Rotating scatter target for high-energy proton beam extraction and method of using the same

Abstract

The application discloses a rotary scattering target for high-energy proton beam extraction and a use method thereof. The rotary scattering target comprises a scattering target assembly, the scattering target assembly comprises a rotating disc, an oxygen-free copper connecting rod and a CVD diamond scattering target body, the CVD diamond scattering target body is fixedly connected to the outer periphery of the rotating disc through the oxygen-free copper connecting rod, and the rotating disc drives the oxygen-free copper connecting rod and the CVD diamond scattering target body to rotate at a high speed; and the CVD diamond scattering target body has a trapezoidal sheet structure. The use method is that the rotating disc drives the CVD diamond scattering target body to intermittently extend into a vacuum pipeline to cut the high-energy proton beam and realize the scattering of the high-energy protons; the CVD diamond scattering target body cuts the proton beam once in a rotation period, and the effective cutting time is 1 ms. The application can realize rapid heat conduction, realize the intermittent effective cutting effect on the high-energy proton beam, and effectively reduce the temperature rise of the scattering target and the beam loss of the high-energy proton beam.

Description

Technical Field

[0001] This invention relates to the field of high-energy proton beam experimental terminal technology at the China Spallation Neutron Source, and particularly to a rotating scattering target for extracting high-energy proton beams from a scatterer and its usage method. Background Technology

[0002] The high-energy proton beam experimental terminal based on the China Spallation Neutron Source (CSNS) will provide high-energy proton testing for multiple application fields, including advanced detector development and calibration, irradiation effect research, and proton imaging. It will fill a domestic gap and become the only dedicated high-energy proton testing beam in China.

[0003] The scatterer is a key device for extracting high-energy proton beams. It primarily uses a scattering target to scatter high-energy protons accelerated to 1.6 GeV from the main beam, and then slowly extracts the protons scattered at larger angles through a vacuum tube to provide a weak proton beam for the experimental terminal. During this process, the high-energy protons directly interact with the scattering target, depositing a large amount of energy and causing a sharp increase in the target's temperature. This also results in significant beam loss for the high-energy proton beam, leading to excessively high radiation doses in the vicinity and increasing the difficulty of subsequent maintenance. In practice, to reduce beam loss and energy deposition, the commonly used method is to rotate the scattering target at a high speed of 1500 rpm. Within one cycle, the effective beam-cutting time for the high-energy proton beam is only 1 ms. This effective beam-cutting time allows for the scattering of high-energy protons, after which the scattering target is quickly moved away to avoid continuous interaction with the high-energy proton beam.

[0004] Currently, commonly used scattering target materials are tungsten or graphite. Both tungsten and graphite have high melting points. However, in practice, it has been found that tungsten has a higher atomic number, resulting in higher energy deposition and greater beam loss under the same conditions, making it difficult to meet radiation protection requirements. While graphite has a high melting point and low beam loss, its low mechanical strength makes it difficult to process into slender needle shapes. Even if the required shape can be processed, its service life is a concern under high-speed rotation conditions, coupled with high-temperature thermal shock and high-irradiation environments.

[0005] To address this, invention application CN107227442A discloses an embedded tungsten-diamond transmission target and its preparation method. The method involves drilling holes several micrometers in diameter and depth into a diamond sheet several hundred micrometers thick, and then depositing tungsten into these holes to create a high-quality, heat-dissipating embedded tungsten-diamond transmission target. This target is formed in a single step under vacuum conditions, is less prone to contamination, and possesses advantages such as high X-ray emissivity, good heat dissipation, and long lifespan. However, although the target structure utilizes the strong thermal conductivity of diamond, diamond only serves as a heat-conducting auxiliary component; tungsten remains the primary projection target. When applied to a scatterer, it still suffers from high deposition energy and large beam loss, making it difficult to meet radiation protection requirements. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rotating scattering target for extracting high-energy proton beams from a scatterer. This rotating scattering target can achieve rapid heat conduction and simultaneously achieve intermittent and effective beam cutting of the high-energy proton beam, effectively reducing the temperature rise of the scattering target and the beam loss of the high-energy proton beam.

