A magnet structure for a superconducting cyclotron accelerator

Abstract

This invention relates to the field of accelerator magnet technology and discloses a magnet structure for a superconducting cyclotron accelerator, including a magnetic support base and a main magnet fixed on the magnetic support base. The main magnet has magnetic pole slots formed at the edges of its magnetic poles along a predetermined beam extraction trajectory. The cross-section of the magnetic pole slots is a U-shaped structure extending along the beam trajectory direction. Support shells are provided on the outer sides of the magnet and the magnetic support base. This invention, by forming magnetic pole slots of a specific shape at the edges of the main magnet's magnetic poles, not only effectively excites coherent radial oscillations of the beam, improving beam extraction efficiency, but also enables rapid beam focusing, improving beam quality. It reduces the number of magnetic channels to two. Simultaneously, it incorporates a shock-absorbing component and a support measuring element, utilizing hydraulic damping and spring buffering mechanisms to provide shock and vibration protection for the magnet structure. Furthermore, the multi-point adjustable positioning function of the support measuring element improves the convenience and flexibility of magnetic field measurement and reduces space waste.

Description

Technical Field

[0001] This invention relates to the field of accelerator magnet technology, and more specifically to a magnet structure for a superconducting cyclotron accelerator. Background Technology

[0002] A superconducting cyclotron is a magnetic structure used to generate, maintain, and accelerate the motion of an electron beam. The design and performance of the magnetic structure are directly related to the accelerator's operational stability, beam extraction efficiency, and overall safety. Traditional superconducting cyclotron magnetic structures typically include basic components such as a main magnet, a magnetic support base, and a support shell, and utilize magnetic channels to extract the beam.

[0003] In the process of beam extraction, external magnetic channels or compensation coils are usually used, which is relatively complex. Especially in the beam extraction region, the defocusing effect of the natural edge field needs to be counteracted by focusing elements, which increases the complexity. Furthermore, the magnet structure may be subjected to external impacts during operation, which may cause adverse reactions in the magnet and affect the operation and safety of the accelerator. Summary of the Invention

[0004] This invention provides a magnet structure for a superconducting cyclotron accelerator, which enables efficient beam extraction and radial focusing while possessing excellent shock absorption and buffering capabilities, and allows for flexible and convenient multi-point magnetic field strength measurement before operation.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] In a first aspect, a magnet structure for a superconducting cyclotron accelerator includes a magnetic support base and a main magnet fixed on the magnetic support base. The main magnet has magnetic pole slots formed at the edges of its magnetic poles along a predetermined beam extraction trajectory. The cross-section of the magnetic pole slots is a U-shaped structure extending along the beam trajectory direction. A support shell is provided on the outer sides of the magnet and the magnetic support base. The structure also includes:

[0007] The shock-absorbing part is centrally symmetrically and evenly arranged on the outside of the support shell. The shock-absorbing part includes a buffer member centrally symmetrically fixed on the outside of the support shell, and a connecting member arranged on the side of the shock-absorbing part away from the support shell, so as to protect the support shell and provide shock absorption.

[0008] The support and measuring component is housed within the vibration protection section. The support and measuring component includes a support connecting member disposed inside the connecting member and penetrating the outer side and upper end of the connecting member, as well as an adjusting member disposed on the support connecting member. The adjusting member can cooperate with the buffer member to position the support connecting member, thereby adjusting the position of the magnetometer and supporting it to measure the magnetic field strength of the main magnet at multiple points.

[0009] The main magnet includes:

[0010] The magnets are multiple and arranged in a centrally symmetrical spiral pattern on the magnetic support base;

[0011] The magnetic pole slot includes:

[0012] The end slot is located above the end of the magnet that is furthest from the center of the magnetic support base;

[0013] The U-shaped groove is formed on the magnet, and one end of it is connected to the end groove.

[0014] The rear groove is formed on the magnet, with one end connected to the end of the U-groove away from the end groove, and the other end passing through the magnet;

[0015] The bottoms of the U-groove and the rear groove are gradually raised in a stepped manner.

