High-gain superconducting cyclotron accelerator capable of accelerating H+2 and 12C6+ ions

Abstract

The application provides a high-gain superconducting cyclotron capable of accelerating H + 2 and 12 C 6+ The high-gain superconducting cyclotron of ions comprises a double ion source system respectively installed on two sides below the accelerator, an injection line transmission system respectively installed below the accelerator and shared by the double ion source system, a spiral high-frequency cavity system for accelerating particles, which is respectively installed between magnetic poles on the upper and lower sides of the central plane of the accelerator, a 12C6+ ion deflection plate extraction system installed at the deflection plate exit of the central plane of the accelerator, and an H+2 stripping membrane extraction system installed at the stripping exit of the central plane of the accelerator. The application realizes the continuous adjustment of the proton beam and the high-energy 12C6+ ion beam in a large energy range on the same cyclotron for the first time, and achieves one machine with three uses. The application develops a superconducting cyclotron capable of accelerating H+2 and 12C6+ ions based on the injection of an external high-current ion source, which can realize the isochronous acceleration of H+2 and 12C6+ ions without adjusting any main technical parameters of the accelerator such as the magnet and the high frequency.

Description

Technical Field

[0001] This invention relates to the field of cyclotron design, and particularly to a cyclotron capable of accelerating H + 2 and 12 C 6+ High-gain superconducting cyclotron accelerator for ions. Background Technology

[0002] Multi-purpose, high-yield, high-energy-gain accelerators with adjustable extraction energy have important applications in fields such as nuclear physics, public health, advanced energy, and national defense. Especially in the field of ion therapy, cyclotron accelerators have the outstanding advantages of smaller equipment size and lower construction costs, making them more suitable for industrialization.

[0003] However, judging from the scale of accelerators used in ion therapy at home and abroad at present, they generally suffer from problems such as limited types of accelerating particles, non-adjustable extraction energy, or a small adjustment range.

[0004] The reason for accelerating only a single type of particle is that different particle accelerators have different requirements for the high-frequency cavity parameters. If an accelerator is changed to produce a different type of particle, the high-frequency cavity parameters and the magnetic field parameters that work in conjunction with the high-frequency cavity need to be readjusted. These two parameters are the main technical parameters of an accelerator, and the workload of adjusting them is no less than that of rebuilding an accelerator. Because it is so difficult and labor-intensive to implement, for a long time, the vast majority of cyclotron accelerators have been accelerators that accelerate only a single type of particle.

[0005] The reason why the extracted energy is not adjustable or has a small adjustment range is mainly because the extracted beam energy of the cyclotron particle is directly related to the overall size of the accelerator. If the size of the accelerator magnet is increased simply to improve the energy adjustment range, it would be counterproductive. Therefore, most ion therapy accelerators now adopt a fixed extracted energy and use an energy degrader to obtain the required energy ion beam, rather than directly adjusting the extracted beam energy. Summary of the Invention

[0006] This invention addresses the problems existing in the prior art by proposing a method to accelerate H + 2 and 12 C 6+ The high-gain superconducting cyclotron accelerator for ions has two main objectives: first, to solve the problem of accelerating only a single type of particle; and second, to solve the problem of the extraction energy being unadjustable or having a small adjustment range.

[0007] To solve its technical problems, the present invention proposes the following technical solutions:

[0008] A kind of H that can accelerate + 2 and 12 C6+ A high-gain superconducting cyclotron accelerator for ions includes a dual ion source system 1 installed on both sides below the accelerator; an injection line transport system 2 installed below the accelerator and shared by the dual ion source systems 1; a spiral high-frequency cavity system 3 installed on the upper and lower sides of the accelerator's central plane and between the magnetic poles for accelerating particles; a 12C6+ ion deflection plate extraction system 4 installed at the electrostatic deflection plate beam outlet on the accelerator's central plane; and an H2O target stripping extraction system installed at the target stripping outlet on the accelerator's central plane. + 2. Peel-off membrane extraction system 5.

[0009] Its characteristics are:

[0010] The spiral high-frequency cavity 3 system uses four inner rods as inner conductors to significantly increase the accelerating voltage in the extraction region; 12 C 6+ The ion deflection plate extraction system 4 is equipped with dual deflection plates, a perturbation coil positioned before the dual deflection plates, and multiple magnetic channels positioned after the dual deflection plates. The perturbation coil generates a first harmonic magnetic field before the particles enter the deflection plates, increasing the deflection radius of the carbon ions. The dual deflection plates increase the deflection force during particle deflection. The multiple magnetic channels increase the focusing force on the particles after deflection by the deflection plates and further constrain the particle trajectory. The H... + 2. The stripping membrane extraction system (5) is equipped with a double stripping target arranged symmetrically at approximately 180 degrees, which is used to extract protons of different energy ranges at the same time.

