Frontal collimator, radiation source assembly and diffractive detection system

Abstract

The application provides a front alignment device, a ray source assembly and a diffraction detection system. The front alignment device comprises a plurality of shielding sections, the plurality of shielding sections are connected in sequence along a first direction, the plurality of shielding sections comprise a first shielding section and a last shielding section, the first shielding section is the first shielding section in the plurality of shielding sections along the first direction, and the last shielding section is the last shielding section in the plurality of shielding sections along the first direction. A first collimating member is located at one end of the first shielding section away from the last shielding section along the first direction. A second collimating member is located at one end of the last shielding section away from the first shielding section along the first direction. The first collimating member comprises a first collimating slit, the second collimating member comprises a second collimating slit, each shielding section comprises a shielding cavity, the shielding cavities of the shielding sections are located between the first collimating slit and the second collimating slit, and the plurality of shielding sections can move relative to each other along the first direction to adjust the distance between the first collimating slit and the second collimating slit along the first direction.

Description

Technical Field

[0001] This application relates to the field of X-ray detection and diffraction detection technology, and more specifically, to a pre-collimation device, a X-ray source assembly, and a diffraction detection system. Background Technology

[0002] In X-ray diffraction, diffraction patterns are highly sensitive to changes in angle. Angle aliasing can lead to reduced energy resolution, further affecting the resolution and identification of the diffraction pattern. Therefore, the beamwidth (the width of the X-ray beam in space) needs to be strictly controlled during diffraction. However, for some needs, such as experimental research, multiple adjustments to the beamwidth are required. In existing X-ray diffraction system designs, the beamwidth is usually fixed and cannot be adjusted. Changing the beamwidth typically requires replacing corresponding components offline, which is inconvenient and cannot meet research needs. Summary of the Invention

[0003] In view of at least one of the above-mentioned technical problems, this application provides a front alignment device, comprising: a plurality of shielding sections, the plurality of shielding sections being sequentially sleeved and connected along a first direction, the plurality of shielding sections including a first-stage shielding section and a last-stage shielding section, the first-stage shielding section being the first shielding section along the first direction, and the last-stage shielding section being the last shielding section along the first direction; a first alignment member, the first alignment member being located at the end of the first-stage shielding section away from the last-stage shielding section along the first direction; and a second alignment member, the second alignment member being located at the end of the last-stage shielding section away from the first-stage shielding section along the first direction, wherein the first alignment member includes a first alignment slit, the second alignment member includes a second alignment slit, each of the shielding sections includes a shielding cavity, the shielding cavity of each of the shielding sections being located between the first alignment slit and the second alignment slit; the plurality of shielding sections are capable of relative movement in the first direction to adjust the distance between the first alignment slit and the second alignment slit along the first direction.

[0004] According to one embodiment of this application, each of the shielding sections includes a cylindrical body and a shielding layer, the shielding layer being disposed on the inner wall surface of the cylindrical body, and the shielding layer at least partially surrounding the shielding cavity.

[0005] According to one embodiment of this application, the two adjacent shielding sections include a first shielding section near the first collimator and a second shielding section near the second collimator. The outer wall surface of the cylinder of the first shielding section and the inner wall surface of the shielding layer of the second shielding section are both gradually widened along a first direction to restrict the relative movement of the first shielding section and the second shielding section along the first direction.

[0006] According to one embodiment of this application, the outer wall surface of the cylinder of the first shielding section is at least partially a non-rotational surface, and the inner wall surface of the shielding layer of the second shielding section is at least partially a non-rotational surface, so as to restrict the relative rotational movement of the first shielding section and the second shielding section about a first direction.

[0007] According to one embodiment of this application, the front alignment device further includes a shielding ring; in adjacent first and second shielding sections, at least one of the shielding rings is disposed at one end of the first shielding section near the second alignment member, the shielding layer of the second shielding section surrounds the shielding ring, and the shielding ring includes a ring channel that connects the shielding cavity of the first shielding section and the shielding cavity of the second shielding section.

[0008] According to one embodiment of this application, in adjacent first shielding sections and second shielding sections, a first gap is formed between the outer wall surface of the shielding ring disposed on the first shielding section and the inner wall surface of the shielding layer of the second shielding section. The first gap has a first width in a second direction perpendicular to the first direction, and the shielding ring has a first thickness along the first direction. The ratio of the first width to the first thickness is less than a first proportional threshold.

[0009] According to one embodiment of this application, the front alignment device further includes: an end cap, the end cap being detachably disposed at one end of the final stage shielding section near the second collimator, the end cap having a first through hole, at least one of the shielding rings being disposed between the final stage shielding section and the end cap, and abutting against the shielding layer of the final stage shielding section; the shielding ring disposed between the final stage shielding section and the end cap having an extension portion, the extension portion being disposed on the inner wall surface of the first through hole.

[0010] According to one embodiment of this application, the front alignment device further includes: a first reinforcing member, a second alignment member disposed between the first reinforcing member and the end cap, and one end of the extension portion facing the second alignment member abutting against the second alignment member.

[0011] According to one embodiment of this application, the first collimator is movably connected to the first-stage shielding section along the height direction, and the first collimator is detachably connected to the first-stage shielding section to restrict the movement of the first collimator along the height direction; the second collimator is movably connected to the last-stage shielding section along the height direction, and the second collimator is detachably connected to the last-stage shielding section to restrict the movement of the second collimator along the height direction.

[0012] According to one embodiment of this application, the front alignment device further includes: a first connector, wherein the first alignment member has a first elongated hole extending along the height direction, the first alignment member is detachably connected to the first-stage shielding section through the first connector passing through the first elongated hole, and the first connector is used to move along the height direction in the first elongated hole; and a second connector, wherein the second alignment member has a second elongated hole extending along the height direction, the second alignment member is detachably connected to the last-stage shielding section through the second connector passing through the second elongated hole, and the second connector is used to move along the height direction in the second elongated hole.

[0013] According to one embodiment of this application, the front alignment device further includes: a first adjusting screw for driving the first alignment member to move along the height direction; and a second adjusting screw for driving the second alignment member to move along the height direction.

[0014] This application also provides a radiation source assembly, including: the aforementioned pre-collimation device; a radiation source for emitting a radiation beam; the pre-collimation device being located downstream of the radiation source along the radiation beam propagation direction, wherein a plurality of shielding sections in the pre-collimation device are capable of relative movement along the radiation beam propagation direction to adjust the distance between the first collimation slit and the second collimation slit along the radiation beam propagation direction, thereby adjusting the beam width of the radiation beam emitted from the pre-collimation device.

