CN202634871U - 6MeV single-photon medical low-energy accelerating tube - Google Patents
6MeV single-photon medical low-energy accelerating tube Download PDFInfo
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- CN202634871U CN202634871U CN 201220258522 CN201220258522U CN202634871U CN 202634871 U CN202634871 U CN 202634871U CN 201220258522 CN201220258522 CN 201220258522 CN 201220258522 U CN201220258522 U CN 201220258522U CN 202634871 U CN202634871 U CN 202634871U
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Abstract
The utility model provides a 6MeV single-photon medical low-energy accelerating tube. The 6MeV single-photon medical low-energy accelerating tube includes a cavity chain main body of which two ends are respectively fixedly connected with an electron gun and a target body; wherein a rectangular waveguide is fixedly connected on the side surface of the cavity chain main body; a microwave input window and a sputter ion pump are fixedly connected with the rectangular waveguide; the electron gun is a negative controlled diode electron gun, which is used for emitting electrons; the cavity chain main body is an accelerating cavity chain, which is formed by 6-7 accelerating cavities with beam apertures of 4-6 mm and a coupling cavity; and the length of the cavity chain main body is 31-33 cm. The whole tube of the accelerating tube is provided with higher beam impedance so as to enable the output dose rate of the accelerating tube to be enhanced to 4-6 Gy/min* m after being averaged, the ratio of absorbed dose ratio at underwater 10cm and the maximum absorbed dose is superior to 67 percent, and the targeting beam spot is less than Phi 1.5 mm, so that a penumbra index of an accelerator is effectively reduced and the clinical precise radiotherapy requirements for high performance, low loss, speediness in emitting light, long service life and the like on the accelerating tube can be met.
Description
Technical field
The utility model relates to a kind of accelerating tube, the medical low energy accelerating tube of especially a kind of single photon 6MeV.
Background technology
In the hospital clinical radiotherapy; Medical electron linear accelerator is main radiotherapy equipment; And accelerating tube is the core component that linear accelerator produces ray; Its working mechanism is that utilization has the high energy electron of certain energy and the microwave electric field of HIGH-POWERED MICROWAVES interacts, thereby obtains higher energy.If electronics is directly drawn, then can do the treatment of electronics line; If bremstrahlen takes place in the electron bombard heavy metal target, produce X ray, then can do the treatment of X line.
Accelerating tube by energy distinguish can be divided into low energy accelerating tube (4-6MeV), middle can accelerating tube (8-15MeV), three kinds of high energy accelerating tubes (20-25MeV); Be divided into two types of resident wave accelerating pipe and travelling wave accelerating tubes by the accelerating structure difference.At present, the 6MeV medical electron linear accelerator is the maximum type of hospital equipment, is the very high radiotherapy equipment of a cost performance, can satisfy about 85% need carry out radiocurable tumor patient needs.Its accelerating tube adopts all-sealed structure, and length is short, can stand upright in the accelerator treatment head, need not deflection system, also can save focusing system and beam steering system simultaneously, compact integral structure, and type is light, and failure rate is low.Accurate radiotherapy hopes to adopt low fournier's treatment, and each the requirement gives higher dosage, generally requires dose rate to reach 5-8Gy/minm clinically.The medical accelerating tube of existing 6MeV, because technical merit is limit, the output dose rate is generally 2-3Gy/minm behind the accelerating tube output X ray expansion, has prolonged treatment time greatly and has been unfavorable for carrying out of accurate radiotherapy.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 high single photon 6MeV of a kind of output dose rate is provided medical low energy accelerating tube.
This programme is realized through following technical measures: the medical low energy accelerating tube of this single photon 6MeV comprises that two ends are fixedly 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 cloudy control diode 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 31-33cm.
Preferred above-mentioned beam aperture is 5mm, and the length of chamber chain body is 32.5cm.
Above-mentioned chamber chain body arranged outside has cooling water pipe, through cooling water pipe chamber chain body is cooled off.
