Solid target device for isotope production

Abstract

The invention relates to the technical field of isotope production, in particular to a solid target device for isotope production, and aims to solve the problems that proton beam energy is reduced and the productivity of isotope Mo99 and isotope Tc99m is reduced as proton beams of an existing solid target device for isotope production need to penetrate through a water wall to irradiate a second Mo100 target sheet. In order to achieve the purpose, the solid-state target device comprises an accelerator, an operation box, a first target piece, a second target piece and a water cooling mechanism, the first target sheet and the second target sheet are arranged in the operation box; the water cooling mechanism comprises a water cooling cavity, a plurality of radiators and a water supply assembly; a water wall is formed in the water cooling cavity, and the multiple radiators are installed in the water cooling cavity at equal intervals. According to the solid target device for isotope production, a plurality of radiators are arranged, proton beams penetrating through the radiators do not need to penetrate through a water wall, energy loss of the proton beams is avoided, and the productivity of isotope Mo99 and isotope Tc99m is improved.

Description

Technical Field

[0001] This invention relates to the field of isotope production technology, specifically providing a solid target device for isotope production. Background Technology

[0002] Existing solid-state target devices for isotope production typically use an accelerator to provide a proton beam. This proton beam irradiates the first Mo100 target sheet of the solid-state target device for 60 hours to produce the isotope Mo99. The proton beam also needs to simultaneously irradiate the second Mo100 target sheet of the target device for 6 hours to produce the isotope Tc99m. During the above irradiation process, a water-cooling system is required to cool the proton beam in order to produce the isotopes Mo99 and Tc99m.

[0003] Existing cooling systems employ both water cooling and air cooling. Air cooling is less effective than water cooling, and its beam temperature cannot be too high; therefore, water cooling is more commonly used. A water-cooled cavity is placed between the first and second Mo100 target sheets. Cold water enters and fills the cavity to form a water wall. The proton beam must pass through this water wall to irradiate the second Mo100 target sheet, thus reducing the proton beam energy and consequently decreasing the production capacity of the isotopes Mo99 and Tc99m.

[0004] Accordingly, there is a need in the field for a new solid-state target device for isotope production to address the above-mentioned problems. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problem, namely, to solve the problem that the proton beam of the existing solid target device for isotope production needs to pass through a water wall to irradiate the second Mo100 target, which causes the proton beam energy to be reduced, and thus reduces the production capacity of isotopes Mo99 and Tc99m.

[0006] This invention provides a solid-state target apparatus for isotope production. The solid-state target apparatus includes an accelerator, an operating chamber, a first target plate, a second target plate, and a water-cooling mechanism. The accelerator generates a proton beam. The first and second target plates are arranged side-by-side inside the operating chamber so that they are irradiated by the proton beam in a linear manner to produce isotopes. The water-cooling mechanism includes a water-cooling cavity, multiple radiators, and a water supply assembly. The water-cooling cavity is formed inside the operating chamber and located between the first and second target plates. The water supply assembly communicates with the water-cooling cavity to continuously supply cold water to the water-cooling cavity, filling the interior of the water-cooling cavity to form a water wall. The multiple radiators are installed inside the water-cooling cavity and are arranged perpendicular to the first and second target plates so that the proton beam passing through the interior of the radiators does not need to pass through the water wall, thereby avoiding energy loss of the proton beam.

[0007] In the preferred embodiment of the above-mentioned solid target device for isotope production, the water-cooling cavity includes a first metal plate, a second metal plate, a water-cooling cavity inlet, and a water-cooling cavity outlet; the first metal plate is fixed to one side of the inside of the operating box and is arranged in the radial direction of the operating box.

[0008] The second metal plate is fixed to the other side of the inside of the operating box and is arranged in the radial direction of the operating box; the water-cooling cavity inlet is opened in the upper part of the operating box and is located between the first metal plate and the second metal plate; the water-cooling cavity outlet is opened in the lower part of the operating box and is located between the first metal plate and the second metal plate.

[0009] In the preferred embodiment of the above-mentioned isotope production solid target device, the heat sink includes a cylinder and a plurality of fins; the cylinder is arranged in the axial direction of the operating box, and one end of the cylinder is fixedly connected to the first metal plate, and the other end of the cylinder is fixedly connected to the second metal plate; the plurality of fins are equidistantly arranged on the outside of the cylinder to increase cooling efficiency; wherein, the proton beam passing through the inside of the cylinder does not need to pass through the water wall to avoid energy loss of the proton beam.

[0010] In the preferred embodiment of the above-mentioned isotope production solid target device, the water supply assembly includes a first flow channel pipe, a second flow channel pipe, and a deionized water circulation cooling system; one end of the first flow channel pipe is connected to the inlet of the water-cooled cavity, and the other end of the first flow channel pipe is connected to the outlet of the deionized water circulation cooling system; one end of the second flow channel pipe is connected to the outlet of the water-cooled cavity, and the other end of the first flow channel pipe is connected to the inlet of the deionized water circulation cooling system, so as to circulate the cold water.