[0015] According to one embodiment of this application, the radiation source assembly further includes: a first support, on which the first-stage shielding section of the front alignment device and the radiation source are mounted; a second support, on which the last-stage shielding section of the front alignment device is mounted; and a linear guide rail, which is arranged along the direction of radiation beam propagation, wherein the first support and / or the second support are movably mounted on the linear guide rail.

[0016] According to one embodiment of this application, the radiation source assembly further includes: a driving device; and a transmission structure, wherein the driving device is connected to the transmission structure to drive the first support and / or the second support to move on the linear guide rail.

[0017] This application also provides a diffraction detection system, comprising: the aforementioned X-ray source assembly; and a detector for receiving X-rays emitted through the second collimating slit and diffracted by the object to be examined.

[0018] In the pre-collimation device according to the embodiments of this application, the relative movement between the shielding sections along the first direction is achieved through the sleeve connection between multiple shielding sections. This allows the first collimator disposed on the first-stage shielding section and the second collimator disposed on the last-stage shielding section to move relative to each other along the first direction, thereby adjusting the distance between the first collimation slit and the second collimation slit in the first direction and adjusting the beam width of the X-ray beam emitted from the second collimation slit. The adjustment process is relatively convenient and flexible, and there is no need to disassemble or assemble parts offline. It can better adapt to the need for frequent beam width adjustment and is especially suitable for application in experimental research operations of X-ray diffraction. Attached Figure Description

[0019] The above and other objects, features and advantages of this application will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0020] Figure 1 This is a side cross-sectional structural diagram of the front alignment device according to some exemplary embodiments of this application;

[0021] Figure 2 This is a side cross-sectional view of the front alignment device in a pulled-out state according to some exemplary embodiments of this application;

[0022] Figure 3 This is a side cross-sectional view of two adjacent shielding sections in a front-end device according to some exemplary embodiments of this application;

[0023] Figure 4 This is a top view of the front alignment device according to some exemplary embodiments of this application;

[0024] Figure 5 It is based on Figure 2 Enlarged structural schematic diagram of point I in the side view cross-sectional structural diagram of the mid-front alignment device;

[0025] Figure 6 It is based on Figure 2 A schematic diagram of the front alignment device from a perspective of the opposite direction along the first direction;

[0026] Figure 7 This is a side view of a radiation source assembly according to some exemplary embodiments of this application;

[0027] Figure 8 This is a side view schematic diagram of a diffraction detection system according to some exemplary embodiments of this application. Detailed Implementation

[0028] The embodiments of this application will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of this application. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of this application for ease of explanation. However, it will be apparent that one or more embodiments may be implemented without these specific details. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this application.

[0029] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0030] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0031] When using expressions such as "at least one of A, B and C", they should generally be interpreted in accordance with the meaning that is commonly understood by those skilled in the art (e.g., "a system having at least one of A, B and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B and C, etc.).

[0032] X-ray diffraction (XRD) utilizes the wave nature of X-rays to achieve coherent enhancement in a specific direction through the ordered molecular lattice structure. Incident X-rays are multicolor light; after irradiating an object, at a specific diffraction angle, only photons with energies satisfying the Bragg equation will produce corresponding coherent superposition peaks. Therefore, the corresponding coherent superposition energy can be measured using an energy spectrum detector. Different objects have different diffraction patterns, thus this technique has high specificity. In XRD, the diffraction pattern is sensitive to changes in angle; angle aliasing can cause problems such as reduced energy resolution of the diffraction pattern, further affecting the resolution and identification of the diffraction pattern. Therefore, the beam width needs to be strictly controlled during the diffraction process. However, for some needs, such as experimental research, multiple adjustments to the beam width are required. In existing XRD system designs, the beam width is usually fixed and cannot be adjusted. Changing the beam width usually requires replacing corresponding components offline, which is inconvenient and cannot meet research needs. Therefore, embodiments of this application provide a pre-collimation device, a X-ray source assembly, and a diffraction detection system.

[0033] Figure 1 This is a side cross-sectional view of the front alignment device according to some exemplary embodiments of this application. Figure 2 This is a side cross-sectional view of the front alignment device in a pulled-out state according to some exemplary embodiments of this application.

[0034] Combination Figures 1 to 2 As shown, the first aspect of this application provides a front alignment device 100, including: a plurality of shielding sections 1, which are sequentially sleeved and connected along a first direction, the plurality of shielding sections 1 including a first-level shielding section 11 and a last-level shielding section 12, the first-level shielding section 11 being the first shielding section 1 along the first direction, and the last-level shielding section 12 being the last shielding section 1 along the first direction; and a first alignment member 2, which is located at the end of the first-level shielding section 11 away from the last-level shielding section 12 along the first direction; The second collimator 3 is located at the end of the final shielding section 12 away from the first shielding section 11 along the first direction. The first collimator 2 includes a first collimation slit 21, and the second collimator 3 includes a second collimation slit 31. Each shielding section 1 includes a shielding cavity 101, and the shielding cavity 101 of each shielding section 1 is located between the first collimation slit 21 and the second collimation slit 31. The multiple shielding sections 1 can move relative to each other in the first direction to adjust the distance between the first collimation slit 21 and the second collimation slit 31 along the first direction.

[0035] In this embodiment, taking X-ray diffraction as an example, the shielding section 1 mainly serves to shield against X-ray radiation. Specifically, the shielding effect can be achieved using materials such as lead or lead alloys. In the actual diffraction detection process, the first direction is the propagation direction of the X-ray beam, which can be referenced in this embodiment. Figure 1 and Figure 2 As shown, the first direction has a positive and a negative direction. The positive direction is from the first collimator 2 towards the second collimator 3, and the negative direction is from the second collimator 3 towards the first collimator 2. Taking three shielding sections 1 as an example, the first shielding section 1 along the first direction is the primary shielding section 11, and the third and last shielding section 1 along the first direction is the secondary shielding section 12. The first collimator 2 can be installed, for example, by bolts, on the end of the primary shielding section 11 that is away from the secondary shielding section 12 along the first direction (i.e.,...). Figure 1 and Figure 2 From the view shown, the first collimator 2 is located at the left end of the first-stage shielding section 11 (or at the left end of the first-stage shielding section 11), or is positioned away from the last-stage shielding section 12 along the first direction by other fixing methods (e.g., by supporting and fixing with an additional bracket). The second collimator 3 can be installed at the end of the last-stage shielding section 12 away from the first-stage shielding section 11 along the first direction by means of, for example, bolts (i.e.,...). Figure 1 and Figure 2 From the perspective shown, the second collimator 3 is located at the right end of the final shielding section 12 (or at the right end of the final shielding section 12), or is located at the end of the final shielding section 12 away from the first shielding section 11 along the first direction by other fixing methods (e.g., by supporting and fixing with an additional bracket).

