of secondary electron emission are randomly processed, and the sensitivity curve of dielectric microdischarge is given, but it uses a fixed DC electric field, and the actual dielectric microdischarge process , the DC electric field changes over time with the multiplication of secondary electrons. The current method does not consider the influence of the dynamic change of the induced charge on the micro-discharge process, and the analysis error is large.

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
  • Method for determining number of micro-discharge secondary electrons of dielectric window
  • Method for determining number of micro-discharge secondary electrons of dielectric window
  • Method for determining number of micro-discharge secondary electrons of dielectric window

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0102] This method is suitable for the situation where microdischarge occurs when electromagnetic waves pass through the dielectric window. Here, the secondary electron emission coefficient is 3, E max The dielectric window = 420eV is taken as an example to introduce the realization process of this method. The number of macro particles NN=10 4 , iteration steps M=900, E dc =0.15MV / m, RF field E rf0 0.5, 0.8, 1.5MV / m, f is 1GHz, initial phase θ=0, dielectric window area A=4cm 2 . E.om =2.1eV, N 0 =1, the outgoing energy and angle of electrons satisfy the following probability density function:

[0103]

[0104]

[0105] According to the third method above, the change curve of the number of electrons with time is as follows: image 3 As shown, the dynamic change of the DC field leads to the phenomenon of saturation oscillation in the number of space electrons, and the change curve of the DC electric field with time is shown in Figure 4 shown.

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 invention discloses a method for determining the number of micro-discharge secondary electrons of a dielectric window. Firstly, energy and angles of secondary electron emission are randomly processed, collision energy of electrons and a medium is determined according to an initial direct-current electric field and a radio-frequency field, a secondary electron emission coefficient is obtained,accumulated charges on the surface of the medium are updated according to the yield of secondary electrons, and the direct-current electric field is updated. A plurality of electrons are adopted for average processing in micro-discharge analysis, dynamic changes of a direct-current electric field are considered, and the changing process of the number of medium window micro-discharge secondary electrons under the coupling effect of the dynamic direct-current electric field and a radio-frequency electric field is obtained.

Description

technical field [0001] The invention relates to a method for determining the number of secondary electrons in a dielectric window micro-discharge, which belongs to the field of microwave device micro-discharge. Background technique [0002] With the development of satellite communication technology in the direction of high power, space microwave components are required to withstand higher and higher power, and the power requirements for dielectric windows continue to increase in ground tests. Dielectric windows are widely used in high power microwave and terrestrial test systems. The two sides of the dielectric window are air and vacuum respectively, and the radio frequency electric field is distributed along the surface of the medium, which will cause micro-discharge on the vacuum side of the dielectric window. [0003] The dielectric microdischarge effect is an important factor restricting the power capacity of the dielectric window. The existence of the medium makes the ...

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 Applications(China)
IPC IPC(8): G06F17/10
CPCG06F17/10
Inventor 王新波崔万照张洪太李韵白鹤冉立新
Owner XIAN INSTITUE OF SPACE RADIO TECH