Vertical two-photon standing wave accelerating tube

Abstract

The utility model discloses a vertical type two-photon standing wave accelerating tube, which belongs to the technical field of acceleration and comprises an accelerating cavity chain body. An electron gun and a target body are respectively mounted at two ends of the accelerating cavity chain body; the side wall of the accelerating cavity chain body is fixedly connected with a rectangular waveguide; the rectangular waveguide is fixedly connected with a microwave input window and a sputtering ion pump; an accelerating cavity and a coupling cavity are formed in the accelerating cavity chain body, and the accelerating cavity and the coupling cavity with 7.5 beam apertures form an accelerating cavity chain; an adjusting assembly used for adjusting field intensity distribution is connected to the end, close to the target body, of the accelerating cavity chain body, the adjusting assembly selects a tuning plate and an adjusting device, the adjusting device is fixedly installed on the outer wall of the accelerating cavity chain body, the driving end of the adjusting device penetrates through the accelerating cavity chain body and then is fixedly connected with the tuning plate, and the tuning plate is located in the accelerating cavity close to the target body. By means of the mode, the intermediate-energy two-photon accelerator is short in length and capable of standing on an irradiation head, the acceleration gradient is high enough, and the treatment requirement of the intermediate-energy two-photon accelerator is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to acceleration technical field, concretely relates to a vertical type double photon standing wave acceleration tube. BACKGROUND

[0002] The electron linear accelerator is a kind of device using microwave electric field along the linear track acceleration electron, and makes electron energy reach specific requirement, is currently widely used in the treatment of tumor. Medical electron linear accelerator is divided into low-energy machine (4-6MeV), middle-energy machine (8~14MeV) and high-energy machine (15~25MeV) according to the different application energy. Middle-energy machine and high-energy machine can generally produce multiple energy electron line and two grades χ line (called double photon) simultaneously. And low-energy machine due to the accelerated electron energy is low (6MeV), only produces a grade χ line (called single photon). The higher the energy of x line, the deeper the treatment depth, simultaneously, the length of the core component acceleration tube of linear accelerator is also longer. Therefore, whether middle-energy machine or high-energy machine, its acceleration tube is placed horizontally on the medical accelerator rack, and the beam is irradiated to the patient's lesion after being deflected by 270 degrees in the irradiation head, and the model is relatively large. And low-energy machine, acceleration tube is short, can be erected in the irradiation head, but can only provide a grade χ ray.

[0003] Based on this, the utility model discloses a vertical type double photon standing wave acceleration tube to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] In view of the above-mentioned shortcomings of prior art, the utility model provides a vertical type double photon standing wave acceleration tube.

[0005] To achieve the above object, the utility model is realized by the following technical schemes:

[0006] A vertical type double photon standing wave acceleration tube, including acceleration cavity chain body:

[0007] The acceleration cavity chain body is respectively installed with electron gun and target body at both ends;

[0008] The side wall of acceleration cavity chain body is fixedly connected with rectangular waveguide;

[0009] The rectangular waveguide is fixedly connected with microwave input window and sputtering ion pump

[0010] The acceleration cavity chain body is provided with acceleration cavity and coupling cavity, and the acceleration cavity chain composed of 7.5 beam apertures of acceleration cavity and coupling cavity;

[0011] The adjusting assembly is selected from a tuning plate, an adjusting device, a connecting plate, a motor and a horizontal shaft, the adjusting device is fixedly installed on the outer wall of the acceleration cavity chain body, the connecting plate is fixedly connected to the motor away from the outer wall of the acceleration cavity chain body, the output end of the motor is fixedly connected to the horizontal shaft through the connecting plate, the horizontal shaft is fixedly connected to the tuning plate through the acceleration cavity chain body, the tuning plate is located in the acceleration cavity close to the target body, and the horizontal shaft is slidably connected with the sliding hole of the acceleration cavity chain body.

[0012] The cooling pipe is connected to the outer wall of the acceleration cavity chain body for cooling the acceleration cavity chain body, and the cooling pipe is connected to the temperature control equipment.

[0013] Further, the electron gun is selected from a diode electron gun.

[0014] Further, the sputtering ion pump has a pumping speed of 5 L / s.

[0015] Further, the acceleration cavity chain body has a length of 35-40 cm.

[0016] Further, the acceleration cavity chain body has a length of 40 cm.

