Target-front proton beam detection imaging device
By designing a conical target and imaging device on the target, the proton beam flow distribution is monitored in real time, and the problem of target damage during high-strength current proton beam shooting is solved, extending the target life and simplifying the use process.
Patent Information
- Application Number
- CN202420290640.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-08
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-02-08
AI Technical Summary
During the high-strength current proton beam targeting process, cylindrical or elliptical targets are easily damaged due to the high power density of the proton beam, affecting the target life, and it is difficult for the prior art to effectively monitor and modulate the distribution of the proton beam.
A pre-target proton beam current detection imaging device is designed, using a conical target and an imaging device. The target surface is coated with fluorescent material, and the fluorescent light signals are received through the first and second imaging parts to form a two-dimensional distributed image. Monitor the location, beam spot size and density of the proton beam flow in real time.
By monitoring and analyzing the proton beam distribution in real time, the power density of the target surface can be reduced under the same beam diameter, prolong the target service life, and simplify the use process through reasonable structural design.
Smart Images
Figure CN222145240U_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of proton beam monitoring, and more particularly to a pre-target proton beam detection imaging device. Background Art
[0002] The spallation neutron source is a large scientific device that uses a high-intensity proton accelerator to accelerate protons to bombard heavy metal targets to produce high-intensity neutrons. The high-intensity neutron beam provided by the spallation neutron source can be used for scientific research in multiple disciplines such as nuclear physics, medicine, nanotechnology, and material chemistry. However, the high-intensity neutron beam requires a high-power proton beam to hit the target. Before the high-power proton beam is hit, the proton beam's target position, beam spot size, and proton density distribution must be modulated. If the proton beam hitting the target is unevenly distributed, it will affect the target's life.
[0003] Heavy metal targets are commonly used in cylindrical or elliptical targets. The problem is that the power of the proton beam hitting the target is large, but the diameter of the proton beam is limited. Under the same beam diameter, the power density hitting the cylindrical or elliptical target is large, which is more likely to cause damage to the target. Therefore, it is necessary to improve the heavy metal target, reduce the power density hitting the target surface, and monitor the proton beam distribution based on the improved target to facilitate its modulation. Summary of the invention
[0004] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.
[0005] Some embodiments of the present application propose a pre-target proton beam detection imaging device to solve the technical problems mentioned in the above background technology section.
[0006] Some embodiments of the present application provide a pre-target proton beam detection imaging device, comprising a target body and an imaging device, wherein the imaging device is arranged on one side of the target body, the target body is provided with a conical cavity, one end of the cavity is provided with an opening, the opening is close to the side where the imaging device is located, and the inner surface of the cavity is coated with fluorescent material.
[0007] Furthermore, the ratio of the height of the conical cavity in the length direction of the target body to the bottom diameter of the conical cavity is in the range of 2-5, wherein the height of the conical cavity in the length direction of the target body is in the range of 250mm to 1500mm, and the taper range of the conical cavity is 0.2 to 0.5.
[0008] Furthermore, the imaging device comprises a first imaging element and a second imaging element, and the first imaging element and the second imaging element are symmetrically arranged on two sides of the target body.
[0009] Furthermore, the first imaging element and the second imaging element are electrically connected to an image processing end.
[0010] Furthermore, the first imaging element includes a first reflector, a first lens group and a first industrial camera, and the first lens group is arranged on the reflection light path of the first reflector so that the first lens group can receive the fluorescence reflected by the first reflector.
[0011] Furthermore, the second imaging element includes a second reflector, a second lens group and a second industrial camera, and the second lens group is arranged on the reflection light path of the second reflector so that the second lens group can receive the fluorescence reflected by the second reflector.
[0012] Furthermore, the angle between the proton beam direction and the line connecting the centers of the first reflector and the second reflector and the vertex of the conical cavity of the target body is 7.7°.
[0013] Furthermore, the first reflector and the second reflector are made of aluminum, and the light aperture is 40 mm.
[0014] Furthermore, the first lens group and the second lens group both include a biconvex lens, a meniscus lens and a filter.
[0015] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:
[0016] (1) The pre-target proton beam detection imaging device of the present invention can perform real-time monitoring and imaging of high-energy proton beam bombardment of heavy metal targets to timely understand the operation status of the target body.
[0017] (2) The present invention adopts a conical target under the same beam diameter to increase the receiving area of the target and reduce the power density on the target surface, which is beneficial to reduce the risk of target damage and extend the service life of the target. In addition, its structural design is reasonable and the principle is simple, which is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.
[0019] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.
