Dual-energy electron irradiation accelerator structure

Abstract

The embodiment of the invention provides a dual-energy electron irradiation accelerator structure. The dual-energy electron irradiation accelerator structure comprises an accelerating tube, a klystron, an accelerating tube electron gun, a klystron electron gun, a first output assembly and a second output assembly. And the accelerating tube is communicated with the klystron. The accelerating tube electron gun is arranged at one end of the accelerating tube. The klystron electron gun is arranged at one end of the klystron. The first output assembly is arranged at the other end of the accelerating tube and used for outputting the first electron beam from the accelerating tube. The second output assembly is arranged at the other end of the klystron and used for outputting the second electron beam from the klystron. The dual-energy electron irradiation accelerator structure provided by the embodiment of the invention is high in electron beam utilization efficiency.

Description

Technical Field

[0001] The present application relates to the field of irradiation technology, and in particular to a dual-energy electron irradiation accelerator structure. Background Art

[0002] In the related art, the high-energy electron irradiation accelerator uses a klystron to provide power to the accelerating tube to establish a microwave electric field to accelerate the electron beam. During the acceleration process, the electron beam velocity and the microwave phase velocity must be kept consistent to achieve synchronous acceleration, so the energy of the beam at the exit of the accelerating tube can only be adjusted within a small range. The klystron uses the density modulation of the electron beam to amplify the microwave signal of the excitation source. The power efficiency of the klystron does not reach 100%, so there is still residual power in the exit electron beam of the klystron interaction section. In the related art, the collector cooling structure is usually used to absorb the residual power of the electron beam, and the utilization efficiency of the electron beam is low. Summary of the invention

[0003] In view of this, the main purpose of the embodiments of the present application is to provide a dual-energy electron irradiation accelerator structure with high electron beam utilization efficiency.

[0004] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0005] The embodiment of the present application provides a dual-energy electron irradiation accelerator structure, including:

[0006] Accelerator tube;

[0007] a klystron, the accelerating tube being in communication with the klystron;

[0008] An accelerating tube electron gun, wherein the accelerating tube electron gun is arranged at one end of the accelerating tube;

[0009] A klystron electron gun, wherein the klystron electron gun is arranged at one end of the klystron;

[0010] a first output component, which is disposed at the other end of the accelerating tube and is used to output a first electron beam from the accelerating tube;

[0011] A second output component is arranged at the other end of the klystron to output a second electron beam from the klystron.

[0012] In one embodiment, the second output assembly includes a deflection member, at least a portion of which is disposed at an end of the klystron away from the klystron electron gun, so as to deflect an emission direction of the second electron beam relative to an incident direction of the second electron beam.

[0013] In one embodiment, the deflection member cooperates with the accelerating tube so that the emission direction of the second electron beam is consistent with the emission direction of the first electron beam.

[0014] In one embodiment, the klystron extends along a first direction, the klystron electron gun is arranged on a side of the klystron away from the first direction, the second output assembly includes two deflection members, the two deflection members are spaced and symmetrically arranged along the second direction, and one of the two deflection members is arranged at an end of the klystron away from the klystron electron gun, so that the emission direction of the second electron beam is opposite to the incident direction of the second electron beam; wherein the first direction is perpendicular to the second direction.

[0015] In one embodiment, the accelerating tube is parallel to the klystron, and the accelerating tube electron gun is arranged on one side of the accelerating tube along the first direction, so that the emission direction of the second electron beam is consistent with the emission direction of the first electron beam.

[0016] In one embodiment, the deflection element has a slit, and the second electron beam passes through the slit and is emitted from the deflection element.

[0017] In one embodiment, the angle at which the deflection member deflects the second electron beam is 270°; and / or,

[0018] The deflection element is an alpha magnet.

[0019] In one embodiment, the deflection member includes a magnet yoke and an excitation coil, the magnet yoke encloses a receiving cavity, and the excitation coil is disposed in the receiving cavity.

[0020] In one embodiment, the dual-energy electron irradiation accelerator structure further includes two scanning magnets, and the two scanning magnets are respectively arranged at the exit port of the first output component and the exit port of the second output component.

[0021] In one embodiment, the dual-energy electron irradiation accelerator structure further includes a waveguide, wherein the waveguide is connected to the accelerating tube and the klystron respectively; and / or,

[0022] The first electron beam is a high-energy electron beam; and / or,

[0023] The second electron beam is a low-energy electron beam.