[0011] In the preferred embodiment of the above-mentioned solid target device for isotope production, the operating box and the accelerator are adjacent and coaxially arranged. The operating box includes a first target cavity and a second target cavity. The first target cavity is located between the first metal plate and one end of the operating box. The first target cavity is used to place the first target piece, and the first target piece is attached to the first metal plate. The second target cavity is located between the second metal plate and the other end of the operating box. The second target cavity is used to place the second target piece, and the second target piece is attached to the second metal plate.

[0012] In the preferred embodiment of the above-mentioned solid target device for isotope production, the solid target device further includes a target changing unit. The target changing unit includes a first target plate in / out structure, a second target plate in / out structure, a first driving mechanism, a second driving mechanism, a first target plate supply unit, and a second target plate supply unit. The first target plate supply unit is located on one side of the upper part of the operating box and corresponds to and communicates with the first target cavity. The first target plate supply unit contains multiple spare first target plates and is used to supply the first target plate to the first target cavity. The second target plate supply unit is located on the other side of the upper part of the operating box and corresponds to the second target cavity. Furthermore, the second target supply unit is connected to the second target cavity, which is equipped with multiple spare second target pieces. The second target supply unit is used to supply the second target pieces to the second target cavity. The first target piece in / out structure is opened on the operation box. The second target piece in / out structure is opened on the operation box. The first drive mechanism is installed inside the first target cavity. The first drive mechanism is used to drive the spare first target piece to a designated position and drive the first target piece out. The second drive mechanism is installed inside the second target cavity. The second drive mechanism is used to drive the spare second target piece to a designated position and drive the second target piece out.

[0013] In the preferred embodiment of the above-mentioned solid target device for isotope production, the first target supply unit and the second target supply unit have the same structure. The first target supply unit includes a first target box and a first driving device. The first target box is disposed on the upper side of the housing and corresponds to the first target cavity. The lower part of the first target box is provided with a first target box outlet. The first driving device is installed inside the first target box and away from the first target box outlet. A plurality of spare first target pieces are located in front of the first driving device and close to the first target box outlet, so that the first driving device pushes the plurality of spare first target pieces toward the first target box outlet, so that a spare first target piece adjacent to the first target box outlet enters the first target cavity from the first target box outlet.

[0014] In the preferred embodiment of the above-mentioned solid target device for isotope production, the first target plate entry / exit structure and the second target plate entry / exit structure are identical; the first target plate entry / exit structure includes a first target plate inlet and a first target plate outlet; the first target plate inlet is located at the upper part of the operating box and is close to the side of the water-cooled cavity inlet; the first target plate outlet is located at the lower part of the operating box and is adjacent to the side of the water-cooled cavity outlet; wherein, the first target plate inlet and the first target box outlet are coaxially arranged so that the spare first target plate can enter the first target cavity.

[0015] In the preferred embodiment of the above-mentioned solid target device for isotope production, the first driving mechanism and the second driving mechanism have the same structure; the first driving mechanism includes a first power unit, a second power unit, a first plate, and a second plate; the first power unit is disposed in the upper part of the first target cavity and is fixedly connected to the operation box; the second power unit is disposed in the lower part of the second target cavity and is fixedly connected to the operation box; the first plate is horizontally disposed in the upper part of the first target cavity, the upper surface of the first plate is slidably connected to the inner wall of the operation box, one end of the first plate is connected to the first power unit, and the other end of the first plate has a first plate protrusion; the second plate is horizontally disposed in the lower part of the first target cavity, the lower surface of the second plate is slidably connected to the inner wall of the operation box, one end of the second plate is connected to the second power unit, and the other end of the second plate has a second plate protrusion.

[0016] Wherein, the front ends of the second plate body protrusion and the first plate body protrusion are coaxially arranged, and the rear ends of the second plate body protrusion and the first plate body protrusion are coaxially arranged.

[0017] When the spare first target plate enters the first target cavity: the lower end of the spare first target plate rests on the protruding edge of the second plate, and the upper end of the spare first target plate rests on the front end of the protruding edge of the first plate, so that the first power unit and the second power unit synchronously drive the first plate and the second plate to move toward the first metal plate, so as to attach the spare first target plate and the first metal plate together, so that the spare first target plate forms the first target plate that can be irradiated by the proton beam.

[0018] When the first target piece is discharged from the first target cavity: the second power unit drives the second plate away from the first metal plate, so that the lower end of the first target piece enters the first target piece outlet and is discharged.

[0019] In the preferred embodiment of the above-mentioned solid target device for isotope production, the solid target device further includes a first target dissolution system and a second target dissolution system with identical structures. The first target dissolution system is connected to the first target cavity, and the second target dissolution system is connected to the second target cavity. The first target dissolution system includes a first target outlet pipe and a first target dissolution tank. One end of the first target outlet pipe is connected to the first target outlet, and the other end of the first target outlet pipe is connected to the inlet of the first target dissolution tank, so that the first target enters the first target dissolution tank. The solid target device further includes a vacuum system, which is connected to the first target cavity and the second target cavity respectively.

