Accelerating device
By introducing asymmetric edge cavity nose cones and energy switch probes into the acceleration device, the adjustment of the electric field distribution is achieved, which solves the problem that traditional acceleration devices cannot provide different energy particle beams, and improves the acceleration efficiency and controllability of the treatment process.
Patent Information
- Application Number
- CN202311869082.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-07-01
AI Technical Summary
Traditional acceleration devices cannot provide particle beams and imaging beams of different energies, and the existing control methods have problems such as high processing difficulty and high accuracy requirements.
An acceleration device is designed, including an acceleration lumen chain and an energy switch side cavity. By setting asymmetric edge cavity nose cone and energy switch probe in the energy switch side cavity, the adjustment of electric field distribution and precise control of particle trajectory is achieved.
It improves acceleration efficiency and controllability of the treatment process, and can output particle beams and imaging beams of different energies to meet different experimental needs.
Smart Images
Figure CN120239165A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of particle acceleration technology, and particularly to an acceleration device. Background Art
[0002] With the development of particle acceleration technology, various accelerators have emerged. For example, medical accelerators are particle accelerator devices used in biomedical fields for radiotherapy of tumors. A charged particle accelerator is an electromagnetic device that uses artificial methods to accelerate various types of charged particles to higher energies with the help of different forms of electric fields. To enable charged particles to obtain energy, an accelerating electric field is required. According to the different types of accelerated particles, different forms of accelerating electric fields, and different orbits followed during the particle acceleration process, accelerators are divided into various types.
[0003] In traditional technologies, accelerators that can output multi - energy - level electron beams mainly fall into three categories. One category is to control the angle / position of the moving flat plate in the side cavity to control the electric field strength downstream of the accelerating tube cavity chain. Another category is to control the insertion depth of the probe in the side cavity to change the electric field amplitude of the downstream cavity. The third category is to make the downstream electric field phase reverse to a decelerating field by moving the phase switch. However, the phase - shifting flat plate requires high - precision motion control and has high requirements for processing and manufacturing technology. Common probe - type energy switches are more applied to output therapeutic beams and are insufficient for lower - energy imaging beam currents. Moreover, the method of changing the number of side cavities has fewer energy levels. Therefore, traditional acceleration devices cannot provide particle beams and imaging beams with different energies. Summary of the Invention
[0004] Based on this, it is necessary to provide an acceleration device that can provide particle beams and imaging beams with different energies in view of the above - mentioned technical problems.
[0005] In a first aspect, this application provides an acceleration device. The acceleration device includes an accelerating tube cavity chain and at least one energy - switch side cavity; wherein,
[0006] The energy - switch side cavity is connected to two adjacent main cavities in the accelerating tube cavity chain through coupling holes; a pair of side - cavity nose cones with asymmetric dimensions is arranged in the energy - switch side cavity.
[0007] An energy - switch probe is arranged at the top of the energy - switch side cavity, and the energy - switch probe extends from the top of the energy - switch side cavity between the two side - cavity nose cones.
[0008] In one embodiment, the overall shape of the energy - switch side cavity is a semi - cylindrical shape, the rectangular plane of the semi - cylindrical shape is close to the main cavity and serves as the bottom surface of the side cavity of the energy - switch side cavity; the coupling holes are opened on the bottom surface of the side cavity of the energy - switch side cavity.
[0009] In one embodiment, the energy switch probe can extend into and contact the bottom surface of the side cavity of the energy switch.
[0010] In one embodiment, the penetration depth of the energy switch probe in the side cavity of the energy switch can be controlled to adjust the ratio of the electric field strengths of two adjacent main cavities.
[0011] In one embodiment, it further includes a measurement unit for measuring the penetration depth of the energy switch probe in the side cavity of the energy switch.
[0012] In one embodiment, the acceleration device further includes a power source for providing energy to the acceleration device.
[0013] In one embodiment, the size of the coupling hole in the side cavity of the energy switch near the bunching section is larger than that of the coupling hole far from the bunching section.
