A high power accelerator beam multi-sector circular aperture collimator

Abstract

The invention discloses a high-power accelerator beam multi-sector circular hole collimator, which mainly comprises: collimating sector poles, insulating pads, a main body outer frame, a water-cooling transition piece, a ferrule joint, an aviation plug, a sealing ring A, a sealing ring B, a sealing ring C, a sealing ring D, a plastic pipe, a screw A, a screw B, a collimator front panel, and a collimator rear panel; the collimating sector poles are multiple, uniformly distributed in the circumferential direction, and made of copper material, and are used as the sector poles of the multi-sector circular hole collimator; each sector pole is led to the outside of the multi-sector circular hole collimator through a wire and an aviation plug for electrical signal processing, and the beam current intensity hitting each sector pole is obtained, so as to judge the beam position deviation and deviation direction and the beam intensity distribution; the invention can realize beam collimation by blocking the beam outside the specified collimator circular hole size, and can also judge the size, shape, convergence and dispersion of the beam and the beam deviation direction.

Description

Technical Field

[0001] The invention relates to an accelerator beam collimator, in particular to a high-power accelerator beam multi-sector circular hole collimator, belonging to the technical field of particle accelerators. Background Art

[0002] Beam collimators are often used on the accelerator beam lines of proton and heavy ion accelerators. The function of the beam collimator is generally to block the beam outside a certain area, or to measure the intensity of the beam outside a certain area, or to measure the beam position deviation and the beam intensity distribution in the deviation direction to guide the adjustment of the operating parameters of the accelerator-related equipment.

[0003] Accelerator beam collimators generally use circular hole collimators, that is, the center of the collimator is a circular hole, and the accelerator beam can pass through the circular hole. The beam outside the circular hole area is blocked by the collimator. Existing circular hole beam collimators can be divided into low-power beam collimators and high-power beam collimators according to power; according to whether they are divided into sectors, they can be divided into single circular hole beam collimators and multi-sector circular hole beam collimators. Low-power beam collimators generally use single molybdenum sheet circular hole beam collimators or multi-sector molybdenum sheet circular hole beam collimators, which are electrically insulated with ceramic gaskets and have no water cooling. High-power beam collimators generally use water-cooled single-circular-hole beam collimators; or a water-cooled single-circular-hole beam collimator is used in combination with a multi-sector molybdenum sheet circular-hole beam collimator. The two are located adjacent to each other, with the water-cooled single-circular-hole beam collimator in front of the multi-sector molybdenum sheet circular-hole beam collimator. The former has a slightly larger opening than the latter, and the former blocks most of the beam power.

[0004] At present, domestic high-power proton accelerators or heavy ion accelerators generally have high requirements for beam diagnosis and need high-power beam collimators. They hope that the high-power beam collimator can block the beam outside the area, and also hope that the high-power beam collimator can determine the beam position deviation and the distribution of beam intensity in the deviation direction. However, the single-hole beam collimator of the prior art high-power beam collimator can only scrape off the beam outside a certain area, and cannot be used as a diagnostic element for beam position deviation, because it is a single hole, and it is impossible to measure which side the beam deviates from when it hits the single hole; the second type of the prior art high-power beam collimator is a beam collimator that combines a water-cooled single-hole beam collimator with a multi-fan molybdenum sheet circular hole beam collimator. Although this combined collimator can be used in combination in theory, it is rarely used in practice: first, the molybdenum sheet collimator is made for the sake of simple structure and does not want water cooling. If the insulation and water cooling structure are introduced at the same time, it will be very complicated, because although the melting point of molybdenum is high, it has poor heat dissipation without water cooling, causing the temperature to rise linearly, so only a small power will not melt, so the molybdenum sheet collimator can only withstand small power beam loss. Second, since the collimator based on molybdenum sheets can only withstand small power, if it is used for high power, a single-hole water-cooled collimator must be placed behind or in front of the molybdenum sheet collimator. The first method is to place a single-hole water-cooled collimator behind the molybdenum sheet collimator. In this combination, the hole in the middle of the molybdenum sheet collimator must be larger than the hole in the single-hole water-cooled collimator. The beam hitting the two holes cannot determine the direction of the beam distribution. In addition, if the large beam deviates and hits a molybdenum sheet, the molybdenum sheet cannot withstand such a large power. Third, the second method is to place the single-hole collimator in front and the molybdenum sheet collimator in the back. The problem with this combination is that it is sometimes difficult to determine which direction the beam position is biased. If a small beam is used for beam modulation, the beam shape is an inclined ellipse and the beam position deviation is large. Most of the beam hits the single-hole collimator. At this time, it is difficult to determine the deviation direction of the beam position. The single circular hole collimator is in front and the molybdenum sheet collimator is in the back. Since the molybdenum sheet is placed in the back and the power it can withstand is very low, only a small part of the molybdenum sheet can be exposed. If the total beam loss on the collimator is 10 microamperes, this structure makes the beam hitting the single circular hole collimator in the front may be 9 microamperes, while the beam hitting the molybdenum sheet collimator in the back is 1 microampere. In this case, it is difficult to judge the direction of beam deviation based on the amount of beam on a certain molybdenum sheet.