[0020] With the above technical solution adopted, the solid target device for isotope production of this application can improve the production capacity of isotopes Mo99 and Tc99m by arranging multiple heat sinks in the water-cooled cavity in a manner perpendicular to the first and second target plates. The proton beam passing through the heat sink does not need to pass through the water wall, thus avoiding the energy loss of the proton beam.

[0021] Furthermore, the isotope production solid target apparatus of the present invention also includes a target changing unit, which includes a first target plate entry / exit structure, a second target plate entry / exit structure, a first driving mechanism, a second driving mechanism, a first target plate supply unit, and a second target plate supply unit. By setting up the target changing unit, the target plates can be replaced using the gravity of the first and second target plates themselves, which is convenient and quick. Attached Figure Description

[0022] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0023] Figure 1 This is a side perspective view of the irradiation state of an isotope production solid target device according to the present invention.

[0024] Figure 2 This is a side perspective view of the first and second spare target plates of an isotope production solid target apparatus of the present invention entering the operation box;

[0025] Figure 3 This is a schematic diagram of the heat sink structure of an isotope production solid target device according to the present invention;

[0026] Figure 4 This is a perspective view of the control box of an isotope production solid target apparatus according to the present invention.

[0027] 1. Accelerator;

[0028] 2. Control box; 21. First target cavity; 22. Second target cavity;

[0029] 3. First target plate;

[0030] 4. Second target plate;

[0031] 5. Water cooling mechanism; 51. Water cooling cavity; 52. Radiator; 53. Water supply assembly; 511. First metal plate; 512. Second metal plate; 513. Water cooling cavity inlet; 514. Water cooling cavity outlet; 521. Cylinder; 522. Fins; 531. First flow channel pipe; 532. Second flow channel pipe; 533. Deionized water circulation cooling system;

[0032] 6. Target changing unit; 61. First target plate entry / exit structure; 62. Second target plate entry / exit structure; 63. First drive mechanism; 64. Second drive mechanism; 65. First target plate supply unit; 66. Second target plate supply unit;

[0033] 611. First target inlet; 612. First target outlet; 631. First power unit; 632. Second power unit; 633. First plate; 634. Second plate; 635. First plate flange; 636. Second plate flange; 637. Front end of the first plate flange; 638. Rear end of the second plate flange; 651. Spare first target; 652. First target box; 653. First drive device; 654. First target box outlet; 661. Spare second target;

[0034] 7. First target dissolution system; 71. First target outlet pipe; 72. First target dissolution tank;

[0035] 8. Second target dissolution system;

[0036] 9. Vacuum system. Detailed Implementation

[0037] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the isotope production solid target apparatus of the present invention and are not intended to limit the scope of protection of the present invention.

[0038] It should be noted that in the description of this invention, terms such as "upper," "lower," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set" and "connection" 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 direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] The following is combined Figure 1 , Figure 2 , Figure 3 and Figure 4 The solid target apparatus for isotope production of this application is described.

[0041] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This application provides a solid-state target apparatus for isotope production. The apparatus generally includes an accelerator 1, an operating chamber 2, a first target plate 3, a second target plate 4, and a water-cooling mechanism 5. The accelerator 1 generates a proton beam. The first target plate 3 and the second target plate 4 are arranged side-by-side inside the operating chamber 2 so that they are irradiated by the proton beam in a linear manner to produce isotopes. The water-cooling mechanism 5 generally includes a water-cooling cavity 51, multiple heat sinks 52, and a water supply assembly 53. The water-cooling cavity 51 is formed inside the operating chamber 2 and located between the first target plate 3 and the second target plate 4. The water supply assembly 53 communicates with the water-cooling cavity 51 to continuously supply cold water to fill the cavity, forming a water wall. The multiple heat sinks 52 are equidistantly installed inside the water-cooling cavity 51 and are arranged perpendicular to the first target plate 3 and the second target plate 4 so that the proton beam passing through the heat sinks 52 does not need to pass through the water wall, thus avoiding energy loss.

[0042] The solid target apparatus for isotope production of this application has multiple heat sinks 52 arranged inside the water-cooled cavity 51 in a manner perpendicular to the first target plate 3 and the second target plate 4. The proton beam passing through the heat sink 52 does not need to pass through the water wall, thus avoiding the energy loss of the proton beam and improving the production capacity of isotopes Mo99 and Tc99m.

[0043] Specifically, the accelerator 1 is an existing accelerator, and the first target plate 3 and the second target plate 4 are both Mo100 target plates, which are arranged vertically inside the operating box 2 in the radial direction.

[0044] Furthermore, there are gaps between the multiple radiators 52 to allow for the flow of cold water.

[0045] In this embodiment, the specific number and size of the heat sinks 52 can be determined according to actual needs, and all heat sinks 52 are made of stainless steel.

