A beam distribution system and irradiation terminal based on multi-angle irradiation

Abstract

The present invention relates to a beam distribution system and irradiation terminal based on multi-angle irradiation, wherein the beam distribution system comprises: a fixed beam line and a rotating beam line, both of which are fixed on a rotating frame; the rotating beam line comprises a rotating section single dipole magnet, a horizontal beam line and a plurality of inclined beam lines at a certain angle to the ground, the horizontal beam line and the plurality of inclined beam lines are branches of the fixed beam line, the beam pre-separated by the rotating section single dipole magnet enters the horizontal beam line or the plurality of inclined beam lines, and the rotating section single dipole magnet is electrically connected to a variable pre-excitation full energy storage power supply. The system adopts a one-to-many solution, that is, only one beam line is required for one irradiation direction, and a plurality of beam distribution lines are used to form multi-angle irradiation, and the beam splitting direction is controlled by a single dipole magnet. At the same time, a rotation point is designed in front of the dipole magnet, and the beam line is rotated to form a multi-terminal layout without adding other beam lines, and finally a layout of multi-irradiation terminals and single-terminal multi-angle irradiation is realized.

Description

Technical Field

[0001] The invention relates to a beam distribution system based on multi-angle irradiation and an irradiation terminal, belonging to the technical field of accelerators. Background Art

[0002] With the continuous development of science and technology, accelerator devices of different types and energies, such as electrostatic accelerators, cyclotrons, linear accelerators, synchrotrons, and laser accelerators, have been successfully designed and built to meet the requirements of atomic physics, nuclear physics, materials and biological irradiation, and medical fields. Almost all of the above accelerators need to use beam distribution lines to transport ion beams to experimental terminals. Since heavy ion beams have advantages in physics and biology, they have high relative biological effects, can cause double-strand breaks in cancer cell DNA, and are not prone to recurrence. They are particularly suitable for the treatment of stubborn tumors that are not suitable for surgery and are insensitive to conventional radiation. They are considered to be the most ideal tumor radiotherapy rays in the 21st century. In order to reduce the damage of ion beams to normal cells between the skin and tumors, the total dose of the beam irradiating tumor cells is dispersed to multiple angles for irradiation. Common irradiation directions include horizontal terminals, vertical terminals, and 45° terminals. For an experimental terminal, a corresponding beam distribution line will be designed, that is, a one-to-one design concept will be adopted. And for each irradiation angle in each treatment room, there will also be a beam line corresponding to it. The optical design is difficult and the beam line is very long. For vertical and 45° fixed terminals, large-sized and heavy deflection magnets are required to achieve beam climbing and passing. The number of components for beam distribution is large, the scale is large, the occupied area is large, and the cost is high. At the same time, the heavy magnets need to be fixed on the vertical wall, which has high installation risks and is difficult to install. Internationally, rotating gantry technology is also used to achieve multi-angle irradiation therapy, but the rack itself is huge in size and weight, difficult to process, and has high installation and maintenance costs. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a beam distribution system and irradiation terminal based on multi-angle irradiation. The system adopts a one-to-many solution, that is, only one beam line is required for one irradiation direction, and multiple beam distribution lines are used to form multi-angle irradiation. The beam splitting direction is controlled by a single dipole magnet. At the same time, a rotation point is designed in front of the dipole magnet to rotate the beam line to form a multi-terminal layout without adding other beam lines, ultimately realizing a layout of multiple irradiation terminals and single-terminal multi-angle irradiation.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A beam delivery system based on multi-angle irradiation, comprising:

[0006] The fixed wire harness and the rotating wire harness are both fixed on the rotating frame and are connected by a magnetic fluid sealing device in a rotating dynamic seal;

[0007] The rotating beam line includes a single dipole magnet in a rotating section, a horizontal beam line, and several inclined beam lines that are at a certain angle to the ground. The horizontal beam line and the several inclined beam lines are branches of the fixed beam line. The beam pre-separated by the single dipole magnet in the rotating section enters the horizontal beam line or the several inclined beam lines. The single dipole magnet in the rotating section is electrically connected to a variable pre-excitation full-energy storage power supply.

