A linear accelerator based on a high-gradient traveling-wave acceleration structure

Abstract

The present 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 includes a first power source system, a first power distributor, and two first acceleration structures. The first power source system is used to provide pulsed microwave power; the input port of the first power distributor is connected to the first power source system and is used to output at least two paths of pulsed microwave power; the first output port of the first power distributor is connected to the input port of the first first acceleration structure and is used to feed one path of 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 and is used to feed another path of pulsed microwave power into the second first acceleration structure. In the present invention, by providing the first power distributor, the number of the first power source systems can be reduced, and the defect of high power source cost of the linear accelerator based on the traveling-wave acceleration structure in the prior art is solved.

Description

Technical Field

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

[0002] High-gradient acceleration structures can greatly shorten the length of linear accelerators, thereby reducing the cost of the entire linear accelerator. They are one of the advanced technologies in the field of accelerator technology internationally. High-gradient acceleration structures are generally divided into standing wave structures and traveling wave structures.

[0003] Standing wave structures require lower microwave power input, but have a longer filling time and generally require longer microwave pulses. Due to the microwave thermal effect, their application with high repetition frequencies is limited. Traveling wave structures are equivalent to waveguide devices, so their filling time is shorter. Since the microwave power fed in, except for the power of the built-in field in the cavity, is usually absorbed by the dummy load through the output coupler, the peak power fed in is usually high. Because traveling wave structures can operate at shorter pulse lengths, they can meet the requirements of high repetition frequencies. For traveling wave acceleration structures, the peak power of the required microwave power source is usually high. Part of it is used for cavity losses, and the remaining power is absorbed by the dummy load, resulting in waste of microwave power. Moreover, for the entire accelerator power source system, the power source cost of using traveling wave acceleration structures is generally high.

[0004] Therefore, how to reduce the power source cost of linear accelerators based on traveling wave acceleration structures is an urgent problem to be solved in the industry. Summary of the Invention

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

[0006] The present invention provides a linear accelerator based on a high-gradient traveling wave acceleration structure, including a first linear acceleration module; the first linear acceleration module includes:

[0007] A first power source system for providing pulsed microwave power;

[0008] A first power distributor, the input port of the first power distributor is connected to the first power source system, and is used for outputting at least two paths of pulsed microwave power;

[0009] Two first acceleration structures, the first output port of the first power distributor is connected to the input port of the first of the first acceleration structures for feeding one path of the pulsed microwave power into the first of the first acceleration structures; the second output port of the first power distributor is connected to the input port of the second of the first acceleration structures for feeding the other path of the pulsed microwave power into the second of the first acceleration structures.

[0010] According to the linear accelerator based on a high-gradient traveling-wave acceleration structure provided by the present invention, the output port of the first one of the first acceleration structures is connected to the input port of the second one of the first acceleration structures.

[0011] According to the linear accelerator based on a high-gradient traveling-wave acceleration structure provided by the present invention, the first linear acceleration module further includes:

[0012] A first phase shifter and a second phase shifter;

[0013] A first power combiner, the first phase shifter is disposed at the input port of the first power combiner, and the second phase shifter is disposed 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 one of the first acceleration structures are connected to the input port of the second one of the first acceleration structures through the first power combiner.

[0014] According to the linear accelerator based on a high-gradient traveling-wave acceleration structure provided by the present invention, it further includes at least one second linear acceleration module, and the second linear acceleration module includes:

[0015] A second power source system for providing pulsed microwave power;

[0016] A second power distributor, the input port of the second power distributor is connected to the second power source system for outputting at least two paths of pulsed microwave power;

[0017] Two second acceleration structures, the first output port of the second power distributor and the output port of the second one of the first acceleration structures are both connected to the input port of the first one of the second acceleration structures; the second output port of the second power distributor and the output port of the first one of the second acceleration structures are both connected to the input port of the second one of the second acceleration structures.

[0018] According to the linear accelerator based on a high-gradient traveling-wave acceleration structure provided by the present invention, the second linear acceleration module further includes:

[0019] At least one third power distributor, the input port of the third power distributor is connected to the second output port of the second power distributor;

[0020] At least three of the second acceleration structures, the first output port of the third power distributor and the output port of the first one of the second acceleration structures are both connected to the input port of the second one of the second acceleration structures; the second output port of the third power distributor and the output port of the second one of the second acceleration structures are both connected to the input port of the third one of the second acceleration structures.