[0011] Furthermore, the H mentioned + The 2 stripping membrane extraction system 5 has 2 extraction points. The first extraction point is equipped with a stripping target 1, and the second extraction point is equipped with a stripping target 2. The stripping target 1 is used to extract the protons extracted in one loop, and the stripping target 2 is used to extract the protons extracted in two loops.

[0012] Furthermore, the protons extracted in the first loop have an extraction energy range of 260-300 MeV, and the azimuth angle of the extraction point ranges from 21.5° to 28.4°.

[0013] Furthermore, the protons extracted in the second loop have an extraction energy range of 200-245 MeV, and the azimuth angle of the extraction point ranges from 189° to 196°.

[0014] Furthermore, the dual deflection plates are sequentially provided with a first electrostatic deflection plate and a second electrostatic deflection plate along the direction of particle extraction. A first predetermined loop spacing is obtained through the first electrostatic deflection plate with a voltage of 100 kV / cm, and a second predetermined loop spacing is obtained through the second electrostatic deflection plate with a voltage of 100 kV / cm.

[0015] Furthermore, the number of magnetic channels arranged behind the double deflection plate includes, but is not limited to, five, and each magnetic channel consists of a secondary magnet.

[0016] Furthermore, the first two magnetic channels are relatively far apart and are evenly distributed outside the peak region of the first magnetic pole after the second electrostatic deflection plate; the latter three magnetic channels are relatively far apart and are evenly distributed outside the high-frequency cavity near the foremost end of the outlet.

[0017] Furthermore, the four inner rods of the spiral high-frequency cavity 3 are all 62cm high, with the two thicker inner rods in the middle having a diameter of about 25cm and the thinner inner rods at both ends having a diameter of about 15cm.

[0018] Furthermore, a first set coil spacing of approximately 15 mm is obtained by using a first electrostatic deflection plate with a voltage of 100 kV / cm, and a second set coil spacing of approximately 11 mm is obtained by using a second electrostatic deflection plate with a voltage of 75 kV / cm.

[0019] Furthermore, the perturbation coil is used to generate a first harmonic magnetic field before the particles enter the deflection plate, thereby increasing the deflection radius of the carbon ions by approximately 9.5 mm.

[0020] Advantages and effects of the present invention

[0021] 1. For the first time internationally, a novel method based on external high-current ion source implantation has been developed to accelerate H+ ionization. + 2 and 12 C 6+ A superconducting cyclotron accelerator for ions can achieve H+ ion emission without adjusting any key technical parameters of the accelerator, such as magnets and high frequencies. + 2 and 12 C 6+ Ion isochronous acceleration; H2O achieved for the first time using the same dual-beam injection and transport system. + 2 and 12 C 6+ Ion injection is achieved by a transmission system consisting of deflecting magnets, quadrupole magnets, a focuser, and a solenoid, which injects the beam into the central region of the accelerator. The dual beams use the same transmission system, and the use of superconducting magnets makes the accelerator more compact, further reducing construction costs.

[0022] 2. For the first time, a proton beam and a high-energy 12C6+ ion beam that can be continuously adjusted within a wide energy range were obtained on the same cyclotron accelerator, realizing three functions in one machine: heavy ion therapy, proton therapy and proton imaging. This has important value for integrated particle diagnosis and treatment systems. Attached Figure Description

[0023] Figure 1 This invention provides an embodiment that can accelerate H... + 2 and 12 C6+ A schematic diagram of the overall layout of an ion cyclotron accelerator;

[0024] Figure 2 This is the dual ion source and beam injection transmission system provided in the embodiments of the present invention;

[0025] Figure 3 This is a high-acceleration gradient, high-Q value, high-frequency cavity provided in the embodiments of the present invention;

[0026] Figure 4 This is provided by the embodiments of the present invention. 12 C 6+ Schematic diagram of the ion deflection plate extraction system;

[0027] Figure 5a The H provided in the embodiments of the present invention + 2. Schematic diagram of the lead-out position of the peeling membrane lead-out system;

[0028] Figure 5b The H provided in the embodiments of the present invention + 2. Schematic diagram of the stripping target for the stripping membrane extraction system;

