Solid target device for accelerator isotope production and operation method

Abstract

The invention discloses a solid target device for accelerator isotope production and an operation method. The solid target device at least comprises a target body positioning mechanism, a target body mechanism, a target body sliding-out mechanism, a target body propelling mechanism, a target body clamping mechanism and a shielding tank mechanism. The target body positioning mechanism is fixedly connected with the shielding tank mechanism through the target body sliding-out mechanism; the target body positioning mechanism comprises a vacuum isolating membrane fixing device, a target body fixing device and a helium flow distributor; the target body mechanism comprises at least one target body and a target body dovetail slide way for fixing the target body, one side of the target body fixing device is fixedly connected with the target body dovetail slide way, and the other opposite side of the target body fixing device is fixedly connected with the target body sliding-out mechanism; the target body pushing mechanism comprises a target body pushing base, a movable sliding block and a target pushing plate, and the target body clamping mechanism comprises a target body pushing seat, a target body pushing plate fixed to the outer side of the target body pushing seat, a pushing air cylinder and a sliding block. The isotope production yield can be effectively improved, whole-process automatic control is achieved, operation is easy and convenient, and maintenance is convenient.

Description

Technical Field

[0001] The present application relates to the technical field of solid target devices, and in particular to a solid target device for accelerator isotope production and an operating method thereof. Background Art

[0002] The production of radioactive isotopes mainly relies on accelerators and target devices that produce high-speed particles. The target devices are loaded with target materials and are mainly used to receive the particle beams produced by the accelerators and then undergo nuclear reactions to produce the required radioactive isotopes.

[0003] Currently, the most commonly used diagnostic radioisotopes are 18 Some short half-life radionuclides, such as F, have great limitations in labeling precursors with long biological half-lives. Therefore, the current short half-life radionuclides can no longer meet the goal of integrated diagnosis and treatment, and longer half-life radioisotopes need to be produced to match them. In addition, the demand for the production of therapeutic radionuclides is also imminent.

[0004] Currently available solid target devices generally have the disadvantages of complex structure, inconvenient assembly and disassembly, and inability to be produced continuously and on a large scale. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a solid target device for accelerator isotope production and an operating method, which solves the problems of the existing solid target device having a complex structure, being inconvenient to disassemble and assemble, and being unable to be produced continuously and on a large scale.

[0006] In order to achieve the above object, the present invention proposes the following technical solutions:

[0007] A solid target device for accelerator isotope production, the solid target device at least comprises a target positioning mechanism, a target mechanism, a target sliding mechanism, a target propulsion mechanism, a target clamping mechanism and a shielding tank mechanism; the target positioning mechanism is fixedly connected to the shielding tank mechanism through the target sliding mechanism; wherein,

[0008] The target positioning mechanism comprises a vacuum isolation membrane fixing device, a target fixing device, and a helium flow distributor sandwiched and fixed between the vacuum isolation membrane fixing device and the target fixing device.

[0009] The target body mechanism comprises at least one target body and a target body dovetail slideway for fixing the at least one target body, one side of the target body fixing device is fixedly connected to the target body dovetail slideway, and the other side of the target body fixing device is fixedly connected to the target body slideway;

[0010] The target body propulsion mechanism comprises a target body propulsion base, a movable slide block arranged on the target body propulsion base, and a target pushing plate fixed on the movable slide block, wherein the target pushing plate is used to push the at least one target body to move toward the target body fixing device;

[0011] The target body clamping mechanism comprises a target body pushing seat, a target body pushing plate fixed on the outside of the target body pushing seat, and a pushing cylinder and a sliding block for fixing the target body pushing plate.

[0012] In one embodiment of the present invention, vacuum isolation membranes are respectively arranged on both sides of the helium flow distributor, and the target fixing device, the helium flow distributor, the vacuum isolation membrane fixture and the two vacuum isolation membranes are fixed as a whole by a plurality of fixing bolts; the vacuum isolation membrane fixing device is provided with a helium inlet, a helium outlet, a first channel and a second channel, the first channel is respectively connected to the helium inlet and the helium flow distributor, and the second channel is connected to the helium outlet.

[0013] In one embodiment of the present invention, the vacuum isolation membrane fixing device is extended with a collimating channel, and one end of the collimating channel is further extended with a connecting flange, and the connecting flange is fixedly connected to the beam port.

