S-band linear accelerating tube

Abstract

The utility model provides an S wave band linear accelerating tube which comprises a tube body, an input coupler and an output coupler are respectively arranged at the front end and the rear end of the tube body along the beam transmission direction, a plurality of cavities are arranged in the tube body, the cavities are separated by column pieces, beam holes are arranged in the middle of the column pieces, and the beam holes are communicated with the beam holes. The cavity comprises a plurality of beam bunching cavities and a plurality of light velocity cavities along the beam transmission direction, the cavity lengths of the beam bunching cavities along the beam transmission direction are gradually increased, the cavity lengths of the light velocity cavities are the same, and the aperture of the beam hole is gradually reduced along the beam transmission direction. The S-band linear accelerating tube is simple in structure, low in manufacturing and installation cost and capable of meeting the requirement for high-power output.

Description

Technical Field

[0001] This utility model relates to the technical field of industrial irradiation accelerators, and more precisely to an S-band linear accelerator tube. Background Technology

[0002] High-energy electron accelerators commonly used in industrial irradiation treatment typically operate at 10 MeV / 20 kW in the S-band. High-energy electrons have greater effective penetration into the irradiated material, and their high X-ray conversion efficiency allows them to be converted into X-rays for radiation, thus finding wide application in sterilization, food preservation, and material modification. With the increasing demands of industrial irradiation treatment, the power requirements for high-energy electron accelerators in this field are also rising.

[0003] Currently, high-energy electron accelerators with power greater than 30kW typically employ the following schemes: First, the petal-shaped accelerator. This type of accelerator controls the electron beam to pass through the resonant cavity multiple times, accelerating the beam. The maximum beam power can reach hundreds of kilowatts. However, the petal-shaped accelerator has a complex structure and high cost. Because the electron beam needs to pass through the resonant cavity multiple times, the installation and commissioning techniques for the accelerator are highly demanding. Second, the L-band linear accelerator, with a maximum power of 40kW. However, because the power source, ceramic window, accelerating tube, and other components all need to operate in the L-band, the overall cost is high. Third, a structure combining two S-band accelerating tubes, employing two sets of modulators and klystrons, with a maximum beam power of 40kW. This type of accelerator still suffers from system complexity, high cost, and low cost-effectiveness.

[0004] In summary, there is a need in this field for a technical solution that can increase the beam power of electron linear accelerators at a lower cost. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide an S-band linear accelerator tube, which adopts an equal gradient structure and has several beam focusing cavities and light speed cavities inside, and specifically defines the layout and size parameters of the beam focusing cavities and light speed cavities, so as to improve the beam power at a lower cost.

[0006] To achieve the above objectives, this utility model provides an S-band linear accelerator tube, comprising a tube body, with an input coupler and an output coupler respectively installed at the front and rear ends of the tube body along the beam transmission direction. The tube body has a plurality of cavities, which are separated by barriers. Each barrier has a beam aperture in the middle. Each cavity includes a plurality of focusing cavities and a plurality of high-speed cavities along the beam transmission direction. The length of the focusing cavities gradually increases along the beam transmission direction, while the length of the high-speed cavities is the same. The aperture of the beam aperture gradually decreases along the beam transmission direction.

[0007] Preferably, the tube body includes 6 of the beam-focusing cavities and 52 of the light-speed cavities.

[0008] Preferably, the railings are all of the same thickness, and the thickness of the railings is 5mm.

[0009] Preferably, the cavity length of the light speed cavity is 34.99 mm.

[0010] Preferably, the pipe body is wrapped with a spiral water-proof strip.

[0011] Compared with the prior art, the advantages of the S-band linear accelerator tube disclosed in this utility model are: the S-band linear accelerator tube has a simple structure, low manufacturing and installation costs, and can meet the requirements of high power output. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] like Figure 1 The image shown is a cross-sectional view of an S-band linear accelerator tube according to this application.

[0014] like Figure 2 The diagram shown is a schematic diagram of the cavity structure of an S-band linear accelerator tube according to this application.

[0015] like Figure 3 The diagram shown is a schematic of the water-proof strip of an S-band linear accelerator tube according to this application.

[0016] like Figure 4 The figure shown is an energy gain curve of an S-band linear accelerator tube according to this application.

[0017] like Figure 5 The image shows the beam energy spectrum of an S-band linear accelerator tube according to this application.

[0018] like Figure 6 The image shown is a beam envelope diagram of an S-band linear accelerator tube according to this application. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1 and Figure 2 As shown, this application discloses an S-band linear accelerator tube comprising a tube body 1. An input coupler 101 and an output coupler 102 are respectively installed at the front and rear ends of the tube body 1 along the beam transmission direction. The tube body 1 contains several cavities separated by partitions 13. A beam aperture 130 is located in the center of each partition 13. Each cavity includes several focusing cavities 11 and several high-speed beam cavities 12 along the beam transmission direction. The length D of the focusing cavities 11 gradually increases along the beam transmission direction, while the length D of all high-speed beam cavities 12 is the same. The aperture a of the beam aperture 130 gradually decreases along the beam transmission direction. The focusing cavities 11 form a focusing segment, and the high-speed beam cavities 12 form a high-speed beam segment. The S-band linear accelerator tube adopts an equal-gradient structure, which is simple in structure, has low manufacturing and installation costs, and can meet the requirements of high-power output.

[0021] Specifically, tube 1 includes 6 focusing cavities 11 and 52 high-speed beam cavities 12. The thickness t of the slats 13 is the same, all being 5 mm, and the cavity length D of the high-speed beam cavities 12 is 34.99 mm. As shown in the table below, the focusing cavities 11 are marked as 1-6 along the beam transmission direction, and 7 is the high-speed beam cavity 12. The dimensional parameters are shown below:

[0022]

[0023]

[0024] The thickness t of the slat 13 is the same and meets the requirements of beam power and mechanical strength.

[0025] See Figure 3 The pipe body 1 is wrapped with a spiral water-blocking strip 2, which increases the flow rate of cooling water.

[0026] See the table below. By setting the spiral water-proof strip 2, the temperature rise is small while the power is increased.

[0027] Beam power Total power loss (W) Temperature rise (°C) 20kW 10976 0.87111 32kW 18478 0.97766

[0028] See Figures 4 to 6The graphs are the energy gain curve, beam energy spectrum, and beam envelope obtained from the S-band linear accelerator tube test. The beam obtained using the S-band linear accelerator tube can reach 10MeV / 35kW and can meet the technical requirements.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An S-band linear accelerator tube, characterized in that, The device includes a tube body with an input coupler and an output coupler installed at its front and rear ends along the beam transmission direction, respectively. The tube body has several cavities separated by barriers. Each barrier has a beam aperture in its center. Each cavity includes several focusing cavities and several high-speed beam cavities along the beam transmission direction. The length of the focusing cavities gradually increases along the beam transmission direction, while the length of the high-speed beam cavities is the same. The aperture of the beam aperture gradually decreases along the beam transmission direction.

2. The S-band linear accelerator tube as described in claim 1, characterized in that, The tube body includes 6 of the beam-focusing cavities and 52 of the light-speed cavities.

3. The S-band linear accelerator tube as described in claim 1, characterized in that, The railings are all the same thickness, and the thickness of each railing is 5mm.

4. The S-band linear accelerator tube as described in claim 1, characterized in that, The length of the light-speed cavity is 34.99 mm.

5. The S-band linear accelerator tube as described in claim 1, characterized in that, The pipe body is wrapped with a spiral water-proof strip.

Images