[0024] The embodiment of the present application provides a dual-energy electron irradiation accelerator structure, which includes an accelerating tube, a klystron, an accelerating tube electron gun, a klystron electron gun, a first output assembly, and a second output assembly. The accelerating tube is connected to the klystron. The accelerating tube electron gun is arranged at one end of the accelerating tube. The klystron electron gun is arranged at one end of the klystron. The first output assembly is arranged at the other end of the accelerating tube for outputting a first electron beam from the accelerating tube. The second output assembly is arranged at the other end of the klystron for outputting a second electron beam from the klystron. Thus, on the one hand, the dual-energy electron irradiation accelerator structure can simultaneously realize high-energy and low-energy electron beam irradiation applications, expand the application scope of a single accelerator, reduce the introduction of multiple devices, and reduce construction costs. On the other hand, by arranging the second output assembly at one end of the klystron away from the klystron electron gun, the second output assembly uses the low-energy electron beam drawn by the klystron for low-energy irradiation, effectively improving the utilization efficiency of the low-energy electron beam and reducing the overall power loss of the klystron operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of a dual-energy electron irradiation accelerator structure according to an embodiment of the present application;

[0026] Figure 2 This is a schematic structural diagram of a deflection member according to an embodiment of the present application;

[0027] Figure 3 This is a schematic diagram of the structure of an α magnet according to an embodiment of the present application;

[0028] Figure 4 This is a schematic diagram of the distribution of magnetic induction intensity of an α magnet with a 270° deflection and a dispersion-free state according to an embodiment of the present application.

[0029] Description of Reference Numerals

[0030] 10. Accelerator tube; 20. Klystron; 30. Accelerator tube electron gun; 40. Klystron electron gun; 50. First output assembly; 60. Second output assembly; 61. Deflection element; 61a. Slit; 62. Magnet yoke; 63. Excitation coil; 70. Scanning magnet; 80. Waveguide. DETAILED DESCRIPTION

[0031] In this application, the orientation or position relationship between the "first direction" and the "second direction" is based on the attached Figure 1 It should be understood that these directional terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0032] An embodiment of the present application provides a dual-energy electron irradiation accelerator structure. Figure 1 The dual-energy electron irradiation accelerator structure includes an accelerating tube 10 , a klystron 20 , an accelerating tube electron gun 30 , a klystron electron gun 40 , a first output assembly 50 and a second output assembly 60 .

[0033] The accelerating tube 10 is communicated with the klystron 20 .

[0034] The accelerating tube electron gun 30 is disposed at one end of the accelerating tube 10 .

[0035] The klystron electron gun 40 is disposed at one end of the klystron 20 .

[0036] The first output assembly 50 is disposed at the other end of the accelerating tube 10 to output the first electron beam from the accelerating tube 10 .

[0037] The second output assembly 60 is disposed at the other end of the klystron 20 to output the second electron beam from the klystron 20 .

[0038] Specifically, the accelerating tube 10 refers to a component that can accelerate an electron beam by using an electric field, thereby accelerating electrons from lower energy to higher energy.

[0039] The klystron 20 refers to a microwave electron tube capable of generating high-frequency power.

[0040] The klystron 20 provides microwave energy for the accelerating tube 10 , and generates microwaves of specific frequency and power through the interaction between the internal electron beam and the high-frequency electromagnetic field, thereby driving the accelerating tube 10 to accelerate the electrons.

[0041] The klystron 20 is in communication with the accelerating tube 10 , so that the microwave energy generated by the klystron 20 is transferred to the accelerating tube 10 .

[0042] The communication mode between the klystron 20 and the accelerating tube 10 is not limited.

[0043] Exemplarily, the dual-energy electron irradiation accelerator structure further includes a waveguide 80, which is connected to the accelerating tube 10 and the klystron 20. Thus, the loss of high-frequency microwave energy in the klystron 20 during transmission to the accelerating tube 10 can be reduced.

[0044] The accelerating tube electron gun 30 and the klystron electron gun 40 refer to components capable of generating electron beams.

[0045] The klystron 20 performs density modulation on the electron beam generated by the klystron electron gun 40, and the modulated electron beam is output through the second output assembly 60 for low-energy irradiation.

[0046] The first output assembly 50 refers to a component for guiding and outputting the first electron beam from the accelerating tube 10 .

[0047] The second output assembly 60 refers to a component for guiding and outputting the second electron beam from the klystron 20 .

[0048] The type of the first electron beam is not limited.

[0049] For example, the first electron beam is a high energy electron beam.

[0050] The type of the second electron beam is not limited.

[0051] For example, the second electron beam is a low-energy electron beam.

