Neutron generation system, neutron imaging integrated device and neutron imaging integrated system

Abstract

The utility model discloses a neutron generation system, a neutron imaging integrated device and a neutron imaging integrated system. The neutron imaging integrated system comprises a neutron imaging integrated device and at least one CCD camera, and the neutron imaging integrated device comprises a neutron generation system used for generating neutrons, a first detector and a second detector. The neutron generation system comprises a first beam outlet along a first direction and a second beam outlet along a second direction; the first detector and the first beam outlet are oppositely arranged, and a first to-be-detected position is formed between the first beam outlet and the first detector; and the second detector is opposite to the second beam outlet. The neutron imaging integrated system has use scenes and advantages of a thermal neutron imaging system and / or a fast neutron imaging system and a neutron back scattering imaging technology, is wider in application field, can be selectively switched according to a detection object and a detection scene in an outdoor nondestructive detection operation process, and is higher in working efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of neutron photography, in particular to a neutron generation system, a neutron imaging integrated device and a neutron imaging integrated system. Background Art

[0002] Neutrons are one of the fundamental particles that make up the atomic nucleus. They are uncharged, possess a magnetic moment, and possess strong penetrating properties, enabling them to distinguish between light elements, isotopes, and neighboring elements. Compared to X-rays, neutron radiation can easily penetrate dense structures like reinforced concrete and metals, but it significantly attenuates some lightweight elements. Given these unique properties of neutrons, neutron radiography has recently emerged as a promising nondestructive testing technique, surpassing the limitations of other nondestructive testing techniques such as X-rays in inspecting hydrogen-containing materials, heavy metal components, and radioactive materials. Neutron radiography has begun to be applied in manufacturing, energy and chemical engineering, aerospace, national defense, and other fields closely related to national economic and social development, playing an increasingly important role.

[0003] In recent years, neutron radiography, as an emerging nondestructive testing method, has garnered increasing attention and attention. After years of development, neutron radiography has evolved into numerous types, categorized by neutron energy into thermal and fast neutron radiography. However, these neutron radiographs all employ a sandwich structure consisting of a neutron source, an object, and a detector. Neutrons are attenuated based on the composition and geometry of the object, and the detector collects and images the neutrons that have passed through it. This means that larger objects are difficult for neutrons to penetrate. Furthermore, in some situations, such as when the object is embedded in the ground, surrounded by walls, or other obstructing structures, detector placement becomes impossible. For example, asphalt and concrete structures in bridge components are often thick, making neutron transmission imaging inefficient. Detectors cannot be placed on the other side of the object, such as roads, railroad tracks, bridge piers, and tapered revetments.

[0004] In this case, neutron backscatter imaging technology is needed for detection. Neutron backscatter imaging differs from neutron photography in that the principle is that after the incident particles undergo one or more scatterings in the detected object, they overflow the detected object in the direction opposite to the incident direction and are collected by the detector. The detector measures the energy, angle and other distribution of the backscattered particles, and finally forms an image. This technology greatly improves the flexibility of neutron imaging and can effectively fill the gap in non-destructive testing of large components.

[0005] However, traditional detection devices typically only implement neutron radiography or neutron backscatter imaging. Neutron radiography lacks the ability to detect large or underground objects with neutron backscatter imaging. Neutron backscatter imaging also lacks the advantages of neutron radiography, especially fast neutron imaging, such as strong penetration, high spatial resolution, and high detection efficiency. The challenge is to combine the advantages of both technologies and flexibly switch between different imaging techniques for different detection scenarios during nondestructive detection. Utility Model Content

[0006] The purpose of the present utility model is to provide a neutron generation system, a neutron imaging integrated device and a neutron imaging integrated system, which combine the usage scenarios and advantages of both neutron photography and neutron backscatter imaging technologies, and are used for selection and switching according to the detection object and detection scene, with higher work efficiency.

[0007] The purpose of this utility model is achieved by the following technical solutions:

[0008] The present application provides a neutron generation system, which includes a shielding body, an ion source generating device, a beam component and a neutron generating target.