[0007] Another object of the present invention is to provide a method of using a rotating scattering target for extracting high-energy proton beams from the above-mentioned scatterer.

[0008] The technical solution of this invention is as follows: a rotating scattering target for extracting high-energy proton beams from a scatterer, comprising a scattering target assembly, which includes a turntable, an oxygen-free copper connecting rod, and a CVD diamond scattering target body. The CVD diamond scattering target body is fixedly connected to the outer circumference of the turntable via the oxygen-free copper connecting rod. The turntable drives the oxygen-free copper connecting rod and the CVD diamond scattering target body to rotate at high speed. The CVD diamond scattering target body has a trapezoidal sheet structure. When using this rotating scattering target, the scattering target assembly needs to be placed in a high vacuum environment (vacuum degree ≤10E-6Pa). The turntable rotates at a high speed of 1500 rpm, causing the CVD diamond scattering target body mounted on its outer circumference to intermittently cut the high-energy proton beam, thereby scattering the high-energy protons and obtaining and extracting high-energy protons that meet the scattering angle. During the beam cutting process: First, because high-energy proton beams have very high energy, direct interaction with the scattering target will result in significant beam loss. This application uses a CVD diamond-made scattering target body, which, compared to traditional metal scattering targets (such as tungsten, beryllium, and titanium), can effectively reduce beam loss within the same volume. Second, high-energy protons will deposit a large amount of heat on the scattering target, leading to excessive temperature rise. CVD diamond, with its high melting point, fast thermal conductivity, and good thermal stability, can effectively solve the problem of excessive temperature rise compared to existing graphite scattering targets. Third, combined with the rotating structure of the scattering target, CVD diamond scattering… The interaction between the target body and the proton beam is intermittent rather than continuous, and the actual beam-cutting time is very short, which can further reduce beam loss and temperature rise. Fourth, since the CVD diamond scattering target body in this application is only 0.3 mm thick, it is very easy to break under normal circumstances. In order to fix the CVD diamond scattering target body, it is brazed to one end of the oxygen-free copper connecting rod, and the other end of the oxygen-free copper connecting rod is fixed to the turntable. Through the connection, not only is the CVD diamond scattering target body fixed, but the thermal resistance is also effectively reduced, further improving the thermal conductivity. Fifth, the CVD diamond scattering target body adopts a trapezoidal plate shape, which results in a lower temperature rise at the same beam position compared to the traditional rectangular scattering target.

[0009] The aforementioned rotating scattering target also includes a vacuum chamber and a vacuum chamber cover, forming a scattering target mounting space between the vacuum chamber and the vacuum chamber cover. Vacuum pipes for high-energy proton beam passage are respectively provided on both sides of the vacuum chamber and the vacuum chamber cover. The scattering target mounting space is connected to the space inside the vacuum pipes, forming a sealed vacuum chamber. The scattering target assembly is located within the scattering target mounting space, and as the turntable rotates, the CVD diamond scattering target body intermittently extends into the beam envelope space formed inside the vacuum pipe. A high-vacuum space with a cross-shaped cross-section is formed between the scattering target mounting space and the space inside the vacuum pipe. The scattering target assembly is vertically positioned above the vacuum pipe. The high-energy proton beam passes through the vacuum pipe, and through the high-speed rotation of the scattering target assembly, the CVD diamond scattering target body enters the beam envelope space in each rotation cycle, cutting off the high-energy proton beam and quickly leaving, avoiding continuous interaction with the high-energy proton beam, thereby effectively reducing beam loss and temperature rise.

[0010] The turntable has a rotating shaft at its center. One end of the rotating shaft is connected to the vacuum chamber through a bearing, and the other end of the rotating shaft passes through the vacuum chamber cover and is connected to a motor. The motor is fixedly installed on the outside of the vacuum chamber cover through a motor support. Driven by the motor, the turntable is driven to rotate at high speed through the rotating shaft.

[0011] The rotating shaft is arranged parallel to the vacuum pipe. The distance from the shaft axis to the top of the vacuum pipe is greater than the sum of the radius of the turntable and the length of the oxygen-free copper connecting rod, but less than the sum of the radius of the turntable, the length of the oxygen-free copper connecting rod, and the length of the CVD diamond scattering target body. This ensures that during the beam cutting process, only the CVD diamond scattering target body is in contact with the high-energy proton beam, avoiding interference from the oxygen-free copper connecting rod on the beam cutting process.