[0005] Due to the above three reasons, this combination of high-power collimators is rarely used in actual work. In actual use, either a molybdenum sheet collimator is used alone, but it can only be used in low-power occasions, or a single circular hole collimator is used alone, but the single circular hole collimator can only block the beam outside the area and cannot determine the beam position deviation and the distribution of beam intensity in the deviation direction. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention proposes a high-power accelerator beam multi-sector circular hole collimator, aiming to solve the problem that the prior art high-power single circular hole beam collimator can only block the beam outside the area but cannot determine the beam position deviation and the beam intensity distribution in the deviation direction.

[0007] A high-power accelerator beam multi-sector circular hole collimator, the high-power accelerator beam multi-sector circular hole collimator mainly comprises: collimating sector poles, insulating pads, a main body outer frame, a water-cooled transition piece, a ferrule joint, an aviation plug, a sealing ring A, a sealing ring B, a sealing ring C, a sealing ring D, a plastic pipe, a screw A, a screw B, a collimator front panel, and a collimator rear panel;

[0008] Features:

[0009] The collimating fan pole 1 has multiple fans, which are evenly distributed in the circumferential direction and are made of copper material, and serve as fans of a multi-fan circular hole collimator; a circular hole is formed in the middle of the multiple collimating fan poles, and the beam in the circular hole area can pass through, and the beam outside the circular hole area hits the collimating fan pole at the corresponding position, and the collimating fan pole blocks the beam outside the circular hole area;

[0010] Each of the fan poles is provided with a threaded hole, and the threaded hole is used to screw the wire head. The wire is directly screwed on the fan stage, and the beam hitting the fan pole is led to the outside of the multi-sector circular hole collimator through the wire and the aviation plug for electrical signal processing to obtain the beam intensity hitting each fan pole, thereby judging the beam position deviation and deviation direction and beam intensity distribution;

[0011] A water cooling passage is provided inside the collimating fan pole, and water can be passed through the passage to cool the collimating fan pole and remove the beam power lost in the collimating fan pole;

[0012] The central shape of the collimating fan pole is a part of a circular hole, and the structure on the beam inlet side is an oblique angle, forming a cone hole to increase the distribution area of ​​beam loss power; there are small gaps between the multiple collimating fan poles to maintain electrical insulation between adjacent collimating fan poles;

[0013] Preferably, there is a certain angle between the gaps between the multiple collimating fan poles and the beam direction, that is, the side surfaces of the collimating fan poles are not parallel to the beam axis, so that the beam outside the circular hole area of ​​the collimator and between adjacent collimating fan poles can be prevented from leaking through the collimator.

[0014] The number of the collimating fan poles is preferably 4, but is not limited to 4.

[0015] The same number of insulating spacers as the collimating fan poles are located outside the collimating fan poles and evenly distributed circumferentially to serve as insulating supports for the collimating fan poles. The insulating spacers are generally made of high-quality engineering plastics with good radiation resistance, such as polyetheretherketone or polysulfone. Each collimating fan pole is independently electrically insulated to the outside, and has a separate wire leading to the outside of the collimator through an aviation plug, so that the beam hitting each collimating fan pole can be measured.

[0016] The collimating fan poles, insulating spacers, water-cooled transition pieces, ferrule joints and plastic pipes form a cooling water path. The two ferrule joints not connected to the plastic pipes in the figure are connected to the external water inlet and outlet plastic pipes. After deionized water is introduced into the water path, multiple collimating fan poles can be cooled, so that the collimating fan poles can withstand the beam power lost thereon, and the collimating fan poles are cooled while being electrically insulated. The sealing ring C, the sealing ring D and the ferrule joint play a role of water sealing at the connection positions between adjacent parts in the water cooling path.