[0046] See Figure 1 and Figure 2In a preferred embodiment of the above-mentioned isotope production solid target apparatus, the water-cooling cavity 51 generally includes a first metal plate 511, a second metal plate 512, a water-cooling cavity inlet 513, and a water-cooling cavity outlet 514. The first metal plate 511 is fixed to one side of the inside of the operating box 2 and arranged radially in the operating box 2. The second metal plate 512 is fixed to the other side of the inside of the operating box 2 and arranged radially in the operating box 2. The water-cooling cavity inlet 513 is located in the upper part of the operating box 2, between the first metal plate 511 and the second metal plate 512. The water-cooling cavity outlet 514 is located in the lower part of the operating box 2, between the first metal plate 511 and the second metal plate 512.

[0047] The middle part of the operating box 2 can be divided into a water-cooled cavity 51 by setting a first metal plate 511 and a second metal plate 512. A water-cooled cavity inlet 513 and a water-cooled cavity outlet 514 are also provided to allow cold water to flow in and out of the water-cooled cavity 51.

[0048] In this embodiment, both the first metal plate 511 and the second metal plate 512 are made of stainless steel and are rectangular in shape to match the cross-section of the operating box 2. The water-cooling cavity inlet 513 and the water-cooling cavity outlet 514 are preferably arranged coaxially.

[0049] Continue reading Figure 3 In a preferred embodiment of the aforementioned isotope production solid target apparatus, the heat sink 52 generally includes a cylindrical body 521 and multiple fins 522. The cylindrical body 521 is arranged axially with the operating box 2, with one end fixedly connected to a first metal plate 511 and the other end fixedly connected to a second metal plate 512. The multiple fins 522 are equidistantly arranged on the outside of the cylindrical body 521, allowing the proton beam passing through the interior of the cylindrical body 521 to bypass the water wall, thus avoiding energy loss. The cooling effect can be improved by using multiple fins 522.

[0050] Specifically, the interior of the cylinder 521 is a hollow structure for the passage of the proton beam. One end of the cylinder 521 is sealed and welded to the first metal plate 511, and the other end of the cylinder 521 is sealed and welded to the second metal plate 512, so that the interior of the cylinder 521 is sealed to prevent cold water from entering. Fins 522 are welded to the outer periphery of the cylinder 521 in a manner that surrounds the cylinder 521, thereby increasing the heat dissipation area.

[0051] Continue reading Figure 1 and Figure 2In a preferred embodiment of the above-described isotope production solid target apparatus, the water supply assembly 53 generally includes a first flow channel pipe 531, a second flow channel pipe 532, and a deionized water circulation cooling system 533. One end of the first flow channel pipe 531 is connected to the inlet 513 of the water-cooled chamber, and the other end is connected to the outlet of the deionized water circulation cooling system 533. One end of the second flow channel pipe 532 is connected to the outlet 514 of the water-cooled chamber, and the other end of the first flow channel pipe 531 is connected to the inlet of the deionized water circulation cooling system 533, facilitating cold water circulation. The first flow channel pipe 531, the second flow channel pipe 532, and the deionized water circulation cooling system 533 are used to supply cold water to the water-cooled chamber 51.

[0052] In this embodiment, one end of the first flow channel pipe 531 is sealed to the water-cooled cavity inlet 513 to prevent air from entering and cold water from leaking. The other end of the first flow channel pipe 531 is sealed to the outlet of the deionized water circulating cooling system 533 to prevent air from entering and cold water from leaking. The deionized water circulating cooling system 533 is an existing deionized water circulating cooling system.

[0053] Continue reading Figure 1 and Figure 2 In a preferred embodiment of the above-described isotope production solid target apparatus, the operating box 2 and the accelerator 1 are adjacent and coaxially arranged. The operating box 2 generally includes a first target cavity 21 and a second target cavity 22. The first target cavity 21 is located between the first metal plate 511 and one end of the operating box 2, and is used to place the first target piece 3, with the first target piece 3 and the first metal plate 511 in contact. The second target cavity 22 is located between the second metal plate 512 and the other end of the operating box 2, and is used to place the second target piece 4, with the second target piece 4 and the second metal plate 512 in contact. The arrangement of the first metal plate 511 and the second metal plate 512 to form a water-cooling cavity 51 allows for better fixation of the first target piece 3 and the second target piece 4 in their designated positions.

[0054] Specifically, the first metal plate 511 and the second metal plate 512 have the same shape and size, and the same cross-sectional shape as the operating box 2, and are sealed to the inner wall of the operating box 2. The proton beam generated by the accelerator 1 irradiates the first metal plate 511 and passes through the water-cooled cavity 51 to irradiate the second metal plate 512.

