Stripping target device for cyclotron and cyclotron system

Abstract

The present application relates to the technical field of cyclotron and discloses a stripping target device of a cyclotron and a cyclotron system, the stripping target device of the cyclotron comprising a cantilever and a target film assembly, the cantilever being used for extending into a vacuum chamber of the cyclotron, a free end of the cantilever having a mounting space, the target film assembly being rotatably arranged in the mounting space, and a heat exchange flow channel for accommodating a cooling medium being arranged in the target film assembly. The stripping target device can overcome the technical problem of excessively high temperature of a stripping film and a stripping film support, the cooling medium can flow into the heat exchange flow channel, so that the heat of the target film assembly is taken away, the temperature of the target film assembly is reduced, and the deformation or damage of the target film assembly caused by excessively high temperature of the target film assembly is avoided.

Description

Technical Field

[0001] This invention relates to the field of cyclotron technology, and more specifically, to a target stripping device for cyclotrons and a cyclotron system. Background Technology

[0002] In recent years, cyclotrons have been increasingly used in isotope production, cancer treatment, and other fields, with compact cyclotrons accounting for a large proportion. Compact cyclotrons have advantages such as small equipment footprint and stable performance, but their compact structure and small magnetic pole gap impose stringent requirements on the size of each component inside the accelerator.

[0003] In a cyclotron, negative hydrogen or heavy ion particles can be accelerated by stripping. After the particles are accelerated to a specified energy, they pass through a stripping membrane at a designated position. After a certain amount of charge is stripped off, the particle charge-to-mass ratio changes, and the particle trajectory in the magnetic field is deflected. The particle beam will be extracted along the extraction trajectory. Therefore, whether the stripping membrane accurately reaches the designed stripping point is the key to whether the beam can be stripped and extracted, and it is also one of the key points for whether the accelerator can achieve its design and performance.

[0004] During the stripping and extraction of the beam, the beam bombardment of the stripping membrane generates a large amount of heat and current. The stripping membrane can be damaged or deformed at excessively high temperatures, requiring replacement. More likely, the heat from the stripping membrane will transfer to the stripping membrane support and other structures, causing deformation or damage and preventing the accelerator from operating properly. The existing technical solution, "A Cyclotron Target Stripping Device and Method," patent number CN117119667A, doesn't even include water cooling, resulting in heat concentration in the target disk area, which reduces the carbon film's lifespan. Therefore, water cooling of the rotating target head is essential. However, in a laterally arranged stripping target device, the target disk rotation axis is at a 90-degree angle to the cantilever, making water cooling of the target disk difficult to achieve with conventional techniques (requiring rotary seals, which are complex and have poor reliability).

[0005] In the existing technology, how to reduce the temperature of the release film and the release film support is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a stripping target device for a cyclotron and a cyclotron system. The stripping target device for the cyclotron can overcome the technical problem of excessively high temperatures in the stripping membrane and its support. A cooling medium can flow through the heat exchange channel, thereby carrying away heat from the target membrane assembly, reducing its temperature, and preventing deformation or damage caused by excessively high temperatures.

[0007] A target stripping device for a cyclotron accelerator according to one embodiment of the present invention includes:

[0008] A cantilever for extending into the vacuum chamber of a cyclotron, wherein the free end of the cantilever extending into the vacuum chamber of the cyclotron has an installation space;

[0009] A target membrane assembly having a heat exchange channel for containing a cooling medium.

[0010] In the target stripping device of the cyclotron, the cooling medium can flow through the heat exchange channel to remove heat from the target membrane assembly, thereby reducing the temperature of the target membrane assembly and preventing it from becoming too hot, which could lead to deformation or damage.

[0011] Optionally, the target stripping device of the cyclotron also includes:

[0012] A heat exchange assembly, comprising a first heat exchange tube and a second heat exchange tube located in the installation space, wherein the inlet of the first heat exchange tube is connected to the heat exchange channel, and the outlet of the second heat exchange tube is connected to the heat exchange channel.

[0013] Optionally, the free end of the cantilever has two parallel mounting pieces, which are arranged at intervals, and the mounting space is defined between the two mounting pieces;

[0014] The target membrane assembly is located in the mounting space and is rotatably mounted on the mounting plate;

[0015] The target membrane assembly includes:

[0016] A rotating shaft, the two ends of which are rotatably mounted on the two mounting plates respectively, the rotating shaft being orthogonal to the mounting plates;

[0017] A target film turntable is mounted on the rotating shaft and located in the installation space;

[0018] The first gear is mounted on the rotating shaft and connected to the target film turntable. The heat exchange channel is located inside the first gear.

