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Graphene serving as cathode of X-ray tube and X-ray tube thereof

An X-ray tube and graphene technology, applied in the directions of X-ray tube electrodes, X-ray tubes, X-ray tube parts, etc., can solve the problem of large X-ray tube radiation dose, low X-ray tube conversion efficiency and unstable stability. Good and other problems, to achieve the effect of strong emission capability, excellent electron field emission capability, and easy focusing

Active Publication Date: 2013-07-24
CHONGQING XINHE QIYUE TECH CO LTD
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Problems solved by technology

[0007] In view of the above-mentioned deficiencies in existing X-ray tubes, the present invention solves the problem of large radiation dose of X-ray tubes, and the problems of low conversion efficiency, poor stability, and short life of existing X-ray tubes, and provides graphene as the X-ray tube. The cathode is the source of electron emission

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  • Graphene serving as cathode of X-ray tube and X-ray tube thereof
  • Graphene serving as cathode of X-ray tube and X-ray tube thereof
  • Graphene serving as cathode of X-ray tube and X-ray tube thereof

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Embodiment Construction

[0027] The high-efficiency graphene cathode field emission X-ray tube of the present invention will be further described in detail in conjunction with the accompanying drawings and the specific assembly process and working principle

[0028] The high-efficiency graphene cathode field emission X-ray tube of the present invention uses the characteristics of the good field emission performance of the graphene cathode, fixes the graphene cathode as an electron emission source in the cathode assembly and seals the vacuum glass tube together with the anode assembly In 1, the graphene emits electrons through the high voltage between the anode and the cathode, and the electrons are focused on the cathode cover and the high voltage of the anode bombards the anode target in a certain direction at high speed to generate X-rays. The emission threshold of the graphene cathode is less than 0.40 V / μm, and the highest withstand voltage is greater than 150KV;

[0029] Such as figure 1 As sho...

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Abstract

The invention discloses graphene serving as a cathode of an X-ray tube and an efficient graphene cathode field X-ray tube. The efficient graphene cathode field X-ray tube comprises a cathode assembly, an anode assembly and a vacuum glass tube, wherein the cathode assembly comprises a graphene cathode. The efficient graphene cathode field X-ray tube has the characteristics of high conversion efficiency, less scattered rays, reduced radiation dosage born by a human body in the fields of medical and security check and the like, easy implementation of micro-focus X-ray tube, strong transmitting capacity and high voltage resistance, and can be applied to the fields of semi-conductor detection, industrial flaw detection and the like. The efficient graphene cathode field X-ray tube is good in controllability, free from a heating cathode and instantaneous to transmit, and the number of electronic emissions is controlled by adjusting the grid voltage, so that the tube current is controlled. The efficient graphene cathode field X-ray tube further has the characteristics of good stability and long service life.

Description

technical field [0001] The invention relates to graphene as an X-ray tube cathode, in particular to a high-efficiency graphene cathode field emission X-ray tube. [0002] Background technique [0003] X-ray tube is a device mainly used for medical diagnosis and treatment, and for non-destructive testing, structural analysis, spectral analysis and film exposure of materials in industrial technology. X-rays are harmful to the human body, and effective protective measures must be taken when using them. [0004] An X-ray tube is a vacuum electronic device that uses high-speed electrons to strike a metal target surface to generate X-rays. Traditional X-ray tubes generally use thermionic emission cathodes to heat tungsten, lanthanum hexaboride and other materials to a high enough temperature, so that a part of electrons with high kinetic energy overcome the surface barrier of the object and escape from the body, forming plasma around the material. When an external electric fiel...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J35/06
CPCH01J35/065H01J35/08
Inventor 李葵阳
Owner CHONGQING XINHE QIYUE TECH CO LTD
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