[0009] The ion source generating device is arranged in the shielding body and is used to generate a proton beam;

[0010] The beam component is arranged in the shielding body and is used to connect the ion source generating device and the neutron generating target;

[0011] The neutron generating target is arranged in the shielding body, and the proton beam bombards the neutron generating target to generate at least two first neutron beams and a second neutron beam with different directions.

[0012] Preferably, it further comprises a first moderation-collimation structure and a second moderation-collimation structure;

[0013] The first moderation-collimation structure is arranged along the direction of the first neutron beam;

[0014] The second moderation-collimation structure is arranged along the direction of the second neutron beam.

[0015] Preferably, the first moderation-collimation structure and / or the second moderation-collimation structure are an integrated structure.

[0016] Preferably, the first moderator-collimator structure and / or the second moderator-collimator structure is a split structure including a moderator and a collimator.

[0017] The present application also provides a neutron imaging integrated device, comprising a neutron generation system for generating neutrons, a first detector, and a second detector.

[0018] The neutron generating system includes a first beam outlet along a first direction and a second beam outlet along a second direction;

[0019] The first detector is arranged opposite to the first beam outlet, and a first position to be measured is formed between the first beam outlet and the first detector;

[0020] The second detector is arranged opposite to the second beam outlet.

[0021] Preferably, the width of the first position to be measured is adjustable along the first direction.

[0022] Preferably, the neutron generating system includes an ion source generating device, a beam component, and an inclined neutron generating target, which are sequentially connected and arranged in a shielding body; and further includes a first moderation-collimation structure and a second moderation-collimation structure;

[0023] The first beam outlet is located at the end of the first moderation-collimation structure; the second beam outlet is located at the end of the second moderation-collimation structure.

[0024] Preferably, a retractable cantilever is provided outside the shielding body, and a free end of the cantilever is connected to the first detector for adjusting the width of the first position to be measured along the first direction.

[0025] Preferably, a carrying platform is also included.

[0026] The shielding body is accommodated on the carrying platform; and / or,

[0027] The carrying platform is movable; and / or,

[0028] The cantilever is arranged on the carrying platform.

[0029] The present application further provides a neutron imaging integrated system, comprising the aforementioned neutron imaging integrated device and at least one CCD camera.

[0030] The CCD camera is connected to the first detector or the second detector.

[0031] Compared with the prior art, the beneficial effects of the present invention include at least:

[0032] The neutron generation system consists of a set of ion source generation devices, beam components, neutron generation targets and shielding bodies, which can generate at least two neutron beams in different directions. The corresponding neutron beams can be selected for imaging detection and other tasks according to actual needs. It can be applied to a variety of application scenarios and has stronger practical performance.

[0033] The neutron imaging integrated device can use at least two neutron beams in different directions generated by the neutron generation system for imaging detection. It can flexibly select a thermal neutron imaging system, a fast neutron imaging system, or a neutron backscattering imaging system according to the object to be detected at the work site, meet a variety of imaging detection scenarios, and improve the efficiency of non-destructive detection at the work site.

[0034] Furthermore, the neutron imaging integration system is integrated on the basis of the original single thermal neutron imaging system and / or fast neutron imaging system and neutron backscattering imaging based on the carrier platform, and can realize the thermal neutron imaging system and / or fast neutron imaging system and neutron backscattering imaging on the same platform, combining the use scenarios and advantages of the thermal neutron imaging system and / or fast neutron imaging system and neutron backscattering imaging technology, with a wider range of applications. During outdoor non-destructive detection operations, it can be selected and switched according to the detection object and detection scene, with higher work efficiency. The integration of the two systems saves space and shielding materials, has good economic benefits, and meets the requirements of high efficiency, flexibility and comprehensiveness during outdoor non-destructive testing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic structural diagram of a neutron imaging integrated system according to an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the internal structure of the carrying platform of an embodiment of the utility model;

[0037] Figure 3 This is a schematic cross-sectional view of the neutron imaging integrated system according to an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the working state of the neutron imaging integrated system according to an embodiment of the present utility model;

[0039] Figure 5 This is a schematic diagram of the working state of the neutron imaging integrated system using the thermal neutron imaging and / or fast neutron imaging system according to an embodiment of the present utility model;

[0040] Figure 6 This is a schematic diagram of the working state of the neutron backscatter imaging system used in the neutron imaging integrated system of the embodiment of the utility model.