[0016] Furthermore, the buffer includes:

[0017] Multiple arc-shaped columns are fixed to the side of the solid plate away from the supporting shell.

[0018] The fixed plate is symmetrically fixed on the outside of the arc column and is fixedly connected to the support shell;

[0019] The inner cavity is arc-shaped and located inside the arc-shaped column;

[0020] The bypass cavity is arc-shaped and located inside the arc column, adjacent to the inner cavity;

[0021] Throttling cavities are symmetrically located inside the arc column to connect the bypass cavity and the inner cavity;

[0022] The push-connecting parts are set through the arc column and are located in the inner cavity and bypass cavity.

[0023] Furthermore, the push-connecting component includes:

[0024] The first piston is located on the inner side of the inner cavity and fits against the arc column;

[0025] The second piston is located inside the bypass cavity and fits against the arc column;

[0026] The push rod is symmetrically fixed at one end to the end of the first piston and passes through the end of the arc column;

[0027] A rubber sleeve is fixedly installed through the arc column and wraps around the outside of the push rod.

[0028] Furthermore, the connecting member includes:

[0029] The damper is located on the arc column away from the support shell;

[0030] The arc connecting rod is symmetrically fixed at one end to the outside of the damper, and the other end is connected to the other end of the push rod.

[0031] The spring is fitted onto the outside of the damper;

[0032] A shielding plate is fixed to the end of the damper away from the arc column to protect the support shell.

[0033] Furthermore, the support member includes:

[0034] A groove is formed at the upper end of the shielding plate;

[0035] The guide groove is located on the side of the shielding plate away from the support shell and is connected to the groove.

[0036] The shift support component is movably positioned inside the groove.

[0037] Furthermore, the shift support component includes:

[0038] The lifting rod is movably positioned inside the groove;

[0039] The slider is fixed to the outside of the lifting rod and extends through the guide groove to the outside of the shielding plate;

[0040] The support plate is located on the outside of the telescopic end of the lifting rod and is housed in the groove.

[0041] Furthermore, the setting component includes:

[0042] Guide grooves are symmetrically opened through the support plate;

[0043] The sliding plate is rotated by bearings and is symmetrically positioned on the outside of the telescopic end of the lifting rod, and is located in the guide groove;

[0044] The rubber sleeve is fixedly installed through the support plate and located away from the lifting rod;

[0045] Insert the fixed parts and move them through the support plate.

[0046] Furthermore, the insertion component includes:

[0047] A through groove is formed through the support plate and is connected to the guide groove;

[0048] Telescopic rod, with a movable design that runs through the slot;

[0049] The support plate is fixed to the outside of the fixed end of the telescopic rod and is located on the support plate;

[0050] The screw insert is rotatably mounted on the telescopic end of the telescopic rod.

[0051] Furthermore, the rotary insert component includes:

[0052] The support plate is rotatably connected to the telescopic end of the telescopic rod;

[0053] A shovel-shaped plate is fixed below the support plate;

[0054] The lower end of the shovel-shaped plate can be inserted into the gap between the arc column and the fixed plate.

[0055] The above-described solution of the present invention has at least the following beneficial effects:

[0056] By creating magnetic pole slots of a specific shape at the edge of the main magnet's poles, not only can coherent radial oscillation of the beam be effectively excited, improving beam extraction efficiency, but the beam can also be quickly focused, improving beam quality. This reduces the number of magnetic channels to two (the first magnetic channel and the second magnetic channel). Simultaneously, by setting up a shock-absorbing part and a support component, and utilizing hydraulic damping and spring buffering mechanisms, the magnet structure is provided with shock-resistant and vibration-damping protection. Furthermore, the multi-point adjustment and positioning function of the support component improves the convenience and flexibility of magnetic field measurement and reduces space waste. Attached Figure Description

[0057] Figure 1 A three-dimensional view of the magnet structure for a superconducting cyclotron accelerator provided in an embodiment of the present invention;

[0058] Figure 2 This is a top plan view of the magnet structure for a superconducting cyclotron accelerator provided in an embodiment of the present invention;

