Method and system for analyzing magnetic field of PCM focusing system based on equivalent model

An equivalent model, focusing system technology, applied in the size/direction of the magnetic field, design optimization/simulation, etc., can solve the problems such as tedious and time-consuming, difficult to obtain the target magnetic field, and simulation design of the electronic optical system. verbose effect

Pending Publication Date: 2022-04-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the traditional PCM magnetic system design often uses electromagnetic simulation software to perform a large number of sweeping calculations, and constantly tries to modify the magnetic system parameters based on experience. , which brings great troubles to the simulation design of the electron optical system

Method used

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  • Method and system for analyzing magnetic field of PCM focusing system based on equivalent model
  • Method and system for analyzing magnetic field of PCM focusing system based on equivalent model
  • Method and system for analyzing magnetic field of PCM focusing system based on equivalent model

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Embodiment 1

[0052] Embodiment 1: A method for analyzing the magnetic field of a PCM focusing system based on an equivalent model, which is specifically implemented by the following steps.

[0053] (1) According to the structural parameters of PCM, the magnetic block is equivalent to the corresponding rectangular current cylinder.

[0054] Such as figure 1 As shown, the rectangular current cylinder is formed by stacking multiple rectangular coils, and the magnetic block is magnetized B r The relationship with the current density I' is B r =μ 0 I', h1, h2 are the distances from the bottom and top of the magnetic block to the Z-axis, 2b is the width of the magnetic block, and T is the thickness of the magnetic block.

[0055] (2) Calculate the first axial magnetic field generated at the target space point by a single pair of rectangular coils under the target current.

[0056] Such as figure 2 and image 3 As shown, first calculate the first magnetic field of four parallel horizontal li...

Embodiment 2

[0079] Embodiment 2: PCM focusing system magnetic field analysis system based on equivalent model, this system is used to realize the analysis method as described in embodiment 1, such as Figure 5 As shown, it includes equivalent model module, magnetic field calculation module, integral processing module, cycle processing module, superposition processing module and correction iteration module.

[0080] Among them, the equivalent model module is used to equivalent the magnetic block to the corresponding rectangular current tube according to the PCM structural parameters; the magnetic field calculation module is used to calculate the first axial direction generated by a single pair of rectangular coils at the target space point under the target current Magnetic field; integral processing module, used for integral calculation to obtain the second axial magnetic field generated at the target space point under the target current after a single pair of rectangular coils expands to a...

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Abstract

The invention discloses a PCM focusing system magnetic field analysis method and system based on an equivalent model, and relates to the technical field of microwave electric vacuum, and the technical scheme is characterized in that a magnetic block is equivalent to a corresponding rectangular current cylinder; calculating a first axial magnetic field generated by the single pair of rectangular coils at the target space point; a second axial magnetic field generated by the rectangular current cylinder at the target space point is calculated in an integral mode; calculating a second axial magnetic field generated by each magnetic block pair at the target space point; superposing the second axial magnetic fields of the magnetic block pairs, and calculating to obtain a total magnetic field; and comparing the magnetic field peak value of the total magnetic field with the target magnetic field peak value, correcting the magnetizing of the magnetic blocks, carrying out iterative calculation until the difference value between the magnetic field peak value of the total magnetic field and the target magnetic field peak value is smaller than a threshold value, and outputting the magnetizing condition and the axial magnetic field of each magnetic block. According to the method, through PCM magnetic field equivalent calculation and rapid reverse design, the specific magnetic block magnetizing conditions of the target magnetic field and the PCM magnetic system can be calculated in an extremely short time.

Description

technical field [0001] The invention relates to the field of microwave electric vacuum technology, more specifically, it relates to an equivalent model-based PCM focusing system magnetic field analysis method and system. Background technique [0002] Strip electron injection microwave devices use rectangular or elliptical cross-section electron beams with large aspect ratios, which reduces the space charge effect and expands the interaction area. Research on various microwave electron tubes that are gradually developing to higher radiation power and higher operating frequency fields are widely used. [0003] The movement of the ribbon-shaped electron beam in the case of uniform magnetic field focusing is unstable, and the electron beam will appear kinks and tears with the increase of the transmission distance, which is called Diocotron instability. Fortunately, the periodic magnetic focusing structure is proved to be effective in overcoming this instability. In the periodi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G01R33/02
CPCG06F30/20G01R33/02
Inventor 何红宾徐进李鸿儒苏子轩岳玲娜殷海荣赵国庆王文祥魏彦玉
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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