[0008] In the beam delivery system based on multi-angle irradiation, preferably, the fixed beam line comprises a 90° dipole magnet and a plurality of quadrupole magnets embedded in the 90° dipole magnet, or;

[0009] The fixed beam line includes a 90° dipole magnet and a plurality of quadrupole magnets, and the plurality of quadrupole magnets and the 90° dipole magnet are of split design.

[0010] In the beam delivery system based on multi-angle irradiation, preferably, the horizontal beam line comprises a rotating section dipole magnet and a plurality of quadrupole magnets embedded in the rotating section dipole magnet, or;

[0011] The horizontal beam line includes a rotating section dipole magnet and a plurality of quadrupole magnets, and the plurality of quadrupole magnets and the rotating section dipole magnet are of split design.

[0012] In the beam delivery system based on multi-angle irradiation, preferably, the inclined beam line includes a vertical beam line, and the vertical beam line includes two rotating section dipole magnets and a plurality of quadrupole magnets embedded in the rotating section dipole magnets, or;

[0013] The vertical beam line includes two rotating section dipole magnets and a plurality of quadrupole magnets, and the plurality of quadrupole magnets and the rotating section dipole magnet are of split design.

[0014] In the beam delivery system based on multi-angle irradiation, preferably, the inclined beam line includes a plurality of acute-angle beam lines, the acute-angle beam lines form an acute angle with the ground, and the acute-angle beam line includes a rotating section dipole magnet and a plurality of quadrupole magnets embedded in the rotating section dipole magnet, or;

[0015] The acute-angle beam line includes a rotating section dipole magnet and a plurality of quadrupole magnets, and the plurality of quadrupole magnets and the rotating section dipole magnet are of split design.

[0016] In the beam distribution system based on multi-angle irradiation, preferably, the beam output ends of the horizontal beam line and the plurality of inclined beam lines are provided with scanning magnets.

[0017] In the beam distribution system based on multi-angle irradiation, preferably, the 90° dipole magnet is a unidirectional or bidirectional superconducting dipole magnet, or,

[0018] The 90° two-pole magnet is a common two-pole magnet that is unidirectional or bidirectional.

[0019] In the beam distribution system based on multi-angle irradiation, preferably, the rotating section dipole magnet is a unidirectional or bidirectional superconducting dipole magnet, or,

[0020] The rotating section dipole magnet is a common unidirectional or bidirectional dipole magnet.

[0021] A second aspect of the present invention provides a beam delivery terminal based on multi-angle irradiation, comprising any one of the beam delivery systems based on multi-angle irradiation described above, wherein the single dipole magnet of the rotating section is a unidirectional dipole magnet, and further comprising:

[0022] A plurality of operation rooms, wherein the plurality of operation rooms are evenly arranged along the circumferential direction of the horizontal beam line rotation to form a layer of operation rooms, and a mounting hole is opened on the wall of each of the operation rooms;

[0023] Irradiation heads, a number of which are arranged one by one in correspondence with the operation chambers, and the irradiation heads pass through the mounting holes to receive the ion beam transmitted by the rotating beam line and irradiate the patient or the sample;

[0024] The driving mechanism is connected to the rotating frame in a transmission manner and is used to drive the rotating frame to rotate 0-360 degrees along the circular track, thereby making the rotating beam a beam that can rotate 0-360 degrees.

