CN202634872U - 6MeV single-photon medical low-energy standing wave accelerating tube - Google Patents
6MeV single-photon medical low-energy standing wave accelerating tube Download PDFInfo
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- CN202634872U CN202634872U CN 201220258527 CN201220258527U CN202634872U CN 202634872 U CN202634872 U CN 202634872U CN 201220258527 CN201220258527 CN 201220258527 CN 201220258527 U CN201220258527 U CN 201220258527U CN 202634872 U CN202634872 U CN 202634872U
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Abstract
The utility model provides a 6MeV single-photon medical low-energy standing wave accelerating tube, which comprises a cavity chain body, wherein both ends of the cavity chain body are connected with an electron gun and a target respectively; the side surface of the cavity chain body is fixedly connected with a rectangular waveguide fixedly connected with a microwave input window and a sputtering-ion pump; the electron gun is a grid-control tripolar electron gun; and compared with a dipolar electron gun, a grid polar is arranged on the grid-control tripolar electron gun, and the grid polar can be used for controlling beam currents well and performing fine tuning on X-ray dosis rates and energy, so that electron beam currents can reach a stable state instantly and fast shot the target to generate X-rays. The cavity chain body is an accelerating cavity chain comprising 6 to 7 accelerating cavities and coupling cavities, and the beam current apertures of the cavities are 4-6 mm; and the length of the cavity chain body is 27-33 mm. The accelerating tube manufactured by the design scheme can make dosis reach a stable state at the beam moment.
Description
Technical field
The utility model relates to a kind of accelerating tube, the medical low energy resident wave accelerating pipe of especially a kind of single photon 6MeV.
Background technology
Along with the development of intensity modulated radiation therapy, transfer strong technology increasingly high to the hardware requirement of accelerator, require the accelerator operating state to reach stable in moment, dose rate is controlled, and bright dipping is quick.Therefore, to also just having higher requirement as the accelerating tube of medical accelerator core component.In the low energy accelerator in the market, the electron gun of accelerating tube is main with the moon control diode gun mainly, and its line is unadjustable, and the quality of the X ray that thereupon produces is also bad, can not satisfy the clinical needs of accurate radiotherapy.In addition, because the electron back bombardment problem that the low energy accelerating tube exists, time Hong power is higher, causes the electron gun aperture plate to puncture easily.Existing in prior technology weak point that Here it is.
Summary of the invention
The technical problem that the utility model will solve is exactly not enough to existing in prior technology, and the controlled single photon 6MeV of a kind of line is provided medical low energy accelerating tube.
This programme is realized through following technical measures: the medical low energy resident wave accelerating pipe of this single photon 6MeV comprises that two ends are connected with the chamber chain body of electron gun and target body respectively; The side of chamber chain body is fixedly connected with rectangular waveguide; Be fixedly connected with microwave introduction window and sputter ion pump on the rectangular waveguide; Said electron gun is the grid-control triode gun, and said chamber chain body is the accelerating cavity chain that 6-7 beam aperture accelerating cavity that is 4-6mm and coupling cavity are formed, and the length of chamber chain body is 27-33cm.
Preferred above-mentioned beam aperture is that the length of 5mm, chamber chain body is 28.5cm.
The negative electrode in the above-mentioned grid-control triode gun and the center of grid have with one heart and the through hole of equal diameters, and the diameter of through hole is 1-2mm, and this electron gun has increased a control grid than diode gun, and the center of negative electrode and grid and cover plate.When producing electron back bombardment, return Hong electronics and directly beat on the cover board through behind the through hole, make back Hong electronics avoid grid and negative electrode, thereby prolonged the useful life of grid and negative electrode.
Aperture plate diameter wiry adopts 0.04-0.06mm in the above-mentioned grid, with counnter attack Hong the ability that improves grid.
An end that is connected with target body in the chain body of above-mentioned chamber is through the sealing of titanium window; Target body is positioned at titanium window below and flexibly connects with chamber chain body; This version can guarantee under the situation of not destroying the accelerating tube vacuum, target body to be carry out demolition and replacement, and has prolonged the useful life of accelerating tube effectively.
Above-mentioned sputter ion pump is that pumping speed is the circular sputter ion pump of 5L/s, keeps high vacuum in the pipe by sputter ion pump during accelerating tube work, and its vacuum current is less than 0.5 μ A during work.
Between above-mentioned target body and the titanium window cooling water channel is arranged, current fully cool off target body and titanium window, to improve the useful life of target body and titanium window.