[0029] In the figure: 1: Dual ion source system; 1-1: H + 2ECR ion source; 1-2: 12 C 6+ ECR ion source 2: Injection line transmission system; 2-1: Deflecting magnet; 2-2: Quadrupole magnet; 2-3: Focusing device; 2-4: Solenoid; 3: Helical high-frequency cavity system; 4: 12C6+ ion deflection plate extraction system; 4-2-1: First electrostatic deflection plate; 4-2-2: Second electrostatic deflection plate; 5: H + 2. Radially retractable stripping target of the stripping membrane extraction system; 6-1: Upper yoke; 6-2: Upper magnetic pole; 6-3: Upper vacuum chamber; 6-4: Upper half-coil; 6-5: Lower magnetic pole; 6-6-1: Extracted proton beam line; 6-6-2: Extracted carbon ion beam line; 6-7: Support leg; 6-8: Lower vacuum chamber; 6-9: Lower half-coil; 6-10: Lifting system; 6-11: Lower yoke. Detailed Implementation

[0030] Design principle of the invention

[0031] 1. H +2. Design principle of the double stripping membrane extraction system: Since the carbon ion energy is as high as 400MeV / A, the DC high voltage required to generate sufficient coil spacing is extremely high, resulting in a very high risk of arcing. Therefore, some auxiliary components are needed to work together to generate sufficient coil spacing. The basic scheme here is to place a disturbance coil in the gap of the magnet peak region in front of the deflection plate to generate a first harmonic magnetic field, which makes the deflection radius of the carbon ions increase slightly. After the disturbance coil, two identical electrostatic deflection plates are used, but the electric field of the first one is 100kV / cm and that of the second one is 75kV / cm. The coil spacing is further increased to ensure high-efficiency extraction. After the electrostatic deflection plates, several pure iron block magnetic channels are placed to correct the extraction trajectory of carbon ions. Finally, the carbon ions are extracted from the magnetic yoke.

[0032] 2. Design principle of carbon ion dual deflection plate extraction system: Due to H + After the two particles pass through the stripping membrane, they become two protons. According to the formula for the deflection radius of a charged particle in a magnetic field:

[0033] R = mv / qB

[0034] The mass-to-charge ratio of the proton is only H. + Since the deflection radius R is only half of 2, the stripped proton beam will rotate into the accelerator. It may be extracted after one, two, or more rotations, or it may be lost inside the accelerator. Generally speaking, the more rotations before extraction, the larger the beam envelope and the more difficult extraction. Therefore, we only consider one-turn extraction and two-turn extraction.

[0035] Taking a single-loop extraction as an example, simulations show that the extraction energy range meeting the beam envelope requirements is 260-300 MeV, and the azimuth angle of the extraction point ranges from 21.5° to 28.4°. The same analysis process is applied to a two-loop extraction, with an extraction energy range of 200-245 MeV. To minimize the first harmonics generated by components around the main magnet in the accelerator design, the beam extraction points for both single-loop and two-loop extractions are positioned on opposite sides of the magnetic yoke. Therefore, the stripping films for both types of extractions are placed near a straight line. Calculations show that the distance from both stripping points to the fitted straight line is less than 1.2 cm. Therefore, by controlling the movement of the stripping target mechanical structure along this straight line and fine-tuning its angle, protons can be obtained by stripping at the designed stripping points.

[0036] 3. Design principle of using four inner rods as inner conductors in a spiral high-frequency cavity system: Based on simulation and optimization iterations, the spiral high-frequency cavity uses four inner rods as inner conductors, each 62cm high. The two thicker inner rods in the middle have a diameter of approximately 25cm, while the thinner inner rods at both ends have a diameter of approximately 15cm. This four-inner-rod design significantly increases the accelerating voltage in the extraction region, achieving a voltage ratio of 2.1 between the extraction region and the central region. Increasing the number of inner rods raises the accelerating voltage because: as the inner conductors of the coaxial resonant cavity, the radial electric field component is more concentrated at the location of the inner rods, resulting in a larger integrated accelerating voltage. Therefore, increasing the number of inner rods radially has a significant impact on raising the accelerating voltage in the extraction region.

