Double-sided cooling capsule target chamber and cyclotron

Abstract

The utility model discloses a double-sided cooling capsule target chamber and a cyclotron, comprising a capsule target sheet assembly, a bearing assembly, a target chamber head assembly and a target chamber tail assembly, the capsule target sheet assembly is circular; a groove part and a channel communicated with the groove part are formed in the bearing assembly, and a capsule target piece assembly is arranged in the groove part; a helium cooling channel and a water cooling channel are respectively arranged in the bearing component corresponding to the front surface and the back surface of the capsule target sheet component; the target chamber head assembly is fixed at one end of the bearing assembly, and the target chamber head assembly is provided with a leading-in part for leading an accelerator particle beam into the channel; the target chamber tail assembly is fixed to the other end of the bearing assembly. According to the utility model, a double-sided cooling effect of copper support surface water cooling and aluminum support surface gas cooling can be formed on the capsule target sheet assembly, and the use feasibility of target sheets made of materials with different heat-conducting properties is improved; the irradiation efficiency is improved, the manufacturing cost is reduced, and conveying and cooling are facilitated; and meanwhile, the treatment capacity of dissolution and separation of the irradiated target sheet can be reduced, and the post-treatment cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of target structure technology for accelerators, specifically to a double-sided cooled capsule target chamber and a cyclotron accelerator. Background Technology

[0002] Accelerators, as devices that use charged particles to initiate nuclear reactions to produce radionuclides, are the main source of radionuclides for radiopharmaceuticals. The accelerator target chamber is the key location where nuclear reactions occur, and its structure and performance directly affect the quality of the radionuclide product.

[0003] The Cycl One-30 proton cyclotron accelerator is a commonly used type of accelerator. Its capsule target chamber originally used a long, narrow metal target measuring 10 mm wide and 96 mm long, with a copper target holder. During irradiation, the beam direction formed a 6° angle with the target surface. After irradiation, the target chamber was transferred to a hot chamber via a pneumatic system for subsequent processing such as target melting and separation. The target to be irradiated was then transferred from the hot chamber to the irradiation site via the same pneumatic system.

[0004] However, in practical use at Cycl One-30, the elongated metal target presented problems. The beam irradiation area was typically concentrated in the center of the target sheet, making it difficult for the ends to be covered by the beam. This not only resulted in wasted energy from the accelerator beam irradiation but also increased the difficulty and separation cost of post-irradiation target processing. To address this issue, a coin target design was later adopted, using a smaller, coin-shaped target sheet supported by copper and aluminum support assemblies. This design improved the accelerator's irradiation efficiency and the quality of solid-state nuclides, while reducing the cost of producing radionuclides.

[0005] Although coin-shaped targets have solved the problems of low irradiation efficiency and separation difficulties of long strip metal targets to some extent, this design is not applicable to capsule targets with poor heat dissipation performance and high cooling requirements. Utility Model Content

[0006] In view of the shortcomings of the existing technology, this utility model provides a double-sided cooled capsule target chamber and a cyclotron accelerator.

[0007] This utility model discloses a double-sided cooled capsule target chamber, comprising:

[0008] A capsule target assembly, wherein the capsule target assembly is circular;

[0009] A support assembly has a recessed portion and a channel communicating with the recessed portion, and the capsule target assembly is installed in the recessed portion; a helium cooling channel and a water cooling channel are respectively provided in the support assembly corresponding to the front and back of the capsule target assembly.

[0010] A target chamber head assembly is fixed to one end of the support assembly, and the target chamber head assembly is provided with an inlet portion for guiding the accelerator particle beam into the channel;

[0011] The target chamber tail assembly is fixed to the other end of the support assembly.

[0012] As a further improvement of this utility model, the capsule target assembly includes a target window and a target piece, both of which are circular in structure;

[0013] The target plate is held within two target windows, each with a window corresponding to the position of the target plate; the accelerator particle beam delivered by the channel acts directly on the target plate through the windows.