Above-mentioned chamber chain body arranged outside has cooling water pipe, when accelerating tube is worked, through cooling water pipe it is cooled off.
Coaxial or the coupling cavity of above-mentioned accelerating cavity and coupling cavity places outside the accelerating cavity axis, can select flexibly according to concrete needs.
The beneficial effect of this programme can be learnt according to the narration to such scheme; In the medical low energy resident wave accelerating pipe of this single photon 6MeV; The electron gun that is adopted is the grid-control triode gun, and the grid-control triode gun has increased a grid than diode gun, and grid halved tie preferably stream is controlled and can be finely tuned x-ray dose rate and energy; Make electronic beam current reach stable, and bombard target body generation X ray fast in moment.Its chamber chain body is the accelerating cavity chain that 6-7 beam aperture accelerating cavity that is 4-6mm and coupling cavity are formed, and the length of chamber chain body is 27-33cm, and this accelerating tube that designs and produces can make dosage reach stable going out to restraint moment.This shows that the utility model compared with prior art has substantive distinguishing features and progress, the beneficial effect of its enforcement also is conspicuous.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the structural representation of Fig. 1 electron gun.
Fig. 3 is the partial enlarged drawing that A is ordered among Fig. 2.
Fig. 4 is the main TV structure sketch map of axle coupling accelerating structure.
Fig. 5 is the left TV structure sketch map of axle coupling accelerating structure.
Fig. 6 is the main TV structure sketch map of limit coupling accelerating structure.
Fig. 7 is the left TV structure sketch map of limit coupling accelerating structure.
Among the figure, 1 is electron gun, and 2 are the argon arc welding flange, and 3 is cooling water pipe, and 4 is coupling cavity, and 5 is accelerating cavity; 6 is chamber chain body, and 7 is sputter ion pump, and 8 is microwave introduction window, and 9 is rectangular waveguide, and 10 is connecting bolt, and 11 is target body; 12 is the titanium window, and 13 is anode, and 14 is grid, and 15 is binding post, and 16 is through hole, and 17 is cover plate; 18 is filament, and 19 is cloudy control assembly, and 20 is grid assembly, and 21 is negative electrode, and 22 is housing, and 23 is through hole.
Embodiment
For clearly demonstrating the technical characterstic of this programme, below through embodiment, and combine its accompanying drawing, this programme is set forth.
The medical low energy resident wave accelerating pipe of a kind of single photon 6MeV; As shown in Figure 1; It comprises that two ends are connected with the chamber chain body 6 of electron gun 1 and target body 11 respectively; The side of chamber chain body 6 is fixedly connected with rectangular waveguide 9, and being fixedly connected with microwave introduction window 8 on the rectangular waveguide 9 is the circular sputter ion pump 7 of 5L/s with pumping speed, and vacuum current is less than 0.5 μ A during sputter ion pump 7 work.Said electron gun 1 adopts the grid-control triode gun, and said chamber chain body 6 is the accelerating cavity chain of 6-7 the beam aperture accelerating cavity 5 that is 4-6mm with coupling cavity 4 compositions, and the length of chamber chain body 6 is 27-33cm.The length that preferred beam aperture is 5 ± 0.2mm, chamber chain body 6 is 28.5cm, selects for use these three groups of data and combination to use, and makes accelerating tube can take into account the relation of energy and dose rate, and makes accelerating tube that less electron back bombardment arranged.Wherein, accelerating cavity 5 can adopt following dual mode with the version of coupling cavity 4: (1) like Fig. 4 and shown in Figure 5, accelerating cavity 5 is coaxial with coupling cavity 4, forms binary cycle axle coupling accelerating structure; (2) like Fig. 6 and shown in Figure 7, coupling cavity 4 places outside accelerating cavity 5 axis, forms binary cycle limit coupling accelerating structure, can select flexibly according to concrete operation instructions for use.
