Electron accelerator

Abstract

The present invention provides an electron accelerator, comprising a power source, a load, a microwave distribution and synthesis device, a first accelerating tube and a second accelerating tube; the microwave distribution and synthesis device separates microwaves input from the power source into a first microwave and a second microwave and transmits the microwaves to the first accelerating tube and the second accelerating tube; the microwave distribution and synthesis device synthesizes microwaves reflected from the first accelerating tube and the second accelerating tube into a third microwave, and the third microwave is output to the load. In the electron accelerator provided by the present invention, the load can absorb microwaves reflected from the first accelerating tube and the second accelerating tube, effectively protecting the power source and extending the service life of the power source, and the microwave distribution and synthesis device is smaller in size and weight than a four-end circulator, thereby reducing the size and weight of the electron accelerator and facilitating the movement of the electron accelerator.

Description

Technical Field

[0001] The present invention belongs to the technical field of electron accelerators, and more specifically, relates to an electron accelerator. Background Art

[0002] Electron accelerators mainly include large electron accelerators and small electron accelerators. Large electron accelerators are mainly used for scientific research, such as the electron linear accelerator of the collider and the electron linear accelerator of the free electron laser; small electron linear accelerators are mainly used in food irradiation, medical treatment, security inspection, flaw detection and other fields.

[0003] Small electron linear accelerators mainly include high-voltage accelerators and microwave accelerators. High-voltage accelerators have high current intensity and low electron energy; microwave accelerators have low current intensity and high electron energy.

[0004] Microwave accelerators mainly include traveling wave accelerators and standing wave accelerators. Traveling wave accelerators are mainly used in large accelerators, while standing wave accelerators have higher acceleration capabilities than traveling wave accelerators when they are shorter in length. Therefore, standing wave accelerators are more popular in miniaturized acceleration systems.

[0005] The standing wave accelerator mainly includes core components such as the modulator system, microwave system, and accelerating tube. The performance of these components often determines the stability of the accelerator system.

[0006] See also Figure 1 The electron accelerator in the prior art must be used in conjunction with a four-terminal circulator 2', and its original power source 1' generally uses a magnetron with a smaller volume and weight as a power source. The four-terminal circulator 2' can protect the original power source 1' and extend the service life of the original power source 1'.

[0007] See also Figure 1 The four-terminal circulator 2′ generally has four waveguide ports, one of which is connected to the original power source 1′, and the other waveguide port opposite thereto is connected to the original accelerating tube 4′. The other two waveguide ports are arranged on the side of the four-terminal circulator 2′, and are used to connect two original loads 3′, and the power of the original load 3′ close to the original accelerating tube 4′ is greater than the power of the original load 3′ far away from the original accelerating tube 4′. The original electron gun 6′ is arranged on the original accelerating tube 4′, and is used to emit electrons.

[0008] Since the standing wave accelerator is a narrowband microwave device, microwaves will have a large power reflection in the initial stage of entering the original accelerating tube 4'. If it is not used in conjunction with the four-terminal circulator 2', the power will return to the original power source 1', causing the performance of the original power source 1' to decline or even damage; when used in conjunction with the four-terminal circulator 2', the microwaves reflected from the original accelerating tube 4' will be absorbed by the original load 3' arranged on the side of the four-terminal circulator 2', ensuring that the microwaves will not be reflected to the original power source 1', thereby achieving the purpose of protecting the original power source 1'.

[0009] by Figure 1 Based on the orientation shown, the microwave direction of the existing electron accelerator is: from the original power source 1′ to the waveguide port of the four-end circulator 2′ close to the original power source 1′, then to the original accelerating tube 4′, and then reflected by the original accelerating tube 4′ to the original load 3′ close to the original accelerating tube 4′, and finally the remaining microwaves are absorbed by the original load 3′ far away from the original accelerating tube 4′.

[0010] However, the four-terminal circulator 2 ′ that can be used in conjunction with the electron accelerator has a large volume and weight, which increases the space required for the entire system and is inconvenient to move the four-terminal circulator 2 ′. Summary of the invention

[0011] The object of the present invention is to provide an electron accelerator to solve the technical problem of large volume of electron accelerators in the prior art.

[0012] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide an electron accelerator, including a power source, a load, a microwave distribution and synthesis device, a first accelerating tube and a second accelerating tube; the microwave distribution and synthesis device separates the microwaves input from the power source into a first path of microwaves and a second path of microwaves and transmits them to the first accelerating tube and the second accelerating tube; the microwave distribution and synthesis device synthesizes a third path of microwaves from the microwaves reflected from the first accelerating tube and the second accelerating tube, and the third path of microwaves is output to the load.

[0013] Furthermore, the power source and the load are connected to the first accelerating tube and the second accelerating tube through the microwave distribution synthesis device.

[0014] Furthermore, the microwave distribution synthesis device is a 3db bridge.

[0015] Furthermore, it also includes an electron gun, which is used to emit electrons to the first accelerating tube or the second accelerating tube.

[0016] Furthermore, it also includes a connecting pipe, and the connecting pipe is used to connect the first accelerating tube and the second accelerating tube.

[0017] Furthermore, the first accelerating tube and the second accelerating tube are standing wave accelerating tubes.

[0018] Furthermore, the power source is a magnetron or a klystron.

[0019] Furthermore, the load is a water load.

