Tool for measuring size of beam cross section in accelerating tube
By designing a measuring fixture that includes a motor body and a limiting mechanism, the automatic switching and rapid fixing of multiple target plates inside the accelerator were realized, which solved the problem of cumbersome target plate replacement in the existing technology, improved measurement efficiency and accuracy, and reduced contamination inside the accelerator.
Patent Information
- Application Number
- CN202423227480.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-26
AI Technical Summary
In existing accelerators, beam measurements require cumbersome and time-consuming replacement of the fluorescent target sheet each time, which also contaminates the internal cavity of the accelerator, affecting measurement efficiency and accuracy.
Design a measuring fixture that includes a motor body, a target support frame, a lead screw, and a limiting mechanism. By controlling the moving frame and the lead screw structure with a motor, the fixture can automatically switch and quickly fix multiple targets, simplifying the target replacement process.
This improved the target replacement speed, reduced human interference, ensured measurement consistency and accuracy, and reduced contamination inside the accelerator.
Smart Images
Figure CN223770409U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of accelerator tube measuring devices, specifically a measuring tool for measuring the cross-sectional size of a beam inside an accelerator tube. Background Technology
[0002] Currently, accelerators are devices that use electromagnetic fields to accelerate charged particles to high energies. They are important equipment for studying atomic nuclei and elementary particles, and have wide applications in industry, agriculture, and healthcare. Cyclotron accelerators are characterized by continuous beams, high flux, low emission, and small footprint and compact structure, and are often used as particle sources in proton radiotherapy systems.
[0003] The beam measurement system is the primary monitoring tool for accelerators during commissioning and operation, often referred to as the accelerator's "eyes." The accuracy of the beam measurement system largely determines the degree of accelerator optimization. The beam itself is invisible and intangible; measuring it requires converting it into visible optical signals or processable electrical signals, which can provide feedback on some characteristics of the beam.
[0004] When measuring beam spot morphology, tools such as fluorescent targets and radiochromic films are needed. Just as a bullet's velocity decreases after passing through a target, a beam loses some energy as it passes through a fluorescent target. Some of this energy excites atoms in the target. These excited atoms are unstable and de-excited to a stable state, releasing this energy as light. Fluorescent targets utilize this characteristic of beams, transforming the invisible beam into a visible bright spot. On the fluorescent target, we can observe the shape and position of the beam spot, and we can also determine the beam intensity by observing changes in its brightness.
[0005] However, different fluorescent targets need to be selected according to the technical requirements of each measurement, and only one type of fluorescent target can be used for each measurement. Whenever a different set of requirements needs to be measured, the measurement assembly must be removed, the fluorescent target replaced, and the relevant test performed. Furthermore, the target points must be aligned during each installation to ensure the relative position of the assembly and that the electron beam passes precisely through the center of the target. The process of installing and replacing the assembly is cumbersome, time-consuming, and also causes some contamination to the internal cavity of the accelerator. Utility Model Content
[0006] The purpose of this invention is to provide a measuring tool for the cross-sectional size of a beam inside an acceleration tube, so as to solve the related problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution: A measuring fixture for the cross-sectional area of a beam inside an accelerating tube, comprising a motor body, a target support frame, and a lead screw. A motor bracket is mounted on one side of the target support frame, and the motor body is disposed inside the motor bracket. A linkage shaft is mounted on the output end of the motor body, and a lead screw is mounted on one end of the linkage shaft. The outer wall of the lead screw is fixed to the side wall of the target support frame by bearings. A guide rod is sleeved on the outer wall of the lead screw, and a movable frame that meshes with the outer wall of the guide rod is sleeved on the outer wall of the guide rod. The outer wall is fitted with a welded corrugated pipe. A target frame cavity is opened on one side of the target support frame, and a flange is provided on the outer wall of the target frame cavity. A threaded groove is opened inside the movable frame, and a target frame grid is provided inside the threaded groove. A screw that meshes with the threaded groove at the movable frame is installed on the outer wall of the target frame grid. An installation groove is opened inside the target frame grid, and a YAG target, an OTR target, and a CAL target are respectively arranged inside the installation groove. A limiting mechanism for fixing the position of the YAG target, OTR target, and CAL target is provided inside the target frame grid.
[0008] This technical solution provides a measuring fixture for the cross-sectional size of an accelerated stream in a tube, wherein a sealing ring is provided on the outer wall of the flange.
[0009] This technical solution provides a measuring fixture for the cross-sectional size of an accelerating beam. The limiting mechanism includes a positioning bolt, and the target frame grid has a threaded groove inside, with the positioning bolt inside the threaded groove.