[0014] As a further improvement of this utility model, the capsule target assembly includes a target window and a target piece, both of which are circular in structure;

[0015] The two target windows are recessed on opposite sides to form an inner cavity for mounting the target plate, which is then installed within the inner cavity; the accelerator particle beam delivered by the channel acts on the target plate after passing through the target windows.

[0016] As a further improvement of this utility model, the diameter of the target sheet is 29.4-30.6 mm and the thickness of the target sheet is 3.6-4.2 mm.

[0017] As a further improvement of this utility model, the supporting component is composed of an aluminum support and a copper support that are interlocked at the top and bottom.

[0018] The copper support has a first groove, and the capsule target assembly is installed in the first groove; the aluminum support has a second groove that mates with the first groove, and the first groove and the second groove constitute the groove portion; the aluminum support has a channel at one end near the target chamber head assembly, and a thin film is disposed inside the channel at one end near the target chamber head assembly; the inlet portion communicates with the groove portion through the channel;

[0019] The aluminum tray is provided with the helium cooling channel, and the copper tray is provided with the water cooling channel.

[0020] As a further improvement of this utility model, the helium cooling channel includes an inlet, an outlet, a helium inlet passage, and a helium outlet passage.

[0021] The air inlet and air outlet are located on the outer end face of the aluminum support. The air inlet is connected to the channel through the helium gas inlet passage, and the air outlet is connected to the second groove through the helium gas outlet passage.

[0022] As a further improvement of this utility model, the water cooling channel includes an inlet connector, an outlet connector, an inlet pipe, and an outlet pipe;

[0023] The inlet connector and the outlet connector are respectively located on both sides of the outer end face of the copper support. The inlet connector is connected to the first groove through the inlet pipe, and the outlet connector is connected to the first groove through the outlet pipe.

[0024] As a further improvement of this utility model, the film includes a hawar film, a titanium film, an aluminum film, or a molybdenum film;

[0025] The film has a thickness of 10-50 μm and a diameter of 25-35 mm.

[0026] As a further improvement of this utility model, the target chamber head assembly includes a target chamber head, a first pressing plate, and a first pressing plate felt. The target chamber head is connected to the bearing assembly in sequence through the first pressing plate and the first pressing plate felt. The target chamber head, the first pressing plate, and the first pressing plate felt are provided with through holes corresponding to the channel positions, and the through holes constitute the inlet portion.

[0027] The target chamber tail assembly includes a target chamber tail, a second pressure plate, and a second pressure plate felt. The target chamber tail is connected to the support assembly in sequence through the second pressure plate and the second pressure plate felt.

[0028] This utility model also discloses a cyclotron accelerator, including the aforementioned double-sided cooled capsule target chamber.

[0029] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0030] This invention provides a double-sided cooling capsule target chamber. By setting helium cooling channels and water cooling channels in the supporting components of the capsule target chamber, a double-sided cooling effect of water cooling on the copper support surface and gas cooling on the aluminum support surface can be formed on the capsule target assembly, increasing the feasibility of using target plates made of materials with different thermal conductivity.

[0031] This invention provides a double-sided cooled capsule target chamber, which is assembled and installed at both ends of a support assembly by a target chamber head assembly and a target chamber tail assembly to form a target chamber structure. The support assembly has grooves inside for mounting the capsule target assembly. The capsule target assembly has a circular structure, which allows the accelerator beam to effectively cover the entire target area, improving irradiation efficiency. The target area is small, reducing manufacturing costs, allowing for more diverse target forms, and facilitating transport and cooling. The amount of target post-processing is reduced, which can reduce the amount of dissolution and separation of the target after irradiation, reduce post-processing costs, and reduce the amount of radioactive waste and chemical treatment waste generated.

[0032] This invention relates to a cyclotron accelerator that uses the aforementioned double-sided cooled capsule target chamber, which can improve the accelerator's irradiation efficiency, reduce the cost of target fabrication and post-processing, and thus reduce the cost of producing radionuclides using the accelerator. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a double-sided cooling capsule target chamber disclosed in one embodiment of the present invention;

[0034] Figure 2 This is a side sectional view of the structure of a double-sided cooling capsule target chamber disclosed in one embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the capsule target assembly structure of a double-sided cooled capsule target chamber disclosed in one embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the helium cooling channel of the double-sided cooling capsule target chamber disclosed in one embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the water-cooling channel for a double-sided cooled capsule target chamber, as disclosed in one embodiment of the present invention.

