Linear accelerator based on high-gradient traveling wave acceleration structure

Abstract

The invention relates to the technical field of accelerators, and discloses a linear accelerator based on a high-gradient traveling wave acceleration structure. The linear accelerator comprises a first power source system, a first power divider and two first acceleration structures. The first power source system is used for providing pulse microwave power; an input port of the first power divider is connected with the first power source system and is used for outputting at least two paths of pulse microwave power; a first output port of the first power divider is connected with an input port of the first first acceleration structure and is used for feeding one path of pulse microwave power into the first first acceleration structure; and a second output port of the first power divider is connected with an input port of the second first acceleration structure and is used for feeding the other path of pulse microwave power into the second first acceleration structure. According to the linear accelerator, the first power divider is arranged, so that the number of the first power source systems can be reduced, and the defect that in the prior art, the power source cost of a linear accelerator based on a traveling wave acceleration structure is high is overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of accelerators, and in particular to a linear accelerator based on a high-gradient traveling wave acceleration structure. Background Art

[0002] The high-gradient acceleration structure is one of the advanced technologies in the field of accelerator technology in the world because it can greatly shorten the length of the linear accelerator, thereby reducing the cost of the entire linear accelerator. The high-gradient acceleration structure is usually divided into a standing wave structure and a traveling wave structure.

[0003] The standing wave structure requires a lower microwave power to be fed in, but the filling time is longer, and generally a longer microwave pulse is required. Due to the microwave thermal effect, its application at high repetition frequency is limited. The traveling wave structure is equivalent to a waveguide device, so its filling time is shorter. Since the microwave is fed in except for the field building power in the cavity, the rest is usually absorbed by the dummy load through the output coupler, and its feeding peak power is usually higher. Because the traveling wave structure can operate at a shorter pulse length, it can meet the needs of high repetition frequency. For the traveling wave acceleration structure, the peak power of the microwave power source required is usually higher, a part of which is used for cavity loss, and the remaining power is absorbed by the dummy load, which results in a waste of microwave power. Moreover, for the entire accelerator power source system, the power source cost of the traveling wave acceleration structure is generally higher.

[0004] Therefore, how to reduce the power source cost of linear accelerators based on traveling wave acceleration structures is an issue that the industry needs to solve urgently. Summary of the invention

[0005] The present invention provides a linear accelerator based on a high-gradient traveling wave acceleration structure, so as to solve the defect of high power source cost of the linear accelerator based on the traveling wave acceleration structure in the prior art.

[0006] The present invention provides a linear accelerator based on a high-gradient traveling wave acceleration structure, comprising a first linear acceleration module; the first linear acceleration module comprises: A first power source system, for providing pulsed microwave power; A first power distributor, wherein an input port of the first power distributor is connected to the first power source system and is used to output at least two pulse microwave powers; Two first acceleration structures, the first output port of the first power distributor is connected to the input port of the first first acceleration structure, so as to feed one path of the pulsed microwave power into the first first acceleration structure; the second output port of the first power distributor is connected to the input port of the second first acceleration structure, so as to feed another path of the pulsed microwave power into the second first acceleration structure.

[0007] According to the linear accelerator based on the high-gradient traveling wave acceleration structure provided by the present invention, the output port of the first said accelerating structure is connected to the input port of the second said said accelerating structure.

[0008] According to the linear accelerator based on the high-gradient traveling wave acceleration structure provided by the present invention, the first linear acceleration module further includes: A first phase shifter and a second phase shifter; A first power combiner, the first phase shifter is arranged at the input port of the first power combiner, and the second phase shifter is arranged at the output port of the first power combiner; the second output port of the first power distributor and the output port of the first first acceleration structure are connected to the input port of the second first acceleration structure through the first power combiner.

[0009] The linear accelerator based on the high-gradient traveling wave acceleration structure provided by the present invention further includes at least one second linear acceleration module, wherein the second linear acceleration module includes: A second power source system for providing pulsed microwave power; A second power distributor, the input port of which is connected to the second power source system and is used to output at least two pulse microwave powers; Two second acceleration structures, the first output port of the second power distributor and the output port of the second first acceleration structure are both connected to the input port of the first second acceleration structure; the second output port of the second power distributor and the output port of the first second acceleration structure are both connected to the input port of the second second acceleration structure.