Wherein, as shown in Figures 2 and 3, grid-control triode gun 1 comprises housing 22 and is positioned at the anode 13 and cover plate 17 at housing 22 two ends, is provided with cloudy control assembly 19 and grid assembly 20 in the housing 22; Grid 14 in the said grid assembly 20 is fixedly installed in the upper end of negative electrode 21 in the cloudy control assembly 19; The center of negative electrode 21 and grid 14 has the through hole 16 and through hole 23 of concentric and equal diameters; The diameter of through hole 16 and through hole 23 is 1-2mm, and the diameter of preferred through hole 16 and through hole 23 is 2mm.This electron gun 1 has increased a control grid 14 than diode gun, and aperture plate diameter wiry adopts 0.04-0.06mm in the grid 14, and the center of negative electrode 21 and grid 14 and cover plate 17.Electron gun 1 is fixing with 6 welding of chamber chain body through argon arc welding flange 2.When producing electron back bombardment; Electronics gets into through hole 23 and through hole 16 after through anode 13 successively; Thereby make grid 14 and negative electrode 21 directly avoid back Hong electronics, Hong electronics is directly beaten on cover plate 17, the heat that electron bombard produces directly distributes through cover plate 17; The influence of effectively having avoided time Hong duplet grid 14 and negative electrode 21 to cause; Under the prerequisite that does not change the accelerating tube high acceleration gradient, reduce the injury that electron back bombardment causes grid 14 and negative electrode 21, thereby prolonged the useful life of grid 14 and negative electrode 21, guaranteed the stability of the output dose and the energy of accelerating tube.The aperture plate diameter wiry that is adopted owing to grid 14 again is bigger, so the ability of its anti-electron back bombardment is stronger, and long service life.
When grid 14 targets 21 add a little negative voltage (cut-off bias one Egc); Negative electrode 21 emissions are ended; This is equivalent to stop radiation in the gap phase of pulse, and duration grid 14 targets 21 of pulse add zero or a little positive voltage, make negative electrode 21 emitting electrons; Through adjustment, reach control to the electronics beam to this positive voltage.And the voltage of negative electrode 21 antianodes 13 can add a stable high direct voltage all the time.
In addition, for cooling chamber chain body 6, chain body 6 arranged outside have cooling water pipe 3 in the chamber, through the recirculated water in the cooling water pipe 3 heat of chamber chain body 6 are in time taken away.For fully cooling target body 11 and titanium window 12, between target body 11 and titanium window 12, be provided with cooling water channel, this version can guarantee the air-tightness of chamber chain body 6, can avoid temperature too high and influence useful life of target body 11 and titanium window 12 again.
An end that is connected with target body 11 in the above-mentioned chamber chain body 6 was opened the vacuum and the target body of chamber chain body 6 in 11 minutes through titanium window 12 through 12 sealings of titanium window, made in the chamber chain body 6 to keep high vacuum always.Target body 11 is positioned at titanium window 12 belows, and target body 11 and 6 flexible connections of chamber chain body, and this flexibly connects is that target body 11 is through edge of a knife flange and connecting bolt 10 and 6 flexible connections of chamber chain body.After adopting this dismountable mechanical connecting structure,, under the situation of not destroying the accelerating tube vacuum, can target body 11 be unloaded and in time more renews, can effectively guarantee the target spot symmetry, the useful life that can also improve accelerating tube if wearing and tearing appear in target body 11.In order to guarantee the air-tightness of chamber chain body 6, target body 11 is externally used flange argon arc welding sealing-in after adopting above-mentioned mechanical connection manner with chamber chain body 6 again.
To quickening the optimal design of tube chamber chain body 6, under the situation that does not reduce the impedance of homogeneous tube line, reduced effectively that electron back bombardment has effectively prolonged the useful life of electron gun 1 to the influence that electron gun 1 produces in the chain body 6 of chamber through above-mentioned.Electronics through after quickening, is drawn from the titanium window 12 that is welded on chain body 6 ends of chamber in chamber chain body 6, and bombardment heavy metal target body 11 produces X ray.Electronics is by 1 emission of grid-control triode gun; The transmitted beam intensity of flow of grid-control triode gun 1 can be adjustable from 5mA to 1500mA; The cloudy control diode gun of this electron gun 1 has increased a grid 14; Grid 14 halved tie preferably stream is controlled, and satisfies the radiotherapy new technology to technological requirements such as accelerating tubes " line is controlled, moment is stable, bright dipping fast ".Welded and installed has circular or square flange on the last chamber of this accelerating tube, is used for the upright installation of accelerating tube.
Can pass through existing techniques in realizing without the technical characterictic of describing in the utility model, repeat no more at this.
Claims (10)
1. medical low energy resident wave accelerating pipe of single photon 6MeV; It comprises that two ends are connected with the chamber chain body of electron gun and target body respectively; The side of chamber chain body is fixedly connected with rectangular waveguide, is fixedly connected with microwave introduction window and sputter ion pump on the rectangular waveguide, it is characterized in that: said electron gun is the grid-control triode gun; Said chamber chain body is the accelerating cavity chain that 6-7 beam aperture accelerating cavity that is 4-6mm and coupling cavity are formed, and the length of chamber chain body is 27-33cm.