[0014] In one embodiment, the distance between the two side cavity nose cones is greater than the diameter of the energy switch probe.
[0015] In one embodiment, the side cavity of the energy switch is located in the light speed section of the acceleration tube cavity chain.
[0016] In one embodiment, the working mode of the acceleration tube cavity chain is the π / 2 mode.
[0017] The above acceleration device includes an acceleration tube cavity chain and at least one side cavity of the energy switch. Among them, the side cavity of the energy switch is connected to two adjacent main cavities in the acceleration tube cavity chain through coupling holes. A pair of side cavity nose cones with asymmetric sizes are arranged in the side cavity of the energy switch. An energy switch probe is arranged at the top of the side cavity of the energy switch, and the energy switch probe extends from the top of the side cavity of the energy switch between the two side cavity nose cones.
[0018] What this application provides is actually in a certain side cavity of the energy switch. Through a special design (asymmetry) of the shape of the side cavity of the energy switch, and by introducing the energy switch, the electric field distribution in the acceleration tube cavity chain becomes adjustable. Then, together with the power source, the acceleration tube cavity chain can complete the output of beam currents at different energy levels. Most importantly, an energy switch is arranged at the top of the side cavity of the energy switch, and the probe of this switch precisely extends between the two side cavity nose cones, enabling the operator to finely adjust the acceleration process according to experimental requirements. This not only improves the acceleration efficiency but also makes the treatment process more controllable and allows for refined adjustment, providing an acceleration device for particle beams and imaging beams with different energies. Description of the Drawings
[0019] Figure 1 It is a schematic diagram of the overall structure of the acceleration device in one embodiment.
[0020] Figure 2 Schematic diagram of adjusting the position of the energy switch probe to change the field strength ratio in one embodiment;
[0021] Figure 3 Schematic diagram of the imaging mode in one embodiment;
[0022] Figure 4 Overall block diagram of the acceleration device in one embodiment. Detailed implementation manners
[0023] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.
[0024] Figure 1 Shows the overall structural schematic diagram of the acceleration device in the first embodiment of the present application. Among them, the acceleration device includes an acceleration tube cavity chain and at least one energy switch side cavity; wherein, the energy switch side cavity is connected to two adjacent main cavities in the acceleration tube cavity chain through coupling holes; a pair of side cavity nose cones with asymmetric sizes are arranged in the energy switch side cavity; an energy switch probe is arranged at the top of the energy switch side cavity, and the energy switch probe extends from the top of the energy switch side cavity between the two side cavity nose cones.
[0025] Specifically, when the acceleration device is started, first of all, the precise coupling mechanism between the acceleration cavity chain and the energy switch side cavity begins to function. This coupling ensures the smooth flow of particles during acceleration, minimizing energy loss and instability. Among them, the acceleration cavity chain has several side cavities, and the side cavity or cavities used to control the electron beam energy are one or more of these several side cavities, serving as the energy switch side cavity. In actual applications, some of the energy switch side cavity nose cones in the acceleration cavity chain are symmetric, and some of the energy switch side cavity nose cones in the bunching section are asymmetric, but there is no energy switch. In the present invention, the side cavity nose cone of the energy switch side cavity where the energy switch probe is located requires an asymmetric structure. The energy switch side cavity is connected to two adjacent main cavities through coupling holes, forming a seamlessly connected pipeline system that provides a stable channel for particles. Among them, the main cavity position, that is, the acceleration electric field amplitude along the central axis, can be intuitively adjusted by adjusting the size of the coupling holes on the cavity chain. Inside the energy switch side cavity, a pair of asymmetrically shaped side cavity nose cones are arranged. Their presence not only guides the particles to move along a specific path but also provides the possibility for subtle adjustment of the particle trajectory through the asymmetry in shape. The ingenuity of this design lies in that by fine-tuning the shape of the nose cone, the operator can achieve extremely precise control over the kinetic energy of the particles, thus meeting the requirements of different experimental or application scenarios.