[0055] Continue reading Figure 1 and Figure 2In a preferred embodiment of the above-described isotope production solid target apparatus, the solid target apparatus further includes a target changing unit 6. This target changing unit 6 generally includes a first target plate entry / exit structure 61, a second target plate entry / exit structure 62, a first drive mechanism 63, a second drive mechanism 64, a first target plate supply unit 65, and a second target plate supply unit 66. The first target plate supply unit 65 is located on one side of the upper part of the operation box 2 and corresponds to the first target cavity 21. The first target plate supply unit 65 contains multiple spare first target plates 651 and is used to supply first target plates 3 to the first target cavity 21. The second target plate supply unit 66 is located on the other side of the upper part of the operation box 2 and corresponds to the second target cavity 22. The second target plate supply unit 66 contains multiple spare second target plates 661 and is used to supply second target plates 4 to the second target cavity 22. The first target plate entry / exit structure 61 and the second target plate entry / exit structure 62 are both located on the operation box 2. The first drive mechanism 63 is installed inside the first target cavity 21. The first drive mechanism 63 is used to move the spare first target piece 651 to a designated position and to drive the first target piece 3 out. The second drive mechanism 64 is installed inside the second target cavity 22. The second drive mechanism 64 is used to drive the spare second target piece 661 to a designated position and to drive the second target piece 4 out. By setting the target changing unit 6, the target pieces are changed using the gravity of the first target piece 3 and the second target piece 4.

[0056] Specifically, the first target plate entry / exit structure 61 controls the entry of the spare first target plate 651 into the first target cavity 21 and controls the exit of the first target plate 3 from the first target cavity 21. The second target plate entry / exit structure 62 controls the entry of the spare second target plate 661 into the second target cavity 22 and controls the exit of the second target plate 4 from the second target cavity 22. The first drive mechanism 63 can drive the spare first target plate 651 to move inside the first target cavity 21, so that the spare first target plate 651 and the first metal plate 511 are bonded together to form the first target plate 2. The second drive mechanism 64 can drive the spare second target plate 661 to move inside the second target cavity 22, so that the spare second target plate 661 and the second metal plate 512 are bonded together. The first target plate supply unit 65 is used to provide the spare first target plate 651, so that the spare first target plate 651 automatically enters the first target cavity 21. The second target plate supply unit 66 is used to provide the spare second target plate 661, so that the spare second second target plate 661 automatically enters the second target cavity 22.

[0057] In this embodiment, the first target plate entry / exit structure 61 and the second target plate entry / exit structure 62 are arranged symmetrically from left to right, the first drive mechanism 63 and the second drive mechanism 64 are arranged symmetrically from left to right, and the first target plate supply unit 65 and the second target plate supply unit 66 are also arranged symmetrically from left to right.

[0058] In the preferred embodiment of the above-described isotope production solid target apparatus, the first target supply unit 65 and the second target supply unit 66 have the same structure. The first target supply unit 65 generally includes a first target box 652 and a first driving device 653. The first target box 652 is located on the upper side of the housing 2 and corresponds to the first target cavity 21. The lower part of the first target box 652 has a first target box outlet 654. The first driving device 653 is installed inside the first target box 652 and away from the first target box outlet 654. Multiple spare first target pieces 651 are located in front of the first driving device 653 and close to the first target box outlet 654, so that the first driving device 653 pushes the multiple spare first target pieces 651 toward the first target box outlet 654, allowing one spare first target piece 651 from an adjacent first target box outlet 654 to enter the first target cavity 21 from the first target box outlet 654. Multiple spare first target pieces 651 are stored in the first target box 652, and the first driving device 653 can send the spare first target pieces 651 into the first target cavity 21 as needed.

[0059] Optionally, the first drive unit 653 is a piston, a cylinder, or an electric motor.

[0060] Optionally, the first target box 652 is rectangular in shape.

[0061] It should be noted that since the first target supply unit 65 and the second target supply unit 66 have the same structure, only the detailed structure of the first target supply unit 65 will be described.

[0062] Please refer to further reading Figure 1 and Figure 2 In the preferred embodiment of the above-described isotope production solid target apparatus, the first target plate inlet / outlet structure 61 and the second target plate inlet / outlet structure 62 have the same structure. The first target plate inlet / outlet structure 61 generally includes a first target plate inlet 611 and a first target plate outlet 612. The first target plate inlet 611 is located in the upper part of the operating box 2 and near the water-cooling cavity inlet 513, while the first target plate outlet 612 is located in the lower part of the operating box 2 and adjacent to the water-cooling cavity outlet 514. The first target plate inlet 611 and the first target box outlet 654 are coaxially arranged to allow a spare first target plate 651 to enter the first target cavity 21. The first target plate inlet 611 and the first target plate outlet 612 are provided to allow the spare first target plate 651 to enter the first target cavity 21.

[0063] Specifically, the first target inlet 611 and the first target outlet 612 have the same structural dimensions to facilitate the entry and exit of the first target 3 into the first target cavity 21. The width and length of the first target inlet 611 and the first target outlet 612 are slightly larger than the width and thickness of the first target 3 to facilitate the entry of the first target 3 into the first target cavity 21 without obstruction.