[0059] Figure 3 A perspective view of the magnetic pole slot provided in an embodiment of the present invention;

[0060] Figure 4 A cross-sectional view of the arc-shaped column provided in an embodiment of the present invention;

[0061] Figure 5 Provided for embodiments of the present invention Figure 1 Schematic diagram of the structure at point A in the diagram;

[0062] Figure 6 A schematic diagram of the planar structure of the shielding plate and arc column combination provided in an embodiment of the present invention;

[0063] Figure 7 A perspective view of the combination of support plate, lifting rod and telescopic rod provided in an embodiment of the present invention;

[0064] Figure 8 A cross-sectional view of the rubber clip provided in an embodiment of the present invention;

[0065] Figure 9 Provided for embodiments of the present invention Figure 6 Schematic diagram of the structure at point B in the diagram;

[0066] Figure 10 Provided for embodiments of the present invention Figure 6 Schematic diagram of the structure at point C;

[0067] Figure 11 The curves showing the change of magnetic field with radius under a traditional magnetic pole structure;

[0068] Figure 12 The curve showing the change of magnetic field with radius under the magnetic pole structure provided in the embodiment of the present invention.

[0069] Explanation of reference numerals in the attached figures:

[0070] In the diagram: 1. Support shell; 2. Through slot; 3. Positioning slot; 4. Through port; 5. Magnetic support base; 6. Magnet; 7. Beam track; 8. End slot; 9. U-groove; 10. Rear slot; 11. First magnetic channel; 12. Second magnetic channel; 13. Fixed plate; 14. Arc column; 15. Inner cavity; 16. Bypass cavity; 17. Throttling cavity; 18. First piston; 19. Second piston; 20. Push rod; 21. Arc connecting rod; 22. Damper; 23. Shielding plate; 24. Groove; 25. Guide groove; 26. Lifting rod; 27. Slider; 28. Support plate; 29. ​​Guide groove; 30. Slide plate; 31. Rubber sleeve; 32. Fixed hole; 33. Through groove; 34. Telescopic rod; 35. Support plate; 36. Support plate; 37. Shovel-shaped plate; 38. Rubber sleeve; 39. Spring. Detailed Implementation

[0071] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0072] like Figures 1 to 12 As shown, an embodiment of the present invention provides a magnet structure for a superconducting cyclotron accelerator, including a magnetic support base 5 and a main magnet 6 fixed on the magnetic support base 5. The main magnet 6 has magnetic pole slots formed at the edges of its magnetic poles along a predetermined beam extraction trajectory. The cross-section of the magnetic pole slots is a U-shaped structure extending along the beam trajectory direction. A support shell 1 is provided on the outer side of the magnet 6 and the magnetic support base 5. The invention also includes:

[0073] The shock-absorbing part is centrally symmetrically and evenly arranged on the outside of the support shell 1. The shock-absorbing part includes a buffer member centrally symmetrically fixed on the outside of the support shell 1, and a connecting member arranged on the side of the shock-absorbing part away from the support shell 1, so as to protect the support shell 1 and provide shock absorption and cushioning.

[0074] The support and measuring component is housed inside the vibration protection section. The support and measuring component includes a support connecting member disposed inside the connecting member and penetrating the outer side and upper end of the connecting member, as well as an adjusting member disposed on the support connecting member. The adjusting member can cooperate with the buffer to position the support connecting member, so as to adjust the position of the magnetometer and support its multi-point measurement of the magnetic field strength of the main magnet 6.

[0075] The main magnet 6 includes:

[0076] Magnets 6, in multiple form, are distributed in a centrally symmetrical spiral shape on the magnetic support base 5;

[0077] Magnetic pole slots include:

[0078] The end slot 8 is located above the end of the magnet 6 that is away from the center of the magnetic support 5;

[0079] U-groove 9 is formed on magnet 6, and one end is connected to end groove 8;

[0080] The rear groove 10 is formed on the magnet 6, with one end connected to the end of the U-groove 9 away from the end groove 8, and the other end passing through the magnet 6;

[0081] The bottoms of U-groove 9 and rear groove 10 are set in a stepped manner, gradually rising.