[0036] Each shielding section 1 has a shielding cavity 101. The specific shapes of the shielding section 1 and the shielding cavity 101 are not specifically limited in this embodiment and can be selected according to actual needs. The first collimator 2 includes a first collimation slit 21, and the second collimator 3 includes a second collimation slit 31. The specific dimensional parameters of the first collimation slit 21 and the second collimation slit 31 can be designed according to actual needs and will not be described here.

[0037] The process of adjusting the beam width of the front alignment device 100 according to an embodiment of this application is described below with reference to the accompanying drawings.

[0038] from Figures 1 to 2 The process is the process of the front alignment device 100 in this application embodiment being stretched to the pull-out state. By applying force to the shielding section 1, the first alignment member 2 and / or the second alignment member 3, relative movement can be achieved through the sleeve connection between multiple shielding sections 1, so that the two adjacent shielding sections 1 move away from each other, thereby increasing the distance between the first alignment slit 21 and the second alignment slit 31 along the first direction, which is equivalent to increasing the depth of the alignment slit, changing the depth-to-width ratio of the alignment slit, and reducing the width (beam width) of the ray beam emitted from the second alignment slit 31.

[0039] from Figures 2 to 1 The process is the shortening process of the front alignment device 100 in this application embodiment. By applying force to the shielding section 1, the first alignment member 2 and / or the second alignment member 3, relative movement can be achieved through the sleeve connection between multiple shielding sections 1, so that the two adjacent shielding sections 1 move towards each other, thereby reducing the distance between the first alignment slit 21 and the second alignment slit 31 along the first direction, which is equivalent to reducing the depth of the alignment slit and changing the depth-to-width ratio of the alignment slit, so that the beam width of the ray beam emitted from the second alignment slit 31 increases.

[0040] Understandable Figure 1 and Figure 2 The distance along the first direction between the first alignment seam 21 and the second alignment seam 31 shown is only an example of two states; in actual work, it can also be shown in... Figure 1 and Figure 2 Based on the above, the distance between the first collimation slit 21 and the second collimation slit 31 along the first direction is further increased or decreased to obtain a wider beam surface.

[0041] In the pre-collimation device 100 according to the embodiments of this application, the relative movement between the shielding sections 1 along the first direction is achieved through the sleeve connection between the multiple shielding sections 1. This allows the first collimator 2 disposed on the first-stage shielding section 11 and the second collimator 3 disposed on the last-stage shielding section 12 to move relative to each other along the first direction, thereby adjusting the distance between the first collimation slit 21 and the second collimation slit 31 in the first direction and adjusting the beam width of the X-ray beam emitted from the second collimation slit 31. The adjustment process is relatively convenient and flexible, and there is no need to disassemble and assemble parts offline. It can better adapt to the need for frequent beam width adjustment and is especially suitable for application in experimental research operations of X-ray diffraction.

[0042] Furthermore, each shielding section 1 includes a cylinder 102 and a shielding layer 103, the shielding layer 103 being disposed on the inner wall surface of the cylinder 102, and the shielding layer 103 at least partially surrounding the shielding cavity 101.

[0043] In the embodiments of this application, combined with Figure 1 and Figure 2 As shown, the cylinder 102 has an inner cavity. A shielding layer 103 can be set on the inner wall of the cylinder 102 by any connection method such as embedding or welding. The shielding layer 103 can be made of lead or lead alloy or other materials with shielding effect. The cylinder 102 can be made of a metal material with good rigidity as a structural support. The shielding cavity 101 surrounded by the shielding layer 103 can accommodate the radiation beam to pass through, and the shielding layer 103 plays a shielding and protective role against radiation.

[0044] The cylindrical body 102 in this embodiment can improve the structural strength and rigidity of the shielding section 1. The shielding layer 103 surrounds the shielding cavity 101, thereby achieving a shielding protection effect against radiation and improving safety.

[0045] Figure 3 This is a side cross-sectional view of two adjacent shielding sections in a front-end device according to some exemplary embodiments of this application.

[0046] Furthermore, the two adjacent shielding sections 1 include a first shielding section 1A near the first collimator 2 and a second shielding section 1B near the second collimator 3. The outer wall surface of the cylinder 102 of the first shielding section 1A and the inner wall surface of the shielding layer 103 of the second shielding section 1B are both gradually widened along the first direction to restrict the relative movement of the first shielding section 1A and the second shielding section 1B along the first direction.

[0047] In the embodiments of this application, such as Figure 2 Of the three shielding sections 1 shown, any two adjacent shielding sections 1 correspond to Figure 3 As shown, Figure 2Of the two adjacent shielding sections 1, the shielding section 1 closer to the first collimator 2 is the first shielding section 1A, and the shielding section 1 closer to the second collimator 3 is the second shielding section 1B, corresponding to... Figure 3 As shown, among two adjacent shielding sections 1, along the first direction, they are the first shielding section 1A and the second shielding section 1B in sequence.

[0048] It should be understood that, such as Figures 1 to 2 The front alignment device 100 shown includes three shielding sections 1, but the specific number of shielding sections 1 is not limited to this, and more shielding sections 1 can be set as needed.

[0049] In this embodiment, the first shielding section 1A and the second shielding section 1B are described and distinguished according to the relative positional relationship between the shielding sections 1, referring to any two shielding sections 1 that are adjacent to each other among a plurality of shielding sections 1. Combined with Figure 1 and Figure 2 As shown, in the front alignment device 100 of this application embodiment, there are two pairs of adjacent shielding sections 1 among the three shielding sections 1. The first shielding section 1 and the second shielding section 1 along the first direction form an adjacent relationship and can be used as the first shielding section 1A and the second shielding section 1B, respectively. The second shielding section 1 and the third shielding section 1 along the first direction form an adjacent relationship and can be used as the first shielding section 1A and the second shielding section 1B, respectively.

[0050] Furthermore, the first-stage shielding section 11 and the last-stage shielding section 12 are described and distinguished according to the order of shielding section 1, referring to the first shielding section 1 and the last shielding section 1 along the first direction among multiple shielding sections 1. Combined with... Figure 1 and Figure 2 As shown, in the front-end device 100 of this application embodiment, the first shielding section 1 along the first direction (forward direction) is the first-level shielding section 11, and the third shielding section 1 is the last-level shielding section 12.