[0037] 4. The design principle of appropriately reducing the diameter of the inner rods at both ends of the cavity: based on the following qualitative formula:

[0038] I∝US / ρl

[0039] U is the voltage across the inner rod, l is the length of the inner rod, and ρ is the resistivity of the inner rod. The smaller the radius of the inner conductor, the smaller the surface area S, and the smaller the surface current I. The power loss is proportional to I. 2 Therefore, the power loss is also lower. Based on the results of multiple simulations, the diameter of the inner rods at both ends of the cavity was appropriately reduced to control the loss and was determined to be about 15cm.

[0040] Based on the above principles, this invention designs a method that can accelerate H + 2 and 12 C 6+ A high-gain superconducting cyclotron accelerator for ions, such as... Figure 1 A schematic diagram of the overall layout of a cyclotron accelerator capable of accelerating H+2 and 12C6+ ions provided in an embodiment of the present invention. Figure 2 The dual ion source and beam injection transmission system provided in the embodiments of the present invention Figure 3 The high-acceleration gradient, high-Q value high-frequency cavity provided in the embodiments of the present invention Figure 4 The 12C6+ ion deflection plate extraction system provided in the embodiments of the present invention Figure 5a The H provided in the embodiments of the present invention + 2. The schematic diagram of the stripping membrane extraction system shows that it includes a dual ion source system 1 installed on both sides below the accelerator; an injection line transport system 2 installed below the accelerator and shared by the dual ion source system 1; a spiral high-frequency cavity system 3 installed on the upper and lower sides of the accelerator center plane and between the magnetic poles for particle acceleration; a 12C6+ ion deflection plate extraction system 4 installed at the electrostatic deflection plate beam extraction outlet on the accelerator center plane; and an H-type target extraction system installed at the stripping target extraction outlet on the accelerator center plane. +2. The stripping membrane extraction system 5 is characterized by: the spiral high-frequency cavity 3 system using four inner rods as inner conductors to significantly increase the accelerating voltage of the extraction area; the 12C6+ ion deflection plate extraction system 4 is equipped with double deflection plates 4-2-1 and 4-2-2, a perturbation coil 4-1 before the double deflection plates, and multiple magnetic channels after the double deflection plates; the perturbation coil is used to generate a first harmonic magnetic field before the particles enter the deflection plates, thereby increasing the deflection radius of carbon ions; the double deflection plates are used to increase the deflection force when the particles are deflected; the multiple magnetic channels are used to increase the focusing force on the particles after deflection by the deflection plates and further constrain the particle trajectory; the H + 2. The stripping membrane extraction system 5 is equipped with dual stripping targets arranged symmetrically at approximately 180 degrees, used to simultaneously extract protons of different energy ranges.

[0041] Supplementary Note 1:

[0042] 1) The aforementioned dual deflection plate, such as Figure 4 As shown, the first electrostatic deflection plate is 4-2-1, the second electrostatic deflection plate is 4-2-2, and the plurality of magnetic channels are 4-3-1, 4-3-2, 4-3-3, 4-3-4, and 4-3-5.

[0043] 2) The four inner rods are as follows Figure 3 As shown, the four inner rods are 3-1 and 3-2. The two 3-1 inner rods have a relatively thicker diameter, while the two 3-2 inner rods have a relatively thinner diameter. The thicker inner rods are designed to significantly increase the acceleration voltage of the lead-out area, while the two thinner 3-2 inner rods are designed to reduce power consumption while still meeting the requirement of significantly increasing the acceleration voltage of the lead-out area.

[0044] Furthermore, such as Figure 5a The H provided in the embodiments of the present invention + 2. The schematic diagram of the peeling membrane lead-out system shows that the H... + The 2 stripping membrane extraction system 5 has 2 extraction points. The first extraction point is equipped with a stripping target 1, and the second extraction point is equipped with a stripping target 2. The stripping target 1 is used to extract the protons extracted in one loop, and the stripping target 2 is used to extract the protons extracted in two loops.

[0045] Furthermore, such as Figure 5a The H provided in the embodiments of the present invention + 2. As shown in the schematic diagram of the stripping membrane extraction system, the extracted protons in one loop have an extraction energy range of 260-300 MeV, and the azimuth angle of the extraction point ranges from 21.5° to 28.4°.

[0046] Furthermore, such as Figure 5a The H provided in the embodiments of the present invention +2. As shown in the schematic diagram of the stripping membrane extraction system, the protons extracted by the two rings have an extraction energy range of 200-245 MeV, and the azimuth angle of the extraction point ranges from 189° to 196°.