[0010] According to the linear accelerator based on the high-gradient traveling wave acceleration structure provided by the present invention, the second linear acceleration module further includes: at least one third power distributor, wherein an input port of the third power distributor is connected to a second output port of the second power distributor; At least three second accelerating structures, the first output port of the third power distributor and the output port of the first second accelerating structure are both connected to the input port of the second second accelerating structure; the second output port of the third power distributor and the output port of the second second accelerating structure are both connected to the input port of the third second accelerating structure.

[0011] The linear accelerator based on the high-gradient traveling wave acceleration structure provided by the present invention comprises at least two second linear acceleration modules; the output port of the third second acceleration structure of one of the second linear acceleration modules is connected to the input port of the first second acceleration structure of another second linear acceleration module.

[0012] According to the linear accelerator based on the high-gradient traveling wave acceleration structure provided by the present invention, the second linear acceleration module further includes: at least three second power combiners corresponding one to each of the second accelerating structures; at least three third phase shifters corresponding one to each of the second power combiners; the third phase shifters are arranged at the input ports of the corresponding second power combiners; At least three fourth phase shifters correspond one to one with the second power combiners; the fourth phase shifters are arranged at the output ports of the corresponding second power combiners.

[0013] According to the linear accelerator based on the high-gradient traveling wave acceleration structure provided by the present invention, the first linear acceleration module further includes: at least one fourth power distributor, wherein an input port of the fourth power distributor is connected to the second output port of the first power distributor; At least three of the first accelerating structures, the first output port of the fourth power distributor and the output port of the first first accelerating structure are both connected to the input port of the second first accelerating structure, and the second output port of the fourth power distributor is connected to the output port of the third first accelerating structure.

[0014] According to the linear accelerator based on the high-gradient traveling wave acceleration structure provided by the present invention, the input port of the first acceleration structure is provided with an input coupler, and the output port of the first acceleration structure is provided with an output coupler.

[0015] According to the linear accelerator based on the high-gradient traveling wave acceleration structure provided by the present invention, the first power source system includes a first power source and a first klystron; the output end of the first power source is connected to the input port of the first power distributor through the first klystron.

[0016] The linear accelerator based on the high-gradient traveling wave acceleration structure provided by the present invention can divide the pulsed microwave power output by the first power source system into at least two paths by setting a first power divider, and the two paths of pulsed microwave power are respectively fed into two first acceleration structures. Obviously, compared with the traditional linear accelerator based on the traveling wave acceleration structure, the linear accelerator based on the high-gradient traveling wave acceleration structure provided by the present invention can make the number of first power source systems less than the number of first acceleration structures, thereby reducing the cost of the entire linear accelerator, and solving the defect of high power source cost of the linear accelerator based on the traveling wave acceleration structure in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a linear accelerator based on a high-gradient traveling wave acceleration structure provided by the present invention.

[0019] Reference numerals: 100, first linear acceleration module; 110, first power source system; 111, first power source; 112, first klystron; 120, first power distributor; 130, first acceleration structure; 140, first phase shifter; 150, second phase shifter; 160, first power combiner; 200, second linear acceleration module; 210, second power source system; 211, second power source; 212, second klystron; 220, second power distributor; 230, second acceleration structure; 240, third power distributor; 250, second power combiner; 260, third phase shifter; 270, fourth phase shifter; 300. Signal generator. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The existing linear accelerator based on high-gradient traveling wave acceleration structure includes multiple sets of power sources and multiple sets of high-gradient traveling wave acceleration structures; the power sources correspond to the high-gradient traveling wave acceleration structures one by one, in other words, one set of power sources corresponds to one set of high-gradient traveling wave acceleration structures; specifically, the power sources are connected to the corresponding high-gradient traveling wave acceleration structures through klystrons, which are used to feed microwave power into the high-gradient traveling wave acceleration structures. The number of power sources and klystrons required for such linear accelerators is large, which makes the cost of the entire linear accelerator high. In addition, part of the microwave power fed into the high-gradient traveling wave acceleration structure is lost in the cavity of the acceleration structure to establish the required electric field, and the other part is transmitted to the outside of the cavity through the output coupler and absorbed by the dummy load, resulting in a waste of microwave power. Because the peak power fed into the high-gradient traveling wave acceleration structure is high, firstly, the price of the entire power source is expensive, and secondly, usually 50% of the microwave power is absorbed by the dummy load, resulting in a large loss, which makes the price of the power source system of the entire accelerator high.

[0022] In order to solve at least one of the problems existing in the prior art, such as Figure 1 As shown, the present invention provides a linear accelerator based on a high gradient traveling wave acceleration structure. The linear accelerator based on a high gradient traveling wave acceleration structure comprises a first linear acceleration module 100, and the first linear acceleration module 100 comprises a first power source system 110, a first power distributor 120 and two first acceleration structures 130.