[0012] The distance between the axis of the rotating shaft and the axis of the vacuum pipeline is greater than the sum of the lengths of the turntable radius, the oxygen-free copper connecting rod, and the CVD diamond scattering target body.

[0013] A sealing cover is also provided on the outer side of one end of the rotating shaft where the bearing is located. The sealing cover is installed on the outer side of the vacuum chamber. A hollow shaft magnetofluid is also provided where the rotating shaft passes through the vacuum chamber cover plate. The hollow shaft magnetofluid is installed on the outer side of the vacuum chamber cover plate and located inside the motor support. The sealing cover and the hollow magnetofluid respectively seal the connection between the rotating shaft and the vacuum chamber and the vacuum chamber cover plate, so that a scattering target mounting space is formed between the vacuum chamber and the vacuum chamber cover plate, creating a sealed high vacuum environment.

[0014] The scattering target installation space is a flat rectangular space, and the space inside the vacuum pipe is perpendicularly connected to the lower part of the scattering target installation space.

[0015] A CVD diamond scattering target body is provided on the outer periphery of the turntable. When the turntable rotates at high speed for one revolution, the effective beam-cutting time between the CVD diamond scattering target body and the high-energy proton beam in the vacuum tube is 1ms.

[0016] The CVD diamond scattering target body is fixedly connected to one end of an oxygen-free copper connecting rod by brazing, and the other end of the oxygen-free copper connecting rod is fixedly connected to the outer circumferential surface of the turntable; the length of the upper bottom edge of the CVD diamond scattering target body is 2 to 4 times the length of the lower bottom edge, and the thickness of the CVD diamond scattering target body is 0.3 mm.

[0017] This invention discloses a method for using a rotating scattering target for extracting high-energy proton beams from a scatterer. Specifically, the high-energy proton beam passes through a vacuum pipe, and a turntable rotates at high speed, causing the CVD diamond scattering target to intermittently extend into the beam envelope space formed within the vacuum pipe, thereby cutting the high-energy proton beam and achieving high-energy proton scattering. One rotation of the turntable constitutes one cycle. Within one cycle, the CVD diamond scattering target cuts the proton beam once, with an effective cutting time of 1ms. The heat generated during the cutting process is rapidly conducted through the CVD diamond scattering target and the oxygen-free copper connecting rod.

[0018] When the rotating scattering target used for extracting high-energy proton beams from the above-mentioned scatterer is used, the principle is as follows: the scattering target assembly is placed in a high vacuum environment formed between the vacuum chamber and the vacuum chamber cover plate. The turntable rotates at a high speed of 1500 rpm, so that the CVD diamond scattering target body installed on its outer circumference intermittently cuts the high-energy proton beam, realizes the scattering of high-energy protons, and thus obtains high-energy protons that meet the scattering angle and extracts them. During the beam cutting process: First, because high-energy proton beams have very high energy, direct impact on the scattering target will result in significant beam loss. Using CVD diamond to fabricate the scattering target body, compared to traditional metal scattering targets (such as tungsten, beryllium, and titanium), can effectively reduce beam loss within the same volume. Second, high-energy protons will deposit a large amount of heat on the scattering target, leading to excessive temperature rise. CVD diamond, with its high melting point, fast thermal conductivity, and good thermal stability, can effectively solve the problem of excessive temperature rise compared to existing graphite scattering targets. Third, combined with the rotating structure of the scattering target, CVD diamond... The interaction between the CVD diamond scattering target and the proton beam is intermittent rather than continuous, and the actual beam-cutting time is very short, only 1 ms, which can further reduce beam loss and temperature rise. Fourth, the CVD diamond scattering target body is first fixed to the oxygen-free copper connecting rod by brazing, and then fixed to the outer circumference of the turntable by the oxygen-free copper connecting rod. Since oxygen-free copper has low thermal resistance, it can further improve the thermal conductivity of the entire scattering target assembly and reduce the temperature rise of the CVD diamond scattering target body. Fifth, the CVD diamond scattering target body adopts a trapezoidal plate shape, which results in a lower temperature rise at the same beam position compared to the traditional rectangular scattering target.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The rotating scattering target used for extracting the high-energy proton beam in this scatterer can achieve rapid heat conduction and simultaneously achieve effective beam cutting of the high-energy proton beam intermittently, effectively reducing the temperature rise of the scattering target and the beam loss of the high-energy proton beam.