[0038] Figure 6 This is a schematic diagram of the capsule target assembly structure of a double-sided cooled capsule target chamber disclosed in another embodiment of the present invention.

[0039] Figure 7 This is a side sectional view of the capsule target assembly structure of the double-sided cooled capsule target chamber disclosed in another embodiment of the present invention.

[0040] In the picture:

[0041] 1. Capsule target assembly; 11. Target window; 111. Window; 12. Target piece; 2. Support assembly; 21. Aluminum support; 211. Second groove; 212. Channel; 22. Copper support; 221. First groove; 3. Target chamber head assembly; 31. Target chamber head; 32. First tablet press; 33. First tablet press felt; 34. Through hole; 4. Target chamber tail assembly; 41. Target chamber tail; 42. Second tablet press; 43. Second tablet press felt; 51. Air inlet; 52. Air outlet; 53. Helium inlet gas path; 54. Helium outlet gas path; 61. Water inlet connector; 62. Water outlet connector; 63. Water inlet pipe; 64. Water outlet pipe. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] The present invention will now be described in further detail with reference to the accompanying drawings:

[0046] like Figure 1-2 As shown, a double-sided cooled capsule target chamber according to the present invention includes a capsule target assembly 1, a support assembly 2, a target chamber head assembly 3, and a target chamber tail assembly 4. The capsule target assembly 1 is circular. The support assembly 2 has a groove and a channel 212 connected to the groove, and the capsule target assembly 1 is installed in the groove. The support assembly 2 has a helium cooling channel and a water cooling channel respectively provided on the front and back of the capsule target assembly 1. The target chamber head assembly 3 is fixed to one end of the support assembly 2 and has an inlet portion for guiding the accelerator particle beam into the channel 212. The target chamber tail assembly 4 is fixed to the other end of the support assembly 2.

[0047] Specifically:

[0048] like Figure 3As shown, the capsule target assembly 1 includes a target window 11 and a target plate 12, both of which are circular. The target plate 12 is held within two target windows 11, and each of the two target windows 11 has a window 111 corresponding to the position of the target plate 12, allowing the target plate 12 to directly contact the accelerator particle beam. The accelerator particle beam transported by the channel 212 acts directly on the target plate 12 through the window 111.

[0049] In the above embodiments, preferably, the target window 11 is made of a metallic material, including niobium, aluminum or copper.

[0050] In the above embodiments, preferably, the target sheet 12 can be a thin layer, powder or liquid metal. The method of manufacturing the target sheet 12 includes forming it by pressing powder or sealing liquid metal, forming a coating on the surface of the target holder by electroplating the target material, or forming a thin sheet by pressing a separate target material.

[0051] In the above embodiments, preferably, depending on the requirements for producing different radionuclides, the target sheet 12 can be made of natural gallium, enriched calcium, etc. 44 Ca], enriched nickel 64 Ni] and natural yttrium and other metals are used to produce 68 Ge 44 Sc、 64 Cu and 89 Zr.

[0052] In the above embodiments, preferably, the target sheet 12 can be in various forms such as electroplated coating, metal sheet, or capsule target sheet.

[0053] In the above embodiments, preferably, the diameter of the target plate 12 is 29.4-30.6 mm, and the thickness of the target plate 12 is 3.6-4.2 mm. In actual production, target windows 11 can be designed and manufactured to match target plates 12 of different sizes.

[0054] In the above embodiments, preferably, the target plate 12 is tilted at an angle of 25° to the beam. The target plate 12 can be in a solid or liquid state. Liquid metal is required to have a vapor pressure that is less affected by temperature changes, and the liquid metal also has a small volume change when a nuclear reaction occurs.