[0023] Among them, the first power source system 110 is used to provide pulsed microwave power; the input port of the first power distributor 120 is connected to the first power source system 110, and is used to output at least two pulsed microwave powers; the first output port of the first power distributor 120 is connected to the input port of the first first acceleration structure 130, and is used to feed one pulsed microwave power into the first first acceleration structure 130; the second output port of the first power distributor 120 is connected to the input port of the second first acceleration structure 130, and is used to feed another pulsed microwave power into the second first acceleration structure 130.

[0024] In this embodiment, by setting up the first power distributor 120, the pulse microwave power output by the first power source system 110 can be divided into at least two paths, and the two paths of pulse microwave power are respectively fed into two first acceleration structures 130. Obviously, compared with the traditional linear accelerator, the linear accelerator of this embodiment can make the number of first power source systems 110 less than the number of first acceleration structures 130, thereby reducing the cost of the entire linear accelerator and solving the defect of high power source cost of the linear accelerator based on the traveling wave acceleration structure in the prior art.

[0025] It can be understood that the first accelerating structure 130 in this embodiment can be a high-gradient traveling wave accelerating structure.

[0026] It can be understood that the first power divider 120 can be used to divide the pulse microwave power provided by the first power source system 110 into two parts, three parts, four parts or five parts, etc., and in this embodiment, there is no limit on the number of pulse microwave powers divided by the first power divider 120. Preferably, the first power divider 120 can be used to divide the pulse microwave power provided by the first power source system 110 into two parts.

[0027] It should be noted that each portion of the pulsed microwave power output from the first power distributor 120 can be fed into the corresponding first accelerating structure 130 .

[0028] Furthermore, the output port of the first first accelerating structure 130 is connected to the input port of the second first accelerating structure 130. With such a design, the pulsed microwave power in the first accelerating structure 130 that is not used to establish the required electric field can be fed into the second first accelerating structure 130 for secondary use, thereby avoiding waste of microwave power and reducing the price of a single first power source system 110, thereby reducing the cost of the entire linear accelerator.

[0029] Furthermore, the first linear acceleration module 100 further includes a first phase shifter 140, a second phase shifter 150 and a first power synthesizer 160; the first phase shifter 140 is arranged at the input port of the first power synthesizer 160, and the second phase shifter 150 is arranged at the output port of the first power synthesizer 160; the second output port of the first power distributor 120 and the output port of the first first acceleration structure 130 are connected to the input port of the second first acceleration structure 130 through the first power synthesizer 160. Specifically, the first power distributor 120 outputs two pulse microwave powers, one pulse microwave power is directly fed into the first first acceleration structure 130, and the other pulse microwave power is phase-shifted by the first phase shifter 140, and is fed into the second first acceleration structure 130 through the first power synthesizer 160 and the second phase shifter 150 in sequence with the output port of the first first acceleration structure 130. Such a design can not only fully utilize the pulse microwave power, improve the utilization efficiency of microwave power, reduce the number of first power source systems 110, and reduce the cost of the linear accelerator; at the same time, it can also ensure that the phase of the microwave power entering the second first acceleration structure 130 is synchronized with the accelerated particles.

[0030] Furthermore, an input coupler is provided at the input port of the first accelerating structure 130, and an output coupler is provided at the output port of the first accelerating structure 130. Specifically, the first output port of the first power distributor 120 is connected to the input port of the first first accelerating structure 130 through the input coupler, and the output port of the first first accelerating structure 130 is connected to the second output port of the first power distributor 120 through the output coupler, and then fed into the cavity of the second first accelerating structure 130 through the input coupler of the second first accelerating structure 130 after passing through the first power combiner 160.

[0031] Further, the first power source system 110 includes a first power source 111 and a first klystron 112; the output end of the first power source 111 is connected to the input port of the first power distributor 120 through the first klystron 112. Specifically, the input port of the first power source 111 is used to connect to the signal generator 300, and the output port of the first power source 111 is connected to the input port of the first power distributor 120 through the first klystron 112, so as to provide pulse microwave power to the first power distributor 120. In this embodiment, through the setting of the first power distributor 120, pulse microwave power can be provided to the new first acceleration structure 130, thereby making full use of microwave power, reducing the number of klystrons, and reducing costs.