[0082] Specifically, the support shell 1 has multiple through slots 2 for the adjustment mechanism of the electrostatic deflection plate to pass through and be installed. The support shell 1 has symmetrically arranged positioning slots 3 for the upper cover of the superconducting cyclotron to be positioned and installed. The support shell 1 has through openings 4, which are symmetrically arranged to provide a beam discharge channel. The support shell 1 can provide stable support for the magnetic support base 5, which can support the magnet 6. The magnetic support base 5 and the magnet 6 form a beam track 7 with the support shell 1.

[0083] In this embodiment, the geometric dimensions and specific shape of the magnetic pole slot are optimized and determined through numerical simulation. Specific optimization objectives include the radial distribution of the magnetic field, the radial oscillation frequency and crossing rate, and the radial focusing effect. The magnetic pole slot is directly machined into the edge portion of the ferromagnetic fan-shaped magnetic pole constituting the main magnetic field. The depth, width, length, and specific contour of the magnetic pole slot (e.g., the arm length of a U-shape, the bottom shape, etc.) are optimized through electromagnetic simulation calculations based on specific beam energy, extraction radius, and required magnetic field gradient parameters.

[0084] The introduction of the magnetic pole slots causes the effective magnetic induction intensity Bz to decrease faster than the edge field of the unslotted area in the initial stage when the beam trajectory enters the groove 24 region. This rapid decrease in magnetic field can cause the radial oscillation frequency Qr to change rapidly. For example, in the precession extraction scheme, it helps Qr to quickly cross integer resonances such as Qr=1, thereby effectively exciting the coherent radial oscillation of the beam, increasing the inter-loop spacing, and improving the beam extraction efficiency.

[0085] The gradually rising design of the inner bottom walls of the rear section 10 and U-section 9 causes the magnetic induction intensity Bz in this region to increase with the increase of the radius, i.e. ,in The meaning of Bz is the axial component of the magnetic induction intensity, which refers to the magnetic field intensity component perpendicular to the magnetic pole plane of the magnet (i.e., along the accelerator axis). It is a key magnetic field component that determines the beam trajectory and focusing effect. In a superconducting cyclotron accelerator, the distribution of Bz directly affects the deflection radius, rotation frequency and stability of the beam. In this invention, the radial variation trend of Bz is controlled by the stepped structure design of the magnetic pole slots (U slot 9, rear slot 10) to achieve beam focusing. The meaning of r is radial coordinate, which represents the distance coordinate from the center of the magnetic support to the edge of the magnetic pole in the horizontal direction. It represents the radial position of the beam moving in the accelerator. The beam is accelerated from the center of the magnet outward. The value of r increases with the increase of beam energy. The range of r in the formula corresponds to the movement path of the beam from U slot 9 to the rear slot 10, that is, r from about 700mm to 820mm (refer to the radial coordinate range in Figure 12). The meaning is the radial gradient of the axial component of the magnetic induction intensity, representing the rate of change of Bz with radial position r, reflecting the steepness of the radial change of the magnetic field. When This means that as the radial position r of the beam increases (the beam moves outward), the axial magnetic induction intensity Bz also increases, forming a radially increasing magnetic field distribution. This distribution generates a radial focusing force on the charged beam pointing towards the center of the magnet, counteracting the defocusing effect of the natural edge field and ensuring stable beam movement. The bottoms of U-groove 9 and the rear groove 10 gradually rise in a stepped manner, causing the thickness of the ferromagnetic material in the groove to increase radially. According to the principle of electromagnetic induction, the increase in the thickness of the ferromagnetic material will enhance Bz, thereby achieving... The magnetic field distribution; when the beam passes through the magnetic pole slot region. The generated radial focusing force can correct the trajectory deviation of the beam caused by defocusing of the natural edge field, improve beam quality, and lay the foundation for the subsequent extraction of the beam through the first magnetic channel 11 and the second magnetic channel 12. By comparing Figure 11 (conventional magnetic pole structure with radial defocus) and Figure 12 (magnetic pole structure of the present invention, achieving radial focusing), the optimization effect of the magnetic field distribution corresponding to this formula can be intuitively observed. This corresponds to a positive magnetic field exponent > 0, thereby generating a radial focusing force on the beam passing through this point. This focusing effect follows the electrostatic deflection plate and directly compensates for and overcomes the defocusing effect of the natural edge field.