[0026] A unique and crucial component, namely the energy switch, can be set at the top of the side cavity of the energy switch of the acceleration device. Among them, by changing the insertion depth of the energy switch probe in the side cavity of the energy switch, the energy switch can change the electric field amplitude ratio in the left and right energy switch side cavity chains of the side cavity of the energy switch. In practical applications, the capture rate of the acceleration tube cavity chain is also related to the injection voltage of the electron gun, which is used to adjust the energy switch. At the same time, only one energy switch is used at the position of one side cavity of the energy switch in the above process description. In practice, new side cavities of the energy switch with energy switches can be added at different positions to increase the adjustment ability. As a non-limiting example, in addition to the energy switch probe shown in the figure, a probe drive structure, bellows, etc. can also be included. This special energy switch has a probe that extends from the top to between the nose cones of the two side cavities, forming an exquisite control node. This energy switch is not only the core of the device but also the control center of the entire system. The role of the energy switch is very crucial. It directly affects the motion state of particles in the passing path by releasing precisely regulated energy. When the insertion depth of the energy switch probe into the asymmetric side cavity of the energy switch is different, it will change the electric field distribution of the acceleration tube cavity chain (main cavity). Combined with the change of the fed power, the acceleration tube cavity chain outputs particle beams with different energy levels. The operator can dynamically adjust the speed of the particles in real time to achieve precise control of the acceleration process. This design gives the operator great flexibility, enabling them to optimize and adjust the parameters of particle acceleration in real time according to specific experimental requirements or research goals.
[0027] When the high-energy gear is selected in the acceleration device, that is, when the energy switch probe is not inserted, the electric field amplitudes of each cavity on the central axis of the acceleration tube cavity chain are as Figure 2 shown in the subfigure above (achieved by controlling the size of the coupling holes of each side cavity of the energy switch. At this time, the energy switch probe does not play a role). The electric field amplitude in the light speed section is higher than that in the bunching section. Therefore, this state is used for the supply of high-energy beams, and the power generated by the power source and fed into the acceleration tube cavity chain is higher at this time. It can be considered that the electric field in the bunching section at this time is the required electric field with a relatively high capture rate. And the electrons can be accelerated to the energy (high-energy gear) we need after being accelerated in the bunching section and the light speed section.
[0028] When the medium / low-energy gear is selected in the acceleration device and the energy switch probe is inserted to a certain depth, the electric field amplitude ratio of the whole tube is as Figure 2 shown in the subfigure below. At this time, the electric field amplitude ratio in the bunching section is stronger. At the same time, by reducing the input power, the actual value of the electric field amplitude of the whole tube is reduced, and finally the actual value of the electric field in the bunching section is the same as that in the above high-energy gear, that is, there is also a relatively high electron capture rate. And the actual value of the electric field amplitude in the light speed section is lower than that in the high-energy gear at this time. Finally, an electron beam with the required energy is obtained.
[0029] In an application embodiment, such asFigure 2 As shown, Figure 1 the first four cavities are used as the bunching section. Its electric field amplitude is relatively important for the capture rate of the entire tube. For example, after optimization, 30% of the electrons can complete acceleration and be output. However, if there is no energy switch probe to adjust the electric field, the entire tube can only have a single energy, with a definite electric field distribution, a definite input energy, and the output electron beam energy is also single. After adding the energy switch probe, the ratio of the electric field amplitudes on both sides can be changed by the insertion depth of the energy switch probe. As Figure 2 shown in the upper sub-figure, it is the state when the energy switch is not inserted. Then, power A is fed into it to make the electric field amplitude of the bunching section reach the maximum capture rate, denoted as P, which is the output of one energy level.
