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Self-current-stabilizing micropulse electronic gun based on secondary electron multiplying

A secondary electron multiplication and micro-pulse technology, which is applied in the direction of electron multiplier tubes, electron multiplier details, dynodes, etc., can solve the problems that the instability of micro-pulse electron guns hinders the practical application of micro-pulse electron guns, and the output current is unstable. , achieving high average flow intensity and easy installation

Inactive Publication Date: 2014-08-27
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after 20 years of research, this micro-pulse electron gun based on secondary electron multiplication has not been put into practical application. The reason is that the output current of the existing micro-pulse electron gun is not stable, and the instability of the operation of the micro-pulse electron gun Greatly impedes the practical application of micropulse electron guns

Method used

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  • Self-current-stabilizing micropulse electronic gun based on secondary electron multiplying
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  • Self-current-stabilizing micropulse electronic gun based on secondary electron multiplying

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Embodiment

[0032] Example: such as Figure 8 As shown, in this embodiment, the self-stabilizing flow micro-pulse electron gun based on secondary electron multiplication is installed on the existing experimental platform, and the tapered waveguide 8 is connected to the T-shaped waveguide of the three-way through the tapered waveguide flange 9. The T One end of the type waveguide is connected to the microwave power source, one end is connected to the main cavity, and the other end is connected to the vacuum pump; on the existing experimental platform, the signal source and the pulse modulator are respectively connected to the input end of the power amplifier, and the output end of the power amplifier is sequentially passed through the directional coupler, the waveguide and the vacuum pump. The shaft converter, the ceramic window and the T-shaped waveguide are connected to the tapered waveguide flange 9; the two output ends of the directional coupler are respectively connected to the peak po...

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Abstract

The invention relates to a self-current-stabilizing micropulse electronic gun based on secondary electron multiplying. The electronic gun comprises an inwards concave cavity, a groove is formed in the bottom of the inwards concave cavity, a round hole is formed in the top of the inwards concave cavity, and the cathode stretches into the round hole; a channel through the groove is formed in the arc-shaped end face side of the inwards concave cavity, and a rectangular hole is formed in the rectangular end face side; a through hole is formed in the center of a round cover plate at the top of a grid cover plate, and the grid cover plate is clamped on a stepped structure on the periphery of the groove; threads are arranged on the inner wall face of a hollow pipe at the bottom of the grid cover plate; two water tank outer shells are welded to the two ends of the cavity respectively and provided with holes; a first pipeline flange is connected with the cathode, penetrates through the holes of the water tank outer shells and then is tightly connected with the top of the inwards concave cavity, a second pipeline flange and the hollow pipe at the bottom of the grid cover plate are welded together, and a third pipeline flange is welded to the arc-shaped end face of the inwards concave cavity; a tapered waveguide outlet end is welded to the rectangular end face of the inwards concave cavity, and a tapered waveguide flange is welded to the inlet end.

Description

technical field [0001] The invention relates to a microwave electron gun, in particular to a self-stabilizing flow micro-pulse electron gun based on secondary electron multiplication. Background technique [0002] The micro-pulse electron gun based on secondary electron multiplication emission is a kind of microwave electron gun. It creates a high-intensity, short-pulse electron beam by establishing a microwave electromagnetic field in the cavity of the electron gun to make the free electrons in the cavity form a resonance multiplication. This kind of microwave electron gun is called a micropulse electron gun because of its self-bunching characteristic, which makes the output micropulse length much shorter than the microwave radio frequency period (up to ps level). Compared with other microwave electron guns, this micropulse electron gun has the advantages of no need for external excitation, short pulse, high current intensity, and no fear of poisoning, making it suitable fo...

Claims

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Application Information

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IPC IPC(8): H01J43/06H01J43/28
Inventor 鲁向阳周奎全胜文杨柳赵继飞罗星杨自钦
Owner PEKING UNIV
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