CN102647849A - Electron linear accelerator having dual purposes and dual-purpose method of electron linear accelerator - Google Patents
Electron linear accelerator having dual purposes and dual-purpose method of electron linear accelerator Download PDFInfo
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- CN102647849A CN102647849A CN2012101369122A CN201210136912A CN102647849A CN 102647849 A CN102647849 A CN 102647849A CN 2012101369122 A CN2012101369122 A CN 2012101369122A CN 201210136912 A CN201210136912 A CN 201210136912A CN 102647849 A CN102647849 A CN 102647849A
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Abstract
Disclosed is an electron linear accelerator having dual purposes and a dual-purpose method of the electron linear accelerator. The electron linear accelerator comprises an accelerating tube, a scanning box, an industrial computed tomography (CT) and a beam deflection system, wherein the beam deflection system comprises a front quadrupole magnet, a deflection magnet, a rear quadrupole magnet and a scanning magnet; the front quadrupole magnet is arranged behind the accelerating tube, the deflection magnet is arranged behind the front quadrupole magnet, and the rear quadrupole magnet and the scanning magnet are arranged behind the deflection magnet; the industrial CT is arranged behind the rear quadrupole magnet and the scanning box is arranged behind the scanning magnet; and the deflection magnet is controlled to be opened or closed, and electronic beam current is selected for moving forwards in a linear mode or for deflecting at an alpha angle, so that the electronic beam current selectively enters the scanning box or the industrial CT. The electron linear accelerator having dual purposes and the dual-purpose method of the electron linear accelerator solve the problem that the requirements of dual purposes on electron beam spot sizes are contradictory. Under the condition that all performances meet the requirements, the cost is reduced. The electron linear accelerator having dual purposes and the dual-purpose method of the electron linear accelerator not only perform electron beam irradiation by using different energy but also generate X rays with different energy, and perform CT imaging.
Description
Technical field
What the present invention relates to is a kind of electron accelerator.The present invention also relates to a kind of application process of electron linear accelerator.
Background technology
At present, in the application of electron linear accelerator, every accelerator generally all can only be realized a kind of function, or electron irradiation, or x-ray imaging.Electron irradiation plays an important role in fields such as material modification, radiation sterilization, food fresh keepings, and x-ray imaging is being brought into play irreplaceable effect in fields such as Non-Destructive Testing, medical diagnosis and safety checks.When using the electron beam irradiation article, beam spot requires relatively large, and line is more even, through the effect and the article transport tape of scanning magnet, can realize the scanning to article.When using x-ray imaging, in order to reach higher spatial resolution and image definition, require the electronic beam current good condensing performance, the x-ray focus size of the generation of practicing shooting is little, can meet the demands just be used for the quality of x-ray imaging like this.To the conflicting requirement of beam spot size, electron linear accelerator all only adopts an accelerating tube to realize a kind of production model of function based on above-mentioned two kinds of application, and performance can meet the demands.But, need realize the user under the situation of electron irradiation and two kinds of application of radial imaging that if use above-mentioned accelerator Application Design, the user just needs to buy the accelerator facility of two platform independent, to realize different functions respectively, this will increase cost greatly.
In recent years, in the medical imaging field, realized the electron accelerator that energy is adjustable, and can use the electron beam of different-energy to realize different functions, still, the use of sort accelerator is also very limited, as yet large-scale promotion not.
Summary of the invention
The object of the present invention is to provide a kind of dual-use electron linear accelerator that under the situation that various performances all meet the demands, can practice thrift cost.The present invention also aims to provide a kind of dual-use method of electron linear accelerator.
The objective of the invention is to realize like this:
Dual-use electron linear accelerator of the present invention comprises accelerating tube 1, scan box 3, industry CT 5, also comprises the beam bending system; Said beam bending system comprises the preceding quadrupole magnet 6 that is positioned at behind the accelerating tube 1, be positioned at before behind the quadrupole magnet 6 deflecting magnet 2, be positioned at back quadrupole magnet 7 and scanning magnet behind the deflecting magnet 2; Industry CT 5 is positioned at after the quadrupole magnet 7 of back, and scan box 3 is positioned at after the scanning magnet; Unlatching through control deflecting magnet 2 or close is selected the electronic beam current straight line to travel forward or is realized α angular deflection, thereby selects to get into scan box 3 or industry CT 5.
Dual-use electron linear accelerator of the present invention can also comprise:
Said accelerating tube 1 vertically is provided with, and preceding quadrupole magnet 6, scanning magnet and scan box 3 are vertically arranged.
Said accelerating tube 1 is horizontally disposed with, preceding quadrupole magnet 6, back quadrupole magnet 7 and industry CT 5 horizontal arrangement.