[0021] In the rotating scattering target used for high-energy proton beam extraction in this scatterer, the scattering target body made of CVD diamond can effectively reduce beam loss in the same volume compared with traditional metal scattering targets (such as tungsten, beryllium, titanium, etc.). At the same time, due to the advantages of CVD diamond such as high melting point, fast thermal conductivity and good thermal stability, it can effectively solve the problem of excessive temperature rise of the scattering target compared with the existing graphite scattering target.

[0022] In the rotating scattering target used for extracting high-energy proton beams in this scatterer, the scattering target body is made of CVD diamond. Combined with the rotating structure of the scattering target, the interaction between the CVD diamond scattering target body and the proton beam is intermittent rather than continuous, and the actual beam cutting time is very short, which can further reduce beam loss and temperature rise.

[0023] In the rotating scattering target used for high-energy proton beam extraction in this scatterer, the CVD diamond scattering target body adopts a trapezoidal sheet shape, which results in a lower temperature rise at the same beam position compared to the traditional rectangular scattering target. At the same time, the CVD diamond scattering target body in this application is only 0.3mm thick, which is generally easy to break. In order to fix the CVD diamond scattering target body, it is brazed to one end of an oxygen-free copper connecting rod, and the other end of the oxygen-free copper connecting rod is fixed to the turntable. Through the connection, not only is the CVD diamond scattering target body fixed, but the thermal resistance is also effectively reduced, further improving the thermal conductivity. Attached Figure Description

[0024] Figure 1 This is a front view of the rotating scattering target used to extract the high-energy proton beam from this scatterer.

[0025] Figure 2 for Figure 1 AA section view.

[0026] Figure 3 This is a partial cross-sectional front view of the rotating scattering target used for extracting the high-energy proton beam from this scatterer.

[0027] Figure 4 for Figure 3 A three-dimensional view of the structure shown.

[0028] The components indicated by the reference numerals in the above figures are as follows: 1 is the turntable, 2 is the oxygen-free copper connecting rod, 3 is the CVD diamond scattering target body, 4 is the vacuum chamber, 5 is the vacuum chamber cover, 6 is the scattering target mounting space, 7 is the vacuum pipe, 8 is the rotating shaft, 9 is the bearing, 10 is the motor, 11 is the motor support base, 12 is the sealing cover, and 13 is the hollow shaft magnetofluid. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0030] Example

[0031] This embodiment describes a rotating scattering target for extracting high-energy proton beams from a scatterer, the structure of which is as follows: Figures 1 to 4As shown, the device includes a scattering target assembly, comprising a turntable 1, an oxygen-free copper connecting rod 2, and a CVD diamond scattering target body 3. One end of the oxygen-free copper connecting rod is brazed to the CVD diamond scattering target body, and the other end is fixedly connected to the outer circumference of the turntable. The turntable drives the oxygen-free copper connecting rod and the CVD diamond scattering target body to rotate at high speed. The CVD diamond scattering target body has a trapezoidal sheet structure. When using this rotating scattering target, the scattering target assembly needs to be placed in a high vacuum environment (vacuum degree ≤10E-6Pa). The turntable rotates at a high speed of 1500 rpm, causing the CVD diamond scattering target body mounted on its outer circumference to intermittently cut the high-energy proton beam, thereby scattering the high-energy protons and obtaining high-energy protons that meet the scattering angle and extracting them. During the beam cutting process: First, because high-energy proton beams have very high energy, direct interaction with the scattering target will result in significant beam loss. This application uses a CVD diamond-made scattering target body, which, compared to traditional metal scattering targets (such as tungsten, beryllium, titanium, etc.), can effectively reduce beam loss within the same volume. Second, high-energy protons will deposit a large amount of heat on the scattering target, leading to excessive temperature rise. CVD diamond has advantages such as high melting point, fast thermal conductivity, and good thermal stability, which can effectively solve the problem of excessive temperature rise compared to existing graphite scattering targets. Third, combined with the rotating structure of the scattering target, CVD diamond... The interaction between the diamond scattering target and the proton beam is intermittent rather than continuous, and the actual beam-cutting time is very short, which can further reduce beam loss and temperature rise. Fourth, the CVD diamond scattering target is only 0.3 mm thick, which is easily broken under normal circumstances. To fix the CVD diamond scattering target, it is brazed to one end of an oxygen-free copper connecting rod, and the other end of the oxygen-free copper connecting rod is fixed to the turntable. Through the connection, not only is the CVD diamond scattering target fixed, but thermal resistance is also effectively reduced, further improving thermal conductivity. Fifth, the CVD diamond scattering target adopts a trapezoidal sheet shape, which results in a lower temperature rise at the same beam position compared to the traditional rectangular scattering target.