[0032] Furthermore, the first linear acceleration module 100 also includes at least one fourth power distributor and at least three first acceleration structures 130; the input port of the fourth power distributor is connected to the second output port of the first power distributor 120; the first output port of the fourth power distributor and the output port of the first first acceleration structure 130 are both connected to the input port of the second first acceleration structure 130, and the second output port of the fourth power distributor is connected to the output port of the third first acceleration structure 130.

[0033] In this embodiment, a fourth power distributor can be provided to realize redistribution of the pulse microwave power output from the second output port of the first power distributor 120, thereby increasing the number of first acceleration structures 130 without increasing the number of first power source systems 110, thereby further reducing the cost of the linear accelerator.

[0034] Specifically, the first output port of the first power distributor 120 is connected to the input port of the first first acceleration structure 130, and the second output port of the first power distributor 120 is connected to the input port of the fourth power distributor; the first output port of the fourth power distributor and the output port of the first first acceleration structure 130 are fed into the second first acceleration structure 130 through the corresponding first power synthesizer 160; the second output port of the fourth power distributor and the output port of the second first acceleration structure 130 are fed into the third first acceleration structure 130 through the corresponding first power synthesizer 160; the output port of the third first acceleration structure 130 can be used to connect to a dummy load, and can also be used to feed the first output port of the second power distributor 220 into the first second acceleration structure 230 through the second power synthesizer 250.

[0035] It should be noted that the number of the fourth power divider can be one, two, or three, and the number of the fourth power divider is not limited in this embodiment. The function of the fourth power divider is to redistribute the output pulse microwave power, and the input pulse microwave power can be divided into at least two paths. Preferably, the fourth power divider is used to divide the input pulse microwave power into two paths. It should be noted that the pulse microwave power input to the fourth power divider can be the output of the first power divider 120, or it can be the output of another fourth power divider.

[0036] In some embodiments, the linear accelerator based on the high-gradient traveling wave acceleration structure also includes at least one second linear acceleration module 200, the second linear acceleration module 200 includes a second power source system 210, a second power distributor 220 and a second acceleration structure 230; the input port of the second power distributor 220 is connected to the second power source system 210, and is used to output at least two pulsed microwave powers; the first output port of the second power distributor 220 and the output port of the second first acceleration structure 130 are both connected to the input port of the first second acceleration structure 230; the second output port of the second power distributor 220 and the output port of the first second acceleration structure 230 are both connected to the input port of the second second acceleration structure 230.

[0037] In this embodiment, by setting up the second linear acceleration module 200, and the first output port of the second power distributor 220 and the output port of the second first acceleration structure 130 are connected to the input port of the first second acceleration structure 230, it is possible to fully utilize the pulse microwave power provided by the first power source system 110, and avoid wasting the pulse microwave power output from the second first acceleration structure 130. By setting up the second power distributor 220, the pulse microwave power output by the second power source system 210 can be divided into at least two paths, and the two paths of pulse microwave power are respectively fed into the two second acceleration structures 230. Obviously, compared with the traditional linear accelerator, this embodiment can make the number of second power source systems 210 less than the number of second acceleration structures 230, thereby reducing the cost of the entire linear accelerator, and solving the defect of high power source cost of the linear accelerator based on the traveling wave acceleration structure in the prior art.

[0038] It can be understood that the second accelerating structure 230 is a high-gradient traveling wave accelerating structure.

[0039] It is understandable that the second power divider 220 can be used to divide the pulse microwave power provided by the second power source system 210 into two parts, three parts, four parts or five parts, etc., and in this embodiment, there is no limit on the number of pulse microwave powers divided by the second power divider 220. Preferably, the second power divider 220 can be used to divide the pulse microwave power provided by the second power source system 210 into two parts.

[0040] It should be noted that each portion of the pulse microwave power output from the second power distributor 220 can be fed into the corresponding second accelerating structure 230 .

[0041] Furthermore, the second linear acceleration module 200 also includes at least one third power distributor 240 and at least three second acceleration structures 230; the input port of the third power distributor 240 is connected to the second output port of the second power distributor 220; the first output port of the third power distributor 240 and the output port of the first second acceleration structure 230 are both connected to the input port of the second second acceleration structure 230; the second output port of the third power distributor 240 and the output port of the second second acceleration structure 230 are both connected to the input port of the third second acceleration structure 230.

[0042] In this embodiment, the third power distributor 240 can be provided to realize the redistribution of the pulse microwave power output from the second output port of the second power distributor 220, thereby increasing the number of second acceleration structures 230 without increasing the number of second power source systems 210, thereby reducing the cost of the linear accelerator.