[0051] Furthermore, it can be understood that when describing the adjacency relationship between shielding sections 1, if the first-level shielding section 11 and the last-level shielding section 12 are involved, then the first-level shielding section 11 and the last-level shielding section 12 have the following adjacency relationships: the first-level shielding section 11 can form an adjacency relationship with the second shielding section 1 along the first direction, that is, the first-level shielding section 11 is the first shielding section 1A, and the second shielding section 1 along the first direction is the second shielding section 1B; the last-level shielding section 12 can form an adjacency relationship with the second shielding section 1 along the opposite direction of the first direction (equivalent to the penultimate shielding section 1, in... Figure 1 and Figure 2Of the three shielding sections 1 shown, the second shielding section 1 along the first direction is adjacent to each other, i.e., the last-level shielding section 12 is the second shielding section 1B, and the second shielding section 1 along the opposite direction of the first direction is the first shielding section 1A. Furthermore, if no specific shielding section 1 is specified, then in the adjacent first shielding section 1A and second shielding section 1B, the first shielding section 1A can be any shielding section 1 other than the last-level shielding section 12, and the second shielding section 1B can be any shielding section 1 other than the first-level shielding section 11.

[0052] Figure 4 This is a top view of the front alignment device according to some exemplary embodiments of this application.

[0053] Combined with reference Figure 3 and Figure 4 In two adjacent shielding sections, the outer wall surface of the cylinder 102 of the first shielding section 1A is gradually widened along the first direction, and the inner wall surface of the shielding layer 103 of the second shielding section 1B is also gradually widened along the first direction. In this embodiment, combined with Figure 4 As shown, at least a portion of the outer wall surface of the cylinder 102 of the first shielding section 1A is configured as a tapered surface that gradually expands along the first direction, and at least a portion of the inner wall surface of the shielding layer 103 of the second shielding section 1B is configured as a tapered surface that gradually expands along the first direction. Figure 4 (The inner wall surface of the shielding layer 103 of the second shielding section 1B is not shown in the diagram). When a pair of adjacent shielding sections 1 move away from each other along the first direction, until the outer wall surface of the cylinder 102 of the first shielding section 1A and the inner wall surface of the shielding layer 103 of the second shielding section 1B achieve a conical fit, the pair of adjacent shielding sections 1 are restricted by the conical fit and cannot continue to move away from each other, that is, the linear relative movement of the first shielding section 1A and the second shielding section 1B along the first direction is restricted.

[0054] It is understandable that this only limits the outer wall surface of the cylinder 102 of the first shielding section 1A and the inner wall surface of the shielding layer 103 of the second shielding section 1B to be gradually expanded along the first direction. It does not limit the further shape and structure of the outer wall surface of the cylinder 102 and the inner wall surface of the shielding layer 103. The specific shape and structure can be selected according to the needs of the corresponding structural design. For example, the outer wall surface of the cylinder 102 and the inner wall surface of the shielding layer 103 can be set as a cone surface, or the outer wall surface of the cylinder 102 and the inner wall surface of the shielding layer 103 can be set as a frustum surface (that is, the surface formed by multiple trapezoidal sides of the frustum excluding the top and bottom surfaces, and the extension lines of its multiple edges can intersect at the same point). As long as the structure conforms to the design of gradually expanding along the first direction, it is acceptable.

[0055] Furthermore, the outer wall surface of the cylindrical body 102 of the first shielding section 1A and the inner wall surface of the shielding layer 103 of the second shielding section 1B can be of matching shapes, that is, both adopt the same shape design (in the previous embodiment, the outer wall surface of the cylindrical body 102 of the first shielding section 1A and the inner wall surface of the shielding layer 103 of the second shielding section 1B both adopt the same shape design). More specifically, the outer wall surface of the cylindrical body 102 of the first shielding section 1A and the inner wall surface of the shielding layer 103 of the second shielding section 1B can also adopt different shape designs. For example, the outer wall surface of the cylindrical body 102 of the first shielding section 1A is a conical surface, and the inner wall surface of the shielding layer 103 of the second shielding section 1B is a frustum surface. This can also achieve a gradually expanding shape design, and to a certain extent, it can also limit the relative movement of the first shielding section 1A and the second shielding section 1B along the first direction.

[0056] The outer wall of the cylinder 102 of the first shielding section 1A and the inner wall of the shielding layer 103 of the second shielding section 1B provided in this application embodiment are gradually extended along the first direction, which limits the relative distance between the first shielding section 1A and the second shielding section 1B along the first direction, and avoids the first shielding section 1A and the second shielding section 1B from accidentally separating when adjusting the distance between the first collimation slit 21 and the second collimation slit 31 along the first direction; it can also realize the force transmission between adjacent shielding sections 1, ensuring that the length of multiple shielding sections 1 can gradually increase, and making it more convenient to adjust the beam width.

[0057] Furthermore, the outer wall surface of the cylinder 102 of the first shielding section 1A is at least partially a non-rotational surface, and the inner wall surface of the shielding layer 103 of the second shielding section 1B is at least partially a non-rotational surface, so as to restrict the relative rotational movement of the first shielding section 1A and the second shielding section 1B about the first direction.

[0058] Combination Figure 3 As shown, from a side view, the outer wall surface of the cylindrical body 102 portion of the first shielding section 1A and the inner wall surface of the shielding layer 103 portion of the second shielding section 1B are arranged substantially parallel to the first direction, while in combination with... Figure 4 As shown, from a top-down perspective, the outer wall surface of the cylindrical body 102 of the first shielding section 1A and the inner wall surface of the shielding layer 103 of the second shielding section 1B (the shielding layer 103 is not shown in the figure) both have a certain inclination relative to the first direction. This makes the outer wall surface of the cylindrical body 102 of the first shielding section 1A and the inner wall surface of the shielding layer 103 of the second shielding section 1B form a non-rotational surface (a rotational surface is an axisymmetric curved surface generated by rotating the generatrix around the axis, while a non-rotational surface is a surface that cannot be generated by rotating the generatrix around the axis). This non-rotational surface design restricts the relative rotational movement of the first shielding section 1A and the second shielding section 1B around the first direction after they are nested together.

[0059] It is understood that the conical surface mentioned above is one embodiment of a surface of revolution, and the frustum surface mentioned above is one embodiment of a surface of non-revolution. The specific shape and structure of the non-revolutionary surface can be designed according to needs, and no further limitations are made here.

[0060] The outer wall surface of the cylinder 102 of the first shielding section 1A and the inner wall surface of the shielding layer 103 of the second shielding section 1B provided in this application embodiment adopt a non-rotational surface design, which restricts the relative rotational movement between adjacent first shielding sections 1A and second shielding sections 1B along the first direction, ensuring the stability of each shielding section 1 and avoiding affecting the collimation effect.