[0014] In one embodiment of the present invention, the target fixing device is provided with a target accommodating cavity, the target sliding mechanism includes a target slide, the target accommodating cavity is connected to the target slide, the target slide is inclined, and the end position of the target sliding mechanism connected to the target positioning mechanism is higher than the end position of the target sliding mechanism connected to the shielding tank mechanism.

[0015] In one embodiment of the present invention, the target body includes a microchannel cooling base, a target material, a sealing film and a wire ring in sequence. A dovetail groove is provided at the bottom of the microchannel cooling base. All the target materials are installed through the dovetail groove and move on the dovetail slide of the target body. A water-sealed cover plate is also fixed to one side of the microchannel cooling base, and a cooling water inlet jack and a cooling water outlet jack are provided on the cover plate surface.

[0016] In one embodiment of the present invention, two water channel plugs are provided on the front surface of the target push seat, and the two water channel plugs are arranged up and down, and their positions correspond to the cooling water inlet jack and the cooling water outlet jack on the cover plate surface respectively.

[0017] In one embodiment of the present invention, a compressed gas inlet and a compressed gas outlet are also provided on the side of the target push seat, a cooling water inlet and a cooling water outlet are also provided on the side of the pushing cylinder and the slider, and the target positioning mechanism is installed and fixed on the pushing cylinder and the slider.

[0018] In one embodiment of the present invention, the target propulsion mechanism also includes a stepper motor fixed on a target propulsion base, a screw connected to the stepper motor, and a slide rod arranged on both sides of the screw rod, wherein the screw rod drives the movable slide bar to move forward and backward along the direction of the slide rod, and the stepper motor controls the movable slide bar to move a distance each time that is the same as the width of a target.

[0019] In one embodiment of the present invention, a first limit switch and a second limit switch are further provided on the target body propulsion base, and the first limit switch and the second limit switch limit the moving position of the movable slider on the slide rod.

[0020] In one embodiment of the present invention, the target pushing plate includes a fixing portion and a propulsion portion, the fixing portion is fixed on the upper surface of the movable slider, the propulsion portion is arranged perpendicular to the fixing portion, and one end of the propulsion portion extends out of the edge of the fixing portion to form a recessed portion in contact with the target body, the target pushing plate is fitted with the outermost target bodies arranged in sequence, and the side surface of the target body is accommodated in the above-mentioned recessed portion.

[0021] In one embodiment of the present invention, the shielding tank mechanism includes a shielding cylinder, a shielding cover installed on the shielding cylinder, an opening mechanism, and a dragging mechanism and a lifting mechanism for controlling the movement of the opening mechanism; an insertion port is provided on the shielding cover, and the front fork of the opening mechanism is inserted into the above-mentioned insertion port, the dragging mechanism controls the horizontal movement of the opening mechanism, and the lifting mechanism controls the vertical movement of the opening mechanism.

[0022] In one embodiment of the present invention, the shielding tank mechanism further comprises a shielding cylinder positioning plate and a supporting structure, the shielding cylinder body is arranged on the shielding cylinder positioning plate, and the shielding cylinder positioning plate is fixed on the supporting structure.

[0023] The present invention also proposes an operation method of the solid target device for accelerator isotope production using the above-mentioned method, comprising the following steps:

[0024] The moving slide block is controlled by a stepper motor to move forward, and the target push plate pushes the target located at the front of the target dovetail slide into the target fixing device, pushing the cylinder and the slide block to work, and the target push plate pushes the target push seat forward, and the water channel plug on the target push seat is respectively inserted into and fixed to the cooling water inlet jack and the cooling water outlet jack on the target;

[0025] After the target shooting is completed, the cylinder and the slider are pushed to start again, the target push plate drags the target push seat to move backward, the water plug is disconnected from the cooling water inlet jack and the cooling water outlet jack, and the stepper motor continues to control the moving slider to move forward, pushing the next target into the target fixing device in turn, and the irradiated target in the target fixing device slides into the shielding cylinder of the shielding tank mechanism through the target slide.

[0026] In one embodiment of the present invention, before the beam irradiates the target body, the shielding tank mechanism is started, the dragging mechanism moves forward, driving the cover opening mechanism to insert into the insertion port of the shielding cover, the lifting mechanism rises and drives the cover opening mechanism to open the shielding cover, the dragging mechanism moves backward, driving the cover opening mechanism to move the shielding cover backward, and completing the opening of the shielding cylinder;

[0027] After the irradiated target body slides into the shielding cylinder, the shielding tank mechanism is started again, the dragging mechanism moves forward, the shielding cover is located above the shielding cylinder, the lifting mechanism descends, the opening mechanism drives the shielding cover to be stuck on the shielding cylinder, the dragging mechanism moves backward, the opening mechanism disengages from the insertion port of the shielding cover, and the closing of the shielding cylinder is completed.