[0064] Furthermore, the first target plate inlet 611 and the water-cooling cavity inlet 513 are at a certain distance. When the first drive mechanism 63 delivers the first target plate 3 to the side of the first metal plate 511, the first drive mechanism 63 can block the first target plate inlet 611 to achieve a seal.

[0065] It should be noted that since the first target plate entry / exit structure 61 and the second target plate entry / exit structure 62 have the same structure, only the detailed structure of the first target plate entry / exit structure 61 will be described.

[0066] See Figure 2 and Figure 4 In the preferred embodiment of the above-described isotope production solid target apparatus, the first driving mechanism 63 and the second driving mechanism 64 have the same structure. The first driving mechanism 63 generally includes a first power unit 631, a second power unit 632, a first plate 633, and a second plate 634. The first power unit 631 is disposed in the upper part of the first target cavity 21 and fixedly connected to the operation box 2. The second power unit 632 is disposed in the lower part of the second target cavity 22 and fixedly connected to the operation box 2. The first plate 633 is horizontally disposed in the upper part of the first target cavity 21. The top of the first plate 633 is slidably connected to the inner wall of the operation box 2. One end of the first plate 633 is connected to the first power unit 631, and the other end of the first plate 633 has a first plate flange 635. The second plate 634 is horizontally disposed in the lower part of the first target cavity 21. The lower part of the second plate 634 is slidably connected to the inner wall of the operation box 2. One end of the second plate 634 is connected to the second power unit 632, and the other end of the second plate 634 is provided with a second plate protrusion 636. The front end 637 of the second plate protrusion 636 and the first plate protrusion 635 are coaxially arranged, and the rear end 638 of the second plate protrusion 636 and the first plate protrusion 635 are coaxially arranged.

[0067] When the spare first target piece 651 enters the first target cavity 21: the lower end of the spare first target piece 651 rests on the second plate body protrusion 636, and the upper end of the spare first target piece 651 rests on the front end 637 of the first plate body protrusion 635, so that the first power unit 631 and the second power unit 632 synchronously drive the first plate body 633 and the second plate body 634 to move towards the first metal plate 511, so as to attach the spare first target piece 651 and the first metal plate 511, so that the spare first target piece 651 forms a first target piece 3 that can be irradiated by the proton beam.

[0068] When the first target piece 3 is discharged from the first target cavity 21, the second power unit 632 drives the second plate 634 away from the first metal plate 511 so that the lower end of the first target piece 3 enters the first target piece outlet 612 for discharge.

[0069] By setting up a first power unit 631, a second power unit 632, a first plate 633, a second plate 634, a first plate protrusion 635, and a second plate protrusion 636, the first target plate 3 can be driven to a designated position, and after irradiation is completed, the first target plate 3 can be pushed out of the first target cavity 21.

[0070] It should be noted that since the first drive mechanism 63 and the second drive mechanism 64 have the same structure, only the detailed structure of the first drive mechanism 63 will be described. The replacement of the first target piece 3 and the second target piece 4 are carried out according to the set time. Whether to replace the first target piece 3 or the second target piece 4 first can be selected according to actual needs.

[0071] In this embodiment, the first plate 633 has a first sliding groove extending along its length on its upper surface, and the upper inner wall of the operation box 2 has a first slide rail corresponding to and adapted to the first sliding groove. The first sliding groove and the first slide rail are engaged to allow the first plate 633 to move forward and backward. The second plate 634 has a second sliding groove extending along its length on its upper surface, and the lower inner wall of the operation box 2 has a second slide rail corresponding to and adapted to the second sliding groove. The second sliding groove and the second slide rail are engaged to allow the second plate 634 to move forward and backward. Both the first power unit 631 and the second power unit 632 are pistons, cylinders, or motors.

[0072] In this embodiment, the size of the first plate flange 635 is adapted to the upper end size of the spare first target piece 651, and the size of the second plate flange 636 is adapted to the lower end size of the spare first target piece 651. The length of the first plate 633 is slightly less than the length of the second plate 634, thus the first plate flange 635 and the second plate flange 636 form different axial shapes. The first plate flange 635 does not obstruct the first target piece inlet 611, facilitating the entry of the spare first target piece 651 into the first target cavity 21, and can directly rest on the second plate flange 636, facilitating the movement of the spare first target piece 651.

[0073] Please refer to further reading Figure 1 and Figure 2 In a preferred embodiment of the above-mentioned solid target apparatus for isotope production, the solid target apparatus generally further includes a first target dissolution system 7 and a second target dissolution system 8 with identical structures. The first target dissolution system 7 is connected to the first target cavity 21, and the second target dissolution system 8 is connected to the second target cavity 22.

[0074] Specifically, the first target dissolution system 7 generally includes a first target outlet pipe 71 and a first target dissolution tank 72. One end of the first target outlet pipe 71 is sealed to the first target outlet 612, and the other end of the first target outlet pipe 71 is sealed to the inlet of the first target dissolution tank 72, so that the first target 3 can enter the first target dissolution tank 72.