[0086] By directly forming a channel with a specific magnetic field distribution on the magnet 6, the magnet 6 itself integrates the function of a traditional external magnetic channel, thereby reducing the number of magnetic channels to two (the first magnetic channel 11 and the second magnetic channel 12), reducing the number of magnetic channels, and achieving a highly compact and integrated extraction focusing system.

[0087] In a preferred embodiment of the present invention, the buffer includes:

[0088] Multiple arc columns 14 are fixed to the side of the fixed plate 13 away from the support shell 1;

[0089] Fixed plate 13 is symmetrically fixed on the outside of arc column 14 and fixedly connected to support shell 1;

[0090] The inner cavity 15 is arc-shaped and opened inside the arc column 14;

[0091] The bypass cavity 16 is arc-shaped and located inside the arc column 14, and is adjacent to the inner cavity 15;

[0092] Throttling cavity 17 is symmetrically opened inside arc column 14 to connect bypass cavity 16 and inner cavity 15;

[0093] The push-connecting part is provided through the arc column 14 and is located in the inner cavity 15 and the bypass cavity 16;

[0094] Specifically, the support shell 1 provides stable support for the fixed plate 13, the fixed plate 13 provides stable support for the arc column 14, the arc column 14 provides opening space for the inner cavity 15, the bypass cavity 16 and the throttling cavity 17, the inner cavity 15 provides movement space for the first piston 18, the bypass cavity 16 provides movement space for the second piston 19, and the inner cavity 15, the bypass cavity 16 and the throttling cavity 17 are filled with hydraulic oil. The throttling cavity 17 can slow down the flow rate of the hydraulic oil to provide damping.

[0095] The push-connecting parts include:

[0096] The first piston 18 is located inside the inner cavity 15 and is in contact with the arc column 14;

[0097] The second piston 19 is located inside the bypass cavity 16 and is in contact with the arc column 14;

[0098] The push rod 20 is symmetrically fixed at one end to the end of the first piston 18 and passes through the end of the arc column 14;

[0099] The rubber sleeve 38 is fixedly installed through the arc column 14 and wraps around the outside of the push rod 20.

[0100] Specifically, the first piston 18 can fit into the inner cavity 15 to provide a seal, and can be pushed along the inner cavity 15 under the action of external force. The second piston 19 can fit into the bypass cavity 16 to provide a seal, and can be pushed along the bypass cavity 16 under the action of external force. The first piston 18 can push hydraulic oil under the action of external force, so that the hydraulic oil can push the second piston 19. The arc column 14 can stably support the rubber sleeve 38. The rubber sleeve 38 can provide a through channel and support for the push rod 20, and can also provide a seal. When the push rod 20 is pushed by external force, it will push the rubber sleeve 38 to deform slightly, so that the push rod 20 can move under the support of the rubber sleeve 38.

[0101] The connecting components include:

[0102] The damper 22 is located on the arc column 14 away from the support shell 1;

[0103] Arc connecting rod 21, one end is symmetrically fixed to the outside of damper 22, and the other end is connected to the other end of push rod 20;

[0104] Spring 39 is sleeved on the outside of damper 22;

[0105] The shielding plate 23 is fixed to the end of the damper 22 away from the arc column 14 to protect the support shell 1.

[0106] Specifically, the damper 22 can contract under the action of external force and can provide positioning support for the spring 39. The spring 39 and the damper 22 work together to play a shock absorption role. The push rod 20 can provide support for the arc connecting rod 21, so that the arc connecting rod 21 can stably support the damper 22, and the damper 22 can provide support for the shielding plate 23. The shielding plate 23 can shield the magnetic field, prevent the external magnetic field from affecting the operation of the magnet 6, and prevent the magnetic field of the magnet 6 from affecting external objects.