[0055] like Figure 2As shown, in the above embodiment, preferably, the supporting component 2 is composed of an aluminum support 21 and a copper support 22 that are interlocked. The copper support 22 is provided with a first groove 221, and the capsule target assembly 1 is installed in the first groove 221. The aluminum support 21 is provided with a second groove 211 that cooperates with the first groove 221. The first groove 221 and the second groove 211 constitute a groove portion. The end of the aluminum support 22 near the target chamber head assembly 3 is provided with a channel 212, and the inlet portion communicates with the groove portion through the channel 212. In this embodiment, a helium cooling channel is provided in the aluminum support 21, and a water cooling channel is provided in the copper support 22.

[0056] In the above embodiments, preferably, a thin film is disposed inside the end of the channel 212 near the target chamber head assembly 1. The thin film is made of materials including a halogen membrane, a titanium membrane, an aluminum membrane, or a molybdenum membrane, and has a thickness of 10-50 μm and a diameter of 25-35 mm. In this embodiment, the thin film is preferably a titanium membrane.

[0057] In the above embodiments, preferably, the thin film is arranged to form a vacuum cavity between the capsule target chamber and the helium cooling channel, so as to isolate the vacuum outside the capsule target chamber and the accelerator pipeline.

[0058] like Figure 4 As shown, in the above embodiment, preferably, the helium cooling channel includes an inlet 51, an outlet 52, a helium inlet passage 53, and a helium outlet passage 54. The inlet 51 and the outlet 52 are disposed on the outer end face of the aluminum support 21. The inlet 51 is connected to the channel through the helium inlet passage 53, and the outlet 52 is connected to the second groove 211 through the helium outlet passage 54. In this embodiment, helium is input into the helium inlet passage 53 through the inlet 51. Then, the helium is transported to the titanium film of the channel 212 through the helium inlet passage 53, and after being reflected by the titanium film, it flows back into the second groove 211 to cool the front side of the target 12 of the capsule target assembly 1. Then, it is transported to the outlet 52 through the helium outlet passage 54 connected to the second groove 211, and discharged through the outlet 52, thereby achieving cooling of the front side of the capsule target assembly 1.

[0059] like Figure 5As shown, in the above embodiment, preferably, the water cooling channel includes an inlet connector 61, an outlet connector 62, an inlet pipe 63, and an outlet pipe 64; wherein, the inlet connector 61 and the outlet connector 62 are respectively disposed on both sides of the outer end face of the copper support 22, the inlet connector 61 is connected to the first groove 221 through the inlet pipe 63, and the outlet connector 62 is connected to the first groove 221 through the outlet pipe 64. In this embodiment, cooling water is input into the inlet pipe 63 through the inlet connector 61, and then the cooling water is transported to the first groove 221 through the inlet pipe 63 to cool the back side of the target 12 of the capsule target assembly 1, and then transported to the outlet connector 62 through the outlet pipe 64 connected to the first groove 221, and discharged through the outlet connector 62, thereby realizing the cooling and temperature reduction of the back side of the capsule target assembly 1.

[0060] In actual use, when irradiation begins, the water inlet connector 61 and the water outlet connector 62 are connected to the water cooling system of the accelerator respectively, and the circulating cooling water is introduced into the cyclotron target chamber to cool the capsule target assembly 1.

[0061] In the above embodiments, preferably, the target chamber head assembly 3 includes a target chamber head 31, a first pressing plate 32, and a first pressing plate felt 33, wherein the target chamber head 31 is connected to the support assembly 1 in sequence through the first pressing plate 32 and the first pressing plate felt 33; the target chamber head 31, the first pressing plate 32, and the first pressing plate felt 33 are provided with through holes 34 at the corresponding positions of the channel 212, and the through holes 34 constitute an inlet portion; the target chamber tail assembly 4 includes a target chamber tail 41, a second pressing plate 42, and a second pressing plate felt 43, wherein the target chamber tail 41 is connected to the support assembly 1 in sequence through the second pressing plate 42 and the second pressing plate felt 43.

[0062] In the above embodiment, preferably, the through hole 34 is tapered at one end near the target chamber head 31. This tapered hole is connected to the accelerator beam exit end to form a vacuum. This vacuum state can minimize beam loss, and the beam irradiates the capsule target assembly 1 through the through hole 34 and channel 212.