2. the medical low energy resident wave accelerating pipe of single photon 6MeV according to claim 1 is characterized in that: said beam aperture is 5mm.
3. the medical low energy resident wave accelerating pipe of single photon 6MeV according to claim 1 and 2 is characterized in that: the length of said chamber chain body is 28.5cm.
4. the medical low energy resident wave accelerating pipe of single photon 6MeV according to claim 1 is characterized in that: the negative electrode in the said grid-control triode gun and the center of grid have with one heart and the through hole of equal diameters.
5. the medical low energy resident wave accelerating pipe of single photon 6MeV according to claim 4 is characterized in that: the diameter of said through hole is 1-2mm.
6. according to claim 4 or the medical low energy resident wave accelerating pipe of 5 described single photon 6MeV, it is characterized in that: aperture plate diameter wiry is 0.04-0.06mm in the said grid.
7. the medical low energy resident wave accelerating pipe of single photon 6MeV according to claim 3 is characterized in that: an end that is connected with target body in the chain body of said chamber is through the sealing of titanium window, and target body is positioned at titanium window below and flexibly connects with chamber chain body.
8. the medical low energy resident wave accelerating pipe of single photon 6MeV according to claim 1 is characterized in that: said sputter ion pump is that pumping speed is the circular sputter ion pump of 5L/s, and its vacuum current is less than 0.5 μ A during work.
9. the medical low energy resident wave accelerating pipe of single photon 6MeV according to claim 4 is characterized in that: said chamber chain body arranged outside has cooling water pipe, between target body and the titanium window cooling water channel is arranged.
10. the medical low energy resident wave accelerating pipe of single photon 6MeV according to claim 1 is characterized in that: the coaxial or coupling cavity of said accelerating cavity and coupling cavity places outside the accelerating cavity axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220258527 CN202634872U (en) | 2012-06-04 | 2012-06-04 | 6MeV single-photon medical low-energy standing wave accelerating tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220258527 CN202634872U (en) | 2012-06-04 | 2012-06-04 | 6MeV single-photon medical low-energy standing wave accelerating tube |
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| CN202634872U true CN202634872U (en) | 2012-12-26 |
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| CN 201220258527 Expired - Lifetime CN202634872U (en) | 2012-06-04 | 2012-06-04 | 6MeV single-photon medical low-energy standing wave accelerating tube |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102711359A (en) * | 2012-06-04 | 2012-10-03 | 山东新华医疗器械股份有限公司 | Single-photon 6MeV medical low-energy standing-wave accelerating tube |
| CN104619110A (en) * | 2015-03-04 | 2015-05-13 | 中国科学院高能物理研究所 | Edge-coupling standing wave accelerating tube |
| CN105307376A (en) * | 2015-09-05 | 2016-02-03 | 刘洋 | Medical electron linear accelerator |
| CN106332433A (en) * | 2016-11-04 | 2017-01-11 | 中国工程物理研究院应用电子学研究所 | Axis coupled double-cycle electron accelerating tube, accelerator and cavity ascending frequency adjusting method |
| CN110085497A (en) * | 2019-04-23 | 2019-08-02 | 东南大学 | One kind being based on travelling-wave tubes X-ray communication device |
-
2012
- 2012-06-04 CN CN 201220258527 patent/CN202634872U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102711359A (en) * | 2012-06-04 | 2012-10-03 | 山东新华医疗器械股份有限公司 | Single-photon 6MeV medical low-energy standing-wave accelerating tube |
| CN104619110A (en) * | 2015-03-04 | 2015-05-13 | 中国科学院高能物理研究所 | Edge-coupling standing wave accelerating tube |
| CN105307376A (en) * | 2015-09-05 | 2016-02-03 | 刘洋 | Medical electron linear accelerator |
| CN106332433A (en) * | 2016-11-04 | 2017-01-11 | 中国工程物理研究院应用电子学研究所 | Axis coupled double-cycle electron accelerating tube, accelerator and cavity ascending frequency adjusting method |
| CN106332433B (en) * | 2016-11-04 | 2019-05-24 | 中国工程物理研究院应用电子学研究所 | Axis couples binary cycle electronic acceleration tube and accelerator and cavity raising frequency adjusting method |
| CN110085497A (en) * | 2019-04-23 | 2019-08-02 | 东南大学 | One kind being based on travelling-wave tubes X-ray communication device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |
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| CX01 | Expiry of patent term |