[0052] The electrons generated by the accelerating tube electron gun 30 are accelerated to the energy of mega-electron volts in the accelerating tube 10, and a high-energy electron beam is output through the first output component 50. A part of the electrons generated by the klystron electron gun 40 are converted into microwave power through the modulation of the interaction section of the klystron 20, and are fed into the accelerating tube 10 through the waveguide 80 to establish a microwave electric field for the accelerating tube 10 to accelerate the high-energy electron beam. The other part of the remaining power follows the electron beam and is output as a low-energy electron beam through the second output component 60. In this way, one accelerator structure is realized to realize high-energy and low-energy electron beam irradiation applications at the same time.

[0053] An embodiment of the present application provides a dual-energy electron irradiation accelerator structure, which includes an accelerating tube 10, a klystron 20, an accelerating tube electron gun 30, a klystron electron gun 40, a first output assembly 50, and a second output assembly 60. The accelerating tube 10 is connected to the klystron 20. The accelerating tube electron gun 30 is arranged at one end of the accelerating tube 10. The klystron electron gun 40 is arranged at one end of the klystron 20. The first output assembly 50 is arranged at the other end of the accelerating tube 10 to output a first electron beam from the accelerating tube 10. The second output assembly 60 is arranged at the other end of the klystron 20 to output a second electron beam from the klystron 20. Therefore, on the one hand, the dual-energy electron irradiation accelerator structure can simultaneously realize high-energy and low-energy electron beam irradiation applications, expand the application range of a single accelerator, reduce the introduction of multiple devices, and reduce construction costs. On the other hand, by arranging a second output assembly 60 at the end of the klystron 20 away from the klystron electron gun 40, the second output assembly 60 uses the low-energy electron beam drawn out by the klystron 20 to perform low-energy irradiation, thereby effectively improving the utilization efficiency of the low-energy electron beam and reducing the overall power loss of the klystron 20 during operation.

[0054] In one embodiment, please refer to Figure 1 and Figure 2The second output assembly includes a deflection member 61, at least a portion of which is disposed at an end of the klystron 20 away from the klystron electron gun 40, so as to deflect the emission direction of the second electron beam relative to the incident direction of the second electron beam. Thus, by changing the emission direction of the second electron beam through the deflection member 61, the irradiation direction of the second electron beam can be controlled so that the target object can be accurately irradiated.

[0055] Specifically, when the second electron beam passes through the deflection element 61 , its emission direction will change relative to the incident direction.

[0056] The deflecting member 61 refers to a component capable of changing the moving direction of the second electron beam.

[0057] The angle at which the deflection element 61 deflects the second electron beam is determined according to actual conditions.

[0058] For example, the deflection element 61 deflects the second electron beam by an angle of 270°.

[0059] The number of the deflection members 61 is not limited.

[0060] For example, there are one or more deflection members 61. Therefore, the emission direction of the second electron beam can be flexibly adjusted according to different irradiation targets and working conditions by adjusting the deflection angle of the deflection member 61.

[0061] The deflection member 61 has any structural type, as long as it can change the emission direction of the second electron beam.

[0062] Exemplarily, the deflection member 61 is an alpha magnet.

[0063] Exemplarily, after the electron beam generated by the klystron electron gun 40 is modulated by the interaction section of the klystron 20, the beam energy dispersion of the second electron beam becomes larger, and when passing through the deflection element 61, the beam diverges due to the energy dispersion. Therefore, the deflection element 61 also includes an achromatic structure, and the achromatic deflection of the second electron beam is achieved through polar surface function optimization, so that the maximum value of the energy dispersion curve is at the center of the deflection element 61, thereby achieving achromatic deflection from an overall perspective.

[0064] In one embodiment, please refer to Figure 1 and Figure 2 , the deflection member 61 cooperates with the accelerating tube 10 to make the emission direction of the second electron beam consistent with the emission direction of the first electron beam. Therefore, when performing the irradiation operation, only one direction needs to be aimed and controlled, and there is no need to consider different irradiation directions of electron beams with different energies, which simplifies the operation process during the irradiation process.

[0065] Specifically, the deflection element 61 cooperates with the accelerating tube 10 in that, according to the direction of the first electron beam output by the accelerating tube 10, by adjusting the deflection element 61, the second electron beam output by the klystron 20 is deflected by the deflection element 61 and its emission direction is consistent with the emission direction of the first electron beam.