[0010] This technical solution provides a measuring tool for the cross-sectional size of an accelerated beam inside a tube, wherein one end of the positioning bolt penetrates the inner wall of the target frame grid.
[0011] This technical solution provides a measuring fixture for the cross-sectional size of an accelerating tube beam. An OUT target is provided on one side of the target frame grid, and the inner wall of the OUT target meshes with the outer wall of the screw.
[0012] Compared with the prior art, this utility model provides a measuring fixture for the cross-sectional size of a beam inside an acceleration tube, which has the following advantages:
[0013] 1. This utility model controls the movement of the moving frame within the target holder cavity by controlling the motor body, thereby switching between the YAG target, OTR target, CAL target, and OUT target. This structure facilitates the simultaneous measurement of electron beams using multiple target pieces. The operation is performed on the motor body, reducing target switching time and improving measurement efficiency. There is no human interference during the replacement process, which improves the accuracy of target measurement and ensures the consistency of each measurement.
[0014] 2. This utility model fixes the OUT target to the outer wall of the screw at the target frame grid by rotating it. Then, the screw on the other side of the target frame grid is inserted into one end of the movable frame, which makes it easy to fix multiple target pieces at the movable frame. When it is necessary to insert the YAG target, OTR target and CAL target into the target frame grid, the positioning bolt is then turned to fix the target piece in the target frame grid, thereby quickly fixing the YAG target, OTR target and CAL target. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0016] Figure 2 This is a schematic diagram of the front sectional view of the present invention;
[0017] Figure 3 This is a schematic diagram of the main structure of this utility model;
[0018] Figure 4 This is a top-view cross-sectional structural diagram of the target frame grid and screw of this utility model.
[0019] In the diagram: 1. Motor body; 2. Motor bracket; 3. Linkage shaft; 4. Target support frame; 5. Welded bellows; 6. Target frame cavity; 7. Flange; 701. Sealing ring; 8. CAL target; 9. OTR target; 10. YAG target; 11. Lead screw; 12. Moving frame; 13. Guide rod; 14. Target frame grid; 15. OUT target; 16. Screw; 17. Positioning bolt. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Example 1, such as Figure 1-2As shown, this utility model provides a technical solution: a measuring fixture for the cross-sectional area of a beam inside an accelerating tube, comprising a motor body 1, a target support frame 4, and a lead screw 11. A motor bracket 2 is mounted on one side of the target support frame 4, and the motor body 1 is disposed inside the motor bracket 2. A linkage shaft 3 is mounted on the output end of the motor body 1, and a lead screw 11 is mounted on one end of the linkage shaft 3. The outer wall of the lead screw 11 is fixed to the side wall of the target support frame 4 by bearings. A guide rod 13 is sleeved on the outer wall of the lead screw 11, and a movable frame 12 that meshes with the outer wall of the guide rod 13 is sleeved on the outer wall of the guide rod 13. A welded corrugated pipe 5 is mounted on the outer wall of the movable frame 12. A target frame cavity 6 is provided on one side of the support frame 4, and a flange 7 is provided on the outer wall of the target frame cavity 6. A sealing ring 701 is provided on the outer wall of the flange 7. By starting the motor body 1, the linkage shaft 3 is rotated, thereby rotating the lead screw 11 and moving the moving frame 12 left and right on the outer wall of the target frame grid 14. Then the welded bellows 5 expands and contracts, so that the position of the target frame grid 14 is adjusted. The movement of the moving frame 12 in the target frame cavity 6 is controlled by the motor body 1, thereby switching the YAG target 10, OTR target 9, CAL target 8 and OUT target 15. This structure facilitates the use of multiple target pieces to measure the electron beam at one time.
[0022] Example 2, as Figure 1-4 As shown, this utility model provides a technical solution: a measuring fixture for measuring the cross-sectional area of a beam inside an accelerating tube, comprising a movable frame 12 with a threaded groove inside, and a target frame grid 14 disposed inside the threaded groove. A screw 16, engaging with the threaded groove in the movable frame 12, is mounted on the outer wall of the target frame grid 14. An installation groove is provided inside the target frame grid 14, and a YAG target 10, an OTR target 9, and a CAL target 8 are respectively disposed inside the installation groove. A limiting mechanism for fixing the positions of the YAG target 10, OTR target 9, and CAL target 8 is provided inside the target frame grid 14. The limiting mechanism includes a positioning bolt 17. The inside of the 4 is provided with a threaded groove, and a positioning bolt 17 is provided inside the threaded groove. One end of the positioning bolt 17 penetrates the inner wall of the target frame grid 14. By rotating the OUT target 15, it is fixed to the outer wall of the screw 16 at the target frame grid 14. Then, the screw 16 on the other side of the target frame grid 14 is inserted into one end of the movable frame 12, so as to fix multiple target pieces at the movable frame 12. When it is necessary to insert the YAG target 10, OTR target 9 and CAL target 8 into the target frame grid 14, the positioning bolt 17 is rotated to fix the target pieces in the target frame grid 14, thereby quickly fixing the YAG target 10, OTR target 9 and CAL target 8.