[0021] The linear accelerator based on a high-gradient traveling-wave acceleration structure provided by the present invention includes at least two of the 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.

[0022] For the linear accelerator based on a high-gradient traveling-wave acceleration structure provided by the present invention, the second linear acceleration module further includes:

[0023] At least three second power combiners, corresponding to the second acceleration structures one by one;

[0024] At least three third phase shifters, corresponding to the second power combiners one by one; the third phase shifters are provided at the input ports of the corresponding second power combiners;

[0025] At least three fourth phase shifters, corresponding to the second power combiners one by one; the fourth phase shifters are provided at the output ports of the corresponding second power combiners.

[0026] For the linear accelerator based on a high-gradient traveling-wave acceleration structure provided by the present invention, the first linear acceleration module further includes:

[0027] At least one fourth power distributor, the input port of which is connected to the second output port of the first power distributor;

[0028] At least three of the first acceleration structures, the first output port of the fourth power distributor and the output port of the first first acceleration structure are both connected to the input port of the second first acceleration structure, and the second output port of the fourth power distributor is connected to the output port of the third first acceleration structure.

[0029] For the linear accelerator based on a high-gradient traveling-wave acceleration structure provided by the present invention, an input coupler is provided at the input port of the first acceleration structure, and an output coupler is provided at the output port of the first acceleration structure.

[0030] For the linear accelerator based on a 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.

[0031] The linear accelerator based on a 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 through the setting of the first power distributor, and these two paths of pulsed microwave power are respectively fed into two first acceleration structures. Obviously, compared with the traditional linear accelerator based on a traveling-wave acceleration structure, the linear accelerator based on a high-gradient traveling-wave acceleration structure of the present invention can reduce the number of the first power source systems to be less than the number of the first acceleration structures, thereby reducing the cost of the entire linear accelerator and solving the defect of the high power source cost of the linear accelerator based on a traveling-wave acceleration structure in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 FIG. is a schematic structural diagram of a linear accelerator based on a high-gradient traveling-wave acceleration structure provided by the present invention.

[0034] Reference Signs:

[0035] 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;

[0036] 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;

[0037] 300, signal generator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] In order to make the objects, technical solutions, and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present invention belong to the scope of protection of the present invention.

[0039] Existing linear accelerators based on high-gradient traveling-wave acceleration structures include multiple sets of power sources and multiple sets of high-gradient traveling-wave acceleration structures; the power sources and the high-gradient traveling-wave acceleration structures are in one-to-one correspondence. In other words, one set of power source corresponds to one set of high-gradient traveling-wave acceleration structure; specifically, the power source is connected to the corresponding high-gradient traveling-wave acceleration structure through a klystron, and is used to feed microwave power into the high-gradient traveling-wave acceleration structure. The large number of power sources and klystrons required by this kind of linear accelerator makes the cost of the entire linear accelerator high. In addition, a 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 outside the cavity through the output coupler and absorbed by the dummy load, resulting in waste of microwave power. Because the peak input power of the high-gradient traveling-wave acceleration structure is relatively high, on the one hand, the price of the entire set of power sources is expensive, and on the other hand, usually 50% of the microwave power is absorbed by the dummy load, resulting in large losses, which makes the price of the power source system of the entire accelerator relatively high.

[0040] To solve at least one aspect 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 the high-gradient traveling-wave acceleration structure includes a first linear acceleration module 100, and the first linear acceleration module 100 includes a first power source system 110, a first power distributor 120, and two first acceleration structures 130.

[0041] 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 paths of pulsed microwave power; 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 path of 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 the other path of pulsed microwave power into the second first acceleration structure 130.

[0042] In this embodiment, by setting the first power distributor 120, the pulsed microwave power output by the first power source system 110 can be divided into at least two paths, and these two paths of pulsed microwave power are respectively fed into the two first acceleration structures 130. Obviously, compared with the traditional linear accelerator, the linear accelerator of this embodiment can make the number of the first power source systems 110 less than the number of the first acceleration structures 130, thereby reducing the cost of the entire linear accelerator and solving the defect that the power source cost of the linear accelerator based on the traveling-wave acceleration structure in the prior art is relatively high.