[0017] By changing the size of the circular hole in the middle of the collimator, different requirements for beam alignment can be achieved; by changing the interface form between the front panel and the rear panel of the collimator and adjacent equipment, it can adapt to the connection of different adjacent equipment.

[0018] Advantages and effects of the present invention

[0019] 1. The present invention solves a long-standing technical problem in the field, namely, the technical problem that a multi-sector circular hole collimator for an accelerator beam simultaneously satisfies insulation, water cooling, and vacuum sealing. The above technical problems are solved by providing a circumferentially uniformly distributed multi-sector collimator made of copper material, providing wires and aviation plugs and an electrical signal processing circuit for connecting each sector of the collimator for judging beam position deviation and deviation direction and beam intensity distribution, and providing an independent water cooling device and an independent insulation device on each sector.

[0020] 2. The present invention realizes multi-sector, insulation, water cooling and vacuum sealing, and the effect is significantly better than the high-power single-circular hole collimator and low-power multi-sector molybdenum sheet collimator in the prior art: the present invention can not only block the beam outside the specified collimator circular hole size to achieve beam collimation, but also can be combined with the back-end controller as the "eyes" of the back-end controller debugging, and online monitor the beam intensity lost on each collimation sector and the total lost beam, so as to judge the size, shape, convergence and beam deviation of the beam, which is very beneficial for guiding the beam adjustment and automatic stable operation of high-power accelerators, and can also realize convenient beam defocusing while ensuring that the beam shape is as close to a circle as possible to adapt to the problem that the power density of the target beam of some accelerators cannot be too concentrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the partial explosion structure of the accelerator beam multi-sector circular hole collimator of the present invention.

[0022] Figure 2 Schematic diagram A of the structure of the accelerator beam multi-sector circular aperture collimator of the present invention.

[0023] Figure 3 Schematic diagram B of the structure of the accelerator beam multi-sector circular aperture collimator of the present invention.

[0024] Figure 4 A schematic diagram of the main body outer frame structure of the accelerator beam multi-sector circular aperture collimator of the present invention.

[0025] Figure 5 A schematic structural diagram of the collimating sector poles and insulating spacer blocks of the accelerator beam multi-sector circular hole collimator of the present invention.

[0026] Figure 6 A front view and a cross-sectional view of the accelerator beam multi-sector circular aperture collimator of the present invention.

[0027] Figure 7 A side view and a cross-sectional view of the accelerator beam multi-sector circular aperture collimator of the present invention.

[0028] Figure 8 Rear view of the accelerator beam multi-sector circular aperture collimator of the present invention.

[0029] Fig. 9 The accelerator beam multi-sector circular hole collimator of the present invention is equipped with a schematic diagram of the front and rear panels of the collimator and a pipeline adapter.

[0030] Fig.10 The accelerator beam multi-sector circular hole collimator of the present invention is equipped with a schematic diagram of front and rear adjacent devices.

[0031] Fig.11 The accelerator beam multi-sector circular hole collimator of the present invention is equipped with a cross-sectional view of front and rear adjacent devices.

[0032] Figure markings: 1. Collimation fan pole, 2. Insulation spacer, 3. Main body frame, 4. Water-cooled transition piece, 5. Compression fitting, 6. Aviation plug, 7. Sealing ring A, 8. Sealing ring B, 9. Sealing ring C, 10. Sealing ring D, 11. Plastic tube, 12. Screw A, 13. Screw B, 14. Collimator front panel, 15. Collimator rear panel, 16. Pipe adapter A, 17. Pipe adapter B, 18. Sealing ring E, 19. Beam pipe, 20. Compensation bellows, 21. Accelerator beam. DETAILED DESCRIPTION

[0033] The present invention will be further explained below in conjunction with the accompanying drawings.

[0034] Design principle of the present invention

[0035] 1. The principle of automatic adjustment of high-power beam parameters in the present invention: particle accelerator equipment is operated automatically. Since some equipment parameters may drift during automatic operation, they need to be automatically retrieved after drifting, and cannot rely on the method of manually turning knobs. Automatic retrieval requires a set of program judgments, and program judgments must have eyes. The "eyes" of the present invention tell it where the beam deviates and how much it deviates, thereby realizing automatic adjustment of parameters of the accelerator system. The single circular hole collimator of the prior art does not have the "eye" function because it cannot judge the beam deflection, and the low-power multi-sector molybdenum sheet collimator of the prior art cannot withstand high-power beams and cannot serve as the "eyes" for high-power beam adjustment. Therefore, both collimators of the prior art cannot serve as the "eyes" for high-power beam adjustment.