[0063] In the above embodiments, preferably, the target chamber head assembly 3 serves as the accelerator particle beam inlet section, while simultaneously sealing the target chamber head 31 to facilitate the transmission of the target chamber in the pipeline and protect the target system. The target chamber head 31 is made of impact-resistant and radiation-resistant material, preferably nylon. The first pressure plate 32 and the first pressure plate felt 33 serve to seal the target chamber head 31. The first pressure plate 32 is made of a material with excellent mechanical properties and thermal stability, preferably polysulfone. The first pressure plate felt 33 is made of a strong and non-deformable fabric, preferably wool felt.

[0064] In the above embodiment, preferably, the target chamber tail assembly 4 seals the target chamber tail 41 to facilitate the transmission of the target chamber in the pipeline, while simultaneously buffering the impact force of the target chamber landing. The target chamber tail 41, the second pressure plate 42, and the second pressure plate felt 43 of the target chamber tail assembly 4 are made of the same materials as the target chamber head assembly 3 described above, and will not be described again here.

[0065] In the above embodiments, preferably, the angle between the first groove 221 and the horizontal direction is between 20° and 40°. Preferably, the angle between the first groove 221 and the horizontal direction is 25°, then the angle between the capsule target assembly 1 and the horizontal direction is also 25°, that is, the tilt angle with the beam is increased from 6° in the prior art to 25°.

[0066] The above embodiments have the following beneficial effects:

[0067] 1) By providing a double-sided cooling capsule target chamber, and by setting a helium cooling channel and a water cooling channel in the carrier component 2 of the capsule target chamber, a double-sided cooling effect of water cooling on the copper support 22 side and gas cooling on the aluminum support 21 side can be formed on the capsule target component 1, which increases the feasibility of using target plates of different thermal conductivity materials and expands the range of energy and beam current used by the target plate.

[0068] 2) The accelerator particle beam can effectively cover the entire target area, improving irradiation efficiency. At the same time, the target area is greatly reduced, which allows the beam to be more concentrated while ensuring cooling efficiency. The entire target area can be effectively irradiated by the beam and undergo nuclear reactions, thereby improving irradiation efficiency.

[0069] 3) The solid target materials used for accelerators to produce radionuclides are mostly expensive heavy metals. Reducing the target area can significantly reduce the manufacturing cost. At the same time, due to the small target area, the target is easier to manufacture and can be made into various forms such as electroplated coatings, metal sheets, and capsule-shaped targets.

[0070] 4) After significantly reducing the target area, the target volume is also significantly reduced. When remotely and automatically controlling the target, operations such as transferring the target to the irradiation station, cooling with cooling water during irradiation, and transferring it out of the irradiation station after irradiation will be simpler and the accuracy of the operation will be improved.

[0071] 5) The reduced amount of target sheet post-processing can decrease the amount of dissolution and separation of the target sheet after irradiation, thereby reducing post-processing costs and the generation of radioactive waste and chemical treatment waste.

[0072] 6) Capsule targets can take various forms, such as coated, metal sheets, and metal / liquid capsule targets. At the same time, the target chamber is suitable for most solid targets used in accelerators to produce nuclides, such as 89Zr and 68Ga nuclides; it is also suitable for nuclides produced by liquid metal targets, such as 68Ge nuclides, and has a wide range of applications.

[0073] 7) The double-sided cooled capsule target chamber can monitor the radioactivity changes in the pipeline during the irradiation process by counting the radioactivity at the helium pump, thus avoiding safety accidents such as radioactive contamination. On the other hand, it can sample and detect the types of radionuclides, thereby judging the nuclear reactions produced by the target sheet during the irradiation process, and thus playing a feedback role in optimizing the target preparation and irradiation processes of accelerator nuclides.