[0061] Furthermore, the front alignment device 100 also includes a shielding ring 4. In the adjacent first shielding section 1A and second shielding section 1B, at least one shielding ring 4 is disposed at the end of the first shielding section 1A near the second alignment member 3, and the shielding layer 103 of the second shielding section 1B surrounds the shielding ring 4. The shielding ring 4 includes an annular channel 41, which connects the shielding cavity 101 of the first shielding section 1A and the shielding cavity 101 of the second shielding section 1B.

[0062] Combination Figures 1 to 2 As shown, each shielding section 1 in this embodiment of the application is provided with a corresponding shielding ring 4. Combined with... Figure 3 and Figure 4 As shown, in the adjacent first shielding section 1A and second shielding section 1B, a shielding ring 4 is disposed at the end of the first shielding section 1A near the second collimator 3 (i.e., at the positive end of the first shielding section 1A along the first direction). The shielding layer 103 of the second shielding section 1B surrounds the shielding ring 4, and the annular channel 41 of the shielding ring 4 connects the shielding cavity 101 of the adjacent first shielding section 1A and the shielding cavity 101 of the second shielding section 1B. It is understood that the number of shielding rings 4 can be set according to the actual shielding protection requirements, and the number is not limited here.

[0063] The shielding ring 4 in this embodiment can shield the gap formed between two adjacent shielding sections 1, thereby providing further radiation shielding protection.

[0064] Figure 5 It is based on Figure 2 Enlarged structural schematic diagram of point I in the side view cross-sectional structural diagram of the mid-front alignment device.

[0065] Furthermore, in the adjacent first shielding section 1A and second shielding section 1B, a first gap 5 is formed between the outer wall surface of the shielding ring 4 disposed on the first shielding section 1A and the inner wall surface of the shielding layer 103 of the second shielding section 1B. The first gap 5 has a first width a in a second direction perpendicular to the first direction, and the shielding ring 4 has a first thickness b along the first direction. The ratio of the first width a to the first thickness b is less than a first proportional threshold.

[0066] Combination Figure 1 , Figure 2 and Figure 5 As shown, in the adjacent first shielding section 1A and second shielding section 1B, the first shielding section 1A is provided with a shielding ring 4 at one end near the second collimator 3. A first gap 5 is formed between the inner wall surface of the shielding layer 103 of the second shielding section 1B and the outer wall surface of the shielding ring 4 provided on the first shielding section 1A. This first gap 5 has a first width a in a second direction perpendicular to the first direction. The shielding ring 4 provided on the first shielding section 1A has a first thickness b along the first direction. The ratio of the first width a to the first thickness b, i.e., a / b, is less than a first proportional threshold. The first proportional threshold can be set to 1 / 10, or its specific threshold value can be designed as needed.

[0067] The second direction here can be understood as the radial direction with the first direction as the axis. In other words, the second direction is any direction in the plane perpendicular to the first direction. This ensures that the shielding ring 4 can maintain a / b in each part to meet the first ratio threshold requirement.

[0068] Furthermore, in this embodiment, when adjusting the beam width, the relative movement of each shielding section 1 in the first direction may cause the first width a to change, i.e., the first width a varies within a range, while the first thickness b is a dimensional parameter of the shielding ring 4, which usually remains constant during the beam width adjustment process. It should be understood that during this process, the ratio of any value of the first width a to the first thickness b within this range is less than a first proportional threshold.

[0069] By ensuring that the ratio of the first width a of the first gap 5 to the first thickness b of the shielding ring 4 meets the requirement of the first proportional threshold provided in the embodiments of this application, the shielding performance at the first gap 5 between adjacent shielding sections 1 can be improved, thereby providing further radiation shielding protection.

[0070] Furthermore, the front alignment device 100 also includes: an end cap 6, which is detachably disposed at one end of the final shielding section 12 near the second alignment member 3. The end cap 6 has a first through hole 61. At least one shielding ring 4 is disposed between the final shielding section 12 and the end cap 6 and abuts against the shielding layer 103 of the final shielding section 12. The shielding ring 4 disposed between the final shielding section 12 and the end cap 6 has an extension 42, which is disposed on the inner wall surface of the first through hole 61.

[0071] Combination Figure 1 and Figure 2 As shown, the end cap 6 can be detachably connected to the end of the final shielding section 12 near the second collimator 3 (i.e., the end of the final shielding section 12 along the first direction) by means of connection such as bolts or snap-fit. The end cap 6 has a first through hole 61, and a shielding ring 4 is disposed between the final shielding section 12 and the end cap 6. The shielding ring 4 also abuts against the shielding layer 103 of the final shielding section 12, thereby forming a more complete shield. The shielding ring 4 located between the final shielding section 12 and the end cap 6 also has an extension 42, which extends into the first through hole 61 of the end cap 6, thereby being disposed on the inner wall surface of the first through hole 61. The shielding ring 4 located between the final shielding section 12 and the end cap 6 includes an annular channel 41, which connects the shielding cavity 101 of the final shielding section 12 and the second collimator 31.

[0072] The detachable end cap 6 provided in this application embodiment improves the ease of assembly and disassembly between multiple shielding sections 1. Other shielding sections 1 can be placed into the shielding cavity 101 of the final shielding section 12 for sequential installation, and then the end cap 6 can be installed to install the front alignment device 100, or the end cap 6 can be removed to remove each shielding section 1 sequentially to disassemble the front alignment device 100. The shielding ring 4 and extension 42 provided between the final shielding section 12 and the end cap 6 can improve the radiation shielding protection performance.

[0073] Furthermore, the front alignment device 100 also includes: a first reinforcing member 7, a second alignment member 3 disposed between the first reinforcing member 7 and the end cap 6, and an extension 42 abutting against the second alignment member 3 at one end facing the second alignment member 3.

[0074] Combination Figure 1 and Figure 2 As shown, the first reinforcing member 7 can typically be made of metal or other materials with high rigidity. The second aligning member 3 is disposed between the first reinforcing member 7 and the end cap 6. The end cap 6, the second aligning member 3, and the first reinforcing member 7 can be connected by any connection method such as bolts, snap-fit, or welding. The end of the extension 42 facing the second aligning member 3 (i.e., the positive end of the extension 42 along the first direction) abuts against the second aligning member 3. The first reinforcing member 7 is preferably configured as a ring structure, that is, the first reinforcing member 7 is provided with a second through hole 71, which communicates with the second aligning slot 31.