[0066] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 4 The klystron 20 extends along a first direction, the klystron electron gun 40 is arranged on a side of the klystron 20 away from the first direction, and the second output assembly 60 includes two deflection members 61, the two deflection members 61 are spaced and symmetrically arranged along a second direction, and one of the two deflection members 61 is arranged at one end of the klystron 20 away from the klystron electron gun 40, so that the emission direction of the second electron beam is opposite to the incident direction of the second electron beam; wherein the first direction is perpendicular to the second direction. Thus, the second electron beam modulated by the klystron 20 is deflected and led out by the deflection member 61 arranged at the end of the klystron 20 away from the klystron electron gun 40, and the led out second electron beam is deflected by another deflection member 61, so that the emission direction of the second electron beam is opposite to the incident direction of the second electron beam, thereby enabling the second electron beam to accurately irradiate the target object.

[0067] Specifically, the klystron electron gun 40 is disposed on the side of the klystron 20 away from the first direction, which means that the klystron 20 extends along the first direction, and the klystron electron gun 40 is disposed at the bottom of the klystron 20 .

[0068] One of the two deflection members 61 is disposed at an end of the klystron 20 away from the klystron electron gun 40 , which means that the klystron 20 extends along the first direction, and one of the deflection members 61 is disposed at the top of the klystron 20 .

[0069] It can be understood that the klystron electron gun 40 and one of the deflection members 61 are disposed at opposite ends of the klystron 20 , respectively.

[0070] The second electron beam modulated by the klystron 20 is emitted from the klystron 20 along the first direction, and is deflected and led out by one of the two deflection elements 61, so that the second electron beam moves along the second direction. The deflected and led out second electron beam is deflected by the other deflection element 61, so that the second electron beam moves in a direction opposite to the first direction, thereby making the emission direction of the second electron beam opposite to the incident direction of the second electron beam.

[0071] The two deflection members 61 are spaced apart and symmetrically arranged along the second direction, which means that the two deflection members 61 are symmetrically distributed in the second direction relative to the center line of the distance between the two deflection members 61. That is, after the second electron beam is deflected by a certain angle through the first deflection member 61, due to the symmetrical position relationship of the second deflection member 61, the second deflection member 61 can perform reverse and complementary deflection on the electron beam.

[0072] Exemplarily, the deflection angle of the electron beam by the two deflection elements 61 is 270°. The second electron beam modulated by the klystron 20 is emitted toward the first deflection element 61 along the first direction. The first deflection element 61 deflects the second electron beam by 270° and leads it out. The second electron beam after being led out is emitted toward the second deflection element 61 along the second direction. The second deflection element 61 deflects the second electron beam by 270° again, so that the second electron beam is emitted toward the side away from the first direction. Thus, the emission direction of the second electron beam is opposite to the incident direction of the second electron beam.

[0073] In one embodiment, please refer to Figure 1 and Figure 2 The accelerating tube 10 is parallel to the klystron 20, and the accelerating tube electron gun 30 is arranged on one side of the accelerating tube 10 along the first direction, so that the emission direction of the second electron beam is consistent with the emission direction of the first electron beam. Therefore, when performing the irradiation operation, only one direction needs to be aimed and controlled, and there is no need to consider different irradiation directions of electron beams with different energies respectively, which simplifies the operation process during the irradiation process.

[0074] Specifically, the accelerating tube electron gun 30 is arranged on one side of the accelerating tube 10 along the first direction, which means that the accelerating tube 10 extends along the first direction, the accelerating tube electron gun 30 is arranged on the top of the accelerating tube 10, and the emission direction of the first electron beam is opposite to the first direction.

[0075] The emission direction of the second electron beam in the klystron 20 is the same as the first direction. After being deflected by the deflection member 61, the emission direction of the second electron beam through the second output assembly 60 is opposite to the first direction. In other words, the emission direction of the first electron beam output through the first output assembly 50 is the same as the emission direction of the second electron beam output through the second output assembly 60.

[0076] In one embodiment, please refer to Figure 2 The deflection member 61 has a slit 61a, and the second electron beam passes through the slit 61a and is emitted from the deflection member 61. Therefore, the beam energy of the second electron beam is selected through the energy selection function of the slit 61a, thereby adjusting the energy dispersion distribution of the second electron beam, and realizing the control of the irradiation process and penetration depth of the second electron beam.

[0077] Specifically, the slit 61 a refers to a narrow and elongated slit hole with adjustable width in the deflecting member 61 .

[0078] The size and shape of the slit 61a are not limited as long as they can allow the second electron beam to pass through and can filter the second electron beam.

[0079] The position where the slit 61a is provided is not limited.

[0080] For example, the slit 61a is arranged at the maximum position of the beam energy dispersion of the second electron beam, thereby reducing the mutual collision and interference between particles in the beam of the second electron beam, thereby reducing the probability of energy loss and scattering, and improving the quality and stability of the beam of the second electron beam.