[0074] like Figure 6-7 As shown, the capsule target assembly 1 disclosed in the second embodiment of this utility model includes: a target window 11 and a target plate 12; wherein, both the target window 11 and the target plate 12 are circular; the opposite sides of the two target windows 11 are recessed to form an inner cavity for mounting the target plate 12, and the target plate 12 is mounted in the inner cavity, that is, the target plate 12 is completely enclosed within the two target windows 11. In this embodiment, the material, size, and form of the target plate 12 and the target window 11 are consistent with those of the first embodiment, and will not be described again here. In this embodiment, the accelerator particle beam transported by the channel 212 acts on the target plate 12 after passing through the target window 11.

[0075] According to the present invention, a cyclotron includes the above-mentioned double-sided cooled capsule target chamber.

[0076] In this embodiment, using the aforementioned double-sided cooled capsule target chamber can improve the irradiation efficiency of the accelerator, reduce the cost of target fabrication and post-processing, and thus reduce the cost of producing radionuclides by the accelerator.

[0077] In this embodiment, preferably, the manufacturing and usage methods of the double-sided cooled capsule target chamber and cyclotron based on the above embodiments are as follows:

[0078] 1) Target fabrication

[0079] The target material is made into a circular capsule target 12 using a variety of methods such as powder pressing, liquid encapsulation molding, electroplating, and metal sheet cutting.

[0080] 2) Loading the target sheet

[0081] A circular capsule target piece is fixed in the space formed by assembling two target windows 11 to form a capsule target piece assembly 1. The capsule target piece assembly 1 is fixed to the first groove 221 of the copper support 22 with screws, and an aluminum support 21 is placed on top of it. The target chamber head 31 and the target chamber tail 41 are mechanically installed to the head and tail of the support assembly 2 by means of a pressing plate and a pressing felt, respectively.

[0082] 3) Target chamber transfer steps

[0083] The cyclotron's transmission system creates negative pressure to transfer the target chamber from the receiving station to the irradiation station. The irradiation station uses two cylinders to fix the position of the target chamber's tail assembly 4 and perform sealing clamping. A helium pump connected to the aluminum support 21 introduces helium gas into the target chamber to cool the front of the capsule target assembly 1 after reflection from the titanium film. The cyclotron's water carrier is connected to the copper support 22's inlet and outlet connectors 61 and 62, introducing circulating cooling water into the target chamber to cool the back of the capsule target assembly 1.

[0084] 4) Irradiation target chamber

[0085] The through-hole 34 of the target chamber head assembly 3 is tightly connected to the accelerator beam extraction end to form a vacuum, which minimizes beam loss. After passing the vacuum test and water circuit sealing test, the particle beam enters the target chamber and undergoes a nuclear reaction with the target sheet.

[0086] 5) Unloading the target chip

[0087] After irradiation, the cyclotron transport system creates negative pressure to transfer the target chamber from the irradiation station to the receiving station. Once the radioactivity has decayed to a safe operating level, the target chamber is opened, the target sheet is unloaded, and post-processing steps are performed.

[0088] Example 1:

[0089] 1) Target fabrication

[0090] 1-3g of natural gallium is encapsulated in target window 11 and assembled into capsule target assembly 1.

[0091] 2) Loading the target sheet

[0092] The natural gallium capsule target assembly is fixed to the first groove 221 of the copper support 22 with screws, and an aluminum support 21 is placed on top of it. The target chamber head 31 and the target chamber tail 41 are mechanically installed to the head and tail of the support assembly 1 by the first pressing plate 32, the first pressing plate felt 33, the second pressing plate 42, and the second pressing plate felt 43, respectively.

[0093] 3) Target chamber transfer steps

[0094] The cyclotron transmission system creates negative pressure to transfer the gallium target chamber from the receiving station to the irradiation station. The irradiation station uses two cylinders to fix the position of the gallium target chamber's tail assembly and perform sealing clamping functions. The water carrier of the cyclotron connects the inlet connector 61 and outlet connector 62 of the copper support 22, introducing circulating cooling water into the gallium target chamber to cool the capsule target assembly 1.

[0095] 4) Irradiation target chamber

[0096] The through-hole 34 of the gallium target chamber head assembly is tightly connected to the accelerator beam extraction end to form a vacuum. After the vacuum degree test and water circuit sealing test are passed, the gallium target chamber is irradiated for 1-300 hours with a proton energy of 20-30MeV and a beam intensity of 10-200μA.