[0041] In the figure: 1. Carrying platform; 2. Ion source generating device; 3. Beam component; 4. Neutron generating target; 5. Shielding body; 6. First moderator-collimator structure; 7. First shielding component; 8. Cantilever; 9. First detector; 10. Optical fiber; 11. CCD camera; 12. Road; 13. Oil pipe; 14. Shielding plate; 15. Support member; 16. Second detector; 17. First position to be measured; 18. Second moderator-collimator structure; 19. Second shielding component; 20. Second position to be measured. DETAILED DESCRIPTION

[0042] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make this disclosure more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. Identical reference numerals in the figures denote identical or similar structures, and thus repeated descriptions thereof will be omitted.

[0043] The words expressing positions and directions described in this utility model are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of this utility model.

[0044] First, refer to Figures 3 to 6 The present application provides a neutron generation system, comprising a shield 5, an ion source generator 2, a beam generator 3, and a neutron generation target 4. The shield 5 can be formed by nesting multiple layers of boxes of varying volumes. Specifically, the multiple layers are formed by nesting boxes of varying volumes in ascending order. In a specific application, the box structure is made of shielding material, capable of shielding the proton beam within the ion source generator 2, the beam generator 3, and the neutron generation target 4, thereby reducing radiation to the surrounding environment.

[0045] Specifically, the ion source generating device 2 is disposed in the shielding body 5 and is used to generate a proton beam. The ion source generating device 2 may be a small ion generator, or a medium or large ion generator according to actual needs, and this is not limited here.

[0046] The beam piece 3 is arranged in the shielding body 5, and is used to connect the ion source generating device 2 and the neutron generating target 4, so that the proton beam flows in the beam piece 3; wherein, the beam piece 3 can use a beam pipe, and the beam pipe is designed with shielding materials to reduce the leakage of the proton beam during the propagation process and protect the staff and equipment from radiation. The neutron generating target 4 is arranged in the shielding body 5, and the proton beam bombards the neutron generating target 4 to generate at least two first neutron beams and second neutron beams with different directions. Specifically, the beam piece 3 has two ends, one end of which is connected to the outlet of the ion source generating device 2, and the other end is connected to the neutron generating target 4. The ion source generating device 2 bombards the neutron generating target 4 with the generated proton beam through the beam piece 3 to generate the first neutron beam and the second neutron beam with different directions. In actual application, refer to Figure 4 The first neutron beam and the second neutron beam generated by the neutron generating target 4 can be arranged perpendicular to each other.

[0047] In some embodiments, reference Figures 3 to 6The neutron generation system can also include a first moderator-collimator structure 6 and a second moderator-collimator structure 18. The first moderator-collimator structure 6 is positioned along the direction of the first neutron beam to optimize the first neutron beam; the second moderator-collimator structure 18 is positioned along the direction of the second neutron beam to optimize the second neutron beam. This improves the energy and spatial distribution of the neutron beams, ensuring that the first and second neutron beams are emitted at appropriate angles and intensities.

[0048] In this embodiment, the first moderator-collimator structure 6 and / or the second moderator-collimator structure 18 can be an integrated structure. That is, the moderator and collimator are integrated into a single structure. The moderator and collimator are designed as a single unit, and by selecting appropriate materials and geometric shapes, they can simultaneously achieve neutron moderation and collimation. The advantages of this design are compact structure, reduced neutron loss during the moderation and collimation processes, and generally improved overall system efficiency.

[0049] Alternatively, the first moderator-collimator structure 6 and / or the second moderator-collimator structure 18 can also be a split structure comprising a moderator and a collimator. Specifically, the moderator and collimator are designed as two separate components, placed at different locations within the system. In this design, the moderator reduces the energy of neutrons, making them more suitable for imaging or experiments, while the collimator controls the direction of neutron propagation to ensure imaging quality. The advantage of this design is that the optimal moderator material and collimator shape can be selected based on different experimental requirements, making the system more flexible and enabling optimization of system performance for different application scenarios.