[0036] 2. The present invention simultaneously meets the design principles of multiple fans, insulation, water cooling and vacuum sealing.

[0037] Low-power single-circular hole or four-sector molybdenum sheet collimator has a relatively simple structure because it has no water cooling. The support, positioning and insulation of the molybdenum sheet can be achieved through the ceramic tube support. Medium and high-power single-circular hole water-cooled collimator has no fans and does not require multiple separate insulations. Therefore, the internal insulation is not considered during the structural design. It can be directly made into an integral external insulation. There is no insulation problem inside the collimator, and there is only one water cooling, so the structure is relatively simple. The high-power accelerator beam multi-sector circular hole collimator designed by the present invention must meet multiple poles at the same time, and each pole must have an independent water cooling circuit and achieve internal insulation separately. These must also be achieved under the condition that all introduced structures meet the vacuum sealing at the same time, because the collimator must be a vacuum environment through which the beam can pass. This design cleverly makes the insulating support structure of each pole into a part of the water cooling passage, and also as a part of the vacuum sealing; the insulating structure realizes the water cooling of the pole, the water sealing of the water cooling circuit, the sealing of the water passage to the vacuum, and the vacuum sealing of the collimator to the external atmosphere on the premise of achieving the insulation and support positioning of a single pole.

[0038] Based on the above principle, the present invention designs a high-power accelerator beam multi-sector circular aperture collimator.

[0039] A high power accelerator beam multi-sector circular aperture collimator Figure 1 As shown, the high-power accelerator beam multi-fan circular hole collimator mainly includes: a collimating fan pole 1, an insulating spacer 2, a main body outer frame 3, a water-cooled transition piece 4, a ferrule joint 5, an aviation plug 6, a sealing ring A, a sealing ring B, a sealing ring C, a sealing ring D, a plastic tube, a screw A, a screw B, a collimator front panel 14, and a collimator rear panel 15;

[0040] Features:

[0041] The collimating fan poles are multiple in number, evenly distributed in the circumferential direction, and made of copper material, and are used as the fan poles of the multi-fan circular hole collimator; the multiple collimating fan poles are assembled in the middle to form a circular hole, and the beam in the circular hole area can pass through, and the beam outside the circular hole area hits the collimating fan pole at the corresponding position, and the collimating fan pole blocks the beam outside the circular hole area;

[0042] Each of the fan poles is provided with a threaded hole, and the threaded hole is used to screw the wire head. The wire is directly screwed on the fan stage, and the beam hitting the fan pole is led to the outside of the multi-sector circular hole collimator through the wire and the aviation plug for electrical signal processing to obtain the beam intensity hitting each fan pole, thereby judging the beam position deviation and deviation direction and beam intensity distribution;

[0043] A water cooling passage is provided inside the collimating fan pole, and water can be passed through the passage to cool the collimating fan pole and remove the beam power lost in the collimating fan pole;

[0044] The central shape of the collimating fan pole is a part of a circular hole, and the structure on the beam inlet side is an oblique angle, forming a cone hole to increase the distribution area of ​​beam loss power; there are small gaps between the multiple collimating fan poles to maintain electrical insulation between adjacent collimating fan poles;

[0045] Preferably, there is a certain angle between the gaps between the multiple collimating fan poles and the beam direction, that is, the side surfaces of the collimating fan poles are not parallel to the beam axis, so that the beam outside the circular hole area of ​​the collimator and between adjacent collimating fan poles can be prevented from leaking through the collimator.

[0046] The number of the collimating fan poles is preferably 4, but is not limited to 4.