[0081] In one embodiment, please refer to Figure 2 and Figure 3 The deflection member 61 includes a magnet iron yoke 62 and an excitation coil 63. The magnet iron yoke 62 encloses a receiving cavity, and the excitation coil 63 is arranged in the receiving cavity. Therefore, by adjusting the current intensity of the excitation coil 63 to adjust the intensity and direction of the generated magnetic field, the beam trajectory of the second electron beam is adjusted to achieve the transmission and matching of the beam of the second electron beam.

[0082] Specifically, the position of the excitation coil 63 is not limited. For example, the excitation coil 63 is disposed on one side of the accommodation cavity close to the magnet yoke 62 .

[0083] The number of the excitation coils 63 is not limited, and can be one or two or more.

[0084] Exemplarily, two excitation coils 63 are arranged on opposite sides of the accommodating cavity near the magnet iron yoke 62. Thus, by adjusting the current intensity of the two excitation coils 63 respectively, the magnetic field intensity between the excitation coils 63 is adjusted, thereby adjusting the trajectory of the beam current of the second electron beam entering the magnetic field.

[0085] In one embodiment, please refer to Figure 1 The dual-energy electron irradiation accelerator structure further includes two scanning magnets 70, which are respectively arranged at the exit of the first output assembly 50 and the exit of the second output assembly 60. Thus, the beam current of the first electron beam and the beam current of the second electron beam are periodically scanned by the scanning magnets 70, thereby achieving uniform irradiation of the goods.

[0086] In the description of the present application, the description with reference to the terms "in one embodiment", "in some embodiments", "in a specific embodiment", or "exemplary" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0087] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A dual-energy electron irradiation accelerator structure, characterized in that: include: Accelerator tube; a klystron, the accelerating tube being in communication with the klystron; An accelerating tube electron gun, wherein the accelerating tube electron gun is arranged at one end of the accelerating tube; A klystron electron gun, wherein the klystron electron gun is arranged at one end of the klystron; a first output component, which is disposed at the other end of the accelerating tube and is used to output a first electron beam from the accelerating tube; A second output component is arranged at the other end of the klystron to output a second electron beam from the klystron.

2. The dual-energy electron irradiation accelerator structure according to claim 1, characterized in that: The second output assembly comprises a deflection member, at least a portion of which is disposed at an end of the klystron away from the klystron electron gun, so as to deflect an emission direction of the second electron beam relative to an incident direction of the second electron beam.

3. The dual-energy electron irradiation accelerator structure according to claim 2, characterized in that: The deflection member cooperates with the accelerating tube so that the emission direction of the second electron beam is consistent with the emission direction of the first electron beam.

4. The dual-energy electron irradiation accelerator structure according to claim 2 or 3, characterized in that: The klystron extends along a first direction, the klystron electron gun is arranged on a side of the klystron away from the first direction, the second output assembly includes two deflection members, the two deflection members are spaced and symmetrically arranged along a second direction, and one of the two deflection members is arranged at an end of the klystron away from the klystron electron gun, so that the emission direction of the second electron beam is opposite to the incident direction of the second electron beam; wherein the first direction is perpendicular to the second direction.

5. The dual-energy electron irradiation accelerator structure according to claim 4, characterized in that: The accelerating tube is parallel to the klystron, and the accelerating tube electron gun is arranged on one side of the accelerating tube along the first direction, so that the emission direction of the second electron beam is consistent with the emission direction of the first electron beam.

6. The dual-energy electron irradiation accelerator structure according to claim 2, characterized in that: The deflecting member has a slit, and the second electron beam passes through the slit and is emitted from the deflecting member.

7. The dual-energy electron irradiation accelerator structure according to claim 2 or 3, characterized in that: The angle at which the deflection member deflects the second electron beam is 270°; and / or, The deflection element is an alpha magnet.

8. The dual-energy electron irradiation accelerator structure according to claim 2 or 3, characterized in that: The deflection member comprises a magnet yoke and an excitation coil. The magnet yoke is enclosed to form an accommodating cavity, and the excitation coil is arranged in the accommodating cavity.

9. The dual-energy electron irradiation accelerator structure according to any one of claims 1 to 3, characterized in that: The dual-energy electron irradiation accelerator structure further includes two scanning magnets, which are respectively arranged at the exit port of the first output component and the exit port of the second output component.

10. The dual-energy electron irradiation accelerator structure according to any one of claims 1 to 3, characterized in that: The dual-energy electron irradiation accelerator structure further includes a waveguide, wherein the waveguide is connected to the accelerating tube and the klystron respectively; and / or, The first electron beam is a high-energy electron beam; and / or, The second electron beam is a low-energy electron beam.

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