[0019] Optionally, both the first heat exchange tube and the second heat exchange tube are spirally arranged with the center line of the rotating shaft as the axis;

[0020] The first heat exchange tube is elastic, and the second heat exchange tube is elastic;

[0021] The outlet of the first heat exchange tube is connected to the mounting plate, and the inlet of the second heat exchange tube is connected to the mounting plate.

[0022] Optionally, the first heat exchange tube is spirally arranged in a plane parallel to the mounting plate;

[0023] The second heat exchange tube is spirally arranged in a plane parallel to the mounting plate.

[0024] Optionally, the spiral planes of the first heat exchange tube and the spiral planes of the second heat exchange tube are spaced apart.

[0025] Optionally, multiple first heat exchange tubes are provided, wherein the spiral planes of two adjacent first heat exchange tubes are spaced apart;

[0026] The second heat exchange tube is provided in multiple forms, wherein the spiral planes of two adjacent second heat exchange tubes are spaced apart.

[0027] Optionally, the cantilever is provided with a straight groove that extends to the mounting plate in the length direction of the cantilever. The mounting plate is provided with a support platform located in the mounting space. The support platform is provided with a rotating hole orthogonal to the mounting plate, and the rotating hole communicates with the straight groove.

[0028] The target stripping device of the cyclotron further includes a rotating assembly, which comprises:

[0029] The transmission component includes a linkage rod, a second gear, and a worm gear. The second gear and the worm gear are respectively disposed at both ends of the linkage rod, and the linkage rod is rotatably disposed in the rotating hole. The second gear and the worm gear are respectively located at both ends of the support platform. The worm gear extends into the straight groove, and the second gear meshes with the first gear.

[0030] A first worm gear extends into the straight groove along the length of the cantilever, and the first worm gear meshes with the worm wheel;

[0031] A first motor is mounted on the cantilever, and the output shaft of the first motor is connected to the first worm gear.

[0032] Optionally, the target stripping device of the cyclotron also includes:

[0033] At least one carbon film support is mounted on the target film turntable.

[0034] Another embodiment of the cyclotron system of the present invention includes the target stripping device of the cyclotron described above. Attached Figure Description

[0035] Figure 1 This is a three-dimensional schematic diagram of the target stripping device in a specific embodiment of the present invention.

[0036] Figure 2 This is a schematic diagram of the assembly between the target film assembly and the rotating assembly in a specific embodiment of the present invention.

[0037] Figure 3 yes Figure 2 A partial schematic diagram of A in the middle.

[0038] Figure 4 This is a schematic diagram of the assembly between the first gear and the elastic component in a specific embodiment of the present invention.

[0039] Figure 5 This is a schematic diagram of the axial cross-section of the first gear in a specific embodiment of the present invention.

[0040] Reference numerals: 1000-Target stripping device, 100-Cantilever, 110-Free end, 120-Mounting plate, 130-Mounting space, 140-Straight groove, 150-Support platform, 200-Target film assembly, 210-Rotating shaft, 220-Target film turntable, 230-First gear, 231-Heat exchange channel, 300-Elastic component, 310-First heat exchange tube, 320-Second heat exchange tube, 400-Rotating component, 410-Transmission component, 411-Linkage rod, 412-Second gear, 413-Worm gear, 420-First worm, 430-First motor, 500-Carbon film support. Detailed Implementation

[0041] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0042] The target stripping device 1000 and the cyclotron system of the present invention are described below with reference to the accompanying drawings. Figures 1 to 5 As shown, the target stripping device 1000 of the cyclotron accelerator in this embodiment of the invention includes a cantilever 100, a target membrane assembly 200, and an elastic assembly 300.

[0043] The cantilever 100 is used to extend into the vacuum chamber of the cyclotron. The free end 110 of the cantilever 100 extending into the vacuum chamber of the cyclotron has two parallel mounting plates 120. The two mounting plates 120 are arranged at intervals and define an installation space 130 between the two mounting plates 120. The target film assembly 200 is rotatably disposed on the mounting plates 120 and located in the installation space 130. The target film assembly 200 is provided with a heat exchange channel 231 for accommodating the cooling medium.