[0020] Figure 1 is a schematic cross-sectional view of a target according to an embodiment of the present application;
[0021] Figure 2 It is a schematic diagram of the overall structure of a pre-target proton beam detection imaging device according to an embodiment of the present application;
[0022] Figure 3 is a schematic diagram of the optical path of the second imaging element according to an embodiment of the present application;
[0023] Explanation of the symbols in the schematic diagram:
[0024] 100, target body; 110, cavity body;
[0025] 200, imaging device; 210, first imaging element; 211, first reflector; 212, first lens group; 213, first industrial camera; 220, second imaging element; 221, second reflector; 222, second lens group; 223, second industrial camera.
[0026] P1, biconvex lens; P2, meniscus lens; P3, meniscus lens; P4, filter. DETAILED DESCRIPTION
[0027] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.
[0028] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.
[0029] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.
[0030] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".
[0031] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.
[0032] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.
[0033] like Figures 1 to 3 As shown, a pre-target proton beam detection imaging device 200 of an embodiment of the present application includes a target body 100 and an imaging device 200, wherein the imaging device 200 is arranged on one side of the target body 100, and the target body 100 is provided with a conical cavity 110, wherein one end of the cavity 110 is provided with an opening, wherein the opening is close to the side where the imaging device 200 is located, and the inner surface of the cavity 110 is coated with a fluorescent material.
[0034] Specifically, a high-energy proton beam pipeline is provided on one side of the target body 100, and the high-energy proton beam pipeline can emit high-energy protons. The emission port of the high-energy proton beam pipeline is facing the target body 100. More specifically, the high-energy proton beam pipeline emits the high-energy proton beam into the cavity 110 of the target body 100 through the emission port. The high-energy proton beam is incident on the inner surface of the conical target body 100 coated with fluorescent material through the proton beam pipeline. The fluorescent material is excited by the proton beam to emit fluorescence, which is then received by the imaging device 200 disposed on one side of the target body 100, thereby displaying a two-dimensional distribution image of the inner surface of the target body 100. By observing and analyzing the two-dimensional distribution image, the operation status of the target 100, such as the position of the proton beam targeting, the beam spot size and the beam spot density, can be monitored in real time. In an practicable manner, the taper of the conical cavity 110 of the target 100 can be selected to be 0.2-0.4, the target 100 is made of titanium or special stainless steel, the proton beam diameter is preferably 100mm-300mm, and the taper size is determined by matching the proton beam diameter. The fluorescent material on the inner surface of the conical target 100 is aluminum oxide doped with 0.5% chromium, and the central wavelength of the emission spectrum is 694nm, which has good thermal stability and radiation resistance.
[0035] In a specific embodiment, the ratio of the height of the conical cavity 110 in the length direction of the target body 100 to the bottom diameter of the conical cavity 110 is in the range of 2-5, wherein the height range of the conical cavity 110 in the length direction of the target body 100 is 250mm~1500mm, and the taper range of the conical cavity 110 is 0.2~0.5.
[0036] Specifically, the height of the conical cavity 110 in the length direction of the target 100 is preferably 500 mm. The taper of the conical cavity 110 is preferably 0.2.
[0037] In a specific embodiment, the imaging device 200 includes a first imaging element 210 and a second imaging element 220, and the first imaging element 210 and the second imaging element 220 are symmetrically arranged on both sides of the target 100. The first imaging element 210 and the second imaging element 220 are electrically connected to the image processing end. The first imaging element 210 includes a first reflector 211, a first lens group 212 and a first industrial camera 213, and the first lens group 212 is arranged on the reflection light path of the first reflector 211 so that the first lens group 212 can receive the fluorescence reflected by the first reflector 211. The second imaging element 220 includes a second reflector 221, a second lens group 222 and a second industrial camera 223, and the second lens group 222 is arranged on the reflection light path of the second reflector 221 so that the second lens group 222 can receive the fluorescence reflected by the second reflector 221.
[0038] Specifically, the first imaging element 210 and the second imaging element 220 are symmetrically arranged on both sides of the target body 100, and the physical parameters of the first reflector 211, the first lens group 212 and the first industrial camera 213 of the first imaging element 210 are the same as the second reflector 221, the second lens group 222 and the second industrial camera 223 of the second imaging element 220. The high-energy proton beam excites the fluorescent powder coated on the inner surface of the conical target to emit fluorescence. The inner surface of the conical target body 100 is divided into an upper half and a lower half. The fluorescent powder coated on the upper half of the inner surface of the conical target body 100 is reflected by the first reflector 211 and then passes through the first lens group 212 to enter the first industrial camera 213 to form an image of the upper half; the fluorescent powder coated on the lower half of the inner surface of the conical target body 100 is reflected by the second reflector 221 and then passes through the second lens group 222 to enter the second industrial camera 223 to form an image of the lower half.