[0043] It should be noted that the number of the third power divider 240 can be one, two, or three, and in this embodiment, the number of the third power divider 240 is not limited. The function of the third power divider 240 is to redistribute the output pulse microwave power, and the input pulse microwave power can be divided into at least two paths. Preferably, the third power divider 240 is used to divide the input pulse microwave power into two paths. It should be noted that the pulse microwave power input to the third power divider 240 can be the output of the second power divider 220, or it can be the output of another third power divider 240.

[0044] Furthermore, the linear accelerator with a high-gradient traveling wave acceleration structure includes at least two second linear acceleration modules 200; the output port of the third second acceleration structure 230 of one second linear acceleration module 200 is connected to the input port of the first second acceleration structure 230 of another second linear acceleration module 200. With such a design, the pulse microwave power of each second linear acceleration module 200 can be fully utilized, thereby improving the utilization efficiency of the microwave power.

[0045] It is understandable that when the second linear acceleration module 200 only includes two second acceleration structures 230 , the output port of the second second acceleration structure 230 of one second linear acceleration module 200 is connected to the input port of the first second acceleration structure 230 of another second linear acceleration module 200 .

[0046] Furthermore, the second linear acceleration module 200 also includes at least three second power synthesizers 250, at least three third phase shifters 260 and at least three fourth phase shifters 270; the second power synthesizers 250 correspond one-to-one to the second acceleration structures 230; the third phase shifters 260 correspond one-to-one to the second power synthesizers 250; the third phase shifters 260 are arranged at the input port of the corresponding second power synthesizer 250; the fourth phase shifters 270 correspond one-to-one to the second power synthesizer 250; and the fourth phase shifters 270 are arranged at the output port of the corresponding second power synthesizer 250.

[0047] Specifically, the first output port of the second power distributor 220 is connected to the input port of the first second power synthesizer 250 through the first third phase shifter 260, the output port of the second first acceleration structure 130 is also connected to the input port of the first second power synthesizer 250, and the output port of the first second power synthesizer 250 is fed into the input port of the first second acceleration structure 230 through the first fourth phase shifter 270. The first output port of the third power distributor 240 is connected to the input port of the second second power synthesizer 250 through the second third phase shifter 260, the output port of the first second acceleration structure 230 is connected to the input port of the second second power synthesizer 250, and the output port of the second second power synthesizer 250 is fed into the input port of the second second acceleration structure 230 through the second fourth phase shifter 270. The second output port of the third power distributor 240 is connected to the input port of the third second power synthesizer 250 through the third third phase shifter 260, the output port of the second second acceleration structure 230 is connected to the input port of the third second power synthesizer 250, and the output port of the third second power synthesizer 250 is fed into the input port of the third second acceleration structure 230 through the third fourth phase shifter 270.

[0048] The third phase shifter 260 is used to adjust the phase of the pulse microwave power output from the power divider so that the phases of the two pulse microwave powers input into the second power combiner 250 are the same; the second power combiner 250 is used to combine the two pulse microwave powers with the same phase. The fourth phase shifter 270 is used to synchronize the phase of the pulse microwave power fed into the second accelerating structure 230 with the accelerated particles.

[0049] Furthermore, the second power source system 210 may have the same structure as the first power source system 110. Specifically, the second power source system 210 also includes a second power source 211 and a second klystron 212; the output end of the second power source 211 is connected to the input port of the second power distributor 220 through the second klystron 212; the input port of the second power source 211 is used to connect to the signal generator 300.

[0050] Furthermore, the second accelerating structure 230 may have the same structure as the first accelerating structure 130. Preferably, the second accelerating structure 230 may be a high-gradient traveling wave accelerating structure.

[0051] Specifically, an input port of the second accelerating structure 230 is provided with an input coupler, and an output port of the second accelerating structure 230 is provided with an output coupler.

[0052] Specifically, the output end of the fourth phase shifter 270 is connected to the input port of the second acceleration structure 230 through an input coupler, and the output port of the second acceleration structure 230 is connected to the second power combiner 250 through an output coupler.