[0107] In practical application, when an external object impacts the support shell 1, it first contacts the shielding plate 23, causing the shielding plate 23 to be stressed and transmit the force to the spring 39 and damper 22. This causes the spring 39 and damper 22 to contract, allowing the shielding plate 23 to be pushed closer to the support shell 1 by the external force. The damper 22 and spring 39 then work together to buffer the external force. When an external object tilts and impacts the support shell 1, it similarly contacts the shielding plate 23, causing the shielding plate 23 to work with the spring 39 and damper 22 to buffer the external force. Simultaneously, the damper 22, under the influence of the external force, transmits the force to the push rod 20, allowing the push rod 20 to... Under the action of external force, the arc connecting rod 21 is pushed to move inside the inner cavity 15. This allows the arc connecting rod 21 to push the first piston 18 to move within the inner cavity 15. Consequently, the first piston 18 can use external force to squeeze the hydraulic oil, allowing the hydraulic oil to flow through the throttle valve into the bypass cavity 16. This, in turn, pushes the hydraulic oil in the bypass cavity 16 to squeeze the second piston 19, causing the second piston 19 to move within the bypass cavity 16. This dissipates the external force, achieving a shock absorption and buffering effect, reducing the impact vibration transmitted to the support shell 1, preventing external impacts, and avoiding displacement of the magnet 6 due to collision vibration of the magnet structure, which could damage the insulation layer or cause local overheating, thus improving safety.

[0108] In a preferred embodiment of the present invention, the support member includes:

[0109] The groove 24 is formed at the upper end of the shielding plate 23;

[0110] The guide groove 25 is formed on the side of the shielding plate 23 away from the support shell 1 and communicates with the groove 24;

[0111] The shift support component is movably positioned inside the groove 24.

[0112] Specifically, the shielding plate 23 can provide space for the groove 24 and the guide groove 25, and the groove 24 can provide storage space for the moving support parts.

[0113] The shift support components include:

[0114] The lifting rod 26 is movably set inside the groove 24;

[0115] The slider 27 is fixed to the outside of the lifting rod 26 and extends through the guide groove 25 to the outside of the shielding plate 23;

[0116] The support plate 28 is located on the outside of the telescopic end of the lifting rod 26 and is housed in the groove 24.

[0117] Specifically, the groove 24 provides space for the lifting rod 26 to move, the lifting rod 26 provides support for the slider 27, the slider 27 cooperates with the guide groove 25 to provide a guiding function for the lifting rod 26 to move, and the support plate 28 can be stored in the groove 24.

[0118] The setting components include:

[0119] Guide groove 29, symmetrically opened through support plate 28;

[0120] The slide plate 30 is rotated by bearings and is symmetrically arranged on the outside of the telescopic end of the lifting rod 26, and is located in the guide groove 29;

[0121] The rubber sleeve 31 is fixedly installed through the support plate 28 and is located away from the lifting rod 26;

[0122] Insert the fixed parts and move them through the support plate 28.

[0123] Specifically, the support plate 28 provides space for the guide groove 29, which in turn provides space for the sliding plate 30 to move and guide. The sliding plate 30 and the slider 27 are L-shaped. The sliding plate 30 provides support for the support plate 28, which can use external force to drive the sliding plate 30 to rotate under the support of the lifting rod 26. The support plate 28 provides support for the rubber sleeve 31, whose inner diameter gradually decreases from top to bottom and has a certain elasticity. It can use elastic clamping to position the magnetometer. The support plate 28 has multiple fixing holes 32 through it, and the fixing holes 32 are located on the outside of the rubber sleeve 31 for fixing components to connect and fix the magnetometer.

[0124] Insertion parts include:

[0125] The through groove 33 is opened through the support plate 28 and is connected to the guide groove 29;

[0126] Telescopic rod 34, through slot 33, is movable;

[0127] Support plate 35 is fixed to the outside of the fixed end of telescopic rod 34 and is located on support plate 28;

[0128] The screw insert is rotatably mounted on the telescopic end of the telescopic rod 34.