[0028] Beneficial effects of the present invention:

[0029] The improved solid target device for accelerator isotope production of the present invention solves the problems of the existing solid target device with complex structure, inconvenient assembly and disassembly, and inability to produce continuously and on a large scale. The solid target device and operation method for isotope production realize the compactness and beauty of the equipment, stable structure and operation, and can effectively improve the isotope production output. The whole process is automatically controlled, easy to operate, and convenient to maintain. The opening and closing of the shielding tube can be remotely controlled, which is easy to operate, simple in structure, and avoids radiation damage to operators. Continuous irradiation of multiple targets can produce different radioactive nuclides in a group of experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the solid target device of the present invention;

[0031] Figure 2 It is a schematic structural diagram of the target device of the present invention;

[0032] Figure 3 It is a schematic diagram of the structure of the target body of the present invention;

[0033] Figure 4 It is a structural schematic diagram of the shielding tank mechanism of the present invention.

[0034] Reference numerals: 100 - target positioning mechanism; 200 - target mechanism; 300 - target sliding mechanism; 400 - target pushing mechanism; 500 - target clamping mechanism; 600 - shielding tank mechanism;

[0035] 1-connecting flange; 2-collimation channel; 3-helium outlet; 4-helium inlet; 5-vacuum isolation membrane fixing device; 6, 61-vacuum isolation membrane; 7-helium flow distributor; 8-target dovetail slide; 9-target fixing device; 10-target slide; 11, 32, 33, 37, 38, 39-target; 12-target push seat; 13-target push plate; 14-slider; 15-compressed gas inlet; 16 compressed gas outlet; 17-cooling water inlet; 18-cooling water outlet; 19, 20, 21, 22-fixing bolts; 23-target push Base; 24-stepping motor; 25-target push plate; 26-coupling; 27-slide rod; 28-screw rod; 29-moving slider; 30-first limit switch; 31-second limit switch; 331-microchannel cooling base; 34-target material; 35-sealing film; 36-wire ring; 40-water sealing cover plate; 41-cooling water inlet jack; 42-cooling water outlet jack; 43-support structure; 44-shielding cylinder positioning plate; 45-shielding cylinder; 46-shielding cover; 47-cover opening mechanism; 48-dragging mechanism; 49-lifting mechanism; 50-translational cylinder. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of this application clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The terms "first", "second", "third", etc. (if any) in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the objects described in this way can be interchanged where appropriate. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. The directional terms mentioned in the present invention, such as: up, down, left, right, front, back, inside, outside, side, etc., are only reference directions of the accompanying drawings. The embodiments described below by reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. In addition, the present invention repeats reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art can recognize the application of other processes and / or the use of other materials.

[0038] like Figures 1 to 4 As shown, the present invention provides a solid target device for accelerator isotope production, which at least includes a target positioning mechanism 100, a target mechanism 200, a target sliding mechanism 300, a target propulsion mechanism 400, a target clamping mechanism 500 and a shielding tank mechanism 600. The target positioning mechanism 100 is fixedly connected to the shielding tank mechanism 600 via the target sliding mechanism 300.

[0039] Specifically, the target positioning mechanism 100 includes a vacuum isolation film fixing device 5, a target fixing device 9, and a helium flow distributor 7 sandwiched and fixed between the vacuum isolation film fixing device 5 and the target fixing device 9. The target positioning mechanism 100 is used to position the target to align the beam.

[0040] The target body slides out of the mechanism 300, after the target body irradiation is completed, the target body slides from the target position into the shielding tank mechanism through the slide out mechanism.

[0041] The target propulsion mechanism 400 can load multiple solid targets at one time to continuously irradiate to meet the needs of isotope production.

[0042] The target clamping mechanism 500 is used to tightly connect the target with the beam port. The mechanism clamps the target together with the cooling water inlet and outlet plugs while inserting the water cooling plug into the heat exchanger at the back of the target.

[0043] The shielding tank mechanism 600 can automatically open or close the cover. The sealing cover of the shielding tank mechanism is automatically opened remotely before the target is irradiated, and the cover is automatically closed remotely after the target slides into the shielding tank mechanism after irradiation.