[0053] In summary, the linear accelerator provided in this embodiment can fully utilize the output microwave power of the high-gradient traveling wave acceleration structure, utilize mature microwave components such as power dividers, phase shifters, and power synthesizers, improve the efficiency of microwave power utilization, and reduce the number of klystrons and power sources, thereby reducing the cost of the entire linear accelerator, facilitating popularization, and expanding the application scope of the linear accelerator.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A linear accelerator based on a high-gradient traveling wave acceleration structure, characterized in that: It comprises a first linear acceleration module (100); the first linear acceleration module (100) comprises: A first power source system (110) for providing pulsed microwave power; A first power distributor (120), wherein an input port of the first power distributor (120) is connected to the first power source system (110) and is used to output at least two pulse microwave powers; Two first acceleration structures (130), wherein a first output port of the first power distributor (120) is connected to an input port of a first first acceleration structure (130) for feeding a pulsed microwave power into the first first acceleration structure (130); and a second output port of the first power distributor (120) is connected to an input port of a second first acceleration structure (130) for feeding another pulsed microwave power into the second first acceleration structure (130); The output port of a first one of the first acceleration structures (130) is connected to the input port of a second one of the first acceleration structures (130).

2. The linear accelerator based on the high gradient traveling wave acceleration structure according to claim 1, characterized in that: The first linear acceleration module (100) further comprises: A first phase shifter (140) and a second phase shifter (150); A first power combiner (160), the first phase shifter (140) is arranged at the input port of the first power combiner (160), and the second phase shifter (150) is arranged at the output port of the first power combiner (160); the second output port of the first power distributor (120) and the output port of the first first acceleration structure (130) are connected to the input port of the second first acceleration structure (130) through the first power combiner (160).

3. The linear accelerator based on the high gradient traveling wave acceleration structure according to claim 1, characterized in that: It also includes at least one second linear acceleration module (200), wherein the second linear acceleration module (200) includes: A second power source system (210) for providing pulsed microwave power; A second power distributor (220), the input port of the second power distributor (220) being connected to the second power source system (210) and being used for outputting at least two pulse microwave powers; Two second acceleration structures (230), the first output port of the second power distributor (220) and the output port of the second first acceleration structure (130) are both connected to the input port of the first second acceleration structure (230); the second output port of the second power distributor (220) and the output port of the first second acceleration structure (230) are both connected to the input port of the second second acceleration structure (230).

4. The linear accelerator based on the high gradient traveling wave acceleration structure according to claim 3, characterized in that: The second linear acceleration module (200) further comprises: at least one third power distributor (240), the input port of the third power distributor (240) being connected to the second output port of the second power distributor (220); At least three second accelerating structures (230), the first output port of the third power distributor (240) and the output port of the first second accelerating structure (230) are both connected to the input port of the second second accelerating structure (230); the second output port of the third power distributor (240) and the output port of the second second accelerating structure (230) are both connected to the input port of the third second accelerating structure (230).

5. The linear accelerator based on the high gradient traveling wave acceleration structure according to claim 4, characterized in that: It comprises at least two second linear acceleration modules (200); the output port of the third second acceleration structure (230) of one of the second linear acceleration modules (200) is connected to the input port of the first second acceleration structure (230) of another second linear acceleration module (200).

6. The linear accelerator based on the high gradient traveling wave acceleration structure according to claim 4, characterized in that: The second linear acceleration module (200) further comprises: At least three second power combiners (250), corresponding one to one to the second accelerating structures (230); At least three third phase shifters (260), corresponding one to one with the second power synthesizer (250); the third phase shifters (260) are arranged at the input ports of the corresponding second power synthesizers (250); At least three fourth phase shifters (270) correspond one to one with the second power combiner (250); the fourth phase shifters (270) are arranged at the output ports of the corresponding second power combiners (250).

7. The linear accelerator based on the high gradient traveling wave acceleration structure according to claim 1, characterized in that: The first linear acceleration module (100) further comprises: at least one fourth power distributor, the input port of the fourth power distributor being connected to the second output port of the first power distributor (120); At least three of the first accelerating structures (130), the first output port of the fourth power distributor and the output port of the first first accelerating structure (130) are both connected to the input port of the second first accelerating structure (130), and the second output port of the fourth power distributor is connected to the output port of the third first accelerating structure (130).

8. The linear accelerator based on a high gradient traveling wave acceleration structure according to any one of claims 1 to 7, characterized in that: The input port of the first acceleration structure (130) is provided with an input coupler, and the output port of the first acceleration structure (130) is provided with an output coupler.

9. The linear accelerator based on the high gradient traveling wave acceleration structure according to claim 8, characterized in that: The first power source system (110) comprises a first power source (111) and a first klystron (112); the output end of the first power source (111) is connected to the input port of the first power distributor (120) via the first klystron (112).

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