[0039] Since the first imaging element 210 and the second imaging element 220 are electrically connected to the image processing end, the image of the upper half and the image of the lower half are synthesized into one image at the image processing end, and a complete two-dimensional distribution image of the inner surface of the conical target 100 is displayed on the display end. By observing and analyzing the two-dimensional distribution image, the operation status of the target 100, such as the position of the proton beam targeting, the beam spot size and the beam spot density, can be monitored in real time.
[0040] In a specific embodiment, the angle between the line connecting the center of the first reflector 211 and the second reflector 221 and the vertex of the conical cavity 110 of the target 100 and the proton beam direction is 7.7°. The first reflector 211 and the second reflector 221 are made of aluminum, and the aperture is 40 mm.
[0041] Specifically, the first reflector 211 and the second reflector 221 are made of aluminum, whose reflectivity is greater than 90%. In order to achieve radiation resistance, the surfaces of the first reflector 211 and the second reflector 221 are not coated.
[0042] More specifically, the object planes of the first lens group 212 and the second lens group 222 are designed with an inclination angle, and the size of the inclination angle is determined according to the taper size of the cone and the angle between the line connecting the cone vertex and the center of the first reflector 211 or the second reflector 221 and the proton beam direction. The image planes of the first lens group 212 and the second lens group 222 are determined according to the optical design optimization results. The design band of the first lens group 212 and the second lens group 222 is 674-714nm, and the optical materials used are radiation-resistant materials calcium fluoride and Corning 7980. The first industrial camera 213 and the second industrial camera 223 include Balser ace series industrial cameras with GigE interfaces.
[0043] In a specific embodiment, the first reflector 211 and the second reflector 221 are made of aluminum 6061, and the aperture is 40 mm; the working wavelength of the first lens group 212 and the second lens group 222 is 674 nm-714 nm, the object distance is 2643 mm, the object plane size is Φ100 mm, the full image height is 6.4 mm, and the filter is used to reduce optical chromatic aberration and improve the imaging quality of the lens. Other main parameters are shown in Table 1:
[0044] Table 1
[0045] Optical Components Component Type Material Thickness(mm) Clearance (mm) P1 Double convex lens Calcium Fluoride 9 30 P2 Meniscus lens Corning 7980 5 30 P3 Meniscus lens Corning 7980 4 30 P4 Optical Filters H-K9L 2.2 32
[0046] In addition, this embodiment only describes a conical target with a proton beam diameter of 100 mm and a taper of 0.2 and a proton beam monitoring imaging device using the conical target. Other similar methods are within the protection scope of this patent.
[0047] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.
Claims
1. A pre-target proton beam detection imaging device, characterized in that: It includes a target body and an imaging device, wherein the imaging device is arranged on one side of the target body. The target body is provided with a conical cavity, one end of the cavity is provided with an opening, the opening is close to the side where the imaging device is located, and the inner surface of the cavity is coated with fluorescent material.
2. The pre-target proton beam detection imaging device according to claim 1, characterized in that: The ratio of the height of the conical cavity in the length direction of the target body to the bottom diameter of the conical cavity is in the range of 2-5, wherein the height of the conical cavity in the length direction of the target body is in the range of 250mm to 1500mm, and the taper range of the conical cavity is 0.2 to 0.
5.
3. The pre-target proton beam detection imaging device according to claim 1 or 2, characterized in that: The imaging device comprises a first imaging element and a second imaging element, and the first imaging element and the second imaging element are symmetrically arranged on two sides of the target body.
4. The pre-target proton beam detection imaging device according to claim 3, characterized in that: The first imaging element and the second imaging element are electrically connected to the image processing end.
5. The pre-target proton beam detection imaging device according to claim 4, characterized in that: The first imaging element includes a first reflector, a first lens group and a first industrial camera. The first lens group is arranged on the reflection light path of the first reflector so that the first lens group can receive the fluorescence reflected by the first reflector.
6. The pre-target proton beam detection imaging device according to claim 5, characterized in that: The second imaging element includes a second reflector, a second lens group and a second industrial camera. The second lens group is arranged on the reflection light path of the second reflector so that the second lens group can receive the fluorescence reflected by the second reflector.
7. The pre-target proton beam detection imaging device according to claim 6, characterized in that: The angle between the proton beam direction and the line connecting the centers of the first reflector and the second reflector and the vertex of the conical cavity of the target body is 7.7°.
8. The pre-target proton beam detection imaging device according to claim 6, characterized in that: The first reflector and the second reflector are made of aluminum, and the aperture is 40 mm.
9. The pre-target proton beam detection imaging device according to claim 6, characterized in that: The first lens group and the second lens group both include a biconvex lens, a meniscus lens and a filter.