[0030] As Figure 2 shown in the lower sub-figure, the probe is inserted a certain distance. The ratio of the electric field amplitude of its bunching section to that of the light speed section increases. If power A is fed into it at this time, the electric field amplitude of its bunching section is not in the state with the highest capture rate and may become P + X. Similarly, at this time, by controlling the magnitude of the fed-in power and reducing the fed-in power, for example, reducing the power to P - Y, the electric field amplitude of its bunching section is changed back to 1, the state with the highest capture rate. The capture rate of the accelerating tube is restored. However, the electric field amplitude of the entire tube (the light speed section part) is actually reduced, so the energy of the accelerated electrons will be lower than that in the previous case. This is considered another energy level. Therefore, by synchronously changing the insertion depth of the energy switch probe and the magnitude of the fed-in power in this way, the accelerating tube can output electron beams of different energy levels in a state with a relatively high capture rate.
[0031] In one embodiment, the capture rate of the accelerating tube is also related to the injection voltage of the electron gun, and this variable can be used as a supplement to the energy switch adjustment ability in actual use. Similarly, in practice, new energy switch side cavities with energy switch probes can be added at different positions to increase the adjustment ability.
[0032] In one embodiment, as Figure 3 shown, in the case of the imaging mode of the accelerating device, since the high-energy mode, medium-energy mode, and low-energy mode are all treatment beams, that is, the energy modes for generating X-rays through target hitting for treatment (there are also cases where electron beams are directly used for treatment). In the field of radiotherapy, in order to achieve better treatment effects, it is required that the accelerating tube can also output imaging beams with even lower energies (below 1 MV or even in the kV range). Therefore, in the mode of fully inserting the energy switch probe (imaging mode), in this mode, the energy switch probe reaches the bottom of the side cavity, short-circuits the side cavity, and makes the electric field strength in the subsequent main cavity 0, outputting the imaging beam.
[0033] As Figure 4As shown, it is the overall block diagram of the acceleration device. Among them, the energy switch driver receives a command to adjust the penetration degree of the probe in the energy switch, thereby changing the energy of the electron beam emitted by the electron gun in the acceleration tube. Among them, the modulator controls the magnitude of the energy provided by the power source to the acceleration device to adjust the magnitude of the fed power.
[0034] In this embodiment, what the present application provides is actually in a side cavity of an energy switch. Through a special design (asymmetry) of the shape of the side cavity of the energy switch, and by introducing the energy switch, the electric field distribution in the acceleration tube cavity chain becomes adjustable. Furthermore, acting together with the power source, the acceleration tube cavity chain can complete the output of beam currents of different energy levels. Most importantly, an energy switch is provided at the top of the side cavity of the energy switch, and the probe of this switch precisely extends between the nose cones of the two side cavities. This enables the operator to finely adjust the acceleration process according to experimental requirements. This not only improves the acceleration efficiency but also makes the treatment process more controllable and allows for refined adjustment, providing an acceleration device for particle beams and imaging beams of different energies.
[0035] In one embodiment, continue as Figure 1 shown in the overall structural schematic diagram of the acceleration device. Among them, the overall shape of the side cavity of the energy switch is a semi-cylindrical shape. The rectangular plane of the semi-cylindrical shape is close to the main cavity and serves as the bottom surface of the side cavity of the energy switch. The coupling holes are opened on the bottom surface of the side cavity of the energy switch.
[0036] Specifically, this rectangular plane of the semi-cylindrical shape is located on the side close to the main cavity and at the same time serves as the bottom surface of the side cavity of the energy switch. This design not only enables the side cavity of the energy switch to occupy a special position in the entire accelerator structure but also provides a more precise and stable platform for the acceleration of particle beams. In order to ensure the effective connection between the side cavity of the energy switch and the main cavity, coupling holes are provided on the bottom surface of the side cavity of the energy switch in the design. The existence of these coupling holes enables the main cavity and the side cavity of the energy switch to maintain a tight coupling, thereby ensuring that the acceleration device has a better capture rate and improving the energy control of the electron beam in the acceleration device.