[0032] The aforementioned rotating scattering target also includes a vacuum chamber 4 and a vacuum chamber cover 5, forming a scattering target mounting space 6 between the vacuum chamber and the vacuum chamber cover. Vacuum pipes 7 for high-energy proton beam passage are respectively provided on both sides of the vacuum chamber and the vacuum chamber cover. The scattering target mounting space is connected to the space inside the vacuum pipes, forming a sealed vacuum chamber. The scattering target assembly is located within the scattering target mounting space, and as the turntable rotates, the CVD diamond scattering target body intermittently extends into the beam envelope space formed inside the vacuum pipes. A high-vacuum space with a cross-shaped cross-section is formed between the scattering target mounting space and the space inside the vacuum pipes. The scattering target assembly is vertically positioned above the vacuum pipes. The high-energy proton beam passes through the vacuum pipes, and through the high-speed rotation of the scattering target assembly, the CVD diamond scattering target body enters the beam envelope space once per rotation cycle, cutting off the high-energy proton beam and quickly leaving, avoiding continuous interaction with the high-energy proton beam, thereby effectively reducing beam loss and temperature rise. A rotating shaft 8 is located at the center of the turntable. One end of the shaft is connected to the vacuum chamber via a bearing 9, and the other end passes through the vacuum chamber cover and is connected to a motor 10. The motor is fixedly mounted on the outside of the vacuum chamber cover via a motor support 11. Driven by the motor, the turntable rotates at high speed via the rotating shaft. A sealing cover 12 is also provided on the outside of the end of the shaft where the bearing is located. The sealing cover is installed on the outside of the vacuum chamber. A hollow shaft magnetofluid 13 is also provided where the shaft passes through the vacuum chamber cover. The hollow shaft magnetofluid is installed on the outside of the vacuum chamber cover and located inside the motor support. The sealing cover and the hollow magnetofluid seal the connection between the shaft and the vacuum chamber, and the vacuum chamber cover, respectively, creating a sealed high-vacuum environment between the vacuum chamber and the vacuum chamber cover to form a scattering target mounting space. The rotating shaft is arranged parallel to the vacuum pipe. The distance from the shaft axis to the top of the vacuum pipe is greater than the sum of the radius of the turntable and the length of the oxygen-free copper connecting rod, but less than the sum of the radius of the turntable, the length of the oxygen-free copper connecting rod, and the length of the CVD diamond scattering target body. To ensure that only the CVD diamond scattering target body comes into contact with the high-energy proton beam during beam cutting, the oxygen-free copper connecting rod should not interfere with the beam cutting process. The distance between the axis of rotation and the axis of vacuum pipe is greater than the sum of the radius of the turntable, the length of the oxygen-free copper connecting rod, and the length of the CVD diamond scattering target body.

[0033] The scattering target installation space is a flat rectangular space, and the space inside the vacuum pipe is perpendicularly connected to the lower part of the scattering target installation space.