[0025] The third aspect of the present invention provides a beam delivery terminal based on multi-angle irradiation, comprising any one of the beam delivery systems based on multi-angle irradiation described above, wherein the single dipole magnet of the rotating section is a bidirectional dipole magnet, and further comprising:

[0026] A plurality of operation rooms, wherein the plurality of operation rooms are evenly arranged along the circumferential direction of the horizontal beam line rotation to form a layer of operation rooms, and a mounting hole is opened on the wall of each of the operation rooms;

[0027] Irradiation heads, a number of which are arranged one by one in correspondence with the operation chambers, and the irradiation heads pass through the mounting holes to receive the ion beam transmitted by the rotating beam line and irradiate the patient or the sample;

[0028] The driving mechanism is connected to the rotating frame in a transmission manner and is used to drive the rotating frame to rotate 0-180 degrees along the circular track, thereby making the rotating beam a beam that can rotate 0-180 degrees.

[0029] The present invention adopts the above technical solution, which has the following advantages:

[0030] 1. The beam distribution system involved in the present invention realizes the transmission of the beam to the terminal at multiple angles by adjusting the magnetic field of a single bifurcated dipole magnet, breaking the conventional scheme of using multiple independent dipole magnets to form multi-angle irradiation, effectively reducing the number of dipole magnets and reducing the cost of the distribution system. At the same time, the beam is quickly switched by the dipole magnet at room temperature, avoiding the mode of switching an entire beam line in the common scheme, with short time and high beam utilization.

[0031] 2. The present invention can realize multi-terminal layout on a unified plane through magnetic fluid rotary seal, greatly reducing the number of beam distribution lines between the accelerator and different experimental terminals, and avoiding the difficulty and high risk of equipment installation in the climbing and down-through process. At the same time, the rotating section adopts a superconducting solution with a small rotation radius, which can greatly reduce the scale of the entire device and reduce the construction cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A diagram of a four-angle irradiation beam distribution system in which a quadrupole magnet is embedded in a dipole magnet provided in the first embodiment of the present invention;

[0033] Figure 2 A layout diagram of a four-angle illumination terminal in which a quadrupole magnet is embedded in a dipole magnet provided in the first embodiment of the present invention;

[0034] Figure 3 A diagram of a four-angle irradiation beam distribution system in which a dipole magnet and a quadrupole magnet are independent of each other, provided in a second embodiment of the present invention;

[0035] Figure 4 A layout diagram of a four-angle illumination terminal with two-pole magnets and four-pole magnets that are independent of each other provided in the second embodiment of the present invention;

[0036] The marks in the figure are as follows:

[0037] 1-1 is a fixed section dipole magnet; 1-2 to 1-6 are rotating section dipole magnets; 2 is a rotating section single dipole magnet; 3-1 to 3-11 are quadrupole magnets; 4-1 to 4-4 are scanning magnets; 5 is a magnetic fluid sealing device; 6 is a vertical distribution line; 7 is a 45° distribution line; 8 is a 30° distribution line; 9 is a horizontal distribution line; 10-1 to 10-8 are four-angle irradiation terminal treatment rooms; 11 is a horizontal rotating bracket. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention is described clearly and completely below. 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 persons in the art without creative work are within the scope of protection of the present invention.

[0039] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second", "third", "fourth" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0040] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside", "outside", "inner side", "outer side", "below", "above", etc. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures.

[0041] The beam transmission line is used to realize the beam distribution between accelerators or from accelerator to experimental terminal. At present, the conventional beam line and experimental terminal adopt a one-to-one design scheme, that is, one terminal corresponds to one beam distribution line. If a large number of experimental terminals are to be designed, the number of beam distribution lines required is also large, which occupies a large area and has a high cost. At the same time, a single experimental terminal usually has only one irradiation angle. To increase the non-horizontal irradiation angle (such as 45° and 90°, etc.), it can only be done by climbing and passing the beam line, and heavy magnets need to be fixed on the vertical wall, which has high installation risks and is difficult to install.

[0042] In order to increase the number of terminals and irradiation angles, and reduce the floor space and construction cost of the device, the present invention proposes a beam distribution system based on multi-angle irradiation. The design concept is to adopt a one-to-many solution, that is, only one beam line is required for one irradiation direction, and multiple beam distribution lines are used to form multi-angle irradiation, and the beam splitting direction is controlled by a single dipole magnet. At the same time, a rotation point is designed in front of the dipole magnet to rotate the beam line to form a multi-terminal layout without adding other beam lines, and finally a multi-terminal and single-terminal multi-angle irradiation layout is realized.

