CN105118761A - Secondary electron bombardment shielding method for X-ray tubes - Google Patents
Secondary electron bombardment shielding method for X-ray tubes Download PDFInfo
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- CN105118761A CN105118761A CN201510585352.2A CN201510585352A CN105118761A CN 105118761 A CN105118761 A CN 105118761A CN 201510585352 A CN201510585352 A CN 201510585352A CN 105118761 A CN105118761 A CN 105118761A
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- ceramic structure
- secondary electron
- sealing surface
- ray tubes
- bombardment
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Abstract
The invention discloses a secondary electron bombardment shielding method for X-ray tubes. The method comprises the concrete steps of designing a ceramic structure in a stepped necking-down shape, hiding a sealing surface in a slit between the ceramic structure and a metal part to protect the sealing surface from the secondary electron bombardment, completely hiding the sealing surface in an entirely shielding type external packaging structure, and adding an oxygen-free copper shielding ring on the end surface of the ceramic structure. According to the technical scheme of the invention, the sealing structure for X-ray tubes is reasonably designed. Meanwhile, the ceramic structure is shielded and uniformly pressed, so that secondary electrons and scattering electrons are effectively shielded. Moreover, the bombardment and the attachment of electrons on the sealing surface and the ceramic structure are reduced during operation. The air leak rate of X-ray tubes is reduced, and the insulating strength is improved. Therefore, X-ray tubes are ensured to work reliably and stably.
Description
Technical field
The present invention relates to high-energy physics technical field, specifically a kind of method shielding the X-ray tube of secondary electron bombardment.
Background technology
During X-ray tube work, anode tungsten target, while the bombardment of bearing high-velocity electrons produces X-ray, inevitably can produce secondary electron simultaneously.The emission type of secondary electron can be divided into the electronics bombardment induced conductivity type of reflection-type, porjection type and insulator.Operationally, the metal of bulb portion and insulator will bear the bombardment of scattered electron under action of high voltage to X-ray tube, have the bombardment of the secondary electron ejected from anode simultaneously.If the bombardment of these electronics is to pottery and the sealing surface of metal, the temperature rise of the solder as welding ceramics and metal material carrier can be caused, when temperature rise is serious, can gas leakage be produced.Electronics attachment on the ceramic material can reduce the dielectric strength of pottery, excites flicker in pipe, has a strong impact on the steady operation of ray tube.
Summary of the invention
The object of the present invention is to provide a kind ofly reduce leak rate, the method for X-ray tube of the shielding secondary electron bombardment that improves dielectric strength, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
Shield a method for the X-ray tube of secondary electron bombardment, concrete steps are as follows:
1) ceramic structure is carried out the reducing design of step, sealing surface is hidden in the slit between ceramic structure and metal parts, avoids the bombardment of secondary electron;
2) in sealing-in mode, take the outer seal configuration of complete protected type, sealing surface is stashed completely;
3) on the end face of ceramic structure, an oxygen-free copper shading ring is increased.
As the present invention's further scheme: described oxygen-free copper shielding replaces between ceramic structure and metal parts.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is by carrying out appropriate design to the sealing structure of X-ray tube, ceramic structure blocked simultaneously and be all installed with meter, secondary electron and scattered electron are effectively shielded, the bombardment of duplet sealing surface and ceramic structure and attachment during minimizing work, reduce the leak rate of ray tube, improve dielectric strength, ensure that ray tube works reliable and stablely.
Accompanying drawing explanation
Fig. 1 is the structural representation adopting the improved X-ray tube of the present invention.
Fig. 2 is the structural representation at A place in Fig. 1.
Fig. 3 is the structural representation at B place in Fig. 1.
Embodiment
Be described in more detail below in conjunction with the technical scheme of embodiment to this patent.
Refer to Fig. 1-3, a kind of method shielding the X-ray tube of secondary electron bombardment, concrete steps are as follows:
1) ceramic structure 1 is carried out the reducing design of step, sealing surface 2 is hidden in the slit between ceramic structure 1 and metal parts 3, avoids the bombardment of secondary electron;
2) in sealing-in mode, take the outer seal configuration of complete protected type, sealing surface 2 is stashed completely;
3) on the end face of ceramic structure 1, increase an oxygen-free copper shading ring 4, oxygen-free copper shielding changes 4 between ceramic structure 1 and metal parts 3, avoid scattered electron and secondary electron directly to bombard and be attached to ceramic insulator surface on the one hand, electric field on the other hand balanced pipe, avoids the distortion of electric field.
The present invention is by adopting the structural design of shielding secondary electron bombardment, the homogeneous tube leak rate of ray tube drops to 0.5% by 12%, by doing electromagnetic field analysis to the electronics pipe of new construction, the uniformity of the Electric Field Distribution of new pipe increases, local field strength weakens, this is very beneficial for ray tube and reduces under high voltages and puncture, stable work.
The present invention is by carrying out appropriate design to the sealing structure of X-ray tube, ceramic structure 1 blocked simultaneously and be all installed with meter, secondary electron and scattered electron are effectively shielded, the bombardment of duplet sealing surface 2 and ceramic structure 1 and attachment during minimizing work, reduce the leak rate of ray tube, improve dielectric strength, ensure that ray tube works reliable and stablely.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned execution mode, in the ken that one skilled in the relevant art possesses, various change can also be made under the prerequisite not departing from this patent aim.