[0044] According to the target stripping device 1000 in a specific embodiment of the present invention, the cooling medium can flow through the heat exchange channel 231 to remove the heat from the target film assembly 200, reduce the temperature of the target film assembly 200, and prevent the target film assembly 200 from being deformed or damaged due to excessive temperature.

[0045] like Figures 1 to 5 As shown, in order to make the technical solution of this application easier to understand, the technical solution of this application will be described in more detail below with a specific embodiment of the stripping target device 1000.

[0046] In some specific embodiments, such as Figure 1 As shown, the free end 110 of the cantilever 100 can extend into the vacuum chamber to allow the beam in the vacuum chamber to bombard the carbon film on the free end 110. The free end 110 of the cantilever 100 has two parallel mounting plates 120, which are spaced apart and define a mounting space 130 between them. The two mounting plates 120 are mainly for facilitating the installation of the target film assembly 200.

[0047] In some specific embodiments, such as Figure 1 As shown, the cantilever 100 is provided with a straight groove 140, which extends along the length of the cantilever 100 to the mounting plate 120. A first worm gear 420 is installed in the straight groove 140, and the first worm gear 420 can rotate in the straight groove 140. In addition, by installing the first worm gear 420 in the straight groove 140, a larger carbon film support 500 can be obtained within a limited space, which is more conducive to beam stripping and extraction.

[0048] In some specific embodiments, such as Figure 1 As shown, the mounting plate 120 is provided with a support platform 150 located in the mounting space 130. The support platform 150 is provided with a rotating hole orthogonal to the mounting plate 120, and the rotating hole communicates with the straight groove 140. Specifically, a transmission component 410 can be installed on the support platform 150. The linkage rod 411 in the transmission component 410 is adapted to the rotating hole, wherein the linkage rod 411 can rotate relative to the support platform 150.

[0049] In some specific embodiments, such as Figure 1 As shown, the target film assembly 200 is rotatably mounted on the mounting plate 120 and located in the mounting space 130. The target film assembly 200 is provided with a heat exchange channel for accommodating the cooling medium. Specifically, the cooling medium can flow through the heat exchange channel 231 to remove heat from the target film assembly 200, reduce the temperature of the target film assembly 200, and prevent the target film assembly 200 from deforming or being damaged due to excessive temperature.

[0050] In some specific embodiments, such as Figure 1As shown, the target film assembly 200 includes a rotating shaft 210, a target film turntable 220, and a first gear 230. Multiple carbon films can be mounted on the target film assembly 200, and the target film assembly 200 can drive the multiple carbon films to rotate. Under normal operation, the carbon films may be damaged. The target film assembly 200 can rotate to move other carbon films to the beam bombardment area, thereby replacing the previously damaged carbon films.

[0051] In some specific embodiments, such as Figures 1 to 5 As shown, the two ends of the rotating shaft 210 are rotatably mounted on two mounting plates 120, respectively. The rotating shaft 210 is orthogonal to the mounting plates 120. The target film turntable 220 is mounted on the rotating shaft 210 and is located in the mounting space 130. The target film turntable 220 can rotate on the free end 110 of the cantilever 100. The first gear 230 is mounted on the rotating shaft 210 and is connected to the target film turntable 220. By rotating the first gear 230, the target film turntable 220 can be driven to rotate.

[0052] In some specific embodiments, such as Figure 4 and Figure 5 As shown, the first gear 230 has a heat exchange channel 231 inside that accommodates the cooling medium. That is, the heat exchange channel 231 is located inside the first gear 230, and the cooling medium can flow in the heat exchange channel 231 to exchange heat with the first gear 230 and indirectly exchange heat with the target film rotating disk 220. In other words, the temperature of the first gear 230 and the target film rotating disk 220 can be effectively reduced, thereby reducing the temperature of the carbon film and preventing the first gear 230, the target film rotating disk 220 and the carbon film from being too hot, which could lead to deformation or damage and extend their service life.

[0053] In some specific embodiments, such as Figure 5 As shown, the heat exchange channel 231 can be circular in shape.

[0054] In some specific embodiments, such as Figure 1 and Figure 2 As shown, at least one carbon film holder 500 is mounted on the target film turntable 220. Specifically, the carbon film can be mounted on the target film turntable 220 via the carbon film holder 500.