[0043] It can be understood that the first acceleration structure 130 in this embodiment can be a high-gradient traveling-wave acceleration structure.

[0044] It can be understood that the first power splitter 120 can be used to divide the pulsed microwave power provided by the first power source system 110 into two parts, three parts, four parts, five parts, etc. In this embodiment, the number of pulsed microwave power divided by the first power splitter 120 is not limited. Preferably, the first power splitter 120 can be used to divide the pulsed microwave power provided by the first power source system 110 into two parts.

[0045] It should be noted that each part of the pulsed microwave power output from the first power splitter 120 can be fed into the corresponding first acceleration structure 130.

[0046] Furthermore, the output port of the first first acceleration structure 130 is connected to the input port of the second first acceleration structure 130. With such a design, the pulsed microwave power that is not used to establish the required electric field in the first acceleration structure 130 can be fed into the second first acceleration structure 130 for secondary utilization, avoiding waste of microwave power. At the same time, it can also reduce the price of a single first power source system 110, thereby reducing the cost of the entire linear accelerator.

[0047] Furthermore, the first linear acceleration module 100 further includes a first phase shifter 140, a second phase shifter 150, and 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 splitter 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. Specifically, the first power splitter 120 outputs two paths of pulsed microwave power. One path of pulsed microwave power is directly fed into the first first acceleration structure 130, and the other path is phase-shifted by the first phase shifter 140 and then fed into the second first acceleration structure 130 through the first power combiner 160 and the second phase shifter 150 in sequence with the output port of the first first acceleration structure 130. With such a design, it can not only achieve full utilization of the pulsed microwave power, improve the utilization efficiency of the microwave power, reduce the number of first power source systems 110, and reduce the cost of the linear accelerator; but also ensure that the phase of the microwave power entering the second first acceleration structure 130 is synchronized with the accelerating particles.

[0048] Furthermore, an input coupler is provided at the input port of the first acceleration structure 130, and an output coupler is provided at the output port of the first acceleration structure 130. Specifically, the first output port of the first power divider 120 is connected to the input port of the first first acceleration structure 130 through the input coupler, and the output port of the first first acceleration structure 130 is connected to the second output port of the first power divider 120 through the output coupler and then fed into the cavity of the second first acceleration structure 130 through the input coupler of the second first acceleration structure 130 after passing through the first power combiner 160.

[0049] Furthermore, 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 divider 120 through the first klystron 112. Specifically, the input port of the first power source 111 is used to be connected 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 divider 120 through the first klystron 112, so as to achieve the purpose of providing pulsed microwave power to the first power divider 120. In this embodiment, through the setting of the first power divider 120, the pulsed microwave power can be provided to the new first acceleration structure 130, thereby making full use of the microwave power, reducing the number of klystrons, and lowering the cost.

[0050] Furthermore, the first linear acceleration module 100 further includes at least one fourth power divider and at least three first acceleration structures 130; the input port of the fourth power divider is connected to the second output port of the first power divider 120; the first output port of the fourth power divider 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 divider is connected to the output port of the third first acceleration structure 130.

[0051] In this embodiment, the redistribution of a path of pulsed microwave power output from the second output port of the first power divider 120 can be realized by setting the fourth power divider, so as to increase the number of the first acceleration structures 130 without increasing the number of the first power source systems 110, and further reduce the cost of the linear accelerator.

[0052] Specifically, the first output port of the first power divider 120 is connected to the input port of the first first acceleration structure 130, and the second output port of the first power divider 120 is connected to the input port of the fourth power divider; the first output port of the fourth power divider 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 combiner 160; the second output port of the fourth power divider 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 combiner 160; the output port of the third first acceleration structure 130 can be used to connect to a dummy load or can be used to feed the first output port of the second power divider 220 into the first second acceleration structure 230 through the second power combiner 250.

[0053] It should be noted that the number of fourth power dividers can be one, two, or three, and the number of fourth power dividers is not limited in this embodiment. The function of the fourth power divider is to redistribute the output pulsed microwave power and can divide the input pulsed microwave power into at least two paths. Preferably, the fourth power divider is used to divide the input pulsed microwave power into two paths. It should be noted that the pulsed microwave power input to the fourth power divider can be output by the first power divider 120 or can be output by another fourth power divider.