[0037] In this embodiment, the overall shape of the side cavity of the energy switch is designed as a semi-cylindrical shape, with the rectangular plane close to the main cavity and serving as the bottom surface of the side cavity of the energy switch, effectively optimizing the transmission path of the particle beam. This shape not only helps to reduce the energy loss of the particles during transmission but also provides a more stable and controllable guiding platform. By opening the coupling holes on the bottom surface of the side cavity, the effective connection between the side cavity of the energy switch and the main cavity is achieved. Such a design ensures a tight coupling between the two chambers, thereby ensuring that the acceleration device has a better capture rate and improving the energy control of the electron beam in the acceleration device, which is further beneficial to improving the accuracy of particle therapy in medical applications.
[0038] In one embodiment, the energy switch probe can extend into and contact the bottom surface of the side cavity of the energy switch.
[0039] Specifically, this probe is designed to be flexible enough to extend into and contact the bottom surface of the side cavity of the energy switch. The key to this design lies in the ability to make direct contact with the bottom surface of the side cavity, achieving highly precise control of the energy switch. Its function is that the energy switch probe extends to the bottom of the side cavity, short - circuits the side cavity of the energy switch, makes the electric field in the subsequent cavity zero, enables the subsequent cavity not to accelerate the particles, further reduces the particle energy, and outputs an imaging beam with lower energy. In actual operation, when the energy switch is activated, its probe makes direct contact with the side cavity of the energy switch by extending into the bottom surface of the side cavity. This direct contact enables the energy switch to sense the energy of the particles inside the side cavity of the energy switch and make timely adjustments and controls as needed. Through the close connection with the bottom surface of the side cavity, the energy switch can achieve highly precise regulation of the energy inside the particle accelerator, thus enabling instant response and adjustment to the particle beam.
[0040] In this embodiment, real - time monitoring and sensing of the energy of the particles inside the side cavity of the energy switch are achieved, enabling the energy switch to instantly obtain information on the particle flow. This is crucial for ensuring the stability and precision during the particle acceleration process and helps improve the treatment effect of particle therapy in medical applications. Through the direct contact between the energy switch probe and the bottom surface of the side cavity, highly precise regulation of the energy inside the particle accelerator is achieved. This fine control can handle different treatment requirements and changes, enabling doctors to flexibly adjust the energy of the particle beam according to specific situations, thus better adapting to different types of tumors or lesions and improving the level of individualized treatment.
[0041] In one embodiment, the penetration depth of the energy switch probe in the side cavity of the energy switch can be controlled to adjust the electric field strength ratio between two adjacent main cavities.
[0042] Specifically, in the hardware design of the particle accelerator, the driving device of the energy switch plays a key role. The main function of this driving device is to control the penetration depth of the energy switch probe in the side cavity of the energy switch to adjust the electric field strength ratio between two adjacent main cavities. In actual operation, when the driving device is activated, it adjusts the electric field strength inside the side cavity of the energy switch by precisely controlling the penetration depth of the energy switch probe. This control process is adjusted according to specific treatment requirements and the properties of the particle beam to ensure a precise electric field strength ratio between two adjacent main cavities.
[0043] In this embodiment, by adjusting the penetration depth of the energy-switching probe in the side cavity of the energy switch, the electric field strength ratio between two adjacent main cavities can be adjusted. Doctors can flexibly adjust the electric field strength of the particle beam according to the specific conditions of the patient and the treatment plan, so as to optimize the treatment effect to the greatest extent. This precise electric field regulation helps to improve the performance of the accelerator, making particle therapy more accurate and personalized, and ultimately providing a more effective treatment plan for patients.
[0044] In one embodiment, the energy switch is provided with a measuring unit; further comprising a measuring unit for measuring the penetration depth of the energy-switching probe in the side cavity of the energy switch.
[0045] Specifically, the main function of the measuring unit is to measure the penetration depth of the energy-switching probe in the side cavity of the energy switch, so as to achieve high-precision monitoring and control of the probe position. During operation, the measuring unit uses an optical sensor or a similar measuring mechanism to record and feedback the position information of the probe in real time. This measurement can very accurately determine the penetration depth of the probe in the side cavity of the energy switch, providing real-time data feedback for doctors. This real-time monitoring information can be used to adjust the driving device to ensure precise control of the energy-switching probe, and then adjust the electric field strength of the side cavity of the energy switch.