Claims (2)
1. shield a method for the X-ray tube of secondary electron bombardment, it is characterized in that, concrete steps are as follows:
1) ceramic structure (1) is carried out the reducing design of step, sealing surface (2) is hidden in the slit between ceramic structure (1) and metal parts (3), avoids the bombardment of secondary electron;
2) in sealing-in mode, take the outer seal configuration of complete protected type, sealing surface (2) is stashed completely;
3) on the end face of ceramic structure (1), an oxygen-free copper shading ring (4) is increased.
2. the method for the X-ray tube of shielding secondary electron bombardment according to claim 1, is characterized in that, described oxygen-free copper shielding is changed (4) and is positioned between ceramic structure (1) and metal parts (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510585352.2A CN105118761B (en) | 2015-09-16 | 2015-09-16 | A kind of preparation method for the X-ray tube for shielding secondary electron bombardment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510585352.2A CN105118761B (en) | 2015-09-16 | 2015-09-16 | A kind of preparation method for the X-ray tube for shielding secondary electron bombardment |
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| CN105118761A true CN105118761A (en) | 2015-12-02 |
| CN105118761B CN105118761B (en) | 2017-08-25 |
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| CN201510585352.2A Active CN105118761B (en) | 2015-09-16 | 2015-09-16 | A kind of preparation method for the X-ray tube for shielding secondary electron bombardment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111554556A (en) * | 2020-05-18 | 2020-08-18 | 上海联影医疗科技有限公司 | X-ray tube and medical imaging apparatus |
| CN116741607A (en) * | 2023-07-20 | 2023-09-12 | 上海超群检测科技股份有限公司 | Anti-sparking cathode assembly and X-ray tube |
| EP4060713A4 (en) * | 2019-11-11 | 2023-12-13 | Canon Electron Tubes & Devices Co., Ltd. | X-ray tube and method for manufacturing x-ray tube |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3866075A (en) * | 1974-05-09 | 1975-02-11 | Atomic Energy Commission | Vacuum type trigger discharge tube with cup shaped anode |
| JP2008077914A (en) * | 2006-09-20 | 2008-04-03 | Hitachi Medical Corp | X-ray tube |
| CN201378580Y (en) * | 2009-03-26 | 2010-01-06 | 公安部第一研究所 | Gate-controlled carbon nano-cathode field emission X-ray tube |
| CN202996766U (en) * | 2012-09-25 | 2013-06-12 | 王建军 | Environment-friendly high-speed microfocus breast X-ray tube |
| CN103794449A (en) * | 2014-03-06 | 2014-05-14 | 中国科学院电子学研究所 | Electronic beam axial velocity measurement system |
| CN104889519A (en) * | 2015-04-24 | 2015-09-09 | 黄石上方检测设备有限公司 | Highly-efficient, energy-saving and environmentally-friendly manufacturing method of metal ceramic X ray tube |
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2015
- 2015-09-16 CN CN201510585352.2A patent/CN105118761B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3866075A (en) * | 1974-05-09 | 1975-02-11 | Atomic Energy Commission | Vacuum type trigger discharge tube with cup shaped anode |
| JP2008077914A (en) * | 2006-09-20 | 2008-04-03 | Hitachi Medical Corp | X-ray tube |
| CN201378580Y (en) * | 2009-03-26 | 2010-01-06 | 公安部第一研究所 | Gate-controlled carbon nano-cathode field emission X-ray tube |
| CN202996766U (en) * | 2012-09-25 | 2013-06-12 | 王建军 | Environment-friendly high-speed microfocus breast X-ray tube |
| CN103794449A (en) * | 2014-03-06 | 2014-05-14 | 中国科学院电子学研究所 | Electronic beam axial velocity measurement system |
| CN104889519A (en) * | 2015-04-24 | 2015-09-09 | 黄石上方检测设备有限公司 | Highly-efficient, energy-saving and environmentally-friendly manufacturing method of metal ceramic X ray tube |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4060713A4 (en) * | 2019-11-11 | 2023-12-13 | Canon Electron Tubes & Devices Co., Ltd. | X-ray tube and method for manufacturing x-ray tube |
| CN111554556A (en) * | 2020-05-18 | 2020-08-18 | 上海联影医疗科技有限公司 | X-ray tube and medical imaging apparatus |
| CN111554556B (en) * | 2020-05-18 | 2023-06-27 | 上海联影医疗科技股份有限公司 | X-ray tube and medical imaging apparatus |
| CN116741607A (en) * | 2023-07-20 | 2023-09-12 | 上海超群检测科技股份有限公司 | Anti-sparking cathode assembly and X-ray tube |
| CN116741607B (en) * | 2023-07-20 | 2024-01-30 | 上海超群检测科技股份有限公司 | Anti-sparking cathode assembly and X-ray tube |
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| CN105118761B (en) | 2017-08-25 |
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Effective date of registration: 20211221 Address after: 610000 floor 1, building 3, No. 99, Huanghe Road, Xindu street, Xindu District, Chengdu, Sichuan Patentee after: Chengdu kaisaier Technology Co.,Ltd. Address before: No. 99, Huanghe Road, East Industrial Zone, Xindu District, Chengdu, Sichuan 610000 Patentee before: CHENGDU KAISAIER ELECTRONICS Co.,Ltd. |
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