Above-mentioned target body is that current directly cool off, and target body is directly immersed in the water, and the radiating efficiency of this type of cooling is high, is beneficial to the useful life that prolongs target body.
Above-mentioned sputter ion pump is that pumping speed is the circular titanium pump of 5L/s, through this sputter ion pump chamber chain body and rectangular waveguide is vacuumized, and its vacuum current is less than 0.5 μ A during work.
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.
In order to reach the purpose of firm welding, making above-mentioned rectangular waveguide and chamber chain body is that soldering is fixed; Electron gun and chamber chain body, target body and chamber chain body, microwave introduction window and rectangular waveguide are that argon arc welding is fixed.
The beneficial effect of this programme can learn that in the medical low energy accelerating tube of this single photon 6MeV, said electron gun is cloudy control diode gun, through the moon control diode gun emitting electrons according to the narration to such scheme; 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 31-33cm.The homogeneous tube of this accelerating tube has higher line impedance; Make the output dose rate of accelerating tube bring up to 4Gy/minm behind the expansion between the 6Gy/minm; And the absorbed dose at 10cm place is superior to 67% with the ratio of maximum absorbed dose under water; And the bundle spot of practicing shooting has effectively reduced the penumbra index of accelerator less than Φ 1.5mm, the requirement of satisfied that clinical accurate radiotherapy is high-effect to accelerating tube, low-loss, bright dipping fast, life-span are long etc.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 main TV structure sketch map of axle coupling accelerating structure.
Fig. 3 is the left TV structure sketch map of axle coupling accelerating structure.
Fig. 4 is the main TV structure sketch map of limit coupling accelerating structure.
Fig. 5 is the left TV structure sketch map of limit coupling accelerating structure.
Among the figure, 1 is electron gun, and 2 is chamber chain body, and 3 is sputter ion pump, and 4 is microwave introduction window, and 5 is rectangular waveguide, and 6 is target body, and 7 is coupling cavity, and 8 is accelerating cavity, and 9 is cooling water pipe.
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 accelerating tube of a kind of single photon 6MeV; As shown in Figure 1; It comprises that two ends are fixedly connected with the chamber chain body 2 of electron gun 1 and target body 6 respectively, and the side of chamber chain body 2 is fixedly connected with rectangular waveguide 5 through soldering, and chamber chain body 2 gets 1.7 with the degree of coupling of rectangular waveguide 5; Be fixedly connected with microwave introduction window 4 and sputter ion pump 3 on the rectangular waveguide 5; Microwave introduction window 4 is fixed for argon arc welding with rectangular waveguide 5, and this sputter ion pump 3 is the circular titanium pump of 5L/s for pumping speed, and its vacuum current is less than 0.5 μ A during work.Said electron gun 1 is cloudy control diode gun.
Said chamber chain body 2 is the accelerating cavity chain of 6-7 the beam aperture accelerating cavity 8 that is 4-6mm with coupling cavity 7 compositions, and the length of chamber chain body 2 is 31-33cm; Preferred above-mentioned beam aperture is 5mm, and the length of chamber chain body 2 is 32.5cm.
Wherein, accelerating cavity 8 can adopt following dual mode with the version of coupling cavity 7: (1) as shown in Figures 2 and 3, accelerating cavity 8 is coaxial with coupling cavity 7, forms binary cycle axle coupling accelerating structure; (2) like Fig. 4 and shown in Figure 5, coupling cavity 7 places outside accelerating cavity 8 axis, forms binary cycle limit coupling accelerating structure.
Electron gun 1 is connected with chamber chain body 2 through its anode, to guarantee the concentricity of electron gun 1 and chamber chain body 2.Target body 6 is fixing through argon arc welding flange and 2 welding of chamber chain body.Vacuumizing and exhausting after the homogeneous tube welding is accomplished, and homogeneous tube vacuum degree remains on more than 10 Pa after guaranteeing tube sealing.According to particle dynamics and line physical knowledge accurate Calculation, the perveance that makes electron gun 1 is in 0.25-0.33uP scope.After electronics is launched by electron gun 1, quicken back bombardment heavy metal target body 6 under the effect in microwave electric field in chamber chain body 2 and produce X ray, thereby treat.