[0046] In this embodiment, through the application of the measuring unit, the medical particle accelerator can more accurately sense and adjust the position of the probe during operation, so as to achieve more precise control of the particle beam. This helps to improve the stability and performance of the accelerator, providing a higher level of precision and safety for particle therapy in the medical field.
[0047] In one embodiment, the acceleration device further includes a power source; the power source is used to provide energy for the acceleration device.
[0048] Specifically, the hardware design of the medical particle accelerator not only includes an energy switch and a measuring unit, but also is equipped with a key component - a power source. Among them, the main function of the power source is to provide energy for the acceleration tube cavity chain, and the feeding power can be adjusted. It is connected to the acceleration tube cavity chain through a waveguide. Commonly used ones are magnetrons and klystrons, which can control the frequency and power of the output electromagnetic wave within a certain range (through a modulator). The main function of the power source is to change and control the magnitude of the microwave power fed into the linear acceleration tube cavity chain, so as to realize the regulation of the particle acceleration process. During actual operation, the power source directly affects the particle acceleration process in the linear acceleration tube cavity chain by adjusting the magnitude of the microwave power. By increasing or decreasing the microwave power, doctors can precisely adjust the energy level of the particle beam. This adjustment process is very flexible and can be fine-tuned according to the specific condition and treatment plan of the patient.
[0049] In this embodiment, the presence of the power source enables the medical particle accelerator to adapt to different types of tumors or lesions, providing more flexible and precise treatment options. This regulation of microwave power can achieve an immediate response to the particle beam, ensuring stability and precision during the treatment process. Generally speaking, the application of the power source in this hardware solution enhances the function of the medical particle accelerator, providing a higher level of customization and adjustment capabilities for particle therapy in the medical field.
[0050] In one embodiment, the size of the coupling holes in the energy-switch side cavity near the bunching section is larger than that of the coupling holes away from the bunching section.
[0051] Specifically, the size of the coupling holes in the energy-switch side cavity near the bunching section is set to be larger than that of the coupling holes away from the bunching section. In actual operation, this design takes into account the bunching effect of particles in the bunching section, making the coupling holes near the bunching section relatively larger. This size difference helps to achieve a smoother transition when the particle beam passes through the accelerator, thereby increasing the particle density and bunching effect. On the contrary, the coupling holes away from the bunching section are smaller, which helps to maintain a lower particle density to adapt to the gradually increasing speed of the particles during the acceleration process. This differential size design optimizes the entire accelerator system, ensuring a smooth transition in different parts and ultimately improving the performance and efficiency of the particle accelerator. Among them, since the speed of electrons is relatively low when they are just emitted from the electron gun, the particle diffusion caused by the space charge force is relatively obvious. Therefore, when designing the accelerating tube cavity chain, special designs are made for the first few cavities (usually 2 - 4), making them more suitable for accelerating particles with a lower speed and having a bunching effect at the same time. These cavities are called the bunching section of the accelerating tube cavity chain. The bunching section has a great influence on the overall tube capture rate of the accelerating tube cavity chain (the outgoing current of the accelerating tube cavity chain / the incoming current of the accelerating tube cavity chain). The bunching section adopts a segmented design, which is divided into a linear bunching section and a uniform bunching section. In the linear bunching section, the cavity phase velocity and electric field increase linearly. In the uniform bunching section, the cavity phase velocity remains unchanged and the electric field decreases linearly. By optimizing the length of the uniform bunching section, the longitudinal acceleration phase of the electron beam can be easily controlled, thereby optimizing the capture efficiency. After the electrons pass through the bunching section, the electrons are accelerated to near the speed of light. Due to the relativistic effect, the subsequent cavities have a relatively small effect on changing the speed of the electrons (the electron kinetic energy is still increasing). The acceleration section applied to particles with a near-light speed for this section is called the light-speed section.