[0075] In this embodiment, the first target sheet outflow pipe 71 is arranged in a form that is perpendicular to the first target sheet outlet 612 and the first target sheet dissolution tank 72, so that the first target sheet 3 falls directly into the first target sheet dissolution tank 72 by its own weight.

[0076] It should be noted that since the first target dissolution system 7 and the second target dissolution system 8 have the same structure, only the detailed structure of the first target dissolution system 7 will be described.

[0077] In this embodiment, the solid target device further includes a vacuum system 9, which is connected to both the first target cavity 21 and the second target cavity 22. The vacuum system 9 is a conventional vacuum system. One pipe of the vacuum system 9 is inserted into and sealed at the first through-hole of the operation box 2. This first through-hole is connected to the first target cavity 21 and is used to expel gas from the first target cavity 21. The other pipe of the vacuum system 9 is inserted into and sealed at the second through-hole of the operation box 2. This second through-hole is connected to the second target cavity 22 and is used to expel air from the second target cavity 22.

[0078] The solid target device also includes a control device (not shown in the figure), which is connected to the deionized water circulation cooling system 533, the first drive mechanism 63, the second drive mechanism 64, the first power unit 631, the second power unit 632, and the vacuum system 9 via signal communication.

[0079] The isotope production solid target apparatus of this application allows the proton beam to pass through the interior of the heat sink 52 and directly irradiate the second target plate 4, without being limited by the thickness of the water wall. This avoids energy loss of the proton beam and increases the production capacity of the isotopes Mo99 and Tc99m. Furthermore, by setting up a target replacement unit 6, the target plates 3 and 4 are replaced using their own gravity, enabling the simultaneous production of both molybdenum (Mo99) ​​and technetium (Tc99m) isotopes. The first target cavity 21 and the second target cavity 22 are a connected unit made of reinforced concrete, effectively preventing airflow. After irradiation by the accelerator 1, the first drive mechanism 63 pushes the first target plate 3 from the first target plate entry / exit structure 61 into the first target plate dissolution system 7, and the second drive mechanism 64 pushes the second target plate 4 into the second target plate dissolution system 8. The process of dissolving the target liquid locally and facilitating long-distance transport of the target liquid simplifies the production process. The irradiation conditions for producing molybdenum-technetium isotopes in Accelerator 1 have been optimized, narrowing the range of energy and beam intensity.

[0080] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. An isotope production solid target apparatus, characterized in that, The solid target device includes an accelerator, an operating box, a first target plate, a second target plate, and a water cooling mechanism; The accelerator is used to generate a proton beam; The first target and the second target are arranged side by side inside the operating box so that they can be irradiated in a straight line by the proton beam to produce isotopes; The water-cooling mechanism includes a water-cooling cavity, multiple radiators, and a water supply assembly; The water-cooled cavity is formed inside the operating box and is located between the first target plate and the second target plate; The water supply component is connected to the water-cooling cavity so as to continuously supply cold water to the water-cooling cavity, so that the interior of the water-cooling cavity is filled with cold water to form a water wall; Multiple heat sinks are installed inside the water-cooling cavity and are arranged perpendicular to the first target plate and the second target plate so that the proton beam passing through the inside of the heat sink does not need to pass through the water wall, thereby avoiding energy loss of the proton beam.

2. The isotope production solid target apparatus according to claim 1, characterized in that, The water-cooled cavity includes a first metal plate, a second metal plate, a water-cooled cavity inlet, and a water-cooled cavity outlet; The first metal plate is fixed to one side of the inside of the operating box and is arranged in the radial direction of the operating box; The second metal plate is fixed to the other side of the inside of the operating box and is arranged in the radial direction of the operating box; The water-cooled cavity inlet is located at the top of the control box and between the first metal plate and the second metal plate; The water-cooled cavity outlet is located at the bottom of the operating box, between the first metal plate and the second metal plate.

3. The isotope production solid target apparatus according to claim 2, characterized in that, The radiator includes a cylindrical body and multiple fins; The cylinder is arranged along the axial direction of the operating box, and one end of the cylinder is fixedly connected to the first metal plate, and the other end of the cylinder is fixedly connected to the second metal plate. Multiple fins are equidistantly arranged on the outside of the cylinder to increase cooling efficiency; The proton beam passing through the inside of the cylinder does not need to pass through the water wall to avoid energy loss of the proton beam.

4. The isotope production solid target apparatus according to claim 2, characterized in that, The water supply assembly includes a first flow channel pipe, a second flow channel pipe, and a deionized water circulation cooling system; One end of the first flow channel tube is connected to the inlet of the water-cooled cavity, and the other end of the first flow channel tube is connected to the outlet of the deionized water circulating cooling system. One end of the second flow channel is connected to the outlet of the water-cooled cavity, and the other end of the first flow channel is connected to the inlet of the deionized water circulation cooling system to facilitate the circulation of cold water.