[0050] Therefore, the neutron generation system has a set of ion source generation device 2, beam component 3, neutron generation target 4 and shielding body 5, which can generate at least two neutron beams in different directions. The corresponding neutron beam can be selected according to actual needs for imaging detection and other tasks. It can be applied to a variety of application scenarios and has stronger practical performance.

[0051] Secondly, refer to Figures 1 to 6 The present application also provides a neutron imaging integrated device, comprising a neutron generation system, a first detector 9, and a second detector 16. The first detector 9 and the second detector 16 may be scintillator position sensitive detectors. When the neutron imaging integrated device is in operation, the scintillator position sensitive detectors may release fluorescence signals after receiving signals.

[0052] It should be noted that the scintillator material of the scintillator position sensitive detector can be selected from inorganic crystals (such as sodium iodide NaI, bismuth germanium oxide BGO), plastic scintillators (such as polybutylene terephthalate PBST) and liquid scintillators (such as styrene derivatives) according to specific needs.

[0053] Specifically, the neutron generating system includes a first beam outlet along a first direction and a second beam outlet along a second direction; wherein, the neutron generating system includes an ion source generating device 2, a beam component 3, and an inclined neutron generating target 4 which are connected in sequence and arranged in a shielding body 5; and also includes a first moderation-collimation structure 6 and a second moderation-collimation structure 18; the first moderation-collimation structure 6 and the second moderation-collimation structure 18 both have a head end and an end end, the head end is used to allow the first neutron beam and the second neutron beam to enter the first moderation-collimation structure 6 and the second moderation-collimation structure 18, respectively, and the end end is used to emit the first neutron beam and the second neutron beam, respectively.

[0054] It should be noted that the first direction is the emission direction of the first neutron beam, and the first moderation-collimation structure 6 is arranged along the first direction; the second direction is the emission direction of the second neutron beam, and the second moderation-collimation structure 18 is arranged along the second direction.

[0055] The first beam outlet is located at the end of the first moderator-collimator structure 6; the second beam outlet is located at the end of the second moderator-collimator structure 18. In practical applications, the first and second beam outlets can respectively accommodate a first shielding member 7 and a second shielding member 19. This seals the first and second moderator-collimator structures 6 and 18, ensuring cleanliness within the collimation channel and radiation safety at the work site.

[0056] In some embodiments, the neutron imaging integrated device includes at least a thermal neutron imaging system and / or a fast neutron imaging integrated system for imaging a first neutron beam emitted from a first beam outlet, and a neutron backscattering imaging system for imaging a second neutron beam emitted from a second beam outlet.

[0057] It should be noted that the first shielding member 7 and the second shielding member 19 can be equipped with adaptable and detachable shielding pistons, so that the first beam outlet and the second beam outlet can be sealed through the corresponding shielding pistons in any non-working state of the thermal neutron imaging system, the fast neutron imaging system and the neutron backscattering imaging system of the neutron imaging integrated device.

[0058] Furthermore, the conversion between a thermal neutron imaging system and a fast neutron imaging system can be achieved by installing and adjusting the first moderator-collimator structure 6 based on the actual beam requirements of the object being inspected. This allows the first neutron beam to be tailored to the characteristics of the object being inspected, resulting in better imaging results. In practice, the conversion between a thermal neutron imaging system and a fast neutron imaging system can be achieved by adjusting the thickness of the moderator in the first moderator-collimator structure 6. The thickness of the moderator affects the neutron moderation efficiency. Adjusting the moderator thickness can control the neutron energy distribution, thereby converting fast neutrons into thermal neutrons. Specifically, an appropriate thickness ensures that fast neutrons are effectively decelerated as they pass through the moderator, reaching the desired energy range.

[0059] The first detector 9 is arranged opposite to the first beam outlet, and a first detection position 17 is formed between the first beam outlet and the first detector 9 . In practical applications, the first detection position 17 is used to place the object to be detected, such as a petroleum pipe 13 .

[0060] It should be noted that the size of the first detector 9 needs to be larger than the size of the first beam outlet of the first moderation-collimation structure 6 to ensure that the first detector 9 of the thermal neutron imaging system and / or the fast neutron imaging system can receive most of the neutrons emitted through the first beam outlet and transmitted through the detected object, such as the oil pipe 13.