Can pass through existing techniques in realizing without the technical characterictic of describing in the utility model, repeat no more at this.
Claims (9)
1. medical low energy accelerating tube of single photon 6MeV; It comprises that two ends are fixedly 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, it is characterized in that: said electron gun is cloudy control diode 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 31-33cm.
2. the medical low energy accelerating tube of single photon 6MeV according to claim 1 is characterized in that: said beam aperture is 5mm.
3. the medical low energy accelerating tube of single photon 6MeV according to claim 1 and 2 is characterized in that: the length of said chamber chain body is 32.5cm.
4. the medical low energy accelerating tube of single photon 6MeV according to claim 3 is characterized in that: said chamber chain body arranged outside has cooling water pipe.
5. the medical low energy accelerating tube of single photon 6MeV according to claim 3 is characterized in that: said target body is that current directly cool off.
6. the medical low energy accelerating tube of single photon 6MeV according to claim 3 is characterized in that: said sputter ion pump is that pumping speed is the circular titanium pump of 5L/s, and its vacuum current is less than 0.5 μ A during work.
7. the medical low energy accelerating tube 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.
8. the medical low energy accelerating tube of single photon 6MeV according to claim 3 is characterized in that: said electron gun and chamber chain body, target body and chamber chain body, microwave introduction window and rectangular waveguide are that argon arc welding is fixed.
9. the medical low energy accelerating tube of single photon 6MeV according to claim 3 is characterized in that: said rectangular waveguide and chamber chain body are that soldering is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220258522 CN202634871U (en) | 2012-06-04 | 2012-06-04 | 6MeV single-photon medical low-energy accelerating tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220258522 CN202634871U (en) | 2012-06-04 | 2012-06-04 | 6MeV single-photon medical low-energy accelerating tube |
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| Publication Number | Publication Date |
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| CN202634871U true CN202634871U (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220258522 Expired - Lifetime CN202634871U (en) | 2012-06-04 | 2012-06-04 | 6MeV single-photon medical low-energy accelerating tube |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071875A (en) * | 2013-01-04 | 2013-05-01 | 中国原子能科学研究院 | Process for brazing dissimilar material part of high-frequency window of small medical rotary accelerator |
| CN103702548A (en) * | 2013-12-20 | 2014-04-02 | 中国科学院高能物理研究所 | Cooling component for accelerating tube |
| CN111372368A (en) * | 2020-03-16 | 2020-07-03 | 宁夏方宏辐照技术有限公司 | Special electron linear accelerator of medicine |
| CN112701434A (en) * | 2020-11-30 | 2021-04-23 | 江苏海明医疗器械有限公司 | High-power high-isolation vacuum three-way waveguide |
-
2012
- 2012-06-04 CN CN 201220258522 patent/CN202634871U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071875A (en) * | 2013-01-04 | 2013-05-01 | 中国原子能科学研究院 | Process for brazing dissimilar material part of high-frequency window of small medical rotary accelerator |
| CN103071875B (en) * | 2013-01-04 | 2015-04-29 | 中国原子能科学研究院 | Process for brazing dissimilar material part of high-frequency window of small medical rotary accelerator |
| CN103702548A (en) * | 2013-12-20 | 2014-04-02 | 中国科学院高能物理研究所 | Cooling component for accelerating tube |
| CN111372368A (en) * | 2020-03-16 | 2020-07-03 | 宁夏方宏辐照技术有限公司 | Special electron linear accelerator of medicine |
| CN112701434A (en) * | 2020-11-30 | 2021-04-23 | 江苏海明医疗器械有限公司 | High-power high-isolation vacuum three-way waveguide |
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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 |