[0034] Only one CVD diamond scattering target body is located on the outer circumference of the turntable. When the turntable rotates once at high speed, the effective beam-cutting time between the CVD diamond scattering target body and the high-energy proton beam in the vacuum tube is 1ms. The CVD diamond scattering target body is fixedly connected to one end of an oxygen-free copper connecting rod by brazing, and the other end of the oxygen-free copper connecting rod is fixedly connected to the outer circumference of the turntable. The length of the upper bottom edge of the CVD diamond scattering target body is 2 to 4 times the length of the lower bottom edge, and the thickness of the CVD diamond scattering target body is 0.3mm.

[0035] The method of using the rotating scattering target for extracting the high-energy proton beam in the above embodiment is as follows: the high-energy proton beam passes through the vacuum pipe, the turntable rotates at high speed, and drives the CVD diamond scattering target body to intermittently extend into the vacuum pipe to cut the high-energy proton beam, thereby realizing the scattering of high-energy protons; one rotation of the turntable is one cycle, and within one cycle, the CVD diamond scattering target body cuts the proton beam once, with an effective cutting time of 1ms. The heat generated during the cutting process is rapidly conducted by the CVD diamond scattering target body and the oxygen-free copper connecting rod.

[0036] When the rotating scattering target used for extracting high-energy proton beams from the above-mentioned scatterer is used, the principle is as follows: the scattering target assembly is placed in a high vacuum environment formed between the vacuum chamber and the vacuum chamber cover plate. The turntable rotates at a high speed of 1500 rpm, so that the CVD diamond scattering target body installed on its outer circumference intermittently cuts the high-energy proton beam, realizes the scattering of high-energy protons, and thus obtains high-energy protons that meet the scattering angle and extracts them. During the beam cutting process: First, because high-energy proton beams have very high energy, direct interaction with the scattering target will result in significant beam loss. Using a scattering target made of CVD diamond, compared to traditional metal scattering targets (such as tungsten, beryllium, and titanium), can effectively reduce beam loss within the same volume. Second, high-energy protons will deposit a large amount of heat on the scattering target, leading to excessive temperature rise. CVD diamond, with its high melting point, fast thermal conductivity, and good thermal stability, can effectively solve the problem of excessive temperature rise compared to existing graphite scattering targets. Third, combined with the rotating structure of the scattering target, the CVD diamond scattering target and the proton beam are intermittently cut. The CVD diamond scattering target is not a continuous action, and the actual beam-cutting time is very short, only 1ms, which can further reduce beam loss and temperature rise. Fourth, the CVD diamond scattering target body is only 0.3mm thick, making it very easy to break. To fix the CVD diamond scattering target body, it is brazed to one end of an oxygen-free copper connecting rod, and the other end of the oxygen-free copper connecting rod is fixed to the turntable. Through the connection, not only is the CVD diamond scattering target body fixed, but the thermal resistance is also effectively reduced, further improving the thermal conductivity and reducing the temperature rise of the CVD diamond scattering target body. Fifth, the CVD diamond scattering target body adopts a trapezoidal sheet shape, which results in a lower temperature rise at the same beam position compared to the traditional rectangular scattering target. In this embodiment, when using trapezoidal and rectangular scattering targets of the same material, area, length, and thickness for beam cutting, the comparison of the highest thermal deposition temperature of the two at the same distance from the beam center is shown in the following table:

[0037]

[0038] It is clear that the closer to the beam center, the higher the thermal deposition temperature on the scattering target; and at the same distance from the specific beam center, the maximum thermal deposition temperature on the trapezoidal scattering target is significantly lower than that on the rectangular scattering target.

[0039] As described above, the present invention can be well implemented. The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention; that is, all equivalent changes and modifications made in accordance with the content of the present invention are covered by the scope of protection claimed in the claims of the present invention.

Claims

1. A rotating scattering target for extracting high-energy proton beams from a scatterer, comprising a scattering target assembly, characterized in that, The scattering target assembly includes a turntable, an oxygen-free copper connecting rod, and a CVD diamond scattering target body. The CVD diamond scattering target body is fixedly connected to the outer periphery of the turntable via the oxygen-free copper connecting rod. The turntable drives the oxygen-free copper connecting rod and the CVD diamond scattering target body to rotate at high speed. The CVD diamond scattering target body has a trapezoidal sheet structure.