[0061] The second detector 16 is arranged opposite to the second beam outlet, and is located below the second beam outlet. Below the second detector 16 is a second detection position 20. In actual application, the second detection position 20 is used to detect the object to be detected, such as the road 12, rails or bridges.

[0062] It should be noted that the size of the second detector 16 is larger than the size of the second beam outlet of the second moderation-collimation structure 18, ensuring that the second detector 16 of the neutron backscatter imaging system can receive most of the neutrons emitted through the second beam outlet and reflected by the detected objects such as the road 12, rails or bridges, while also preventing the scattered neutrons from re-entering the collimation channel of the second moderation-collimation structure 18.

[0063] In addition, the second detector 16 also has the ability to record flight time. The second detector 16 can obtain information about the internal structure of the object being detected by measuring and analyzing the time it takes for neutrons to reach the detector after being reflected from the object being detected.

[0064] In some embodiments, reference Figure 1 、 Figure 3 and Figure 5 A retractable cantilever 8 is disposed outside the shielding body 5. The free end of the cantilever 8 is connected to the first detector 9 and is used to adjust the width of the first detection location 17 along the first direction. Specifically, the retractable cantilever 8 can adjust the distance between the first detector 9 and the first beam outlet, so that the object to be detected, such as a petroleum pipe fitting 13, can be placed at the first detection location 17. This allows imaging measurement of objects of various sizes. At the same time, the distance between the first detector 9 and the first beam outlet can be adjusted to ensure imaging quality.

[0065] In some embodiments, reference Figures 1 to 3The neutron imaging integrated device may further include a carrier platform 1. It should be noted that the carrier platform 1 is movable, such as a truck or other self-movable equipment in the prior art. Alternatively, the carrier platform 1 may be a non-self-movable device and, in actual use, may be placed on a movable device to indirectly achieve the movement of the neutron imaging integrated device. This is not a sole limitation.

[0066] The supporting platform 1 of the neutron imaging integrated device in this application is explained using a truck as an example. The supporting platform 1 has a relative front and rear, as well as a relative top and bottom. It is defined based on the truck: the front direction of the truck is the front, the rear direction is the rear, the roof direction is the top, and the bottom direction is the bottom.

[0067] Specifically, the carrier platform 1 has a chamber, with the shielding body 5 housed within it. Shielding panels 14 can be installed around the perimeter of the chamber to enhance the shielding performance of the carrier platform 1, reduce the radiation exposure of the neutron imaging integrated device to the surrounding environment, and ensure safety at the work site. A first moderator-collimator structure 6 extends through the chamber wall of the carrier platform 1 and communicates with the outside world. A second moderator-collimator structure 18 also extends through the chamber wall of the carrier platform 1 and communicates with the outside world.

[0068] In this embodiment, referring to Figures 1 to 3 When a truck is selected as the supporting platform 1 of the neutron imaging integrated device, the shielding body 5 is set in the truck compartment. The first direction can be a horizontal direction set from the front to the rear of the truck, and the second direction is a vertical direction set from the top to the bottom of the truck. The first beam outlet is preferably set at the rear of the truck, and the second beam outlet is preferably set at the bottom of the truck.

[0069] In a specific application, refer to Figure 5 The first moderator-collimator structure 6 is mounted horizontally on the truck. A support frame for the first moderator-collimator structure 6 can be installed inside the truck compartment to provide greater structural stability. The first detector 9 is coaxially positioned with the first moderator-collimator structure 6. Thus, the first detector 9 and the first moderator-collimator structure 6 are coaxially positioned horizontally. When the thermal neutron imaging system and / or the fast neutron imaging system is in operation, the object to be inspected, such as a petroleum pipe 13, can be positioned on the horizontal axis between the first detector 9 and the first moderator-collimator structure 6. This creates a sandwich structure of the thermal neutron imaging system and / or the fast neutron imaging system: neutron source, object to be inspected, and first detector 9. This allows for imaging and measurement of the petroleum pipe 13 at specific angles.