The dual-use method of a kind of electron linear accelerator of the present invention is:
Electron beam is provided by electron gun; In accelerating tube 1, interact and the acquisition energy with rf electric field, the electron beam that is come out by accelerating tube gets into deflecting magnet 2 through preceding quadrupole magnet 6 focusing, if deflecting magnet 2 is closed; Then accelerator is operated in the electron irradiation pattern; The electronic beam current straight line travels forward and gets into scan box 3, and scanning magnet becomes the electronics curtain with electron beam scanning, illuminated object 4 is carried out irradiation after passing the titanium window; If deflecting magnet 2 is opened, then accelerator is operated in the industry CT pattern, and electron beam receives the deflection electromagnetic field effect, realizes α angular deflection, and afterwards through quadrupole magnet 7 focusing later, practicing shooting produces little target spot X ray, gets into industry CT 5 imagings.
The dual-use method of another kind of electron linear accelerator of the present invention is:
Electron beam level in accelerating tube 1 acquisition energy that advances focuses on through preceding quadrupole lens 6 and to get into deflecting magnets 2, when deflecting magnet 2 is closed; Accelerator is operated in the industry CT pattern; The electron beam straight line advances, and after quadrupole lens 7 focuses on later, practicing shooting produces X ray, gets into industry CT 5 imagings; When deflecting magnet 2 was opened, accelerator was operated in the electron irradiation pattern, and electron beam focuses on the back and gets into scan box 3 through α angular deflection, under the effect of scanning magnet, photographed object article 4 is realized irradiation.
The present invention designs a kind of beam bending system, and the chromatic dispersion of control line makes two kinds of functions of electron irradiation and industry CT through same electron accelerator realization, and can realize that beam energy is adjustable continuously.
The design adopts radio frequency accelerating tube structure that electronics is quickened; Vertically place; Electron beam is provided by electron gun; In accelerating tube, interact and the acquisition energy, can make electron beam obtain different energy by force through regulating microwave power and electron gun emission stream with rf electric field, adjustable at 10MeV with interior realization stepping.The beam bending system realizes the deflection of electronic beam current, and it still is " industry CT " pattern that the decision accelerator is operated in " electron irradiation ", the switching of two kinds of functions of control.Deflection angle artificially limits according to actual needs, such as can two 90 ° of deflection systems that 45 ° of deflecting magnets are formed, also can be 270 ° of deflection systems, or the like.
The beam bending system mainly is made up of deflecting magnet, and the effect that except the deflection that realizes electronic beam current, also will loose and focus on the colour killing of electron beam air flue all will have deflection focusing effect preferably for the electronic beam current of different-energy.Electron beam deflecting energy collimation adopts quadrupole magnet and deflecting magnet to form, and preceding two blocks of quadrupole magnets are vertically arranged, and are positioned at the place ahead of deflecting magnet; The electron beam that accelerating tube is come out focuses on, and is deflecting magnet afterwards, and middle some quadrupole magnet along continuous straight runs are arranged; Be used for the line of deflection is tentatively focused on; Last several piece quadrupole magnet is positioned at the place ahead of CT target, is used for halved tie stream and further focuses on, thereby obtain littler focus.
The electron beam that is come out by accelerating tube focuses on the entering deflecting magnet through quadrupole magnet; If deflecting magnet is closed; Then accelerator is operated in " electron irradiation " pattern; The line straight line entering scan box that travels forward, scanning magnet becomes the electronics curtain with electron beam scanning, illuminated object is carried out irradiation after passing the titanium window; If deflecting magnet is opened, then accelerator is operated in " industry CT " pattern, and electron beam receives the deflection electromagnetic field effect, realizes certain angle deflection, focuses on through quadrupole magnet afterwards, practices shooting to produce little target spot X ray, realizes the CT imaging.
The principle of vertical accelerator for sleeping in is the same with stand-type accelerator, utilizes the microwave electromagnetic field accelerated electron, and regulates the energy of electronic beam current through regulating microwave power and electron gun emission current, makes it adjustable with interior stepping at 10MeV.The deflection system of vertical accelerator for sleeping in also is made up of deflecting magnet and the diffusing member of colour killing, and can set deflection angle as required.Electron beam level in accelerating tube acquisition energy that advances focuses on through quadrupole lens and to get into deflecting magnet, and when deflecting magnet was closed, accelerator was operated in " industry CT " pattern, and the electron beam straight line advances, and focuses on the back and practices shooting and produce X ray, gets into the CT system imaging; When deflecting magnet was opened, accelerator was operated in " electron irradiation " pattern, and electron beam focuses on the back and gets into scan box through certain angle deflection, under the effect of scanning magnet, the photographed object article is realized irradiation.