[0054] In some embodiments, the linear accelerator based on the high-gradient traveling wave acceleration structure further 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 divider 220, and a second acceleration structure 230; the input port of the second power divider 220 is connected to the second power source system 210 and is used to output at least two paths of pulsed microwave power; the first output port of the second power divider 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 divider 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.

[0055] In this embodiment, by providing the second linear acceleration module 200, and connecting the first output port of the second power divider 220 and the output port of the second first acceleration structure 130 to the input port of the first second acceleration structure 230, it is possible to make full use of the pulsed microwave power provided by the first power source system 110 and avoid wasting the pulsed microwave power output from the second first acceleration structure 130. By providing the second power divider 220, the pulsed microwave power output from the second power source system 210 can be divided into at least two paths, and these two paths of pulsed microwave power are respectively fed into two second acceleration structures 230. Obviously, compared with traditional linear accelerators, in this embodiment, the number of second power source systems 210 can be less than the number of second acceleration structures 230, thereby reducing the cost of the entire linear accelerator and solving the defect of the high power source cost of the linear accelerator based on the traveling wave acceleration structure in the prior art.

[0056] It can be understood that the second acceleration structure 230 is a high-gradient traveling wave acceleration structure.

[0057] It can be understood that the second power divider 220 can be used to divide the pulsed microwave power provided by the second power source system 210 into two parts, three parts, four parts, five parts, etc. In this embodiment, there is no limitation on the number of pulsed microwave power divided by the second power divider 220. Preferably, the second power divider 220 can be used to divide the pulsed microwave power provided by the second power source system 210 into two parts.

[0058] It should be noted that each part of the pulsed microwave power output from the second power divider 220 can be fed into the corresponding second acceleration structure 230.

[0059] Furthermore, the second linear acceleration module 200 further includes at least one third power divider 240 and at least three second acceleration structures 230; the input port of the third power divider 240 is connected to the second output port of the second power divider 220; the first output port of the third power divider 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 divider 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.

[0060] In this embodiment, by providing the third power divider 240, it is possible to redistribute the pulsed microwave power of one path output from the second output port of the second power divider 220, so as to increase the number of second acceleration structures 230 without increasing the number of second power source systems 210 and reduce the cost of the linear accelerator.

[0061] It should be noted that the number of the third power dividers 240 can be one, two, or three, and the number of the third power dividers 240 is not limited in this embodiment. The function of the third power divider 240 is to redistribute the output pulsed microwave power, and the input pulsed microwave power can be divided into at least two paths. Preferably, the third power divider 240 is used to divide the input pulsed microwave power into two paths. It should be noted that the pulsed microwave power input to the third power divider 240 can be output by the second power divider 220 or another third power divider 240.

[0062] 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. Designed in this way, the full utilization of the pulsed microwave power of each second linear acceleration module 200 can be realized, and the utilization efficiency of the microwave power can be improved.

[0063] It can be understood 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.

[0064] Furthermore, the second linear acceleration module 200 further includes at least three second power combiners 250, at least three third phase shifters 260, and at least three fourth phase shifters 270; the second power combiners 250 correspond to the second acceleration structures 230 one by one; the third phase shifters 260 correspond to the second power combiners 250 one by one; the third phase shifters 260 are arranged at the input ports of the corresponding second power combiners 250; the fourth phase shifters 270 correspond to the second power combiners 250 one by one; the fourth phase shifters 270 are arranged at the output ports of the corresponding second power combiners 250.

[0065] Specifically, the first output port of the second power divider 220 is connected to the input port of the first second power combiner 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 combiner 250. The output port of the first second power combiner 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 divider 240 is connected to the input port of the second second power combiner 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 combiner 250. The output port of the second second power combiner 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 divider 240 is connected to the input port of the third second power combiner 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 combiner 250. The output port of the third second power combiner 250 is fed into the input port of the third second acceleration structure 230 through the third fourth phase shifter 270.

[0066] The third phase shifter 260 is used to adjust the phase of the pulsed microwave power output from the power divider so that the phases of the two paths of pulsed microwave power input into the second power combiner 250 are the same. The second power combiner 250 is used to combine two pulsed microwave powers with the same phase. The fourth phase shifter 270 is used to synchronize the phase of the pulsed microwave power fed into the second acceleration structure 230 with the accelerated particles.