[0097] 5) Unloading the target chip

[0098] After irradiation, the cyclotron transport system creates negative pressure to transfer the target chamber from the irradiation station to the receiving station. The gallium target chamber is then left to decay its radioactivity to a safe operating level for 14-30 days before the target sheet is unloaded for post-processing steps.

[0099] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A double-sided cooled capsule target chamber, characterized in that, include: A capsule target assembly, wherein the capsule target assembly is circular; A support assembly has a recessed portion and a channel communicating with the recessed portion, and the capsule target assembly is installed in the recessed portion; a helium cooling channel and a water cooling channel are respectively provided in the support assembly corresponding to the front and back of the capsule target assembly. A target chamber head assembly is fixed to one end of the support assembly, and the target chamber head assembly is provided with an inlet portion for guiding the accelerator particle beam into the channel; The target chamber tail assembly is fixed to the other end of the support assembly.

2. The double-sided cooled capsule target chamber according to claim 1, characterized in that, The capsule target assembly includes a target window and a target piece, both of which are circular in shape. The target plate is held within two target windows, each with a window corresponding to the position of the target plate; the accelerator particle beam delivered by the channel acts directly on the target plate through the windows.

3. The double-sided cooled capsule target chamber according to claim 1, characterized in that, The capsule target assembly includes a target window and a target piece, both of which are circular in shape. The two target windows are recessed on opposite sides to form an inner cavity for mounting the target plate, which is then installed within the inner cavity; the accelerator particle beam delivered by the channel acts on the target plate after passing through the target windows.

4. The double-sided cooled capsule target chamber according to claim 2 or 3, characterized in that, The target sheet has a diameter of 29.4-30.6 mm and a thickness of 3.6-4.2 mm.

5. The double-sided cooled capsule target chamber according to claim 1, characterized in that, The load-bearing component is composed of an aluminum support and a copper support that are interlocked at the top and bottom. The copper support has a first groove, and the capsule target assembly is installed in the first groove; the aluminum support has a second groove that mates with the first groove, and the first groove and the second groove constitute the groove portion; the aluminum support has a channel at one end near the target chamber head assembly, and a thin film is disposed inside the channel at one end near the target chamber head assembly; the inlet portion communicates with the groove portion through the channel; The aluminum tray is provided with the helium cooling channel, and the copper tray is provided with the water cooling channel.

6. The double-sided cooled capsule target chamber according to claim 5, characterized in that, The helium cooling channel includes an inlet, an outlet, a helium inlet passage, and a helium outlet passage; The air inlet and air outlet are located on the outer end face of the aluminum support. The air inlet is connected to the channel through the helium gas inlet passage, and the air outlet is connected to the second groove through the helium gas outlet passage.

7. The double-sided cooled capsule target chamber according to claim 5, characterized in that, The water-cooling channel includes an inlet connector, an outlet connector, an inlet pipe, and an outlet pipe; The inlet connector and the outlet connector are respectively located on both sides of the outer end face of the copper support. The inlet connector is connected to the first groove through the inlet pipe, and the outlet connector is connected to the first groove through the outlet pipe.

8. The double-sided cooled capsule target chamber according to claim 5, characterized in that, The thin film includes a hawarp film, a titanium film, an aluminum film, or a molybdenum film; The film has a thickness of 10-50 μm and a diameter of 25-35 mm.

9. The double-sided cooled capsule target chamber according to claim 1, characterized in that, The target chamber head assembly includes a target chamber head, a first pressing plate, and a first pressing plate felt. The target chamber head is connected to the bearing assembly in sequence through the first pressing plate and the first pressing plate felt. The target chamber head, the first pressing plate, and the first pressing plate felt are provided with through holes corresponding to the channel positions, and the through holes constitute the inlet portion. The target chamber tail assembly includes a target chamber tail, a second pressure plate, and a second pressure plate felt. The target chamber tail is connected to the support assembly in sequence through the second pressure plate and the second pressure plate felt.

10. A cyclotron, characterized in that, include: The double-sided cooled capsule target chamber according to any one of claims 1-9.

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