[0052] In this embodiment, this differential design of the coupling hole size takes into account the bunching effect, enabling the medical particle accelerator to operate more smoothly and providing more precise and safe treatment for patients.
[0053] In one embodiment, the distance between the two side cavity nose cones is greater than the diameter of the energy-switch probe.
[0054] Specifically, the distance between the two side cavity nose cones is set to be less than the diameter of the energy switch probe, and the sizes of these two side cavity nose cones are different. In actual operation, this design takes into account the diameter of the energy switch probe and the relative positions between the side cavity nose cones. The distance between the two side cavity nose cones being less than the diameter of the probe ensures that the probe can move between the side cavity nose cones without obstruction. This design plays a crucial role in the particle acceleration and guiding processes, ensuring that the probe can freely pass through between the side cavity nose cones to achieve flexible control of the particle beam. At the same time, the different sizes of the two side cavity nose cones further enhance the diversity of the design. This differential design may have subtle but important effects on the guiding and bunching of the particle beam, especially under different energies and treatment requirements. By adjusting the sizes of the side cavity nose cones, the flow characteristics of the particle beam can be more precisely customized and optimized, thereby improving the adaptability and treatment effect of the medical particle accelerator.
[0055] In this embodiment, by arranging the distance and sizes of the side cavity nose cones, the free movement of the energy switch probe is ensured, and at the same time, a more flexible and diverse operation mode is provided for the medical particle accelerator, which helps to improve the level of individualized treatment.
[0056] In a non-limiting embodiment, the energy switch side cavity is located in the light speed section of the accelerating tube cavity chain.
[0057] Specifically, the energy switch side cavity is arranged in the light speed section of the accelerating tube cavity chain. This design takes into account the special properties of the light speed section during the particle acceleration process to optimize the guiding and control of the particles. Specifically, the position of the energy switch side cavity within the light speed section means that the speed of the particles in this section is already close to the speed of light. This layout helps to make full use of the characteristics of the particles in high-speed motion, enabling more precise and flexible control of the particles through the energy switch side cavity. The presence of the energy switch side cavity can more accurately guide the particles within the light speed section, adjusting their trajectories and speeds to meet different types of treatment requirements.
[0058] In this embodiment, by placing the energy switch side cavity in the light speed section of the accelerating tube cavity chain, the hardware solution optimizes the operation efficiency of the accelerator and improves the precise control ability of the particle beam. This design not only makes the accelerator more flexible to adapt to different treatment scenarios, but also is expected to improve the precision and effect of treatment, providing more personalized medical services for patients.
[0059] In a non-limiting embodiment, the working mode of the accelerating tube cavity chain is the π / 2 mode.
[0060] Specifically, the operating mode of the accelerating cavity chain is set to the π / 2 mode. The selection of this operating mode involves the phase change experienced by the particles during the acceleration process. Among them, the π / 2 mode: Since the propagation speed of electromagnetic waves in a vacuum is the speed of light, in order to synchronize the phase velocity of the electromagnetic field with that of the charged particles, the accelerating cavity chain is designed into different types of periodic structures. For the same structure, according to the different transmission phases of the electromagnetic field in a periodic structure unit (or it can be understood as how many periodic unit structures are required for an electromagnetic wave cycle), it can be divided into different modes. The π / 2 mode is used in this application, that is, the phase difference of the electromagnetic wave transmission between two adjacent periodic units is π / 2. When the accelerating cavity chain operates in the π / 2 mode, half of the cavities are located at the position where the electric field amplitude is 0 and do not act on the charged particles, which are called coupled cavities. Therefore, a double-periodic structure that compresses and moves the coupled cavities away from the axis is introduced to increase the acceleration efficiency per unit length of the entire tube. It is called the side-coupled acceleration structure. In this structure, the coupled cavity is also called the energy-switching side cavity, and the accelerating cavity on the axis is called the main cavity. In the π / 2 mode, the operating phase of the accelerating cavity chain is set to π / 2, which means that after the particles undergo the acceleration process, their phase changes by 90 degrees. Specifically, the operating mechanism of this mode may include introducing specific phase control devices when the particles pass through the accelerating cavity chain, so that the phase of the particles changes in the π / 2 mode. The selection of this operating mode is related to the acceleration, bunching, and guiding of the particles. The operating mechanism of the π / 2 mode may have a special impact on the motion trajectory and speed of the particles during the acceleration process, thereby optimizing the performance of the accelerator. The application of this mode may be to better adapt to specific treatment requirements and improve the effectiveness and accuracy of particle therapy.