The present invention has realized on same accelerating tube, can using respectively electron irradiation and two kinds of functions of x-ray imaging; Solved the contradictory problems of two kinds of functions to the beam spot size requirements; Under the situation that various performances all meet the demands, practiced thrift cost, realized " dual-use ".The present invention has widened the application of the adjustable electron accelerator of energy, can either carry out electron beam irradiation with different energy, can produce the X ray of different-energy again, carries out the CT imaging.
Description of drawings
Fig. 1 is the structural representation of stand-type dual-use electron linear accelerator.
Fig. 2 is the structural representation of vertical dual-use electron linear accelerator for sleeping in.
Embodiment
For example the present invention is made more detailed description below:
Embodiment one
In conjunction with Fig. 1, the structure of stand-type dual-use electron linear accelerator is: comprise accelerating tube 1, scan box 3, industry CT 5, also comprise the beam bending system; The beam bending system comprises the preceding quadrupole magnet 6 that is positioned at behind the accelerating tube 1, be positioned at before behind the quadrupole magnet 6 deflecting magnet 2, be positioned at back quadrupole magnet 7 and scanning magnet behind the deflecting magnet 2; Industry CT 5 is positioned at after the quadrupole magnet 7 of back, and scan box 3 is positioned at after the scanning magnet; Accelerating tube 1 vertically is provided with, and preceding quadrupole magnet 6, scanning magnet and scan box 3 are vertically arranged.
Electron beam is provided by electron gun; In accelerating tube 1, interact and the acquisition energy with rf electric field, 6 focusing get into deflecting magnet 2 to the electron beam that is come out by accelerating tube through quadrupole magnet, if deflecting magnet 2 is closed; Then accelerator is operated in " electron irradiation " pattern; The line straight line travels forward and gets into scan box 3, and scanning magnet becomes the electronics curtain with electron beam scanning, illuminated object 4 is carried out irradiation after passing the titanium window; If deflecting magnet 2 is opened, then accelerator is operated in " industry CT " pattern, and electron beam receives the deflection electromagnetic field effect, realizes α angular deflection, focuses on through quadrupole magnet 7 afterwards, and practicing shooting produces little target spot X ray, gets into 5 imagings of CT system.
Embodiment two
In conjunction with Fig. 2, the structure of the vertical dual-use electron linear accelerator that crouches is: comprise accelerating tube 1, scan box 3, industry CT 5, also comprise the beam bending system; The beam bending system comprises the preceding quadrupole magnet 6 that is positioned at behind the accelerating tube 1, be positioned at before behind the quadrupole magnet 6 deflecting magnet 2, be positioned at back quadrupole magnet 7 and scanning magnet behind the deflecting magnet 2; Industry CT 5 is positioned at after the quadrupole magnet 7 of back, and scan box 3 is positioned at after the scanning magnet; Accelerating tube 1 is horizontally disposed with, preceding quadrupole magnet 6, back quadrupole magnet 7 and industry CT 5 horizontal arrangement.
Electron beam level in accelerating tube 1 acquisition energy that advances focuses on through quadrupole lens 6 and to get into deflecting magnets 2, when deflecting magnet 2 is closed; Accelerator is operated in " industry CT " pattern; The electron beam straight line advances, and focuses on the back target practice through quadrupole lens 7 and produces X ray, gets into 5 imagings of CT system; When deflecting magnet 2 was opened, accelerator was operated in " electron irradiation " pattern, and electron beam focuses on the back and gets into scan box 3 through α angular deflection, under the effect of scanning magnet, photographed object article 4 is realized irradiation.
Claims (5)
1. dual-use electron linear accelerator; Comprise accelerating tube [1], scan box [3], industry CT [5]; It is characterized in that: also comprise the beam bending system, said beam bending system comprises the preceding quadrupole magnet [6] that is positioned at behind the accelerating tube [1], be positioned at deflecting magnet [2] behind the preceding quadrupole magnet [6], be positioned at back quadrupole magnet [7] and scanning magnet behind the deflecting magnet [2]; Industry CT [5] is positioned at back quadrupole magnet [7] afterwards, and scan box [3] is positioned at after the scanning magnet; Unlatching through control deflecting magnet [2] or close is selected the electronic beam current straight line to travel forward or is realized α angular deflection, thereby selects to get into scan box [3] or industry CT [5].
2. dual-use electron linear accelerator according to claim 1 is characterized in that: said accelerating tube [1] is vertical to be provided with, and preceding quadrupole magnet [6], scanning magnet and scan box [3] are vertical arranges.