[0047] Supplementary Note 2:

[0048] 1) The two lead-out points are as follows Figure 5a As shown, point 1 and point 2 are the positions of peeling target 1 and peeling target 2, respectively;

[0049] 2) The position of stripping target 1 is where protons with relatively high energy are stripped, and the position of stripping target 2 is where protons with relatively low energy are stripped. The positions of stripping target 1 and stripping target 2 are calculated, and the energy of the protons stripped at different positions is different.

[0050] 3) Protons with relatively high energy are extracted in one loop, and protons with relatively low energy are extracted in two loops; particles that require more than three loops to be extracted are not considered for extraction.

[0051] Furthermore, such as Figure 4 The embodiments of the present invention provided 12 C 6+ As shown in the schematic diagram of the ion deflection plate extraction system, the dual deflection plates are arranged sequentially along the direction of particle extraction, with a first electrostatic deflection plate 4-2-1 and a second electrostatic deflection plate 4-2-2. A first set ring spacing is obtained through the first electrostatic deflection plate 4-2-1 with a voltage of 100kV / cm, and a second set ring spacing is obtained through the second electrostatic deflection plate 4-2-2 with a voltage of 100kV / cm.

[0052] Supplementary Note 3

[0053] 1) Because carbon ions are relatively heavy, the energy they gain from acceleration is also relatively large. Therefore, a very large force is required to deflect them. If this force is provided entirely by an electrostatic deflector, then the deflector plate would need to provide a very high voltage, which is difficult to achieve in engineering. Therefore, it is necessary to decompose it into two deflector plates, so that the pressure on each plate will be smaller.

[0054] 2) The electric field of the first deflector plate is large and the electric field of the second deflector plate is small because the first electrostatic deflector plate needs to provide a large enough voltage to vibrate the carbon ions out; the second deflector plate only needs to stabilize the vibrated carbon ions before leading them out. In this way, the voltage of the second deflector plate will be slightly lower.

[0055] 3) The first electrostatic deflector plate, with its high voltage and strong electric field, plays a primary role in dislodging carbon ions from their dense coils. The second electrostatic deflector plate plays a relatively auxiliary role, further increasing the spacing between the dislodged carbon ions. However, it doesn't need to provide the same voltage as the first electrostatic deflector plate. A higher voltage increases the beam envelope, which has negative side effects, such as poor beam quality. Therefore, the second electrostatic deflector plate doesn't need to provide the same voltage as the first.

[0056] Furthermore, such as Figure 4 The embodiments of the present invention provided 12 C 6+ Schematic diagram of ion deflection plate extraction system, such as Figure 5a The H provided in the embodiments of the present invention + 2. As shown in the schematic diagram of the stripping membrane lead-out system, the number of multiple magnetic channels arranged behind the double deflection plate includes, but is not limited to, 5, and each magnetic channel is composed of a secondary magnet.

[0057] Furthermore, such as Figure 4 The embodiments of the present invention provided 12 C 6+ Schematic diagram of ion deflection plate extraction system, such as Figure 5a The H provided in the embodiments of the present invention + As shown in the schematic diagram of the stripping membrane lead-out system, the distance between the first two magnetic channels is relatively large, and they are evenly distributed outside the peak region of the first magnetic pole after the second electrostatic deflection plate; the distance between the latter three magnetic channels is relatively small, and they are evenly distributed outside the high-frequency cavity near the front end of the lead-out port.

[0058] Furthermore, such as Figure 3 As shown in the high acceleration gradient high Q value high frequency cavity provided in the embodiment of the present invention, the four inner rods of the spiral high frequency cavity 3 are all 62cm high, the two thicker inner rods in the middle are about 25cm in diameter, and the inner rods at both ends are about 15cm in diameter.

[0059] Furthermore, a first set coil spacing of approximately 15 mm is obtained by using a first electrostatic deflection plate with a voltage of 100 kV / cm, and a second set coil spacing of approximately 11 mm is obtained by using a second electrostatic deflection plate with a voltage of 75 kV / cm.

[0060] Furthermore, the perturbation coil is used to generate a first harmonic magnetic field before the particles enter the deflection plate, thereby increasing the deflection radius of the carbon ions by approximately 9.5 mm.