[0075] The first reinforcing member 7 in this embodiment can improve the rigidity of the second collimator 3, better ensure the collimation effect of the front collimator 100, and the extension 42 abuts against the second collimator 3 to form a more complete shielding structure, which can further improve the radiation shielding protection performance.

[0076] Furthermore, the first collimator 2 is movably connected to the first-stage shielding section 11 along the height direction, and the first collimator 2 is detachably connected to the first-stage shielding section 11 to restrict the movement of the first collimator 2 along the height direction; the second collimator 3 is movably connected to the last-stage shielding section 12 along the height direction, and the second collimator 3 is detachably connected to the last-stage shielding section 12 to restrict the movement of the second collimator 3 along the height direction.

[0077] The first collimator 2 and the first-stage shielding section 11 can move relative to each other along the height direction through, for example, a slider and a groove. The first collimator 2 and the first-stage shielding section 11 can also be connected by detachable means such as bolts or pins to restrict the movement of the first collimator 2 along the height direction. Similarly, the second collimator 3 and the last-stage shielding section 12 can move relative to each other along the height direction through, for example, a slider and a groove. The second collimator 3 and the last-stage shielding section 12 can also be connected by detachable means such as bolts or pins to restrict the movement of the second collimator 3 along the height direction.

[0078] The height direction here is one of the second directions mentioned earlier, that is, the direction determined by a straight line perpendicular to the first direction. This straight line is basically parallel to the actual direction of gravity. In the embodiments of this application, combined with... Figures 1 to 5 As shown, the positive direction of the height direction is the opposite of the actual gravity direction, and the opposite direction of the height direction is the actual gravity direction.

[0079] Figure 6 It is based on Figure 2 A schematic diagram of the front alignment device from a perspective of the opposite direction along the first direction.

[0080] Furthermore, the front alignment device 100 also includes: a first connector, wherein the first alignment member 2 is provided with a first elongated hole extending in the height direction, and the first alignment member 2 is detachably connected to the first-stage shielding section 11 through the first connector passing through the first elongated hole, and the first connector is used to move in the height direction in the first elongated hole; and a second connector 8, wherein the second alignment member 3 is provided with a second elongated hole 32 extending in the height direction, and the second alignment member 3 is detachably connected to the last-stage shielding section 12 through the second connector 8 passing through the second elongated hole 32, and the second connector 8 is used to move in the height direction in the second elongated hole 32.

[0081] Combination Figure 1 , Figure 2 and Figure 6 As shown, the second connector 8 can be a fastener such as a bolt. Figure 6There are actually four second connecting pieces 8 in total. One of the second connecting pieces 8 is concealed, and the first reinforcing piece 7 nearby is also partially concealed to reveal the second elongated hole 32 on the second collimator 3. The second connecting piece 8 passes through the second elongated hole 32, thereby detachably connecting the second collimator 3 to the final shielding section 12. When the detachable connection between the second collimator 3 and the final shielding section 12 is at least partially disengaged (if the second connecting piece 8 is a bolt, then simply loosening the second connecting piece 8 without completely separating the second collimator 3 and the final shielding section 12 is sufficient to achieve at least partial disengagement), the second connecting piece 8 can move along the height direction in the second elongated hole 32, thereby allowing the second collimator 3 to move along the height direction, realizing the function of adjusting the height of the second collimation slot 31 of the second collimator 3. After adjustment, the second collimator 3 and the final shielding section 12 are detachably connected again through the second connecting piece 8, thus locking the position of the second collimator 3 after height adjustment.

[0082] Similarly, the first connector can be a bolt or other fastener. The first connector passes through the first elongated hole, thus detachably connecting the first collimator 2 to the primary shielding section 11. When the detachable connection between the first collimator 2 and the primary shielding section 11 is at least partially disengaged (if the first connector is a bolt, then simply loosening the first connector without completely separating the first collimator 2 and the primary shielding section 11 is sufficient to achieve at least partial disengagement), the first connector can move along the height direction within the first elongated hole, allowing the first collimator 2 to move along the height direction. This is the function of adjusting the height of the first collimation slot 21 of the first collimator 2. After adjustment, the first collimator 2 and the primary shielding section 11 are detachably connected again via the first connector, thus locking the position of the first collimator 2 after height adjustment (the first connector and the first elongated hole are not shown in the figure, but their structure is similar to that of the second connector 8 and the second elongated hole 32).

[0083] By using the first connector in this embodiment of the application to cooperate with the first elongated hole and the second connector 8 to cooperate with the second elongated hole 32, the detachable connection between the first collimator 2 and the first-stage shielding section 11 is at least partially disengaged, and the detachable connection between the second collimator 3 and the last-stage shielding section 12 is at least partially disengaged. When the first collimator 2 and the second collimator 3 are at least partially disengaged, the first collimator 2 and the second collimator 3 can move along the height direction to adjust the height of the first collimation seam 21 and the second collimation seam 31. After adjustment, the detachable connection is achieved through the first connector and the second connector 8, thereby locking the height of the first collimation seam 21 and the second collimation seam 31. This can better ensure that the first collimation seam 21 and the second collimation seam 31 are on the same plane and ensure the collimation effect.

[0084] Figure 7 This is a side view of a radiation source assembly according to some exemplary embodiments of this application.

[0085] Furthermore, the front alignment device 100 also includes: a first adjusting screw 91 for driving the first alignment member 2 to move along the height direction; and a second adjusting screw 92 for driving the second alignment member 3 to move along the height direction.

[0086] Combination Figure 6 and Figure 7 As shown, Figure 7 The X-ray source assembly 200 includes a pre-collimation device 100. The first adjusting screw 91 of the pre-collimation device 100 can be mounted on the first-stage shielding section 11 or on other structures fixed relative to the first-stage shielding section 11. The second adjusting screw 92 can be mounted on the final-stage shielding section 12, on the end cap 6, or on other structures fixed relative to the final-stage shielding section 12 and the end cap 6. By turning the first adjusting screw 91, it abuts against the first collimator 2, thereby causing the first collimator 2 to move up and down in the height direction when at least the detachable connection between the first collimator 2 and the first-stage shielding section 11 is partially disengaged. Similarly, by turning the second adjusting screw 92, it abuts against the second collimator 3, thereby causing the second collimator 3 to move up and down in the height direction when at least the detachable connection between the second collimator 3 and the final-stage shielding section 12 is partially disengaged. Multiple first adjusting screws 91 and second adjusting screws 92 can be provided according to the specific dimensions and requirements of the first collimator 2 and the second collimator 3. Here, the number of first adjusting screws 91 and second adjusting screws 92 is not specifically limited.