[0070] It should be noted that when the thermal neutron imaging system and / or the fast neutron imaging system are operating, the object to be inspected remains stationary, and the truck (carrying platform 1) can also rotate. The movable (carrying) platform rotates around the object to be inspected with the scintillator position sensitive detector, so that the thermal neutron imaging system and / or the fast neutron imaging system can rotate around the oil pipe 13 at the first position to be measured 17, and can also realize circumferential imaging measurement of the oil pipe 13.

[0071] In a specific application, refer to Figure 6 The second moderator-collimator structure 18 is vertically mounted on the truck, and the second detector 16 is coaxially mounted with the second moderator-collimator structure 18. Thus, the second detector 16 and the second moderator-collimator structure 18 are coaxially mounted vertically, so that the second moderator-collimator structure 18 of the neutron backscatter imaging system and the first moderator-collimator structure 6 of the thermal neutron imaging system and / or the fast neutron imaging system are perpendicular to each other. When the neutron backscatter imaging system is operating, the truck (carrying platform 1) can move forward or backward in a straight line, enabling the truck (carrying platform 1) to travel over an inspected object, such as a road 12, railroad track, or bridge, allowing imaging measurements of a distance between the second position to be measured 20 below the second detector 16 and the inspected object as it passes over the road 12, railroad track, or bridge.

[0072] It should be noted that the truck (movable platform) can also remain stationary, so that the position of the road 12, rails or bridge at the second test position 20 remains unchanged, and imaging measurement of the specific structure of the test object can be achieved.

[0073] In addition, a support member 15 may be provided between the truck (carrying platform 1) and the second detector 16 to secure the second detector 16 at the second beam outlet. In practical applications, the support member 15 may utilize components known in the art, such as trusses, to secure the second detector 16 at the second beam outlet. However, it should be noted that when the second detector 16 is installed below the carrying platform 1 at the second beam outlet, it must be maintained at a certain height distance from the object being detected, such as the road 12, rails, and bridges, to prevent the object from damaging the second detector 16 while the carrying platform 1 is moving.

[0074] In this embodiment, the telescopic cantilever 8 can be fixedly installed on the top of the truck, so that the cantilever 8 can be telescoped relative to the shielding body 5 to achieve relative position adjustment between the first detector 9 and the first beam outlet.

[0075] Therefore, the neutron imaging integrated device can use at least two neutron beams in different directions generated by the neutron generation system for imaging detection, and flexibly select a thermal neutron imaging system, a fast neutron imaging system or a neutron backscattering imaging system according to the object to be detected at the work site, to meet a variety of imaging detection scenarios and improve the non-destructive detection efficiency at the work site.

[0076] Thirdly, refer to Figure 1 、 Figure 3 and Figure 4 The present application further provides a neutron imaging integrated system, including a neutron imaging integrated device and at least one CCD camera 11.

[0077] Specifically, the CCD camera 11 is connected to the first detector 9 or the second detector 16 for imaging the first detector 9 and / or the second detector 16. Figure 4 The first detector 9 and / or the second detector 16 can be respectively connected to the CCD camera 11 through two optical fibers 10.

[0078] It should be noted that, in actual applications, the installation position of the CCD camera 11 in the system is relatively flexible, but it is necessary to ensure that the signal connection between the first detector 9 and the second detector 16 and the CCD camera 11 maintains low signal attenuation, so that the thermal neutron imaging system and / or fast neutron imaging system and the neutron backscatter imaging system maintain high imaging quality.

[0079] Among them, the thermal neutron imaging system and / or fast neutron imaging system of the neutron imaging integrated system includes an ion source generating device 2, a beam component 3, a neutron generating target 4, a shielding body 5, a first moderation-collimation structure 6, a first detector 9, an optical fiber 10 and a CCD camera 11. The first neutron beam flowing in the horizontal direction generated by the neutron generating target 4 is optimized by the first moderation-collimation structure 6 and irradiated onto the object to be detected, such as an oil pipe 13. After receiving the transmitted first neutron beam, the first detector 9 is connected to the CCD camera 11 through a bundle of optical fibers 10 to realize a method of imaging measurement of the object to be detected.

