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Tripolar grid-controlled cold cathode X-ray tube

An X-ray tube and cold cathode technology, applied in the field of radiation research, can solve problems such as weak penetration of X-rays, weak electron focusing ability, and affecting work effects, and achieve good emission effects, easy control, and small focus.

Inactive Publication Date: 2020-12-01
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing triode cold-cathode X-ray tube technology has certain limitations, mainly in the following aspects: weak electron focusing ability; insufficient vacuum, which affects the working effect; X-ray penetrating power is not strong

Method used

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] like figure 1 As shown, the present invention provides a triode grid-controlled cold cathode X-ray tube, comprising an anode part 3, a cathode part 1 and a vacuum chamber 2, and the anode part 3 and the cathode part 1 are all arranged in the vacuum chamber 2 Inside; the cathode part 1 includes a cathode 12 and a grid 151; the potential difference between the cathode 12 and the grid 151 can adjust the anode target 321 of drawing electrons to bombard the anode part 3 to generate X-rays; the cathode 12 The material is a super-aligned carbon nanotube array.

[0028] The present invention uses super-arranged carbon nanotubes as the cathode material. Compared with ordinary arrays, the super-arranged carbon nanotube array of this material has straighter carbon nanotubes, more orderly arrangement, and excellent field emission performance and stability...

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Abstract

The invention relates to a tripolar grid-controlled cold cathode X-ray tube, which comprises an anode component, a cathode component and a vacuum cavity. The anode component and the cathode componentare arranged in the vacuum cavity. The cathode part comprises a cathode and a grid mesh. The potential difference between the cathode and the grid mesh can adjust and lead out electrons to bombard ananode target of the anode part to generate X-rays. The cathode is made of a super-aligned carbon nanotube array. The tripolar grid-controlled cold cathode X-ray tube has the following beneficial effects: the super-aligned carbon nanotubes are used as a cathode material, and compared with a common array, the super-aligned carbon nanotube array of the material has the advantages that the carbon nanotubes are straighter, are arranged more orderly, have excellent field emission performance and a stable structure, are easy to control as a field emitter, and achieve a better emission effect. The getter is added into the vacuum cavity, so that a relatively high vacuum degree can be kept. An electronic focusing function is achieved through the focusing groove and the focusing electrode, and a small focus can be achieved.

Description

technical field [0001] The invention belongs to the field of radiation research, and in particular relates to a triode grid-controlled cold cathode X-ray tube. Background technique [0002] Since the discovery that carbon nanotube materials have excellent field emission properties, researchers have carried out their application research as an electron source. These applications include microwave vacuum devices, display devices, terahertz vacuum devices, vacuum triodes and X-ray tubes. Compared with traditional hot-cathode X-ray tubes, cold-cathode X-ray tubes have the advantages of short response time, long life, small focus and low energy consumption. [0003] In recent years, research on cold cathode X-ray tubes based on carbon nanotube technology has gradually become a hot topic. Japan's Sugie et al. first published an article using carbon nanotubes as a field emission cathode X-ray tube. And use the ray tube and the hot cathode ray tube to compare the X-ray imaging of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J35/06H01J35/24
CPCH01J35/06H01J35/24
Inventor 张国光唐利华
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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