[0020] The electron accelerator provided by the present invention has the beneficial effects that, compared with the prior art, in the electron accelerator of the present invention, microwaves emitted from a power source are transmitted to a first accelerating tube and a second accelerating tube through a microwave distribution and synthesis device, and microwaves reflected by the first accelerating tube and the second accelerating tube are synthesized by the microwave distribution and synthesis device and then transmitted to a load and absorbed by the load, thereby effectively protecting the power source, extending the service life of the power source, reducing the difficulty of designing and manufacturing the first accelerating tube and the second accelerating tube, and the microwave distribution and synthesis device is smaller in size and weight than a four-end circulator, thereby reducing the size and weight of the electron accelerator and facilitating the movement of the electron accelerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 is a schematic diagram of the structure of an existing electron accelerator;

[0023] Figure 2 A schematic diagram of the structure of an electron accelerator provided in an embodiment of the present invention.

[0024] Among them, the reference numerals in the figure are:

[0025] 1′, original power source; 2′, four-terminal circulator; 3′, original load; 4′, original accelerating tube; 5′, original electron gun;

[0026] 1. Power source; 2. Microwave distribution and synthesis device; 3. Load; 4. First accelerating tube; 5. Second accelerating tube; 6. Electron gun; 7. Connecting pipe. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0029] See also Figure 1 and Figure 2The electron accelerator provided by the present invention is now described. The electron accelerator comprises a power source 1, a load 3, a microwave distribution and synthesis device 2, a first accelerating tube 4 and a second accelerating tube 5; the microwave distribution and synthesis device 2 separates the microwaves input from the power source 1 into a first microwave and a second microwave and transmits them to the first accelerating tube 4 and the second accelerating tube 5; the microwave distribution and synthesis device 2 synthesizes the microwaves reflected from the first accelerating tube 4 and the second accelerating tube 5 into a third microwave, and the third microwave is output to the load 3.

[0030] Compared with the prior art, the electron accelerator provided by the present invention is characterized in that microwaves emitted from a power source 1 are transmitted to a first accelerating tube 4 and a second accelerating tube 5 through a microwave distribution and synthesis device 2, and microwaves reflected by the first accelerating tube 4 and the second accelerating tube 5 are synthesized by the microwave distribution and synthesis device 2 and then transmitted to a load 3 and absorbed by the load 3, thereby effectively protecting the power source 1, extending the service life of the power source 1, and reducing the difficulty of designing and manufacturing the first accelerating tube 4 and the second accelerating tube 5. Moreover, compared with a four-end circulator 2′, the microwave distribution and synthesis device 2 has a smaller volume and weight, thereby reducing the volume and weight of the electron accelerator and facilitating the movement of the electron accelerator.

[0031] For further information, see Figure 2 As a specific embodiment of the electron accelerator provided by the present invention, the power source 1 and the load 3 are connected to the first accelerating tube 4 and the second accelerating tube 5 through the microwave distribution synthesis device 2 to transmit microwaves.

[0032] Furthermore, as a specific implementation of the electron accelerator provided by the present invention, the microwave distribution synthesis device 2 is a 3db bridge. The weight and volume of the 3db bridge are relatively small, which can effectively reduce the weight of the electron accelerator.

[0033] Specifically, the 3db bridge is a 3db coupler.

[0034] For further information, see Figure 2 As a specific embodiment of the electron accelerator provided by the present invention, it also includes an electron gun 6, which is used to emit electrons to the first accelerating tube 4 or the second accelerating tube 5, so that the electrons can be used to treat tumors, etc. after being accelerated in the first accelerating tube 4 and the second accelerating tube 5.

[0035] For further information, see Figure 2 As a specific embodiment of the electron accelerator provided by the present invention, it also includes a connecting pipe 7, which is used to connect the first accelerating tube 4 and the second accelerating tube 5 so that electrons can move between the first accelerating tube 4 and the second accelerating tube 5. At the same time, the connecting pipe 7 also has the function of isolating microwaves.

[0036] Furthermore, as a specific implementation of the electron accelerator provided by the present invention, the first accelerating tube 4 and the second accelerating tube 5 are standing wave accelerating tubes with strong acceleration capability.

[0037] Furthermore, as a specific implementation of the electron accelerator provided by the present invention, the power source 1 is a magnetron or a klystron, which is used to emit microwaves to accelerate the electrons in the first accelerating tube 4 and the second accelerating tube 5 .

[0038] Furthermore, as a specific implementation of the electron accelerator provided by the present invention, the load 3 is a water load, which has a good microwave absorption effect.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electron accelerator, comprising a power source and a load, characterized in that: The invention also includes a microwave distribution and synthesis device, a first accelerating tube and a second accelerating tube; the microwave distribution and synthesis device separates the microwaves input from the power source into a first microwave and a second microwave and transmits the microwaves to the first accelerating tube and the second accelerating tube; the microwave distribution and synthesis device synthesizes a third microwave from the microwaves reflected from the first accelerating tube and the second accelerating tube, and the third microwave is output to the load; The power source and the load are connected to the first accelerating tube and the second accelerating tube through the microwave distribution synthesis device; The microwave distribution synthesis device is a 3db bridge; It also includes an electron gun, which is used to emit electrons to the first accelerating tube or the second accelerating tube; It also includes a connecting pipe, wherein the connecting pipe is used to connect the first accelerating tube and the second accelerating tube; The first accelerating tube and the second accelerating tube are standing wave accelerating tubes; The power source is a magnetron or a klystron; The load is a water load.

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