[0017] Further, the beam aperture has a diameter of 4-6 mm.

[0018] Further, the beam aperture has a diameter of 5 mm.

[0019] The utility model has following technical effects: the acceleration cavity chain of the utility model is composed of 7.5 beam apertures of acceleration cavity and coupling cavity, adopts high acceleration gradient side coupling acceleration structure, removes the coupling cavity not participating in acceleration from the acceleration axis, makes the acceleration structure more compact, optimizes the acceleration cavity structure, and the acceleration field strength gradient can reach 30MV / m; the acceleration cavity chain body can consider the relationship between energy and dose rate, and makes the acceleration tube have smaller electron back bombardment, so that the acceleration tube output energy can reach 10MeV, that is, the energy level of the medium-energy medical accelerator. The tuning plate is located at different positions in the acceleration cavity, thereby adjusting the field strength distribution of the acceleration cavity chain body, adjusting the electron beam intensity emitted by the electron gun, generating different energy electron beams, and the electron beams strike the target body to generate double-energy X-rays 6MV and 10MV. The utility model has a relatively short length, can be vertically arranged on the irradiation head, and the acceleration gradient is high enough to meet the treatment requirements of the medium-energy dual-photon accelerator. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0021] Figure 1 A schematic diagram of a vertical double-photon standing wave accelerating tube structure of the present application Figure 1 ;

[0022] Figure 2 A schematic diagram of a vertical double-photon standing wave accelerating tube structure of the present application Figure 2 ;

[0023] Figure 3 A schematic diagram of an adjusting assembly structure.

[0024] The numbers in the drawings represent respectively:

[0025] 1, electron gun; 2, accelerating cavity chain body; 3, sputtering ion pump; 4, microwave input window; 5, rectangular waveguide; 6, cooling pipe; 7, tuning plate; 8, adjusting device; 9, accelerating cavity; 10, coupling cavity; 11, target body; 12, connecting plate; 13, motor; 14, transverse shaft. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] The present application will be further described below in combination with the embodiments.

[0028] Embodiment 1

[0029] Please refer to the drawings in the specification Figures 1-2 A vertical double-photon standing wave accelerating tube, comprising an accelerating cavity chain body 2:

[0030] The accelerating cavity chain body 2 is respectively provided with an electron gun 1 and a target body 11 at both ends;

[0031] The side wall of the accelerating cavity chain body 2 is fixedly connected with a rectangular waveguide 5;

[0032] The rectangular waveguide 5 is fixedly connected with a microwave input window 4 and a sputtering ion pump 3

[0033] The accelerating cavity chain body 2 is provided with accelerating cavities 9 and coupling cavities 10, and the accelerating cavity chain composed of 7.5 beam apertures of the accelerating cavities 9 and the coupling cavities 10;

[0034] The accelerating cavity chain composed of 7.5 beam apertures of the accelerating cavities 9 and the coupling cavities 10 adopts a high-accelerating-gradient side-coupling accelerating structure, the coupling cavities 10 not participating in acceleration are moved out of the accelerating axis, the accelerating structure is more compact, the structure of the accelerating cavities 9 is optimized, and the accelerating field strength gradient can reach 30 MV / m; the accelerating cavity chain body 2 can consider the relationship between energy and dose rate, and the electron backstreaming of the accelerating tube is small, so that the output energy of the accelerating tube can reach 10 MeV, that is, the energy level of a medium-energy medical accelerator.

[0035] The accelerating cavity chain body 2 is connected with an adjusting assembly for adjusting the field strength distribution near the end of the target body 11, the adjusting assembly is selected from a tuning plate 7, an adjusting device 8, a connecting plate 12, a motor 13 and a transverse shaft 14, the adjusting device 8 is fixedly installed on the outer wall of the accelerating cavity chain body 2, the adjusting device 8 is connected with the connecting plate 12 at the driving end, the connecting plate 12 is fixedly connected with the motor 13 away from the outer wall of the accelerating cavity chain body 2, the output end of the motor 13 is fixedly connected with the transverse shaft 14 after penetrating through the connecting plate 12, the transverse shaft 14 is fixedly connected with the tuning plate 7 after penetrating through the accelerating cavity chain body 2, the tuning plate 7 is located in the accelerating cavity 9 near the target body 11, and the transverse shaft 14 is slidingly connected with the sliding hole of the accelerating cavity chain body 2 in fit;

[0036] The adjusting device 8 is selected from an electric push rod or a linear module.