2. The rotating scattering target for extracting high-energy proton beams from a scatterer according to claim 1, characterized in that, It also includes a vacuum chamber and a vacuum chamber cover plate, with a scattering target mounting space formed between the vacuum chamber and the vacuum chamber cover plate; vacuum pipes for high-energy proton beams are respectively provided on both sides of the vacuum chamber and the vacuum chamber cover plate, and the scattering target mounting space is connected to the space inside the vacuum pipes to form a sealed vacuum chamber; the scattering target assembly is located in the scattering target mounting space, and as the turntable rotates, the CVD diamond scattering target body intermittently extends into the beam envelope space formed inside the vacuum pipes.

3. The rotating scattering target for extracting high-energy proton beams from a scatterer according to claim 2, characterized in that, The turntable has a rotating shaft at its center. One end of the rotating shaft is connected to the vacuum chamber through a bearing, and the other end of the rotating shaft passes through the vacuum chamber cover and is connected to a motor. The motor is fixedly installed on the outside of the vacuum chamber cover through a motor support.

4. The rotating scattering target for extracting high-energy proton beams from a scatterer according to claim 3, characterized in that, The rotating shaft is arranged parallel to the vacuum pipe. The distance from the axis of the rotating shaft to the top of the vacuum pipe is greater than the sum of the radius of the turntable and the length of the oxygen-free copper connecting rod, but less than the sum of the lengths of the radius of the turntable, the oxygen-free copper connecting rod, and the CVD diamond scattering target body.

5. A rotating scattering target for extracting high-energy proton beams from a scatterer according to claim 4, characterized in that, The distance between the axis of the rotating shaft and the axis of the vacuum pipeline is greater than the sum of the lengths of the turntable radius, the oxygen-free copper connecting rod, and the CVD diamond scattering target body.

6. A rotating scattering target for extracting high-energy proton beams from a scatterer according to claim 3, characterized in that, The rotating shaft is equipped with a sealing cover on the outer side of one end of the bearing. The sealing cover is installed on the outer side of the vacuum chamber. A hollow shaft magnetofluid is also provided where the rotating shaft passes through the vacuum chamber cover plate. The hollow shaft magnetofluid is installed on the outer side of the vacuum chamber cover plate and located inside the motor support seat.

7. A rotating scattering target for extracting high-energy proton beams from a scatterer according to claim 2, characterized in that, The scattering target installation space is a flat rectangular space, and the space inside the vacuum pipe is perpendicularly connected to the lower part of the scattering target installation space.

8. A rotating scattering target for extracting high-energy proton beams from a scatterer according to claim 2, characterized in that, A CVD diamond scattering target body is provided on the outer periphery of the turntable. When the turntable rotates at high speed for one revolution, the effective beam-cutting time between the CVD diamond scattering target body and the high-energy proton beam in the vacuum tube is 1ms.

9. A rotating scattering target for extracting high-energy proton beams from a scatterer according to claim 1, characterized in that, The CVD diamond scattering target body is fixedly connected to one end of an oxygen-free copper connecting rod by brazing, and the other end of the oxygen-free copper connecting rod is fixedly connected to the outer circumferential surface of the turntable; the length of the upper bottom edge of the CVD diamond scattering target body is 2 to 4 times the length of the lower bottom edge, and the thickness of the CVD diamond scattering target body is 0.3 mm.

10. A method of using a rotating scattering target for extracting a high-energy proton beam from a scatterer, comprising the rotating scattering target for extracting a high-energy proton beam from a scatterer as described in any one of claims 2 to 9, characterized in that... A high-energy proton beam passes through a vacuum tube. The rotating disk rotates at high speed, causing the CVD diamond scattering target to intermittently extend into the beam envelope space formed in the vacuum tube, cutting the high-energy proton beam and achieving high-energy proton scattering. One rotation of the disk is one cycle. In one cycle, the CVD diamond scattering target cuts the proton beam once. The effective cutting time is 1ms. The heat generated during the cutting process is rapidly conducted by the CVD diamond scattering target and the oxygen-free copper connecting rod.

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