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New X ray tube, and fabricating method

An X-ray tube and X-ray technology, applied in the field of new X-ray tubes, can solve problems such as increasing system complexity, reducing X-ray flux utilization, and large distance from source to detector

Inactive Publication Date: 2007-02-21
SHENZHEN UNIV
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Problems solved by technology

However, the disadvantage of the F.Pfeiffer method is that the effective field of view of X-rays is limited and cannot be made very large; due to the increase of the source grating, the utilization rate of the X-ray flux is greatly reduced; the source grating is a kind of absorption grating, which requires It is very difficult to fabricate a sufficiently thick grating with a high-Z material; finally, the use of a source grating will increase the complexity of the system, making the distance from the source to the detector larger

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  • New X ray tube, and fabricating method
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  • New X ray tube, and fabricating method

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[0030] The second example of the present invention: electron beam scanning X-ray tube

[0031] An electron beam scanning X-ray tube consists of an electron emitter, a grid, a focusing electrode, a deflection yoke, and a conventional unstructured anode (Fig. 7). The electron emitter (7-1) produces a small spot electron beam (7-5) under the control of the power supply and control system (7-8), which is accelerated by the grid (7-2) and focused by the focusing electrode before entering the deflection yoke (7-3A, 7-3B are horizontal deflection and vertical deflection respectively). The deflection system enables the small beam spot electron beam to scan quickly in two dimensions on the anode (7-6). The distribution of the electron beam on the anode forms a parallel line structure whose line width is the diameter of the beam spot. The scanning range is the X-ray beam line The effective area of ​​the emitter array. At any moment in the scanning process, only one point on the anode ...

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Abstract

New type X ray tube is capable of generating X beam of rays with high spatial coherence, large dose, and large emission angle. Anode in extended electron beam or ion beam bomb structure, or structured electron beam or non-structured ion beam bomb is adopted in the invention to generate parallel-arranged linear array of emitter of X ray. Modes in structured electron or ion beam emitter, or structured grid, or electron or ion beam scan are adopted to realize emitter of X ray. Parallel-arranged periodic structure composed of high Z metal strips with narrow enough line width is adopted for structured anode. The disclosed X ray tube is workable under mode of continuous operation, or mode of pulse operation; and capable of outputting hard X ray or soft X ray. The invention is applicable to fundamental research in areas of biology, medical science, and material science etc. or in use for areas of disease diagnosis, industrial non-destructive inspection, online test etc.

Description

technical field [0001] The invention relates to a new type of X-ray tube, which uses a structured anode, or a structured electron beam or ion beam, or a structured emitter method to provide an X-ray beam with excellent spatial coherence, large dose, and wide emission angle, which can be used in X-ray tubes. Radiation phase contrast imaging and cone beam X-ray phase contrast CT can also be used in occasions that require high spatial coherence and dose of X-ray beams at the same time. Background technique [0002] Most of the most used X-ray sources in routine medical diagnosis and industrial non-destructive testing are based on the bombardment of metal anode targets by electron beams or ion beams. These X-ray sources mainly include electron emitters, focusing systems and anode targets in structure. The generated X-ray dose is large, the X-ray beam spot is also large, and its transverse coherence length is very small, almost negligible, so it does not have spatial coherence. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J35/00H01J35/08H01J35/06H01J35/14H05G1/00
CPCG21K2207/005H01J2235/086
Inventor 牛憨笨郭金川王凯歌杨勤劳
Owner SHENZHEN UNIV
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