[0043] like Figure 1 , 3 As shown, the beam distribution system based on multi-angle irradiation involved in the present invention includes: a fixed beam line and a rotating beam line, which are connected by a magnetic fluid sealing device 5 for rotating dynamic sealing (to meet the high vacuum requirement in the rotating process pipeline), and the fixed beam line and the rotating beam line adopt a superconducting design scheme, including superconducting arc-shaped inclined solenoids CCT and DCT, but not limited to this, and can also adopt the design of ordinary dipole magnets. The fixed beam line includes a fixed segment dipole magnet 1-1 and a plurality of quadrupole magnets 3-1 to 3-3, and the plurality of quadrupole magnets 3-1 to 3-3 are embedded in the fixed segment dipole magnet 1-1 (such as Figure 1 As shown) or with a plurality of quadrupole magnets 3-1 to 3-2 fixed segment two-pole magnet 1-1 is a split design (such as Figure 3 As shown in the figure), it is used to meet the matching requirements of compact optical design and efficient optical transmission.

[0044] Furthermore, if Figure 1 , 3 As shown, the rotating beam line includes a rotating section single dipole magnet 2, a horizontal beam line, and several inclined beam lines at a certain angle to the ground. The horizontal beam line and the several inclined beam lines are branches of the fixed beam line, and the beam pre-separated by the rotating section single dipole magnet 2 enters the horizontal beam line or the several inclined beam lines. The rotating section single dipole magnet 2 used to switch the beam is an ordinary dipole magnet (special note: the rotating section single dipole magnet 2 (magnetic field change rate 12T / s) in this application can also be a large-aperture superconducting dipole magnet, but the beam switching time will increase, because the magnetic field change rate of the superconducting dipole magnet is very slow, and the change rate is usually less than 1T / s under high magnetic fields.), which can be unidirectional or bidirectional; the secondary magnets in the fixed beam line and the inclined beam line can be superconducting or ordinary dipole magnets. The ordinary dipole magnet in the present invention is relative to the superconducting dipole magnet. The ordinary dipole magnet takes away the heat generated by power-on through cooling water. There are no special requirements for the external working environment, and the magnetic field is relatively small (usually <2T). Superconducting dipole magnets require the superconducting coil to be immersed in low-temperature liquid helium for cooling. They are characterized by high magnetic field (3T) and low current loss.

[0045] Specifically, the horizontal beam line includes a rotating section dipole magnet 1-6 and a plurality of quadrupole magnets 3-8 to 3-11 embedded in the rotating section dipole magnet 1-6. Figure 1 As shown; or, the horizontal beam line includes a rotating section dipole magnet 1-6 and a plurality of quadrupole magnets 3-9 to 3-10, and the plurality of quadrupole magnets 3-9 to 3-10 and the rotating section dipole magnet 1-6 are of split design, such as Figure 3 Of course, the number of quadrupole magnets is not limited to four or two, and can be selected according to actual conditions.

[0046] The inclined beam line includes a vertical beam line, which includes two rotating section dipole magnets 1-2 and 1-3, and a plurality of quadrupole magnets 3-4 to 3-6 embedded in the rotating section dipole magnets 1-2 and 1-3; or, the vertical beam line includes two rotating section dipole magnets 1-2 and 1-3 and a plurality of quadrupole magnets 3-3 to 3-4, and the plurality of quadrupole magnets 3-3 to 3-4 and the rotating section dipole magnets 1-2 and 1-3 are of a split design.

[0047] The inclined beam line includes several acute-angle beam lines, which form an acute angle with the ground. The acute-angle beam line includes rotating section dipole magnets 1-4 and 1-5 and several quadrupole magnets 3-7 and 3-8 embedded in the rotating section dipole magnets 1-4 and 1-5; or, the acute-angle beam line includes rotating section dipole magnets 1-4 and 1-5 and several quadrupole magnets 3-5 to 3-8, and the several quadrupole magnets 3-5 to 3-8 and the rotating section dipole magnets 1-4 and 1-5 are of split design.