[0044] Furthermore, vacuum isolation membranes 6, 61 are respectively provided on both sides of the helium flow distributor 7. The double-layer vacuum isolation membranes 6, 61 are used to seal the accelerator vacuum chamber. The double-layer design enhances the heat dissipation of the membrane, which is beneficial to withstand a greater beam current intensity.

[0045] The target fixing device 9, the helium flow distributor 7, the vacuum isolation membrane fixture 5 and the two vacuum isolation membranes 6, 61 are fixed together by a plurality of fixing bolts 19, 20, 21, 22. Preferably, they are fixed by four fixing bolts, which are respectively located at four corners.

[0046] The vacuum isolation membrane fixing device 5 is provided with a helium inlet 4 , a helium outlet 3 , a first channel and a second channel (not shown). The first channel is connected to the helium inlet 4 and the helium flow distributor 7 respectively, and the second channel is connected to the helium outlet 3 .

[0047] In addition, the vacuum isolation membrane fixing device 5 is extended with a collimating channel 2, and one end of the collimating channel 2 is further extended with a connecting flange 1, and the connecting flange 1 is fixedly connected to the beam port.

[0048] Specifically, the connecting flange 1 is tightly connected to the beam port, the collimating channel 2 connects the connecting flange 1 to the vacuum isolation membrane fixing device 5, and a helium flow distributor 7 is arranged between the two vacuum isolation membranes 6 and 61. Helium enters from the helium inlet 4 and enters the helium flow distributor 7 through the vacuum isolation membrane fixing device 5. The helium is blown toward the two vacuum isolation membranes 6 and 61 respectively, so as to cool the vacuum isolation membranes 6 and 61. Finally, the helium flows toward the vacuum isolation membrane fixing device 5 through the helium flow distributor 7 and is finally discharged from the helium outlet 3.

[0049] Furthermore, the target fixing device 9 is provided with a target accommodating cavity, the target sliding mechanism 300 includes a target slide 10, the target accommodating cavity is connected to the target slide 10, the target slide 10 is inclined, and the end position of the target sliding mechanism 300 connected to the target positioning mechanism 100 is higher than the end position connected to the shielding tank mechanism 600.

[0050] The target mechanism 200 includes at least one target 11 and a target dovetail slide 8 for fixing at least one target 11 . One side of a target fixing device 9 is fixedly connected to the target dovetail slide 8 , and the other side of the target fixing device 9 is fixedly connected to a target slide-out mechanism 300 .

[0051] Preferably, the target structure includes six targets 11 , 32 , 33 , 37 , 38 , 39 , and the six targets 11 , 32 , 33 , 37 , 38 , 39 are sequentially arranged on the target dovetail slide 8 .

[0052] Specifically, each target body 11, 32, 33, 37, 38, 39 includes a microchannel cooling base 331, a target material 34, a sealing film 35 and a wire ring 36 which are combined in sequence. A dovetail groove is provided at the bottom of the microchannel cooling base 331. All target bodies are installed through the dovetail groove and move on the target dovetail slide 8. A water sealing cover plate 40 is also fixed to one side of the microchannel cooling base 331. A cooling water inlet jack 41 and a cooling water outlet jack 42 are also provided on the water sealing cover plate 40.

[0053] Furthermore, a target groove (not shown) is provided on the front of the microchannel cooling base 331, and the back is fixedly connected to the water-sealed cover plate 40. The assembly method of each target body 11, 32, 33, 37, 38, 39 is as follows: the target material 34 is placed in the target groove of the microchannel cooling base 331, a sealing film 35 is placed on the target material 34, and the wire ring 36 is used to connect and fix the microchannel cooling base 331, so as to fix the sealing film 35 and the target material 34, and the water-sealed cover plate 40 is also fixedly installed on the back of the microchannel cooling base 331. After the assembly of a single target body is completed, since there is a dovetail groove at the bottom of the microchannel cooling base 331, the assembled targets are pushed into the target dovetail slide 8 one by one in series to complete the installation of the target body mechanism 200.

[0054] The main feature of the target body 11, 32, 33, 37, 38, 39 of the present invention is that the base and the microchannel heat exchanger are combined as an integrated structure to form a microchannel cooling base 331. The powerful heat dissipation capacity of the microchannel can make the target material carry a larger beam current, thereby increasing the yield of the target radioactive nuclide. At the same time, the sealing film 35 can be used as a film to seal the nuclide, and its thickness can be adjusted to be used as an energy degrader, so that the solid target can produce the target radioactive nuclide under a more suitable beam energy.