3. dual-use electron linear accelerator according to claim 1 is characterized in that: said accelerating tube [1] is horizontally disposed with, preceding quadrupole magnet [6], back quadrupole magnet [7] and industry CT [5] horizontal arrangement.
4. the dual-use method of an electron linear accelerator; It is characterized in that: electron beam is provided by electron gun; In accelerating tube [1], interact and the acquisition energy with rf electric field, focusing gets into deflecting magnet [2] to the electron beam that is come out by accelerating tube through preceding quadrupole magnet [6], if deflecting magnet [2] is closed; Then accelerator is operated in the electron irradiation pattern; The electronic beam current straight line travels forward and gets into scan box [3], and scanning magnet becomes the electronics curtain with electron beam scanning, illuminated object [4] is carried out irradiation after passing the titanium window; If deflecting magnet [2] is opened, then accelerator is operated in the industry CT pattern, and electron beam receives the deflection electromagnetic field effect, realizes α angular deflection, and afterwards through quadrupole magnet [7] focusing later, practicing shooting produces little target spot X ray, gets into industry CT [5] imaging.
5. the dual-use method of an electron linear accelerator; It is characterized in that: electron beam level in accelerating tube [1] acquisition energy that advances focuses on through preceding quadrupole lens [6] and to get into deflecting magnet [2], when deflecting magnet [2] when closing; Accelerator is operated in the industry CT pattern; The electron beam straight line advances, and after quadrupole lens [7] focuses on later, practicing shooting produces X ray, gets into industry CT [5] imaging; When deflecting magnet [2] when opening, accelerator is operated in the electron irradiation pattern, and electron beam focuses on the back and gets into scan box [3] through α angular deflection, under the effect of scanning magnet to photographed object article [4] realization irradiation.
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| CN2012101369122A CN102647849A (en) | 2012-05-04 | 2012-05-04 | Electron linear accelerator having dual purposes and dual-purpose method of electron linear accelerator |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105636331A (en) * | 2014-10-27 | 2016-06-01 | 上海联影医疗科技有限公司 | Electronic linear accelerator |
| CN106535457A (en) * | 2016-10-28 | 2017-03-22 | 中广核中科海维科技发展有限公司 | Back-bombardment-preventing electron linear accelerator |
| CN108696981A (en) * | 2018-05-31 | 2018-10-23 | 北京鑫智能技术股份有限公司 | A kind of α magnet for irradiation accelerator |
| CN109362169A (en) * | 2018-12-24 | 2019-02-19 | 中广核达胜加速器技术有限公司 | A kind of bearing conversion equipment of electron accelerator X-ray conversion target |
| WO2020191839A1 (en) * | 2019-03-27 | 2020-10-01 | 华中科技大学 | Electron radiation system |
| CN111885809A (en) * | 2020-06-30 | 2020-11-03 | 中国原子能科学研究院 | Wide-energy large-beam-spot electron accelerator |
| CN113840442A (en) * | 2021-09-22 | 2021-12-24 | 东华理工大学 | Electron beam shifting device for small-sized electron accelerator and control method thereof |
| CN114286492A (en) * | 2020-09-28 | 2022-04-05 | 西门子医疗有限公司 | Linear accelerator system with magnet unit for electron beam deflection |
| US11483919B2 (en) | 2019-03-27 | 2022-10-25 | Huazhong University Of Science And Technology | System of electron irradiation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105636331A (en) * | 2014-10-27 | 2016-06-01 | 上海联影医疗科技有限公司 | Electronic linear accelerator |
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| CN108696981A (en) * | 2018-05-31 | 2018-10-23 | 北京鑫智能技术股份有限公司 | A kind of α magnet for irradiation accelerator |
| CN109362169A (en) * | 2018-12-24 | 2019-02-19 | 中广核达胜加速器技术有限公司 | A kind of bearing conversion equipment of electron accelerator X-ray conversion target |
| WO2020191839A1 (en) * | 2019-03-27 | 2020-10-01 | 华中科技大学 | Electron radiation system |
| US11483919B2 (en) | 2019-03-27 | 2022-10-25 | Huazhong University Of Science And Technology | System of electron irradiation |
| CN111885809A (en) * | 2020-06-30 | 2020-11-03 | 中国原子能科学研究院 | Wide-energy large-beam-spot electron accelerator |
| CN114286492A (en) * | 2020-09-28 | 2022-04-05 | 西门子医疗有限公司 | Linear accelerator system with magnet unit for electron beam deflection |
| CN113840442A (en) * | 2021-09-22 | 2021-12-24 | 东华理工大学 | Electron beam shifting device for small-sized electron accelerator and control method thereof |
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Application publication date: 20120822 |