[0048] The inclined beam lines of the present invention are not limited to 4, and more beam lines can be set. As long as the acute angle beam line is within 0-90°, it can be arranged. It is also feasible in actual engineering construction. This is because the rotating beam line of the present invention is provided with a rotating section single dipole magnet 2, which pre-separates the beam in advance to make the beam produce a certain separation angle. After entering the inclined beam line, there is no need to set too many dipole magnets to make the beam reach the required separation angle.

[0049] The differences between the beam distribution system involved in the present invention and the prior art ZL202211251705.1 are as follows:

[0050] 1. The irradiation angle of the treatment room in the prior art ZL202211251705.1 is preferably two or three, and it is difficult to achieve four or more angles of irradiation in terms of optics and layout. This is because when the patent has been applied for more than three angles, the number of diodes required will increase a lot, and the vertical height will also increase a lot. For details, please refer to the description of Article 2.

[0051] 2. In the prior art ZL202211251705.1, each rotating beam line is deflected by multiple independent dipole magnets to form different irradiation angles, while the present invention forms four or more different irradiation angles by deflecting a single dipole iron (a single dipole magnet 2 in the rotating section), which significantly reduces the number of dipole magnets and reduces the cost of the distribution system.

[0052] Specifically, the prior art ZL202211251705.1 forms corresponding irradiation angles by deflecting a single dipole magnet on a vertical beam line, that is, to achieve more than two different irradiation angles in a treatment room at the same time, it is necessary to set a corresponding number of dipole magnets on the vertical beam line to form inclined beam line branches. For feasibility and to meet the optical requirements of the beam, the spacing between the dipole magnets must maintain a certain spatial distance. In addition, the size of the dipole magnets themselves causes the height of the overall rotating beam line to be very high. The present invention forms four or more different irradiation angles by deflecting a single dipole iron (a single dipole magnet 2 in the rotating section), which significantly reduces the number of dipole magnets and reduces the overall height of the rotating beam line. For example, if four irradiation angles need to be provided simultaneously in a treatment room, the overall height of the present invention can be reduced to 8 meters, which is 60% shorter than the prior art, and the rotation radius is only 4 meters, which is 50% smaller than the prior art.

[0053] The single dipole magnet 2 of the rotating section is used to control the direction of beam transmission. Since multiple branch beam lines need to be generated from the single dipole magnet 2 of the rotating section, and the beam needs to be switched quickly, the present invention adopts a variable pre-excitation full energy storage power supply solution (see Chinese patent ZL201820198102.2 for details), which can realize rapid changes in magnetic field and current, avoiding the need to switch a whole beam line separately in the conventional solution. The beam distribution system of the present invention adopts a one-to-many solution, consisting of a dipole magnet with rapid magnetic field switching (a single dipole magnet 2 of the rotating section) and multiple beam distribution lines (inclined beam lines). The single dipole magnet 2 of the rotating section is used to control the irradiation direction of beam transmission. One beam distribution line corresponds to one irradiation direction. The irradiation angle can be horizontal, 30°, 45°, 60°, 75° or a combination of one or more directions of any other angle, thereby forming a multi-angle irradiation terminal. A rotation point is designed in front of a single dipole magnet 2 in the rotating section, and a multi-terminal layout is formed by rotating multiple beam lines, which greatly reduces the number of beam distribution lines in conventional solutions, helps to reduce the scale of the entire device and reduce the construction cost of the device. The multi-angle irradiation terminal has a gantry function, which solves the problems of large weight and volume, high cost and difficult installation of gantry.