[0055] Preferably, the entire microchannel cooling base 331 can be made of graphite-based or ceramic-based materials, so that the base can be reused after being placed for a period of time after the target shooting is completed, which can effectively reduce the amount of radioactive solid waste.

[0056] The target propulsion mechanism 400 includes a target propulsion base 23 , a movable slider 29 disposed on the target propulsion base 23 , and a target pushing plate 25 fixed on the movable slider 29 . The target pushing plate 25 is used to push the target mechanism to move toward the target fixing device 9 .

[0057] Among them, the target pushing plate 25 includes a fixing part and a propulsion part. The fixing part is fixed on the upper surface of the movable slider 29. The propulsion part is arranged vertically to the fixing part, and one end of the propulsion part extends out of the edge of the fixing part to form a recessed part in contact with the target bodies 11, 32, 33, 37, 38, and 39. The target pushing plate 25 fits with the outermost target bodies arranged in sequence, and the side surfaces of the target bodies are accommodated in the above-mentioned recessed parts.

[0058] Furthermore, the target propulsion mechanism 400 also includes a stepper motor 24 fixed on the target propulsion base 23, a screw rod 28 connected to the stepper motor 24, and slide rods 27 arranged on both sides of the screw rod 28. The screw rod 28 drives the movable slide bar 29 to move forward and backward along the direction of the slide rod 27. The stepper motor 24 controls the movable slide bar 29 to move a distance each time that is the same as the width of a target 11, 32, 33, 37, 38, 39.

[0059] Furthermore, the target body propulsion mechanism 400 further includes a coupling 26 , which connects the lead screw 28 and the stepper motor 24 , and when the stepper motor 24 rotates, the lead screw 28 is driven to rotate.

[0060] In addition, in order to prevent the target propulsion mechanism 400 from being overloaded, a first limit switch 30 and a second limit switch 31 are provided on the target propulsion base 23 , and the first limit switch 30 and the second limit switch 31 limit the moving position of the movable slider 29 on the slide bar 27 .

[0061] The target clamping mechanism 500 includes a target pushing seat 12 , a target pushing plate 13 fixed to the outside of the target pushing seat 12 , and a pushing cylinder and a sliding block 14 for fixing the target pushing plate 13 .

[0062] Furthermore, two water channel plugs are arranged on the front surface of the target body push seat 12, and the two water channel plugs are arranged up and down, and the positions correspond to the cooling water inlet plug hole 41 and the cooling water outlet plug hole 42 on the surface of the water sealing cover plate 40. When working, the water channel plug of the target body push seat 12 is inserted into the cooling water inlet plug hole 41 and the cooling water outlet plug hole 42 of the water sealing cover plate 40 on the back of the target body, and can also play a fixing role.

[0063] Preferably, the side of the target push seat 12 is also provided with a compressed gas inlet 15 and a compressed gas outlet 16, the side of the pushing cylinder and the slider 14 is also provided with a cooling water inlet 17 and a cooling water outlet 18, and the target positioning mechanism is installed and fixed on the pushing cylinder and the slider 14.

[0064] The shielding tank mechanism 600 includes a shielding cylinder 45, a shielding cover 46 mounted on the shielding cylinder 45, a cover opening mechanism 47, and a dragging mechanism 48 and a lifting mechanism 49 for controlling the movement of the cover opening mechanism 47. The shielding cover 46 is provided with an insertion port, and the front fork of the cover opening mechanism 47 is inserted into the insertion port. The dragging mechanism 48 controls the horizontal movement of the cover opening mechanism 47, and the lifting mechanism 49 controls the vertical movement of the cover opening mechanism 47.

[0065] Preferably, the cover opening mechanism 47 is fixed on the dragging mechanism 48 .

[0066] Specifically, the shielding tank mechanism 600 further includes a shielding cylinder positioning plate 44 and a support structure 43 . The shielding cylinder body 45 is disposed on the shielding cylinder positioning plate 44 , and the shielding cylinder positioning plate 44 is fixed on the support structure.

[0067] Preferably, the shielding cylinder positioning plate 44 has an extended plane, and the dragging mechanism 48 and the lifting mechanism 49 are both arranged on the extended plane.