[0055] In some specific embodiments, such as Figure 1 and Figure 2 As shown, the rotating assembly 400 includes a transmission member 410 and a first worm gear 420. Specifically, by rotating the first worm gear 420, the transmission member 410 is driven to rotate, thereby driving the target membrane assembly 400 to rotate.

[0056] In some specific embodiments, such as Figures 1 to 3As shown, the transmission component 410 includes a linkage rod 411, a second gear 412, and a worm gear 413. The second gear 412 and the worm gear 413 are respectively located at both ends of the linkage rod 411, and the linkage rod 411 is rotatably disposed in a rotating hole. The second gear 412 and the worm gear 413 are respectively located at both ends of the support platform 150. The worm gear 413 extends into the straight groove 140, and the second gear 412 meshes with the first gear 230. Specifically, the worm gear 413 meshes with the first worm 420. By rotating the first worm 420, the worm gear 413 is driven to rotate. The linkage rod 411, the second gear 412, and the worm gear 413 are a whole, that is, the worm gear 413 and the second gear 412 rotate synchronously, and the second gear 412 meshes with the first gear 230, thereby causing the first gear 230 to rotate. The first worm 420 can be rotated manually or by a motor.

[0057] In some specific embodiments, such as Figures 1 to 3 As shown, the first motor 430 is mounted on the cantilever 100, and the output shaft of the first motor 430 is connected to the first worm gear 420. Specifically, by controlling the rotation of the first motor 430, the rotation angle of the first worm gear 420 can be controlled, which indirectly controls the rotation angles of the worm wheel 413, the second gear 412, the first gear 230, and the target film turntable 220.

[0058] In some specific embodiments, such as Figures 1 to 4 As shown, the elastic component 300 includes a first heat exchange tube 310 and a second heat exchange tube 320 located in the mounting space 130. The inlet of the first heat exchange tube 310 is connected to the heat exchange channel 231, and the outlet of the second heat exchange tube 320 is connected to the heat exchange channel 231. Specifically, the cooling medium can enter the heat exchange channel 231 through the first heat exchange tube 310 and then flow out through the second heat exchange tube 320, thereby carrying away the heat from the target membrane component 200.

[0059] In some specific embodiments, such as Figures 1 to 4As shown, both the first heat exchange tube 310 and the second heat exchange tube 320 are spirally arranged around the center line of the rotating shaft 210. Both the first and second heat exchange tubes are elastic. The outlet of the first heat exchange tube 310 is connected to the mounting plate 120, and the inlet of the second heat exchange tube 320 is also connected to the mounting plate 120. That is, both the first and second heat exchange tubes 310 and 320 are connected between the first gear 230 and the mounting plate 120, which can convert the rotary seal into a static seal, greatly simplifying the design and manufacturing process and improving the reliability of the seal. Simultaneously, the spirally arranged first and second heat exchange tubes 310 and 320 can provide a certain torque to the first gear 230, thereby improving the repeatability of the transmission of the first gear 230. In addition, the first heat exchange tube 310 and the second heat exchange tube 320 can exchange heat with the first gear 230 and indirectly exchange heat with the target film rotating disk 220. That is, the temperature of the first gear 230 and the target film rotating disk 220 can be effectively reduced, thereby reducing the temperature of the carbon film and preventing the first gear 230, the target film rotating disk 220 and the carbon film from being deformed or damaged due to excessive temperature, thus extending the service life.

[0060] In some specific embodiments, such as Figures 1 to 4 As shown, the first heat exchange tube 310 is spirally arranged in a plane parallel to the mounting plate 120. That is, the first heat exchange tube 310 can have a function similar to a "spring", providing a certain torque to the first gear 230.

[0061] In some specific embodiments, such as Figures 1 to 4 As shown, the second heat exchange tube 320 is spirally arranged in a plane parallel to the mounting plate 120. The second heat exchange tube 320 can have a function similar to a "spring", providing a certain torque to the first gear 230.

[0062] In some specific embodiments, such as Figures 1 to 4 As shown, the spiral plane of the first heat exchange tube 310 and the spiral plane of the second heat exchange tube 320 are spaced apart, which can avoid interference between the first heat exchange tube 310 and the second heat exchange tube 320.

[0063] In some specific embodiments, such as Figures 1 to 4 As shown, multiple first heat exchange tubes 310 are provided, which can provide greater torque to the first gear 230. At the same time, multiple first heat exchange tubes 310 can also accelerate the flow of the cooling medium and improve the heat exchange efficiency of the cooling medium to the first gear 230. The spiral planes of adjacent first heat exchange tubes 310 are spaced apart to avoid interference between adjacent first heat exchange tubes 310.

