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Mixed period permanent magnet focusing system of single-row multi-electron-beam terahertz radiation source

A technology of periodic permanent magnet focusing and periodic permanent magnet, which is applied in the direction of transit time type electron tubes, circuits, discharge tubes, etc. Effect

Active Publication Date: 2021-10-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Application Information

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Problems solved by technology

[0006] Aiming at the problem that the single-row multi-electron beam focusing system described in the background technology is not perfect enough, the present invention provides a new hybrid periodic permanent magnet focusing system suitable for single-row multi-electron beam terahertz radiation sources

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  • Mixed period permanent magnet focusing system of single-row multi-electron-beam terahertz radiation source
  • Mixed period permanent magnet focusing system of single-row multi-electron-beam terahertz radiation source
  • Mixed period permanent magnet focusing system of single-row multi-electron-beam terahertz radiation source

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[0039] According to the design goal of the single-row multi-electron beam terahertz radiation source and the design idea of ​​the overall structure, the working voltage range is 12.4-13.4kV, 4 electron beams, the total current is 7mA, and the current density is 9.9A / cm 2 , the structural dimensions of the focusing system are shown in Figure 2, Figure 3 and Figure 4, a=0.2mm, b=2.16mm, c=0.7mm, d=0.2mm, e=6mm, f=1mm, g =3.5mm, h=4mm, i=2.4mm, j=1.6mm, k=6mm, l=2mm, m=3.6mm, n=5mm, o=8mm, p=10mm, q=6mm, r=10mm , s=1.9mm.

[0040] Figure 7 The ring-shaped focusing system structure of the traditional periodic permanent magnet focusing system in the z direction is retained, and the arrow indicates the magnetization direction of the permanent magnet; the transversely magnetized periodic permanent magnet focusing system is distributed at equal intervals along the z direction on both sides of the wide side of the electron channel On the side, the dot in the figure indicates that th...

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Abstract

The invention provides a mixed period permanent magnet focusing system of a single-row multi-electron beam terahertz radiation source. The system is designed by combining a transverse magnetization period permanent magnet system and a longitudinal magnetization period permanent magnet system and comprises two groups of period permanent magnet assemblies and a group of period pole shoe assemblies. The cone permanent magnets distributed on the two sides of the wide edge of the electron channel form a transverse magnetization period permanent magnet system, the rectangular annular permanent magnets surrounding the electron channel form a longitudinal magnetization period permanent magnet system, and the transverse magnetization period permanent magnet system and the longitudinal magnetization period permanent magnet system are mainly used for bunching electron beams in the x direction and the y direction respectively. By combining the two focusing systems, bunching of electrons can be realized in x and y directions so that stable transmission of single-row multi-electron beams is realized, and the problem of unstable transmission of electron beams caused by electron beam divergence when the single-row multi-electron beams are transmitted in an anode electron channel is solved; and the beam-wave interaction efficiency and the performance of the whole device are improved.

Description

technical field [0001] The invention belongs to the technical field of vacuum electrons, and more specifically relates to a single-row multi-electron beam terahertz radiation source mixed period permanent magnet focusing system. Background technique [0002] In vacuum electronic devices, whether electron beams can be transported stably determines the strength of beam-wave interaction, and is one of the key factors affecting the performance of vacuum electronic devices. The more stable the trajectory and shape of the electron beam during the transmission process, the more obvious the beam-wave interaction effect will be. The single row of multi-electron beams generated and emitted by the electron gun will inevitably have a certain radial velocity after being compressed by the focusing pole, and after the single row of multi-electron beams enter the anode electron channel, the space charge effect between the electrons will cause the gap between the electrons. Therefore, the e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J23/087
CPCH01J23/087
Inventor 张开春赵小艳胡锦程郭思豆熊能徐望炬刘頔威胡旻
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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