[0129] Specifically, the support plate 28 can provide space for the through slot 33, the through slot 33 can provide space for the telescopic end of the lifting rod 26 to move, and can also provide space for the telescopic rod 34 to move. The telescopic rod 34 can provide support for the support plate 35, and the support plate 35 can provide support for the telescopic rod 34 under the support of the support plate 28.

[0130] The screw-in part includes:

[0131] Support plate 36 is rotatably connected to the telescopic end of telescopic rod 34;

[0132] The shovel-shaped plate 37 is fixed below the support plate 36;

[0133] The lower end of the shovel-shaped plate 37 can be inserted into the gap between the arc column 14 and the fixed plate 13.

[0134] In practical application, the telescopic rod 34 can provide rotational support for the support plate 36, and the support plate 36 can stably support the shovel-shaped plate 37. The lower end of the shovel-shaped plate 37 has a curved angle, which can be matched with the gap between the arc column 14 and the fixed plate 13.

[0135] Before using the magnet structure after installation, the operator needs to extend the lifting rod 26, so that the lifting rod 26, supported by the shielding plate 23, pushes the sliding plate 30 upward using its telescopic end. The sliding plate 30 then pushes the support plate 28 upward using external force, allowing the support plate 28 to move the telescopic rod 34 upward from the inside of the groove 24 via the support plate 35. Next, the operator needs to insert the magnetometer into the inside of the rubber sleeve 31 and push it downward, so that the magnetometer's detection end passes through the rubber sleeve 31 and moves below it. Then, depending on the actual situation, the magnetometer is fixed through the fixing hole 32 using fixing components. Subsequently, the operator needs to push the support plate 28, so that under the action of external force, it pushes the sliding plate 30 together, supported by the lifting rod 26, to rotate around the bearing. This allows the support plate 28 to rotate the magnetometer above the magnet 6. Simultaneously, the operator can push and pull the support plate 28 as needed, allowing it to move back and forth using the guide groove 29 supported by the sliding plate 30. The operator can also simultaneously push the lifting rod 26... 6. The lifting rod 26 can be moved horizontally along the guide groove 25 using the slider 27. During the horizontal movement, the lifting rod 26 will also move the support plate 28. This allows for easy adjustment of the position of the magnetometer on the support plate 28 to a suitable measurement point. Then, under the support of the support plate 35, the telescopic rod 34 is pushed to slide along the through groove 33. The telescopic rod 34 can move the shovel-shaped plate 37 along with the support plate 36. As needed, the shovel-shaped plate 37 can be pushed upwards, causing the telescopic rod 34 to retract via the support plate 36. This movement allows the shovel-shaped plate 37 to be moved above the appropriate gap between the fixed plate 13 and the arc column 14. Then, the shovel-shaped plate 37 is lowered and its angle is adjusted by rotating it under the support of the support plate 36, causing the telescopic rod 34 to extend. This allows the shovel-shaped plate 37 to be inserted into the gap between the fixed plate 13 and the arc column 14 at the corresponding position for positioning, preventing the support plate 28 from rotating. This allows for convenient measurement of the magnetic field strength at multiple points in the effective aperture of the magnet 6 (particle motion area) using the magnetometer.

[0136] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A magnet structure for a superconducting cyclotron accelerator, characterized in that, The system includes a magnetic support base and a main magnet fixed on the magnetic support base. The main magnet has magnetic pole slots formed at the edges of its magnetic poles along a predetermined beam extraction trajectory. The cross-section of the magnetic pole slots is a U-shaped structure extending along the beam trajectory direction. A support shell is provided on the outer side of the magnet and the magnetic support base. The system also includes: The shock-absorbing part is centrally symmetrically and evenly arranged on the outside of the support shell. The shock-absorbing part includes a buffer member centrally symmetrically fixed on the outside of the support shell, and a connecting member arranged on the side of the shock-absorbing part away from the support shell, so as to protect the support shell and provide shock absorption. The support and measuring component is housed inside the vibration protection section. The support and measuring component includes a support connecting member disposed inside the connecting member and penetrating the outer side and upper end of the connecting member, as well as an adjusting member disposed on the support connecting member. The adjusting member can cooperate with the buffer to position the support connecting member, so as to adjust the position of the magnetometer and support it to measure the magnetic field strength of the main magnet at multiple points. The main magnet includes: The magnets are multiple and arranged in a centrally symmetrical spiral pattern on the magnetic support base; The magnetic pole slot includes: The end slot is located above the end of the magnet that is furthest from the center of the magnetic support base; The U-shaped groove is formed on the magnet, and one end of it is connected to the end groove. The rear groove is formed on the magnet, with one end connected to the end of the U-groove away from the end groove, and the other end passing through the magnet; The bottoms of the U-groove and the rear groove are gradually raised in a stepped manner.