[0064] In some specific embodiments, such as Figures 1 to 4As shown, multiple second heat exchange tubes 320 are provided, which can provide greater torque to the first gear 230. At the same time, the multiple second heat exchange tubes 320 can also accelerate the flow of the cooling medium and improve the heat exchange efficiency of the cooling medium to the first gear 230. The spiral planes of adjacent second heat exchange tubes 320 are spaced apart to avoid interference between adjacent second heat exchange tubes 320.

[0065] In some specific embodiments, the cyclotron system includes the aforementioned target stripping device 1000.

[0066] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0069] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0070] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0071] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A stripping target device for a cyclotron, characterized by, Comprising: a cantilever for extending into a vacuum chamber of a cyclotron, a free end of the cantilever extending into the vacuum chamber of the cyclotron has a mounting space, the free end of the cantilever has two mounting plates parallel to each other, the two mounting plates are arranged in a spaced manner, and the mounting space is defined between the two mounting plates; a target film assembly provided with a heat exchange channel for containing a cooling medium, the target film assembly is located in the mounting space and is rotatably arranged on the mounting plates; a heat exchange assembly comprising a first heat exchange pipe and a second heat exchange pipe in the mounting space, an inlet of the first heat exchange pipe is in communication with the heat exchange channel, and an outlet of the second heat exchange pipe is in communication with the heat exchange channel.

2. The stripping target device of the cyclotron according to claim 1, wherein the target film assembly comprises: a rotating shaft, both ends of the rotating shaft are rotatably mounted on the two mounting plates, and the rotating shaft is orthogonal to the mounting plates; a target film rotating disc, the target film rotating disc is mounted on the rotating shaft and located in the mounting space; a first gear, the first gear is mounted on the rotating shaft, the first gear is connected with the target film rotating disc, and the heat exchange channel is located in the first gear.

3. The stripping target device of the cyclotron according to claim 2, wherein the first heat exchange pipe and the second heat exchange pipe are both spirally arranged with the center line of the rotating shaft as an axis; the first heat exchange pipe has elasticity, and the second heat exchange pipe has elasticity; wherein an outlet of the first heat exchange pipe is connected to the mounting plate, and an inlet of the second heat exchange pipe is connected to the mounting plate.

4. The stripping target device of the cyclotron according to claim 1, wherein the first heat exchange pipe is spirally arranged in a plane parallel to the mounting plate; the second heat exchange pipe is spirally arranged in a plane parallel to the mounting plate.

5. The stripping target device of the cyclotron according to claim 3, wherein the spiral plane of the first heat exchange pipe and the spiral plane of the second heat exchange pipe are arranged in a spaced manner.

6. The stripping target device of the cyclotron according to claim 3, wherein the first heat exchange pipe is provided with a plurality of pipes, and the spiral planes of adjacent two first heat exchange pipes are arranged in a spaced manner; the second heat exchange pipe is provided with a plurality of pipes, and the spiral planes of adjacent two second heat exchange pipes are arranged in a spaced manner.

7. The stripping target device of a cyclotron according to claim 2, characterized by a straight slot is arranged on the cantilever and extends to the mounting plate in the length direction of the cantilever, a support table located in the mounting space is arranged on the mounting plate, a rotating hole orthogonal to the mounting plate is arranged on the support table, and the rotating hole is in communication with the straight slot; the stripping target device of the cyclotron further comprises a rotating assembly, the rotating assembly comprises: A transmission member, the transmission member comprising a linkage rod, a second gear and a worm gear, the second gear and the worm gear are respectively arranged at two ends of the linkage rod, and the linkage rod is rotatably arranged in the rotating hole, the second gear and the worm gear are respectively located at two ends of the support table, the worm gear extends into the straight slot, and the second gear is engaged with the first gear; A first worm, the first worm extends into the straight slot in the length direction of the cantilever, and the first worm is engaged with the worm gear; A first motor, the first motor is installed on the cantilever, and an output shaft of the first motor is connected with the first worm.

8. The ablating target device of a cyclotron of claim 2, wherein, Further comprising: At least one carbon film support, at least one of the carbon film supports is installed on the target film turntable.

9. A cyclotron system, characterized by, A stripping target device comprising the cyclotron according to any one of claims 1-8.

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