[0054] On the other hand, since the rotating beam line adopts an integrated superconducting coil solution (quadrupole magnet embedded in dipole magnet), it can better realize the separation of the four beam lines required for four-angle irradiation, with a smaller rotation radius and lighter rotation weight, which is conducive to high-precision positioning of the irradiation terminal after rotation, forming a four-angle irradiation layout of horizontal, vertical, 30° and 45°.

[0055] The beam distribution system of the present invention avoids the design of multiple horizontal distribution lines, multiple vertical terminal distribution lines, and multiple 45° terminal distribution line solutions, greatly reduces the number of beam distribution lines between the accelerator and different experimental terminals, significantly reduces the design difficulty and the number of components, and is conducive to reducing the scale of the entire device and reducing the construction cost of the device. At the same time, the multi-angle irradiation terminal has the function of a gantry, which solves the problems of large weight and volume of gantry, high cost, and difficulty in installation. The cancer treatment device is designed using the concept of the present invention, and the length and floor space of the beam distribution line are reduced by about 2 / 3 or more. This design concept is not only suitable for cancer treatment devices, but also for other types of accelerator devices with multiple beam distribution lines. At the same time, the present invention uses a single dipole magnet (a single dipole magnet 2 in the rotating section) to control the beam splitting direction, wherein the dipole magnet adopts a variable pre-excitation full energy storage power supply solution (patent number ZL201820198102.2), which can quickly switch the angle irradiation direction, avoiding the need to switch a whole beam line separately in the conventional solution, with a shorter switching time and a higher beam utilization rate.

[0056] A second aspect of the present invention provides a beam distribution irradiation terminal, comprising the beam distribution system described above, and further comprising: a plurality of operation rooms, the plurality of operation rooms being evenly arranged along the circumferential direction of the horizontal beam line rotation to form a layer of operation rooms, and a mounting hole being opened on the wall of each operation room;

[0057] There are several irradiation heads, each of which is arranged in correspondence with the operating room. The irradiation heads pass through the mounting holes to receive the ion beam transmitted by the rotating beam line and irradiate the patient or the sample;

[0058] The driving mechanism is connected to the rotating frame for driving the rotating frame to rotate 0-360 degrees along the circular track, thereby making the rotating beam line a beam line that can rotate 0-360 degrees.

[0059] The rotating section single dipole magnet 2 in the above irradiation terminal is a unidirectional dipole magnet, and the rotating frame needs to rotate 360°. When the rotating section single dipole magnet 2 is bidirectional, the rotating frame only needs to rotate 180°, further improving the irradiation efficiency.

[0060] like Figure 2 , 4 As shown, the beam distribution system is fixed on the horizontal rotating bracket 11. As the horizontal rotating bracket 11 rotates around the axis of rotation, the ion beam is accurately directed to different terminals. During the rotation process, at least 8 multiple terminals can be designed on the same level, and each terminal has four angles of irradiation. The irradiation terminal of the present invention breaks the conventional solution of one beam line corresponding to one terminal, reduces the difficulty of optical design, and greatly shortens the beam line length and the device footprint.

[0061] 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 beam delivery system based on multi-angle irradiation, characterized in that: include: The fixed wire harness and the rotating wire harness are both fixed on the rotating frame and are connected by a magnetic fluid sealing device in a rotating dynamic seal; The rotating beam line includes a single dipole magnet in a rotating section, a horizontal beam line, and several inclined beam lines that are at a certain angle to the ground. The horizontal beam line and the several inclined beam lines are branches of the fixed beam line. The beam pre-separated by the single dipole magnet in the rotating section enters the horizontal beam line or the several inclined beam lines. The single dipole magnet in the rotating section is electrically connected to a variable pre-excitation full-energy storage power supply.

2. The beam delivery system based on multi-angle irradiation according to claim 1, characterized in that: The fixed beam line includes a 90° dipole magnet and a plurality of quadrupole magnets embedded in the 90° dipole magnet, or; The fixed beam line includes a 90° dipole magnet and a plurality of quadrupole magnets, and the plurality of quadrupole magnets and the 90° dipole magnet are of split design.