[0037] The adjusting device 8 drives the tuning plate 7 to move, the tuning plate 7 is located at different positions in the accelerating cavity 9, so that the field strength distribution of the accelerating cavity chain body 2 is adjusted, simultaneously, the motor 13 drives the transverse shaft 14 to rotate, the transverse shaft 14 drives the tuning plate 7 to rotate and adjust the orientation, drives the tuning plate 7 in the accelerating cavity chain body 2, changes the cavity structure in the accelerating cavity chain body 2, and thus the field strength distribution is adjusted.

[0038] In addition, the intensity of the electron beam emitted by the electron gun 1 is adjusted, different energy electron beams are generated, the target body 11 is bombarded by the electron beams, and double-energy X rays of 6 MV and 10 MV are generated.

[0039] The outer wall of the accelerating cavity chain body 2 is connected with a cooling pipe 6 for cooling the accelerating cavity chain body 2, and the cooling pipe 6 is connected with a temperature control device.

[0040] The electron gun 1 is selected from a two-electron gun;

[0041] The sputtering ion pump 3 has a pumping speed of 5 L / s;

[0042] The length of the accelerating cavity chain body 2 is 35-40 cm;

[0043] Preferably, the length of the accelerating cavity chain body 2 is 40 cm;

[0044] The diameter of the accelerating cavity 9 is 7.5 times the sum of the beam apertures;

[0045] Preferably, the beam aperture is 4-6 mm;

[0046] Preferably, the beam aperture is 5 mm.

[0047] The application has a relatively short length, can stand on the irradiation head, and has a high enough accelerating gradient to meet the treatment requirements of a medium-energy two-photon accelerator.

[0048] The above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A vertical double-photon standing wave accelerator tube, comprising an acceleration cavity chain body (2), characterized in that: An electron gun (1) and a target body (11) are respectively arranged at two ends of the acceleration cavity chain body (2); A rectangular waveguide (5) is fixedly connected to a side wall of the acceleration cavity chain body (2); A microwave input window (4) and a sputtering ion pump (3) are fixedly connected to the rectangular waveguide (5); An acceleration cavity (9) and a coupling cavity (10) are arranged in the acceleration cavity chain body (2), and the acceleration cavity chain is composed of seven and a half beam apertures of the acceleration cavity (9) and the coupling cavity (10); An adjusting assembly for adjusting field intensity distribution is arranged at an end of the acceleration cavity chain body (2) close to the target body (11), the adjusting assembly is selected from a tuning plate (7), an adjusting device (8), a connecting plate (12), a motor (13) and a horizontal shaft (14), the adjusting device (8) is fixedly installed on an outer wall of the acceleration cavity chain body (2), the adjusting device (8) is connected with the connecting plate (12) at a driving end, the connecting plate (12) is fixedly connected with the motor (13) away from the outer wall of the acceleration cavity chain body (2), the motor (13) is fixedly connected with the horizontal shaft (14) after penetrating through the connecting plate (12), the horizontal shaft (14) is fixedly connected with the tuning plate (7) after penetrating through the acceleration cavity chain body (2), the tuning plate (7) is arranged in the acceleration cavity (9) close to the target body (11), and the horizontal shaft (14) is slidingly connected with a sliding hole of the acceleration cavity chain body (2); A cooling pipe (6) for cooling the acceleration cavity chain body (2) is arranged on the outer wall of the acceleration cavity chain body (2), and the cooling pipe (6) is connected with a temperature control device.

2. The standing-wave, vertical double photoinjector of claim 1, wherein, The electron gun (1) is selected from a diode electron gun.

3. The standing-wave, vertical double photoinjector of claim 2, wherein, The sputtering ion pump (3) has a pumping speed of 5 L / s.

4. The standing-wave, vertical double photoinjector of claim 3, wherein, The length of the acceleration cavity chain body (2) is 35-40 cm.

5. The standing-wave, vertical double-photoelectron accelerator of claim 4, wherein, The length of the acceleration cavity chain body (2) is 40 cm.

6. The standing-wave, vertical double-photoelectron accelerator of claim 5, wherein, The beam aperture is 4-6 mm.

7. The standing-wave, vertical double-photoelectron accelerator of claim 6, wherein, The beam aperture is 5 mm.

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