Grid-control cold cathode X-ray tube

An X-ray tube and cold cathode technology, which is applied in the field of X-ray tubes, can solve the problems of complex ray tube assembly process, many electrons intercepted by the grid, and difficulty in realizing a small focus, and achieves low cost, small focus, and prevention of inter-electrode strikes. fire effect
CN103413745AInactive Publication Date: 2013-11-27南京康众光电科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
南京康众光电科技有限公司
Publication Date
2013-11-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a grid-control cold cathode X-ray tube which comprises a vacuum cavity, an anode assembly, a grid-control electrode and a cathode assembly. The anode assembly comprises an anode target, an anode metal hood and an anode connection pillar. The anode target, the anode metal hood and the cathode assembly are packaged in the vacuum cavity. The anode target is embedded in the anode metal hood and used for producing X rays. The normal line of a plane of the anode target is connected with an anode and a cathode to form an inclination angle which is (12+ / -1) degrees. The cathode assembly comprises a cathode substrate and a cathode material which is arranged on the cathode substrate. The cathode hood serving as the grid-control electrode covers a cathode installation part which comprises a cathode lead and a grid lead. The cathode hood is made of metal. A hole is formed in the cathode hood and located in the connection line of the cathode substrate and the anode target. High voltage is led in through the anode connection pillar. The cathode hood serving as the grid-control electrode is connected with the grid lead. The cathode substrate is connected with the cathode lead. Voltage is exerted between two electrodes led out from the grid lead and the cathode lead.
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Description

technical field

[0001] The invention relates to an X-ray tube, in particular to a gate-controlled cold-cathode X-ray tube and its assembly method. technical background

[0002] An X-ray tube is a device that allows the controlled emission of X-rays. They are used in various systems, for example, X-ray imaging technology in medical, industrial and security fields, spectral analysis (X-ray fluorescence spectroscopy, X-ray photoelectron spectroscopy), X-ray diffraction analysis, etc. The principle of generating X-rays in a ray tube is to use high-energy electrons (tens of thousands of electron volts) to bombard a metal target. The interaction between these electrons and the target is multiplied until X-rays are emitted. The X-ray intensity is directly proportional to the electron flow on the target material. The penetration of X-rays is directly proportional to the applied voltage on the target material. The emission area of ​​X-rays is determined by the range of electron b...

Claims

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