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Electron gun and gyrotron

A technology of electron gun and heater, which is applied in the direction of time-of-flight electron tubes, discharge tubes, and electron/ion guns of time-of-flight electron tubes. It can solve the problems of smaller cathode size, difficult installation, and complex structure, etc. Improved shielding effect, improved thermal insulation performance, and simple installation process

Active Publication Date: 2018-01-23
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

For traditional electron guns, as the operating frequency increases, the size of the cathode used in the gyrotron becomes smaller, making its structure complex and difficult to install. There is an urgent need for an electron gun with simple and reliable assembly and high heating efficiency in this field.

Method used

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  • Electron gun and gyrotron
  • Electron gun and gyrotron
  • Electron gun and gyrotron

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0041] Such as figure 1 As shown, the electron gun of the embodiment of the present invention is suitable for a gyrotron, which includes a heat insulating cylinder 60, a compression ring 20, a heat insulating sheet 30, a heater 40, a cathode 50 and a focusing electrode 10; wherein,

[0042] The cathode 50 is arranged at one end of the focusing pole, and the other end of the focusing pole is fixedly connected with one end of the heat-insulating cylinder. The heater 40, the heat-shielding sheet 30 and the pressing ring 20 are sequentially arranged on the focusing pole 10 inside the heat-insulating cylinder. The tight ring 20 is fixedly connected with the focusing electrode 10 and presses the heater 40 through the heat insul...

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Abstract

The invention provides an electron gun which comprises a heat-insulating tube, a pressing ring, a heat-insulating sheet, a heater, a cathode and a focusing electrode. The cathode of the electron gun is in an annular convex structure. The focusing electrode is in an integrated structure. The cathode is nested on the focusing electrode, which ensures the concentricity of the cathode and the focusingelectrode. The focusing electrode and the cathode are laser welded, so that the focusing electrode and the cathode are firmly and reliably connected.

Description

technical field [0001] The invention relates to the technical field of microwave vacuum devices, in particular to an electron gun and a gyrotron. Background technique [0002] The gyrotron developed based on the principle of the electronic gyrotron maser can generate high-power electromagnetic radiation in the millimeter wave and terahertz bands, and can be widely used in plasma heating, advanced radar, particle acceleration, material processing, and space debris detection. The electron gun is the core component of the gyrotron, which provides the electron beam for energy exchange. An electron gun assembly with excellent performance must not only meet the current emission requirements of the entire tube, but also the entire assembly must be simple and reliable to assemble, with low power consumption by the heater. The lifespan is long enough. [0003] The electron gun assembly mainly includes the cathode, the heater used to heat the cathode to the working temperature, the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J23/06H01J25/00
Inventor 徐寿喜顾伟刘高峰耿志辉候筱琬
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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