2. The magnet structure for a superconducting cyclotron accelerator according to claim 1, characterized in that, The buffer includes: Multiple arc-shaped columns are fixed to the side of the solid plate away from the supporting shell. The fixed plate is symmetrically fixed on the outside of the arc column and is fixedly connected to the support shell; The inner cavity is curved and opened inside the arc-shaped column; The bypass cavity is arc-shaped and located inside the arc column, adjacent to the inner cavity; Throttling cavities are symmetrically located inside the arc column to connect the bypass cavity and the inner cavity; The inner cavity, bypass cavity, and throttling cavity are filled with hydraulic oil; The push-connecting parts are set through the arc column and are located in the inner cavity and bypass cavity.

3. The magnet structure for a superconducting cyclotron accelerator according to claim 2, characterized in that, The push-connecting component includes: The first piston is located on the inner side of the inner cavity and fits against the arc column; The second piston is located inside the bypass cavity and fits against the arc column; The push rod is symmetrically fixed at one end to the end of the first piston and passes through the end of the arc column; A rubber sleeve is fixedly installed through the arc column and wraps around the outside of the push rod.

4. The magnet structure for a superconducting cyclotron accelerator according to claim 3, characterized in that, The connecting member includes: The damper is located on the arc column away from the support shell; The arc connecting rod is symmetrically fixed at one end to the outside of the damper, and the other end is connected to the other end of the push rod. The spring is fitted onto the outside of the damper; A shielding plate is fixed to the end of the damper away from the arc column to protect the support shell.

5. The magnet structure for a superconducting cyclotron accelerator according to claim 4, characterized in that, The support member includes: A groove is formed at the upper end of the shielding plate; The guide groove is located on the side of the shielding plate away from the support shell and is connected to the groove. The shift support component is movably positioned inside the groove.

6. The magnet structure for a superconducting cyclotron accelerator according to claim 5, characterized in that, The shift support component includes: The lifting rod is movably positioned inside the groove; The slider is fixed to the outside of the lifting rod and extends through the guide groove to the outside of the shielding plate; The support plate is located on the outside of the telescopic end of the lifting rod and is housed in the groove.

7. The magnet structure for a superconducting cyclotron accelerator according to claim 6, characterized in that, The setting component includes: Guide grooves are symmetrically opened through the support plate; The sliding plate is rotated by bearings and is symmetrically positioned on the outside of the telescopic end of the lifting rod, and is located in the guide groove; The rubber sleeve is fixedly installed through the support plate and located away from the lifting rod; Insert the fixed parts and move them through the support plate.

8. The magnet structure for a superconducting cyclotron accelerator according to claim 7, characterized in that, The insertion component includes: A through groove is formed through the support plate and is connected to the guide groove; Telescopic rod, with a movable design that runs through the slot; The support plate is fixed to the outside of the fixed end of the telescopic rod and is located on the support plate; The screw insert is rotatably mounted on the telescopic end of the telescopic rod.

9. The magnet structure for a superconducting cyclotron accelerator according to claim 8, characterized in that, The rotary insert component includes: The support plate is rotatably connected to the telescopic end of the telescopic rod; A shovel-shaped plate is fixed below the support plate; The lower end of the shovel-shaped plate can be inserted into the gap between the arc column and the fixed plate.

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