[0080] The neutron backscatter imaging system of the neutron imaging integrated system includes an ion source generating device 2, a beam component 3, a neutron generating target 4, a shielding body 5, a second moderation-collimation structure 18, a second detector 16, an optical fiber 10 and a CCD camera 11. The second neutron beam generated by the neutron generating target 4 and flowing in the vertical direction is optimized through the second moderation-collimation structure 18 to irradiate the detected object, such as a road 12, a railway track or a bridge. After receiving the reflected second neutron beam, the second detector 16 is connected to the CCD camera 11 through another bundle of optical fibers 10 to realize another method of imaging measurement of the detected object.

[0081] Therefore, the neutron imaging integrated system is integrated on the basis of the original single thermal neutron imaging system and / or fast neutron imaging system and neutron backscattering imaging based on the carrier platform 1, and can realize the thermal neutron imaging system and / or fast neutron imaging system and neutron backscattering imaging on the same platform, combining the use scenarios and advantages of the thermal neutron imaging system and / or fast neutron imaging system and neutron backscattering imaging technology, with a wider range of applications. During outdoor non-destructive detection operations, selection and switching can be made according to the detection object and detection scene, with higher work efficiency. The integration of the two systems saves space and shielding materials, has good economic benefits, and meets the requirements of high efficiency, flexibility and comprehensiveness during outdoor non-destructive testing operations.

[0082] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limiting the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the utility model without departing from the principles and purpose of the utility model. All of these changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A neutron generating system, characterized in that: include: Shielding body (5); An ion source generating device (2), the ion source generating device (2) being arranged in the shielding body (5) and being used for generating a proton beam; A beam component (3), the beam component (3) being arranged in the shielding body (5) and being used to connect the ion source generating device (2) and the neutron generating target (4); A neutron generating target (4) is provided in the shielding body (5), and the proton beam bombards the neutron generating target (4) to generate at least two neutron beams, a first neutron beam and a second neutron beam, with different directions.

2. The neutron generation system according to claim 1, characterized in that Also includes: a first moderation-collimation structure (6), wherein the first moderation-collimation structure (6) is arranged along the direction of the first neutron beam; A second moderation-collimation structure (18) is provided along the direction of the second neutron beam.

3. The neutron generation system according to claim 2, characterized in that: The first slowing-down and collimating structure (6) and / or the second slowing-down and collimating structure (18) are an integrated structure.

4. The neutron generating system according to claim 2, characterized in that: The first slowing-down and collimating structure (6) and / or the second slowing-down and collimating structure (18) are split structures including a moderator and a collimator.

5. A neutron imaging integrated device, characterized in that: include: A neutron generating system for generating neutrons, the neutron generating system comprising a first beam outlet along a first direction and a second beam outlet along a second direction; a first detector (9), the first detector (9) being arranged opposite to the first beam outlet, with a first position to be measured (17) being formed between the first beam outlet and the first detector (9); A second detector (16), wherein the second detector (16) is arranged opposite to the second beam outlet.

6. The neutron imaging integrated device according to claim 5, characterized in that: The first position to be measured (17) is adjustable in width along a first direction.

7. The neutron imaging integrated device according to claim 5, characterized in that: The neutron generating system comprises an ion source generating device (2), a beam component (3), and an inclined neutron generating target (4) which are arranged in sequence and connected in a shielding body (5); and further comprises a first moderation-collimation structure (6) and a second moderation-collimation structure (18); The first beam outlet is located at the end of the first slowing-collimating structure (6); and the second beam outlet is located at the end of the second slowing-collimating structure (18).

8. The neutron imaging integrated device according to claim 7, characterized in that: A telescopic cantilever (8) is provided outside the shielding body (5), and a free end of the cantilever (8) is connected to the first detector (9) for adjusting the width of the first position to be measured (17) along the first direction.

9. The neutron imaging integrated device according to claim 8, characterized in that: Also includes: A carrying platform (1), wherein the shielding body (5) is accommodated on the carrying platform (1); and / or, The carrying platform (1) is movable; and / or, The cantilever (8) is arranged on the carrying platform (1).

10. A neutron imaging integrated system, characterized in that: include: The neutron imaging integrated device according to any one of claims 5 to 9; At least one CCD camera (11), wherein the CCD camera (11) is connected to the first detector (9) or the second detector (16).

Images