[0068] Furthermore, the dragging mechanism 48 also includes a translation cylinder 50, and the pushing or retracting of the translation cylinder 50 drives the horizontal movement of the cover opening mechanism 47. The lifting mechanism 49 also includes a cylinder (not shown), and the cylinder pushes the cover mechanism 47 up or down. Then, the opening and closing relationship between the shielding cover 46 and the shielding cylinder 45 is controlled in both horizontal and vertical directions, so as to achieve the purpose of remotely controlling the opening and closing of the shielding cylinder.

[0069] The solid target device of the present invention has a stable structure and operation, can effectively improve the isotope production output, has full-process automatic control, is easy to operate, and is convenient to maintain.

[0070] The present invention also proposes an operation method of the solid target device for accelerator isotope production using the above-mentioned method, comprising the following steps:

[0071] Assemble the microchannel cooling base 33, the target material 34, the sealing film 35, the wire ring 36 and the water sealing cover plate 40 to form the target bodies 11, 32, 33, 37, 38, 39;

[0072] After the target bodies 11, 32, 33, 37, 38, 39 are assembled, the dovetail grooves of the target bodies 11, 32, 33, 37, 38, 3 are aligned with the target dovetail slide bar 8, and all the assembled target bodies are installed on the target dovetail slide bar 8, among which the last target body 32 is attached to the target push plate 25 fixed on the moving slider 29.

[0073] The stepper motor 24 is controlled to work, and the stepper motor 24 controls the moving slider 29 to move forward, and the moving slider 29 moves forward by a distance of the target width, so that the target pushing plate 25 pushes the target 11 located at the front of the target dovetail slide 8 into the target accommodating cavity of the target fixing device 9. At this time, the target 11 faces the center of the beam surface and is aligned with the center of the collimator.

[0074] The push cylinder and the slider 14 are controlled to work. Since the target push seat 12 is fixed to the target push plate 13, and the target push plate 13 is fixed on the push cylinder and the slider 14, the target push plate 13 pushes the target push seat 12 forward, and the upper and lower water channel plugs on the target push seat 12 are respectively inserted into and fixed to the cooling water inlet jack 41 and the cooling water outlet jack 42 on the water sealing cover plate 40 on the back of the target 11.

[0075] After the target shooting is completed, the cooling water supply is stopped, the cylinder and the slider 14 are started again, the target push plate 13 drags the target push seat 12 to move backward, and the water plug of the target push seat 12 is disconnected from the cooling water inlet jack 41 and the cooling water outlet jack 42 of the target 11.

[0076] The stepper motor 24 is controlled again, and the stepper motor 24 continues to control the moving slider 29 to move forward, moving forward a distance of a target width, and pushing the next target body 39 into the target body accommodating cavity of the target body fixing device 9 in turn. At this time, the irradiated target body 11 in the target body fixing device 9 slides into the shielding cylinder 45 of the shielding tank mechanism through the target body slide 10.

[0077] Through the above method, the present invention can continuously irradiate multiple targets, and by replacing different target materials and energy reduction sheets (ie, sealing films 35), different radioactive nuclides can be produced in a set of experiments.

[0078] Furthermore, before the beam irradiates the target 11 , the shielding cylinder 45 is in a closed state, and the shielding cover 46 is placed on the shielding cylinder 45 .

[0079] When the shielding tank mechanism is started, the dragging mechanism 48 will move forward under the push of the translation cylinder 50, driving the front fork of the cover opening mechanism 47 to insert into the insertion port of the shielding cover 46, thereby fixing the shielding cover 46.

[0080] The lifting mechanism 49 is pushed up by the cylinder and then drives the cover opening mechanism 47 to rise, thereby opening the shielding cover 46 . At this time, the shielding cover 46 is located above the shielding cylinder 45 .

[0081] The dragging mechanism 48 moves backward under the influence of the retreat of the translation cylinder 50, driving the cover opening mechanism 47 to move the shielding cover 46 backward. At this time, the shielding cylinder 45 will be completely in an open state, completing the opening of the shielding cylinder.

[0082] After the irradiated target body 11 slides into the shielding cylinder 45 through the target body slideway 10 , the shielding tank mechanism is started again, and the dragging mechanism 48 moves forward under the push of the translation cylinder 50 . At this time, the shielding cover 46 is located above the shielding cylinder 45 .

[0083] The lifting mechanism 49 is dragged down by the cylinder, driving the cover opening mechanism 47 to descend, thereby causing the shielding cover 46 to be stuck on the shielding cylinder 45 .

[0084] The dragging mechanism 48 moves backward under the influence of the retreat of the translation cylinder 50, and the front fork of the cover opening mechanism 47 disengages from the insertion port of the shielding cover 46 and returns to the initial position. At this time, the shielding cylinder 45 will be completely in the shielding state, and the closing of the shielding cylinder 45 is completed.