[0047] Additional notes:

[0048] There is a big difference in temperature rise between water cooling and no water cooling in high-power collimators, because there is no convection heat dissipation under vacuum conditions and most of it can only rely on thermal radiation. In this case, even the most high-temperature resistant materials can only withstand very small power. For example, a few watts of power in a vacuum will quickly rise in temperature due to poor heat dissipation conditions. This is because there is no thermal balance device, so the temperature keeps rising. The present invention has water cooling, so the temperature rise is very small and thermal balance can be achieved. With water cooling, the power is directly taken away. If the melting point of aluminum is more than 600 degrees, using 100 watts of power, although it exceeds the power of a few watts by dozens of times, due to the use of water cooling, thermal balance is achieved when the temperature rises to 300 degrees. If there is no water cooling, heat dissipation by thermal radiation alone is very slow. For example, the limit is only 3 watts of heat dissipation capacity, so the power cannot exceed 3 watts, so the power it withstands is very low, because its temperature is constantly rising, and the material melts before reaching thermal balance. The water cooling structure of the present invention can ensure thermal balance, so that the high-power beam will not melt the fan pole when it hits the fan pole.

[0049] The same number of insulating spacers as the collimating fan poles are located outside the collimating fan poles and evenly distributed circumferentially to serve as insulating supports for the collimating fan poles. The insulating spacers are generally made of high-quality engineering plastics with good radiation resistance, such as polyetheretherketone or polysulfone. Each collimating fan pole is independently electrically insulated to the outside, and has a separate wire leading to the outside of the collimator through an aviation plug, so that the beam hitting each collimating fan pole can be measured.

[0050] The collimating fan poles, insulating spacers, water-cooled transition pieces, ferrule joints and plastic pipes form a cooling water circuit. In the figure, the two ferrule joints that are not connected to the plastic pipes are connected to the external water inlet and outlet plastic pipes. After deionized water is introduced into the water circuit, multiple collimating fan poles can be cooled, so that the collimating fan poles can withstand the beam power lost thereon, and the collimating fan poles are cooled while being electrically insulated. The sealing ring C, sealing ring D and ferrule joint play a role of water sealing at the connection positions between adjacent parts in the water cooling passage.

[0051] By changing the size of the circular hole in the middle of the collimator, different requirements for beam alignment can be achieved; by changing the interface form between the front panel and the rear panel of the collimator and adjacent equipment, it can adapt to the connection of different adjacent equipment.

[0052] Example

[0053] The high power accelerator beam multi-sector circular hole collimator of the present invention (such as Figure 1 , 2 , 9, and 11), can be used as a beam collimator and beam position distribution diagnostic element for high-power proton or heavy ion accelerators. The collimator can block the beam outside the collimator circular hole, and can monitor the beam loss on each collimator fan pole and the total beam loss in real time, so as to judge the size, shape, convergence and dispersion of the beam and the beam deflection, and guide the automatic operation and beam adjustment of the accelerator. The main process of its function realization is as follows:

[0054] (a) If Figure 1 , 2 , 3, 4, 5, 6, 7, 8, 9, 4 sets of insulating gaskets and collimating fan poles are installed in the main body frame, and an aviation plug is installed on one side outside the main body frame. The insulating gaskets support the collimating fan poles to insulate the collimating fan poles from the outside; each collimating fan pole is connected to a wire, which is led out of the aviation plug to the outside of the main body frame. A circular hole is formed in the middle of the 4 collimating fan poles, and the collimating fan poles have chamfers in the direction where the beam enters the collimator, that is, the beam first enters the conical hole formed by the 4 collimating fan poles, and then enters the circular hole. The beam outside the circular hole is blocked by the collimating fan pole, and the beam intensity lost on each collimating fan pole can be measured. Only the beam in the circular hole in the middle of the collimating fan pole can pass through, forming a beam-clamping and collimating effect on the beam.

[0055] (ii) Figure 1 ,2 , 3, 5, 7, collimating fan poles, insulating spacers, water-cooled transition pieces, ferrule joints and plastic pipes form a cooling water circuit. The two ferrule joints that are not connected to the plastic pipes are connected to the water inlet and outlet plastic pipes. After deionized water is introduced into the water circuit, the four collimating fan poles can be cooled so that the collimating fan poles can withstand the beam power lost on them.

[0056] (III) Figure 1 , 2 , 3, 4, 5, 6, 7, 9, 10, 11, sealing ring A, sealing ring B, sealing ring C, sealing ring E, as well as the sealing ring at the aviation plug and the sealing rings outside the front and rear panels of the collimator, separate the inside of the collimator from the atmosphere or waterway, and play a role in vacuum sealing, so that the inside of the collimator is a vacuum environment when it is in use.

[0057] (IV) Figure 1 , 5 7. Sealing ring C, sealing ring D and ferrule joint act as water seals at the connection positions between adjacent parts in the water cooling passage.

