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Sheet electron beam generation cathode for vacuum electronic device

A technology of strip electrons and vacuum electrons, which is applied to the cathode of transit-time electron tubes, can solve the problems of inconvenient processing and installation, complex structure of strip electron injection, etc., and achieves easy assembly, simple structure, and large emission current. Effect

Inactive Publication Date: 2014-04-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electron gun produces a strip-shaped electron beam with a complex structure and is not easy to process and install.

Method used

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  • Sheet electron beam generation cathode for vacuum electronic device
  • Sheet electron beam generation cathode for vacuum electronic device
  • Sheet electron beam generation cathode for vacuum electronic device

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Embodiment Construction

[0025] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.

[0026] figure 1 It is a structural schematic diagram of a specific embodiment of the cathode used to generate a strip-shaped electron beam in the vacuum electronic device of the present invention.

[0027] In this example, if figure 1 As shown, the cathode used to generate a strip-shaped electron beam in the vacuum electronic device of the present invention includes a thin conductor sheet 1 and a backflow control ramp 2 made of a conductor.

[0028] The width and thickness of the conductor sheet 1 and the length from the front end 101 to the rear end 102 are determined ac...

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Abstract

The invention discloses a sheet electron beam generation cathode for a vacuum electronic device. The cathode comprises a conductor sheet, wherein the width, the thickness and the length from the front end to the rear end of the conductor sheet are proper, and meet the design requirements of the vacuum electronic device. When higher voltage is applied, an electric field at the front end of the conductor sheet is high in intensity, electrons are withdrawn from the conductor sheet, plasmas are generated at the front end of the conductor sheet when the applied voltage is further increased, and higher current is withdrawn from the plasmas by the high-intensity electric field to form sheet electron beams. When the current is higher, the current withdrawn from the plasmas flows forwards along a magnetic line of force, and an inclined surface body is impacted by the backwards-flowing current; from the point of energy, the potential is unchanged when the inclined surface body is impacted by the backwards-flowing current, so that energy loss is avoided. The sheet electron beam generation cathode for the vacuum electronic device has the characteristics of high efficiency and high current, and also has the advantages of low cost and easiness in machining and assembly.

Description

technical field [0001] The invention belongs to the technical field of vacuum electronic devices, and more specifically, relates to a cathode used for producing strip-shaped electron beams in vacuum electronic devices such as traveling wave tubes, back wave tubes, back wave oscillators, free electron lasers, and Oro tubes. . Background technique [0002] With the advancement of science and technology, the demand for vacuum electronic devices tends to be higher in power and frequency. Therefore, ribbon-shaped electron injection vacuum electronic devices that can generate high power and high frequency output have become a research hotspot at home and abroad. [0003] However, vacuum electronic devices using ribbon electron beams, such as ribbon electron beam traveling wave tubes, back wave tubes, back wave oscillators, free electron lasers, and Oro tubes, all face a key problem, that is, how to generate ribbon electron beams. [0004] Various research groups at home and abroa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J23/04
Inventor 王战亮刘帅红宫玉彬魏彦玉王少萌许雄冯进军刘振邦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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