High-assembly-accuracy grid-control electronic gun

A gate-controlled electron gun and assembly precision technology, applied in the field of electron guns, can solve the problems of poor insulation, low reliability, and low precision of electron guns, and achieve the effects of ensuring concentricity and extending creepage paths

Active Publication Date: 2014-10-01
NANJING SANLE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 3. The insulation between the electrodes of the electron gun is poor, and it is easy to spark;
[0006] 4. The electron beam is easily affected by the external electric field, and the state of the electron beam is easy to change;
[0007] 5. The assembly precision is low, and it is impossible to emit electron beams of a specific shape that conform to the working of the coupling cavity traveling wave tube.
[0008] Due to the above deficiencies, the electron guns in the prior art have short service life, low precision, and low reliability, and cannot meet the assembly requirements of high-standard coupled cavity traveling wave tubes.

Method used

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  • High-assembly-accuracy grid-control electronic gun
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  • High-assembly-accuracy grid-control electronic gun

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Embodiment Construction

[0035] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0036] Such as Figure 1 to Figure 3 As shown, a grid-controlled electron gun with high assembly accuracy includes: a cathode heating wire assembly, a heat shield assembly, a support cylinder assembly, a control grid assembly, a shadow grid assembly, a gun shell assembly, and a magnetic shield welding cylinder assembly;

[0037] The cathode heating wire assembly includes a cathode (1), a cathode support cylinder (8) welded to the cathode (1), and a heating wire (...

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Abstract

The invention discloses a high-assembly-accuracy grid-control electronic gun which comprises a cathode hot wire component, a heat shield combination, a supporting cylinder combination, a control grid combination, a shadow grid combination, a gun shell combination and a magnetism shield welding cylinder combination. The electronic gun is reasonable in design, assembling parts of the electronic gun are screened out through a large number of experiments, and the electronic gun with high accuracy is obtained by assembling. The electronic gun is long in service life and high in reliability and stability, a specific-shaped electron beam can be provided for a coupled cavity traveling-wave tube, the assembling requirement of the high-standard coupled cavity traveling-wave tube can be well met, and the shortcomings of the prior art can be overcome.

Description

technical field [0001] The invention relates to an electron gun for a traveling wave tube, in particular to a gate-controlled electron gun with high assembly precision for a coupling cavity traveling wave tube, which can provide an electron beam of a specific shape for the coupling cavity traveling wave tube. Background technique [0002] As an important part of the traveling wave tube, the electron gun is the source of the input energy of the traveling wave tube, and its long life and high reliability are very important. And electron gun in the prior art has following shortcoming: [0003] 1. Under high current density, the cathode life is short; [0004] 2. Positive ions bounce back to the cathode under the electric field of the electron gun; [0005] 3. The insulation between the electrodes of the electron gun is poor, and it is easy to spark; [0006] 4. The electron beam is easily affected by the external electric field, and the state of the electron beam is easy to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J23/06
Inventor 刘荣荣张伟燕孙自强刘宇荣马静胥辉吴亚琴宋建婷
Owner NANJING SANLE GROUP
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