[0085] Through the method, the present invention can completely realize the opening and closing of the shielding cylinder by remote control, which is convenient to operate, simple in structure, and can prevent the operator from being harmed by radiation.

[0086] It should be understood that although the various steps of the method are shown in sequence, these steps are not necessarily performed in the order indicated. Unless otherwise clearly stated in this article, the execution of these steps is not strictly limited in order, and these steps can be performed in other orders.

[0087] The solid target device and operation method for isotope production of the present invention realizes the compactness and beauty of the equipment, the stable operation of the structure, the effective improvement of the isotope production output, the full process automatic control, the simple operation, the convenient maintenance, the remote control of the opening and closing of the shielding cylinder, the convenient operation, the simple mechanism, and the avoidance of radiation damage to the operator. Continuous irradiation of multiple targets can produce different radioactive nuclides in a group of experiments.

[0088] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A solid target device for accelerator isotope production, characterized in that: The solid target device comprises at least a target positioning mechanism (100), a target mechanism (200), a target sliding mechanism (300), a target propulsion mechanism (400), a target clamping mechanism (500) and a shielding tank mechanism (600); the target positioning mechanism (100) is fixedly connected to the shielding tank mechanism (600) via the target sliding mechanism (300); wherein, The target positioning mechanism (100) comprises a vacuum isolation membrane fixing device (5), a target fixing device (9), and a helium flow distributor (7) sandwiched and fixed between the vacuum isolation membrane fixing device (5) and the target fixing device (9); The target body mechanism (200) comprises at least one target body (11), a target body dovetail slideway (8) for fixing the at least one target body (11), one side of the target body fixing device (9) is fixedly connected to the target body dovetail slideway (8), and the other side of the target body fixing device (9) opposite to the target body is fixedly connected to the target body sliding mechanism (300); The target body propulsion mechanism (400) comprises a target body propulsion base (23), a movable slider (29) arranged on the target body propulsion base (23), and a target pushing plate (25) fixed on the movable slider (29), wherein the target pushing plate (25) is used to push at least one target body (11) to move toward a target body fixing device (9); The target body clamping mechanism (500) comprises a target body push seat (12), a target body push plate (13) fixed outside the target body push seat (12), and a push cylinder and a slide block (14) for fixing the target body push plate (13).

2. The solid target device according to claim 1, characterized in that: Vacuum isolation membranes (6, 61) are respectively arranged on both sides of the helium flow distributor (7); the target fixing device (9), the helium flow distributor (7), the vacuum isolation membrane fixing device (5) and the two vacuum isolation membranes (6, 61) are fixed as a whole by a plurality of fixing bolts (19, 20, 21, 22); the vacuum isolation membrane fixing device (5) is provided with a helium inlet (4), a helium outlet (3), a first channel and a second channel; the first channel is respectively connected to the helium inlet (4) and the helium flow distributor (7), and the second channel is connected to the helium outlet (3).

3. The solid target device according to claim 2, characterized in that: The vacuum isolation membrane fixing device (5) is extended with a collimating channel (2), and one end of the collimating channel (2) is further extended with a connecting flange (1), and the connecting flange (1) is fixedly connected to the beam port. Preferably, the target fixing device (9) is provided with a target accommodating cavity, the target sliding-out mechanism (300) comprises a target slideway (10), the target accommodating cavity is communicated with the target slideway (10), the target slideway (10) is arranged at an angle, and the end position of the target sliding-out mechanism (300) connected to the target positioning mechanism (100) is higher than the end position of the target sliding-out mechanism (300) connected to the shielding tank mechanism (600).

4. The solid target device according to claim 1, characterized in that: The target body comprises a microchannel cooling base (331), a target material (34), a sealing film (35) and a wire ring (36) which are arranged in sequence. A dovetail groove is provided at the bottom of the microchannel cooling base (331). The entire target body is installed through the dovetail groove and moves on the target body dovetail slideway (8). A water sealing cover plate (40) is also fixed to one side of the microchannel cooling base (331). A cooling water inlet jack (41) and a cooling water outlet jack (42) are provided on the surface of the water sealing cover plate (40). Preferably, two water channel plugs are provided on the front surface of the target push seat (12), and the two water channel plugs are arranged up and down, and their positions correspond to the cooling water inlet jack (41) and the cooling water outlet jack (42) on the surface of the water sealing cover plate (40) respectively.