[0067] Furthermore, the structure of the second power source system 210 can be the same as that of 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 divider 220 through the second klystron 212. The input port of the second power source 211 is used to connect to the signal generator 300.

[0068] Furthermore, the structure of the second acceleration structure 230 can be the same as that of the first acceleration structure 130. Preferably, the second acceleration structure 230 can be a high-gradient traveling wave acceleration structure.

[0069] Specifically, an input coupler is provided at the input port of the second acceleration structure 230, and an output coupler is provided at the output port of the second acceleration structure 230.

[0070] Specifically, the output end of the fourth phase shifter 270 is connected to the input port of the second acceleration structure 230 through the input coupler, and the output port of the second acceleration structure 230 is connected to the second power combiner 250 through the output coupler.

[0071] In summary, the linear accelerator provided in this embodiment can make full use of the output microwave power of the high-gradient traveling-wave acceleration structure. By using mature microwave components such as power dividers, phase shifters, and power combiners, it can improve the utilization efficiency of microwave power, 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.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. And these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate 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 includes a first linear acceleration module (100); the first linear acceleration module (100) includes: A first power source system (110) for providing pulsed microwave power; A first power distributor (120), the input port of the first power distributor (120) is connected to the first power source system (110) and is used for outputting two paths of pulsed microwave power; Two first acceleration structures (130), the first output port of the first power distributor (120) is connected to the input port of the first of the first acceleration structures (130) for feeding one path of pulsed microwave power into the first of the first acceleration structures (130); the second output port of the first power distributor (120) is connected to the input port of the second of the first acceleration structures (130) for feeding the other path of pulsed microwave power into the second of the first acceleration structures (130); The output port of the first of the first acceleration structures (130) is connected to the input port of the second of the first acceleration structures (130); It further includes at least one second linear acceleration module (200), and 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) is connected to the second power source system (210) and is used for outputting two paths of pulsed microwave power; A third power distributor (240), the input port of the third power distributor (240) is connected to the second output port of the second power distributor (220); Three second acceleration structures (230), the first output port of the second power distributor (220) and the output port of the second of the first acceleration structures (130) are both connected to the input port of the first of the second acceleration structures (230); the first output port of the third power distributor (240) and the output port of the first of the second acceleration structures (230) are both connected to the input port of the second of the second acceleration structures (230); the second output port of the third power distributor (240) and the output port of the second of the second acceleration structures (230) are both connected to the input port of the third of the second acceleration structures (230).

2. The linear accelerator based on a high-gradient traveling-wave acceleration structure according to claim 1, characterized in that, The first linear acceleration module (100) further includes: 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 of the first acceleration structures (130) are connected to the input port of the second of the first acceleration structures (130) through the first power combiner (160).

3. The linear accelerator based on a high-gradient traveling-wave acceleration structure according to claim 1, wherein including at least two of the second linear acceleration modules (200); an output port of a third second acceleration structure (230) of one of the second linear acceleration modules (200) is connected to an input port of a first second acceleration structure (230) of another second linear acceleration module (200).

4. The linear accelerator based on a high-gradient traveling-wave acceleration structure according to claim 1, characterized in that, The second linear acceleration module (200) further includes: three second power combiners (250), corresponding to the second acceleration structures (230) one by one; three third phase shifters (260), corresponding to the second power combiners (250) one by one; the third phase shifters (260) are disposed at input ports of the corresponding second power combiners (250); three fourth phase shifters (270), corresponding to the second power combiners (250) one by one; the fourth phase shifters (270) are disposed at output ports of the corresponding second power combiners (250).

5. The linear accelerator based on a high-gradient traveling-wave acceleration structure according to any one of claims 1 to 4, characterized in that An input coupler is disposed at an input port of the first acceleration structure (130), and an output coupler is disposed at an output port of the first acceleration structure (130).

6. The linear accelerator based on a high-gradient traveling-wave acceleration structure according to claim 5, characterized in that, The first power source system (110) includes a first power source (111) and a first klystron (112); an output end of the first power source (111) is connected to an input port of the first power divider (120) through the first klystron (112).

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