[0058] (V) Fig. 9 , 10 11. Pipe adapter A, pipe adapter B and beam pipe are installed before the front panel of the collimator. Sealing ring E realizes the external vacuum sealing of the beam pipe. The insertion amount of the beam pipe is adjustable within a certain range. The adjacent parts are connected and fixed by screws and the vacuum sealing ring is pressed tightly. The adjacent equipment after the rear panel of the collimator, such as the compensation bellows, is connected and fixed by screws and the vacuum sealing ring is pressed tightly. The accelerator beam enters the collimator from left to right in the beam pipe. The beam outside the circular hole is blocked by the collimating fan pole, and the beam intensity lost on each collimating fan pole can be measured. Only the beam in the middle circular hole of the collimating fan pole can pass through, forming a beam-stuck collimating effect on the beam. The collimator also serves as a beam diagnostic element to guide the accelerator beam modulation and parameter adjustment and beam monitoring during accelerator operation. Due to its water cooling function, it can be used as a beam collimator and beam position distribution diagnostic element for high-power proton or heavy ion accelerators.

[0059] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive, and thus the present invention includes but is not limited to the embodiments described in the specific implementation manner.

Claims

1. A high-power accelerator beam multi-sector circular aperture collimator, the high-power accelerator beam multi-sector circular aperture collimator comprising: Collimator fan pole, insulating spacer, main body frame, water-cooled transition piece, ferrule joint, aviation plug, sealing ring A, sealing ring B, sealing ring C, sealing ring D, plastic tube, screw A, screw B, collimator front panel, collimator rear panel; Features: The collimating fan-pole has four fans, which are evenly distributed in the circumferential direction and made of copper material, and are used as fans of a multi-fan circular hole collimator; a circular hole is formed in the middle of the multiple collimating fan-pole pieces, and the beam in the circular hole area can pass through, and the beam outside the circular hole area hits the collimating fan-pole at the corresponding position, and the collimating fan-pole blocks the beam outside the circular hole area; A threaded hole is provided on each sector pole, and the threaded hole is used to screw the lead head. The lead is directly screwed on the sector pole, and the beam hitting the sector pole is led to the outside of the multi-sector circular hole collimator through the lead and the aviation plug for electrical signal processing to obtain the beam intensity hitting each sector pole, thereby judging the beam position deviation and deviation direction and beam intensity distribution; A water cooling passage is provided inside the collimating fan pole, and water can be passed through the passage to cool the collimating fan pole and remove the beam power lost in the collimating fan pole; The central shape of the collimating fan pole is a part of a circular hole, and the structure on the beam inlet side is an oblique angle, forming a cone hole to increase the distribution area of ​​beam loss power; there are small gaps between the multiple collimating fan poles to maintain electrical insulation between adjacent collimating fan poles; There is a certain angle between the gaps between the multiple collimating fan poles and the beam direction, that is, the side surface of the collimating fan pole is not parallel to the beam axis, so as to prevent the beam outside the circular hole area of ​​the collimator and between adjacent collimating fan poles from leaking through the collimator; The same number of insulating spacers as the collimating fan poles are located outside the collimating fan poles and evenly distributed circumferentially to serve as insulating supports for the collimating fan poles. The insulating spacers are made of the following high-quality engineering plastics with good radiation resistance: polyetheretherketone or polysulfone. Each collimating fan pole is independently electrically insulated to the outside, and has a separate wire leading to the outside of the collimator through an aviation plug, so that the beam hitting each collimating fan pole can be measured.

2. A high power accelerator beam multi-sector circular aperture collimator as claimed in claim 1, characterized in that: The collimating fan poles, insulating spacers, water-cooled transition pieces, ferrule joints and plastic pipes form a cooling water path. The two ferrule joints that are not connected to the plastic pipes are connected to the external water inlet and outlet plastic pipes. After deionized water is introduced into the water path, multiple collimating fan poles can be cooled, so that the collimating fan poles can withstand the beam power lost thereon, and the collimating fan poles are cooled while being electrically insulated. The sealing ring C, the sealing ring D and the ferrule joint play a role of water sealing at the connection positions between adjacent parts in the water cooling path.

3. A high power accelerator beam multi-sector circular aperture collimator as claimed in claim 1, characterized in that: By changing the size of the circular hole in the middle of the collimator, different requirements for beam alignment can be achieved; by changing the interface form between the front panel and the rear panel of the collimator and adjacent equipment, it can adapt to the connection of different adjacent equipment.

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