[0023] Working principle: First, connect the external power supply and install the fixed cross-sectional target onto the accelerator. When testing fluorescent target sheets of different resolutions, start the motor body 1 to drive the linkage shaft 3 to rotate. This causes the lead screw 11 to rotate, driving the moving frame 12 to move left and right on the outer wall of the target frame grid 14. This causes the welded bellows 5 to expand and contract, adjusting the position of the target frame grid 14 to facilitate the measurement of the beam cross-section inside the accelerating tube. The movement of the moving frame 12 within the target frame cavity 6 is controlled by the motor body 1, thereby switching the YAG target 10, OTR target 9, CAL target 8, and OUT target 15. This structure facilitates the simultaneous measurement of electron beams using multiple target sheets. Operation is performed on the motor body 1, reducing target sheet switching time and improving measurement efficiency. There is no human interference during the replacement process, improving the accuracy of target sheet measurements and ensuring consistency in each measurement.
[0024] By rotating the OUT target 15 to fix it to the outer wall of the screw 16 at the target frame grid 14, and then inserting the screw 16 on the other side of the target frame grid 14 into one end of the movable frame 12, it is easy to fix multiple target pieces at the movable frame 12. When it is necessary to insert the YAG target 10, OTR target 9 and CAL target 8 into the target frame grid 14, then turn the positioning bolt 17 to fix the target pieces in the target frame grid 14, thereby quickly fixing the YAG target 10, OTR target 9 and CAL target 8, which is convenient for quick installation and fixing.
[0025] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.
Claims
1. A tool for accelerating the measurement of the cross-section size of a beam in a tube, comprising a motor body (1), a target support frame (4) and a screw rod (11), characterized in that: The side of the target support frame (4) is provided with a motor support (2), and the inside of the motor support (2) is provided with a motor body (1), the output end of the motor body (1) is provided with a linkage shaft (3), one end of the linkage shaft (3) is provided with a lead screw (11), the outer wall of the lead screw (11) is fixed to the side wall of the target support frame (4) through a bearing, the outer wall of the lead screw (11) is provided with a guide rod (13), the outer wall of the guide rod (13) is provided with a moving frame body (12) engaged with the outer wall of the lead screw (11), the outer wall of the moving frame body (12) is provided with a welded corrugated pipe (5), one side of the target support frame (4) is provided with a target holder cavity (6), and the outer wall of the target holder cavity (6) is provided with a flange (7), the inside of the moving frame body (12) is provided with a threaded groove, and the inside of the threaded groove is provided with a target holder grid (14), the outer wall of the target holder grid (14) is provided with a screw rod (16) engaged with the threaded groove of the moving frame body (12), the inside of the target holder grid (14) is provided with a mounting groove, and the inside of the mounting groove is provided with a YAG target (10), an OTR target (9) and a CAL target (8), respectively, the inside of the target holder grid (14) is provided with a limiting mechanism for fixing the positions of the YAG target (10), the OTR target (9) and the CAL target (8).
2. The device for measuring the cross section of a beam in an accelerator tube according to claim 1, wherein: The outer wall of the flange (7) is provided with a sealing ring (701).
3. The device for measuring the cross section of a beam in an accelerator tube according to claim 1, wherein: The limiting mechanism comprises a positioning bolt (17), the inside of the target holder grid (14) is provided with a threaded groove, and the inside of the threaded groove is provided with a positioning bolt (17).
4. The device for measuring the cross section of a beam in an accelerator tube according to claim 3, wherein: One end of the positioning bolt (17) penetrates the inner wall of the target holder grid (14).
5. The device for measuring the cross section of a beam in an accelerator tube according to claim 1, wherein: One side of the target holder grid (14) is provided with an OUT target (15), and the inner wall of the OUT target (15) is engaged with the outer wall of the screw rod (16).