[0061] In this embodiment, the operating mode of the π / 2 mode provides a specific operating mode for the medical particle accelerator, and regulates the motion state of the particles through phase changes, which is expected to achieve more flexible and optimized particle control during the treatment process.
[0062] In one embodiment, the energy-switching side cavities of each accelerating device are located after the coupled cavity where the power source is connected to the accelerator.
[0063] Specifically, the energy-switching side cavities of each accelerating device are arranged after the coupled cavity where the power source is connected to the accelerator. In actual operation, this layout makes the energy-switching side cavities located after the position connected to the power source. This choice of position helps to ensure that the energy-switching side cavities can accurately guide and control the particle beam after the microwave power regulation. When the microwave power changes under the adjustment of the power source, the position of the energy-switching side cavities can better adapt to these changes, ensuring the stable acceleration and guiding process of the particles.
[0064] In this embodiment, the design of the energy switch side cavity being located after the coupling cavity helps to improve the overall stability and efficiency of the accelerator system. Such a layout not only optimizes the hardware structure but also enhances the accuracy and adaptability of the medical particle accelerator during the treatment process, providing a more reliable treatment plan for patients.
[0065] It should be understood that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.
[0066] The above-described embodiments merely represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.
[0067] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
[0068] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0069] In this application, unless otherwise clearly specified or defined, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0070] In this application, unless otherwise clearly specified or defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.
[0071] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.
[0072] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.
[0073] The above-described embodiments merely represent several implementation manners of this application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of this application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the protection scope of this application shall be subject to the appended claims.
Claims
1. An acceleration device, characterized in that, The acceleration device includes an acceleration tube cavity chain and at least one energy switch side cavity; wherein, the energy switch side cavity is connected to two adjacent main cavities in the acceleration tube cavity chain through coupling holes; a pair of side cavity nose cones with asymmetric dimensions are arranged in the energy switch side cavity; an energy switch probe is arranged at the top of the energy switch side cavity, and the energy switch probe extends from the top of the energy switch side cavity between the two side cavity nose cones.
2. The acceleration device according to claim 1, wherein The overall shape of the energy switch side cavity is a semi-cylindrical shape, the rectangular plane of the semi-cylindrical shape is close to the main cavity and serves as the bottom surface of the side cavity of the energy switch side cavity; the coupling holes are opened on the bottom surface of the side cavity.
3. The acceleration device according to claim 2, wherein The energy switch probe can extend to contact the bottom surface of the side cavity of the energy switch side cavity.
4. The acceleration device according to claim 3, wherein The penetration depth of the energy switch probe in the energy switch side cavity can be controlled to adjust the electric field strength ratio between two adjacent main cavities.
5. The acceleration device according to claim 1, characterized in that It further includes a measurement unit, and the measurement unit is used to measure the penetration depth of the energy switch probe in the energy switch side cavity.
6. The acceleration device according to claim 1, characterized in that, The acceleration device further includes a power source; the power source is used to provide energy for the acceleration device.
7. The acceleration device according to claim 1, characterized in that, The size of the coupling hole in the energy switch side cavity close to the bunching section is larger than the size of the coupling hole far from the bunching section.
8. The acceleration device according to claim 1, characterized in that, The distance between the two side cavity nose cones is greater than the diameter of the energy switch probe.
9. The acceleration device according to claim 1, wherein The energy switch side cavity is located in the light speed section of the acceleration tube cavity chain.
10. The acceleration device according to claim 1, wherein, The working mode of the acceleration tube cavity chain is the π / 2 mode.