[0087] The first adjusting screw 91 and the second adjusting screw 92 of the present application embodiment can more accurately adjust the height position of the first collimator 2 and the second collimator 3, thereby helping to ensure that the first collimator 2 and the second collimator 3 are on the same horizontal plane.

[0088] A second aspect of this application also provides a radiation source assembly 200, comprising: a pre-collimation device 100; a radiation source 201 for emitting a radiation beam; the pre-collimation device 100 being located downstream of the radiation source 201 along the direction of radiation beam propagation, wherein a plurality of shielding sections 1 in the pre-collimation device 100 are capable of relative movement in the direction of radiation beam propagation to adjust the distance between the first collimation slit 21 and the second collimation slit 31 along the direction of radiation beam propagation, thereby adjusting the beam width of the radiation beam emitted from the pre-collimation device 100.

[0089] Combination Figure 7As shown, the X-ray source 201 can be an X-ray machine. The X-ray beam emitted by the machine enters the shielding cavity 101 of each shielding section 1 through the first collimation slit 21 of the first collimator 2 of the pre-collimation device 100, and finally exits from the second collimation slit 31 of the second collimator 3, resulting in a X-ray beam after passing through the pre-collimation device 100. The shielding sections 1 of the pre-collimation device 100 can move relative to each other in the X-ray beam propagation direction (referring to the propagation direction defined by the central axis of the X-ray beam; in this embodiment, the X-ray beam propagation direction is the first direction mentioned above), thereby adjusting the distance between the first collimation slit 21 and the second collimation slit 31 along the X-ray beam propagation direction, and thus adjusting the beam width of the X-ray beam emitted from the pre-collimation device 100. The process by which the X-ray source assembly 200 adjusts the beam width can be referred to the process of adjusting the beam width of the pre-collimation device 100 described above, and will not be repeated here.

[0090] The X-ray source assembly 200 of this application embodiment includes the aforementioned pre-collimation device 100. Through the sleeve connection between multiple shielding sections 1, the relative movement between each shielding section 1 along the first direction is realized, so that the first collimator 2 disposed on the first-stage shielding section 11 and the second collimator 3 disposed on the last-stage shielding section 12 move relative to each other along the first direction, thereby adjusting the distance between the first collimation slit 21 and the second collimation slit 31 in the first direction, thereby adjusting the beam width of the X-ray beam emitted from the second collimation slit 31. The adjustment process is more convenient and flexible, without the need to disassemble and assemble parts offline, and can better adapt to the need for frequent beam width adjustment, especially suitable for application in experimental research operations of X-ray diffraction.

[0091] Figure 8 This is a side view schematic diagram of a diffraction detection system according to some exemplary embodiments of this application.

[0092] Furthermore, the radiation source assembly 200 also includes: a first support 202, on which the first-stage shielding section 11 of the front alignment device 100 and the radiation source 201 are mounted; a second support 203, on which the final-stage shielding section 12 of the front alignment device 100 is mounted; and a linear guide rail 204, which is arranged along the direction of radiation beam propagation, on which the first support 202 and / or the second support 203 are movably mounted.

[0093] Combination Figure 8As shown, the diffraction detection system 300 of this application embodiment includes the aforementioned X-ray source assembly 200, which includes the aforementioned pre-collimation device 100. The first-stage shielding section 11 and the X-ray source 201 are both mounted on the first support 202, and the final-stage shielding section 12 is mounted on the second support 203. The first support 202 and / or the second support 203 are movably mounted on the linear guide rail 204, thereby allowing relative movement between the first support 202 and the second support 203 in the X-ray beam propagation direction, realizing relative movement between each shielding section 1, and thus adjusting the distance between the first collimation slit 21 and the second collimation slit 31 in the X-ray beam propagation direction. Figure 8 In the illustrated embodiment, the first support 202 is movably mounted on the linear guide rail 204, while the second support 203 is fixedly mounted, thereby achieving the guiding function for the relative movement between the first support 202 and the second support 203. It can be understood that as long as at least one of the first support 202 and the second support 203 is movably mounted on the linear guide rail 204, the guiding function for the relative movement between the first support 202 and the second support 203 can be achieved.

[0094] The linear guide 204 in this embodiment guides the first support 202 and / or the second support 203, making the relative movement between the first support 202 and the second support 203 along the direction of ray beam propagation more precise.

[0095] It is understandable that the radiation source 201 and the first support 202 are also stationary components relative to the first shielding section 11. The first adjusting screw 91 mentioned above can also be installed on the radiation source 201 or the first support 202. The second support 203 is also a stationary component relative to the last shielding section 12. The second adjusting screw 92 mentioned above can also be installed on the second support 203.

[0096] Furthermore, the X-ray source assembly 200 also includes: a drive device 205; a transmission structure 206, wherein the drive device 205 is connected to the transmission structure 206 to drive the first support 202 and / or the second support 203 to move on the linear guide rail 204.

[0097] Combination Figure 8 As shown, the drive device 205 can be a motor or other drive component, and the transmission structure 206 can be a lead screw or other transmission component. The drive device 205 and the transmission structure 206 can drive the relative movement between the first support 202 and the second support 203 in the direction of the beam propagation.

[0098] The driving device 205 and transmission structure 206 of this application embodiment can automatically drive the relative movement between the first support 202 and the second support 203, thereby driving the distance between the first collimation slit 21 and the second collimation slit 31 in the direction of beam propagation, realizing a more automated beam width adjustment process, and further improving the convenience and efficiency of adjustment.

[0099] Combination Figure 8 As shown, a third aspect of this application also provides a diffraction detection system 300, including: the above-mentioned X-ray source assembly 200; and a detector 301 for receiving X-rays emitted through the second collimation slit 31 and diffracted by the object 400 to be examined.

[0100] The X-ray beam emitted from the second collimation slit 31 is directed toward the object to be inspected 400 according to the set beam width. After being diffracted by the object to be inspected 400, it is received by the detector 301, thereby realizing the inspection and detection function of the object to be inspected 400. The detector 301 can be set with its specific structure and number as needed.

[0101] Combination Figure 8 As shown, the diffraction detection system 300 also includes a base 302, on which the linear guide rail 204, transmission structure 206, and detector 301 can all be mounted. One of the first support 202 and the second support 203, which is fixedly disposed, can be mounted on the base 302, while the other is mounted on the base 302 via the linear guide rail 204 to achieve relative movement. Furthermore, the object to be examined 400 can be placed in the area of ​​the base 302 between the second support 203 and the detector 301 for detection.