5. The isotope production solid target apparatus according to claim 2, characterized in that, The operating box and the accelerator are adjacent to each other and coaxially arranged. The operating box includes a first target cavity and a second target cavity. The first target cavity is located between the first metal plate and one end of the operation box. The first target cavity is used to place the first target piece, and the first target piece and the first metal plate are attached together. The second target cavity is located between the second metal plate and the other end of the operating box. The second target cavity is used to place the second target piece, and the second target piece and the second metal plate are attached together.

6. The isotope production solid target apparatus according to claim 5, characterized in that, The solid target device further includes a target changing unit, which includes a first target plate entry / exit structure, a second target plate entry / exit structure, a first driving mechanism, a second driving mechanism, a first target plate supply unit, and a second target plate supply unit. The first target supply unit is located on the upper side of the operation box and corresponds to and communicates with the first target cavity. The first target supply unit is provided with a plurality of spare first target pieces inside. The first target supply unit is used to supply the first target piece to the first target cavity. The second target supply unit is located on the other side of the upper part of the operation box and corresponds to and communicates with the second target cavity. The second target supply unit is provided with a plurality of spare second target pieces inside. The second target supply unit is used to supply the second target pieces to the second target cavity. The first target plate entry / exit structure is located on the operation box; The second target plate entry / exit structure is located on the operation box; The first drive mechanism is installed inside the first target cavity. The first drive mechanism is used to drive the spare first target piece to a designated position and to drive the first target piece out. The second drive mechanism is installed inside the second target cavity. The second drive mechanism is used to drive the spare second target piece to a designated position and to drive the second target piece out.

7. The isotope production solid target apparatus according to claim 6, characterized in that, The first target supply unit and the second target supply unit have the same structure. The first target supply unit includes a first target box and a first driving device. The first target box is disposed on the upper side of the box body and corresponds to the first target cavity, and the lower part of the first target box is provided with a first target box outlet; The first drive device is installed inside the first target box and away from the outlet of the first target box; In this configuration, multiple spare first target pieces are located in front of the first driving device and close to the first target box outlet, so that the first driving device pushes the multiple spare first target pieces toward the first target box outlet, so that a spare first target piece adjacent to the first target box outlet enters the first target cavity from the first target box outlet.

8. The isotope production solid target apparatus according to claim 7, characterized in that, The first target plate entry / exit structure and the second target plate entry / exit structure have the same structure; The first target plate entry / exit structure includes a first target plate inlet and a first target plate outlet; The first target inlet is located at the top of the control box and on the side near the inlet of the water-cooling cavity; The first target plate outlet is located at the bottom of the operation box and is adjacent to one side of the water-cooling cavity outlet; The first target inlet and the first target box outlet are coaxially arranged so that the spare first target can enter the first target cavity.

9. The isotope production solid target apparatus according to claim 8, characterized in that, The first drive mechanism and the second drive mechanism have the same structure; The first driving mechanism includes a first power unit, a second power unit, a first plate, and a second plate; The first power unit is disposed in the upper part of the first target cavity and is fixedly connected to the operation box; The second power unit is located in the lower part of the second target cavity and is fixedly connected to the operation box; The first plate is horizontally disposed in the upper part of the first target cavity. The upper surface of the first plate is slidably connected to the inner wall of the operation box. One end of the first plate is connected to the first power unit, and the other end of the first plate is provided with a first plate protrusion. The second plate is horizontally disposed in the lower part of the first target cavity. The lower part of the second plate is slidably connected to the inner wall of the operation box. One end of the second plate is connected to the second power unit, and the other end of the second plate is provided with a second plate protrusion. Wherein, the front ends of the second plate body protrusion and the first plate body protrusion are coaxially arranged, and the rear ends of the second plate body protrusion and the first plate body protrusion are coaxially arranged. When the spare first target plate enters the first target cavity: the lower end of the spare first target plate rests on the protruding edge of the second plate, and the upper end of the spare first target plate rests on the front end of the protruding edge of the first plate, so that the first power unit and the second power unit synchronously drive the first plate and the second plate to move toward the first metal plate, so as to attach the spare first target plate and the first metal plate together, so that the spare first target plate forms the first target plate that can be irradiated by the proton beam. When the first target piece is discharged from the first target cavity: the second power unit drives the second plate away from the first metal plate, so that the lower end of the first target piece enters the first target piece outlet and is discharged.

10. The isotope production solid target apparatus according to claim 8, characterized in that, The solid target device also includes a first target sheet dissolution system and a second target sheet dissolution system with the same structure. The first target sheet dissolution system is connected to the first target cavity, and the second target sheet dissolution system is connected to the second target cavity. The first target dissolution system includes a first target outlet pipe and a first target dissolution tank; One end of the first target sheet outflow pipe is connected to the first target sheet outlet, and the other end of the first target sheet outflow pipe is connected to the inlet of the first target sheet dissolution tank, so that the first target sheet enters the first target sheet dissolution tank. The solid target device also includes a vacuum system, which is connected to the first target cavity and the second target cavity respectively.

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