3. The beam delivery system based on multi-angle irradiation according to claim 1, characterized in that: The horizontal beam line includes a rotating section dipole magnet and a plurality of quadrupole magnets embedded in the rotating section dipole magnet, or; The horizontal beam line includes a rotating section dipole magnet and a plurality of quadrupole magnets, and the plurality of quadrupole magnets and the rotating section dipole magnet are of split design.

4. The beam delivery system based on multi-angle irradiation according to claim 1, characterized in that: The inclined beam line includes a vertical beam line, and the vertical beam line includes two rotating section dipole magnets and a plurality of quadrupole magnets embedded in the rotating section dipole magnets, or; The vertical beam line includes two rotating section dipole magnets and a plurality of quadrupole magnets, and the plurality of quadrupole magnets and the rotating section dipole magnet are of split design.

5. The beam delivery system based on multi-angle irradiation according to claim 1, characterized in that: The inclined beam line includes a plurality of acute angle beam lines, the acute angle beam lines form an acute angle with the ground, and the acute angle beam line includes a rotating section dipole magnet and a plurality of quadrupole magnets embedded in the rotating section dipole magnet, or; The acute-angle beam line includes a rotating section dipole magnet and a plurality of quadrupole magnets, and the plurality of quadrupole magnets and the rotating section dipole magnet are of split design.

6. The beam delivery system based on multi-angle irradiation according to claim 1, characterized in that: The beam output ends of the horizontal beam line and the plurality of inclined beam lines are all provided with scanning magnets.

7. The beam delivery system based on multi-angle irradiation according to claim 2, characterized in that: The 90° dipole magnet is a unidirectional or bidirectional superconducting dipole magnet, or, The 90° two-pole magnet is a common two-pole magnet that is unidirectional or bidirectional.

8. The beam delivery system based on multi-angle irradiation according to any one of claims 3 to 5, characterized in that: The rotating section dipole magnet is a unidirectional or bidirectional superconducting dipole magnet, or, The rotating section dipole magnet is a common unidirectional or bidirectional dipole magnet.

9. A beam delivery irradiation terminal based on multi-angle irradiation, characterized in that: The beam distribution system based on multi-angle irradiation comprises the beam distribution system based on multi-angle irradiation according to any one of claims 1 to 8, wherein the single dipole magnet of the rotating section is a unidirectional dipole magnet, and further comprises: A plurality of operation rooms, wherein the plurality of operation rooms are evenly arranged along the circumferential direction of the horizontal beam line rotation to form a layer of operation rooms, and a mounting hole is opened on the wall of each of the operation rooms; Irradiation heads, a number of which are arranged one by one in correspondence with the operation chambers, and the irradiation heads pass through the mounting holes to receive the ion beam transmitted by the rotating beam line and irradiate the patient or the sample; The driving mechanism is connected to the rotating frame in a transmission manner and is used to drive the rotating frame to rotate 0-360 degrees along the circular track, thereby making the rotating beam a beam that can rotate 0-360 degrees.

10. A beam distribution irradiation terminal based on multi-angle irradiation, characterized in that: The beam distribution system based on multi-angle irradiation comprises the beam distribution system based on multi-angle irradiation according to any one of claims 1 to 8, wherein the single dipole magnet of the rotating section is a bidirectional dipole magnet, and further comprises: A plurality of operation rooms, wherein the plurality of operation rooms are evenly arranged along the circumferential direction of the horizontal beam line rotation to form a layer of operation rooms, and a mounting hole is opened on the wall of each of the operation rooms; Irradiation heads, a number of which are arranged one by one in correspondence with the operation chambers, and the irradiation heads pass through the mounting holes to receive the ion beam transmitted by the rotating beam line and irradiate the patient or the sample; The driving mechanism is connected to the rotating frame in a transmission manner and is used to drive the rotating frame to rotate 0-180 degrees along the circular track, thereby making the rotating beam a beam that can rotate 0-180 degrees.

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