[0102] The diffraction detection system 300 of this application embodiment includes a radiation source assembly 200, which includes the aforementioned pre-collimation device 100. Through the sleeve connection between multiple shielding sections 1, the relative movement between each shielding section 1 along a first direction is realized, so that the first collimator 2 disposed on the first-stage shielding section 11 and the second collimator 3 disposed on the last-stage shielding section 12 move relative to each other along the first direction, thereby adjusting the distance between the first collimation slit 21 and the second collimation slit 31 in the first direction, and thus adjusting the beam width of the radiation beam emitted from the second collimation slit 31. The adjustment process is relatively convenient and flexible, and there is no need to disassemble and assemble parts offline. It can better adapt to the need for frequent beam width adjustment, and is especially suitable for application in experimental research operations of X-ray diffraction.

[0103] The embodiments of this application have been described above. However, these embodiments are merely illustrative and not intended to limit the scope of this application. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. Without departing from the scope of this application, those skilled in the art can make various substitutions and modifications, all of which should fall within the scope of this application.

Claims

1. A front alignment device, characterized in that, include: Multiple shielding sections are sequentially connected along a first direction. The multiple shielding sections include a first-level shielding section and a last-level shielding section. The first-level shielding section is the first shielding section along the first direction among the multiple shielding sections, and the last-level shielding section is the last shielding section along the first direction among the multiple shielding sections. A first collimator is located at the end of the first-stage shielding section that is away from the last-stage shielding section along a first direction; The second collimator is located at the end of the final-stage shielding section away from the first-stage shielding section along the first direction. Wherein, the first collimator includes a first collimation slit, the second collimator includes a second collimation slit, each of the shielding sections includes a shielding cavity, and the shielding cavity of each of the shielding sections is located between the first collimation slit and the second collimation slit; The plurality of shielding sections are capable of relative movement in the first direction to adjust the distance between the first collimation seam and the second collimation seam along the first direction.

2. The aiming device according to claim 1, characterized in that, Each of the shielding sections includes a cylindrical body and a shielding layer, the shielding layer being disposed on the inner wall surface of the cylindrical body, and the shielding layer at least partially surrounding the shielding cavity.

3. The aiming device according to claim 2, characterized in that, The two adjacent shielding sections include a first shielding section near the first collimator and a second shielding section near the second collimator. The outer wall surface of the cylinder of the first shielding section and the inner wall surface of the shielding layer of the second shielding section are both gradually widened along the first direction to restrict the relative movement of the first shielding section and the second shielding section along the first direction.

4. The aiming device according to claim 3, characterized in that, The outer wall surface of the cylinder of the first shielding section is at least partially a non-rotational surface, and the inner wall surface of the shielding layer of the second shielding section is at least partially a non-rotational surface, so as to restrict the relative rotational movement of the first shielding section and the second shielding section about the first direction.

5. The alignment device according to claim 3, characterized in that, The front alignment device further includes a shielding ring; in the adjacent first shielding section and second shielding section, at least one of the shielding rings is disposed at the end of the first shielding section near the second alignment member, the shielding layer of the second shielding section surrounds the shielding ring, and the shielding ring includes a ring channel that connects the shielding cavity of the first shielding section and the shielding cavity of the second shielding section.

6. The alignment device according to claim 5, characterized in that, In the adjacent first shielding section and second shielding section, a first gap is formed between the outer wall surface of the shielding ring disposed on the first shielding section and the inner wall surface of the shielding layer of the second shielding section. The first gap has a first width in a second direction perpendicular to the first direction, and the shielding ring has a first thickness along the first direction. The ratio of the first width to the first thickness is less than a first proportional threshold.

7. The alignment device according to claim 5, characterized in that, The alignment device further includes: An end cap is detachably disposed at one end of the final shielding section near the second collimator. The end cap has a first through hole. At least one shielding ring is disposed between the final shielding section and the end cap and abuts against the shielding layer of the final shielding section. The shielding ring disposed between the final shielding section and the end cap has an extension portion, which is disposed on the inner wall surface of the first through hole.

8. The alignment device according to claim 7, characterized in that, The alignment device further includes: The first reinforcing member, the second collimating member is disposed between the first reinforcing member and the end cap, and the end of the extension facing the second collimating member abuts against the second collimating member.

9. The alignment device according to claim 1, characterized in that, The first collimator is movably connected to the first-stage shielding section along the height direction, and the first collimator is detachably connected to the first-stage shielding section to restrict the movement of the first collimator along the height direction; the second collimator is movably connected to the last-stage shielding section along the height direction, and the second collimator is detachably connected to the last-stage shielding section to restrict the movement of the second collimator along the height direction.

10. The alignment device according to claim 9, characterized in that, The alignment device further includes: The first connector has a first elongated hole extending along the height direction. The first connector is detachably connected to the first-stage shielding section through the first connector passing through the first elongated hole. The first connector is used to move along the height direction in the first elongated hole. The second connector has a second elongated hole extending along the height direction. The second connector is detachably connected to the final shield section through the second connector passing through the second elongated hole. The second connector is used to move along the height direction in the second elongated hole.

11. The alignment device according to claim 9, characterized in that, The alignment device further includes: The first adjusting screw is used to drive the first collimator to move along the height direction; The second adjusting screw is used to drive the second collimator to move along the height direction.

12. A radiation source assembly, characterized in that, include: The pre-aiming device as described in any one of claims 1 to 11; A radiation source, wherein the radiation source is used to emit a radiation beam; The pre-collimation device is located downstream of the X-ray source along the X-ray beam propagation direction. Multiple shielding sections in the pre-collimation device can move relative to each other along the X-ray beam propagation direction to adjust the distance between the first collimation slit and the second collimation slit along the X-ray beam propagation direction, thereby adjusting the beam width of the X-ray beam emitted from the pre-collimation device.

13. The radiation source assembly according to claim 12, characterized in that, The radiation source assembly also includes: The first support is on which the first-stage shielding section of the front alignment device and the radiation source are mounted; The second support is on which the final stage shielding section of the front alignment device is installed; A linear guide rail is provided along the direction of the ray beam propagation, and the first support and / or the second support are movably mounted on the linear guide rail.

14. The radiation source assembly according to claim 13, characterized in that, The radiation source assembly also includes: Drive unit; A transmission structure, wherein the driving device is connected to the transmission structure to drive the first support and / or the second support to move on the linear guide rail.

15. A diffraction detection system, characterized in that, include: The radiation source assembly as described in any one of claims 12 to 14; A detector is used to receive rays emitted through the second collimating slit and diffracted by the object under investigation.

Images