5. The solid target device according to claim 4, characterized in that: The side of the target push seat (12) is also provided with a compressed gas inlet (15) and a compressed gas outlet (16), the side of the push cylinder and the slider (14) is also provided with a cooling water inlet (17) and a cooling water outlet (18), and the target positioning mechanism (100) is installed and fixed on the push cylinder and the slider (14).

6. The solid target device according to claim 1, characterized in that: The target body propulsion mechanism (400) further comprises a stepper motor (24) fixed on the target body propulsion base (23), a lead screw (28) connected to the stepper motor (24), and slide bars (27) arranged on both sides of the lead screw (28), wherein the lead screw (28) drives the movable slide bar (29) to move forward and backward along the direction of the slide bar (27), and the stepper motor (24) controls the movable slide bar (29) to move a distance each time that is the same as the width of a target body. Preferably, a first limit switch (30) and a second limit switch (31) are also provided on the target body propulsion base (23), and the first limit switch (30) and the second limit switch (31) limit the moving position of the movable slider (29) on the slide rod (27).

7. The solid target device according to claim 1, characterized in that: The target pushing plate (25) comprises a fixing portion and a pushing portion, wherein the fixing portion is fixed to the upper surface of the movable slider (29), the pushing portion is arranged perpendicular to the fixing portion, and one end of the pushing portion extends out of the edge of the fixing portion to form a recessed portion in contact with the target body (11), the target pushing plate is fitted with the outermost target bodies arranged in sequence, and the side surfaces of the target bodies are accommodated in the recessed portion.

8. The solid target device according to claim 1, characterized in that: The shielding tank mechanism (600) comprises a shielding cylinder (45), a shielding cover (46) mounted on the shielding cylinder (45), a cover opening mechanism (47), and a dragging mechanism (48) and a lifting mechanism (49) for controlling the movement of the cover opening mechanism (47); an insertion port is provided on the shielding cover (46), and a front fork of the cover opening mechanism (47) is inserted into the insertion port; the dragging mechanism (48) controls the horizontal movement of the cover opening mechanism (47), and the lifting mechanism (49) controls the vertical movement of the cover opening mechanism (47). Preferably, the shielding tank mechanism (600) further comprises a shielding cylinder positioning plate (44) and a supporting structure (43), the shielding cylinder body (45) is arranged on the shielding cylinder positioning plate (44), and the shielding cylinder positioning plate (44) is fixed on the supporting structure (43).

9. A method for operating the solid target device for accelerator isotope production according to any one of claims 1 to 8, characterized in that: The following steps are involved: The moving slide block is controlled to move forward by a stepping motor (24), and the target push plate (25) pushes the target located at the front of the target dovetail slideway (8) into the target fixing device (9), so as to push the cylinder and the slide block (14) to work, and the target push plate (13) pushes the target push seat (12) forward, and the water channel plug on the target push seat (12) is respectively inserted into and fixed on the cooling water inlet jack (41) and the cooling water outlet jack (42) of the target; After the target shooting is completed, the cylinder and the slider (14) are pushed to start again, the target push plate (13) drags the target push seat (12) to move backward, the water channel plug is disconnected from the cooling water inlet jack (41) and the cooling water outlet jack (42), and the stepper motor continues to control the moving slider (29) to move forward, pushing the next target into the target fixing device (9) in turn, and the irradiated target in the target fixing device (9) slides into the shielding cylinder (45) of the shielding tank mechanism (600) through the target slideway (10).

10. The operating method according to claim 9, characterized in that: Before the beam irradiates the target, the shielding tank mechanism (600) is started, the dragging mechanism moves forward, driving the cover opening mechanism (47) to insert into the insertion opening of the shielding cover, the lifting mechanism (49) rises to drive the cover opening mechanism (47) to open the shielding cover (46), the dragging mechanism (48) moves backward, driving the cover opening mechanism (47) to move the shielding cover (46) backward, and the shielding cylinder (45) is opened; After the irradiated target body slides into the shielding cylinder, the shielding tank mechanism (600) is started again, the dragging mechanism (48) moves forward, the shielding cover is located above the shielding cylinder (45), the lifting mechanism (49) descends, the cover opening mechanism (47) drives the shielding cover to be locked on the shielding cylinder (45), the dragging mechanism (48) moves backward, the cover opening mechanism (47) is separated from the insertion port of the shielding cover, and the shielding cylinder (45) is closed.

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