[0061] The design process and various components of the high-frequency cavity provided in the embodiments of the present invention have been described in detail above. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of the present invention; furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention. Any equivalent structural or procedural transformations made using the content of this specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A method to accelerate H + 2 and 12 C 6+ The high-gain superconducting cyclotron accelerator for ions includes a dual ion source system (1) installed on both sides below the accelerator, an injection line transport system (2) installed below the accelerator and shared by the dual ion source systems (1), a spiral high-frequency cavity (3) system for accelerating particles installed on the upper and lower sides of the accelerator center plane and between the magnetic poles, and an electrostatic deflection plate outlet installed on the accelerator center plane. 12 C 6+ The ion deflection plate extraction system (4), and the H-type stripping outlet installed on the central plane of the accelerator. + 2. Peel-off membrane extraction system (5). Its features are: The spiral high-frequency cavity (3) system uses four inner rods as inner conductors to significantly increase the accelerating voltage in the extraction region; 12 C 6+ The ion deflection plate extraction system (4) is equipped with a double deflection plate, a perturbation coil placed in front of the double deflection plate, and multiple magnetic channels placed behind the double deflection plate; the perturbation coil is used to generate a first harmonic magnetic field before the particles enter the deflection plate, so as to increase the deflection radius of the carbon ions; the double deflection plate is used to increase the deflection force when the particles are deflected; the multiple magnetic channels are used to increase the focusing force on the particles after they are deflected by the deflection plate and further constrain the particle trajectory; the H + 2. The stripping membrane extraction system (5) is equipped with a double stripping target arranged symmetrically at approximately 180 degrees, which is used to extract protons of different energy ranges at the same time.

2. The method for accelerating H according to claim 1 + 2 and 12 C 6+ A high-gain superconducting cyclotron accelerator for ions, characterized in that: The H mentioned + 2. The stripping membrane extraction system (5) has two extraction points. The first extraction point is equipped with a stripping target 1 and the second extraction point is equipped with a stripping target 2. The stripping target 1 is used to extract the protons extracted in one round and the stripping target 2 is used to extract the protons extracted in two rounds.

3. The method for accelerating H according to claim 2 + 2 and 12 C 6+ A high-gain superconducting cyclotron accelerator for ions, characterized in that: The protons extracted in the first loop have an extraction energy range of 260-300 MeV, and the azimuth angle of the extraction point ranges from 21.5° to 28.4°.

4. The method for accelerating H according to claim 2 + 2 and 12 C 6+ A high-gain superconducting cyclotron accelerator for ions, characterized in that: The protons extracted by the second loop have an extraction energy range of 200-245 MeV, and the azimuth angle of the extraction point ranges from 189° to 196°.

5. The method for accelerating H according to claim 1 + 2 and 12 C 6+ A high-gain superconducting cyclotron accelerator for ions, characterized in that: The dual deflection plates are arranged in sequence along the direction of particle extraction, with a first electrostatic deflection plate and a second electrostatic deflection plate. A first predetermined loop spacing is obtained through the first electrostatic deflection plate with a voltage of 100 kV / cm, and a second predetermined loop spacing is obtained through the second electrostatic deflection plate with a voltage of 75 kV / cm.

6. The method for accelerating H according to claim 1 + 2 and 12 C 6+ A high-gain superconducting cyclotron accelerator for ions, characterized in that: The number of magnetic channels arranged behind the double deflection plate is 5, and each magnetic channel is composed of a secondary magnet.

7. The method for accelerating H according to claim 6 + 2 and 12 C 6+ A high-gain superconducting cyclotron accelerator for ions, characterized in that: The first two magnetic channels are relatively far apart and are evenly distributed outside the peak region of the first magnetic pole after the second electrostatic deflection plate; the last three magnetic channels are relatively far apart and are evenly distributed outside the high-frequency cavity near the front end of the outlet.

8. The method for accelerating H according to claim 1 + 2 and 12 C 6+ A high-gain superconducting cyclotron accelerator for ions, characterized in that: The spiral high-frequency cavity (3) has four inner rods, each 62 cm high. The two thicker inner rods in the middle have a diameter of 25 cm, and the thinner inner rods at both ends have a diameter of 15 cm.

9. The method for accelerating H according to claim 5 + 2 and 12 C 6+ A high-gain superconducting cyclotron accelerator for ions, characterized in that: The first set ring spacing of 15 mm is obtained by using a first electrostatic deflection plate with a voltage of 100 kV / cm, and the second set ring spacing of 11 mm is obtained by using a second electrostatic deflection plate with a voltage of 75 kV / cm.

10. The H-accelerator according to claim 5 + 2 and 12 C 6+ A high-gain superconducting cyclotron accelerator for ions, characterized in that: The perturbation coil is used to generate a first harmonic magnetic field before the particles enter the deflection plate, thereby increasing the deflection radius of the carbon ions by 9.5 mm.

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