Assembly for verifying uniformity of planar radioactive source

Abstract

The utility model provides an assembly for verifying uniformity of a planar radioactive source, and relates to the technical field of radioactive source detection, the assembly comprises a sample carrying table and a cover body, the planar radioactive source is placed on the sample carrying table, and the sample carrying table is provided with a radiation opening; the cover body is movably connected with the sample carrying table and seals the radiation opening, and the cover body rotates relative to the sample carrying table according to a set angle by taking the central axis of the radiation opening as an axis; a measuring hole is formed in the cover body in a penetrating mode, the measuring hole extends to the periphery of the radiation opening from the central axis in the radial direction, the opening shape of the measuring hole is 1 / n of the shape of the radiation opening, n is an integer larger than 1, and n is equal to the ratio of 360 degrees to the set angle. The whole assembly only comprises the sample carrying table and the cover body which are movably connected, the structure is simple, the cost is low, the economical efficiency is high, the uniformity of the planar radioactive source can be verified, operation is easy and convenient, and the inspection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of radioactive detection, in particular to a component for verifying the uniformity of a planar radioactive source. BACKGROUND

[0002] In nuclear physics experiments and radiation technology applications, the uniformity of an alpha planar source is not only related to the accuracy of experimental results, but also plays a decisive role in the reliability of scientific research. The uniformity of an alpha planar source means that the energy and quantity distribution of alpha particles released by each point on the source surface are consistent. This consistency is crucial for accurately controlling experimental conditions, reducing errors, and improving the repeatability of experiments.

[0003] From the perspective of experimental design, the uniformity of an alpha planar source ensures that the radiation intensity or energy distribution at different positions remains consistent under the same conditions. This is crucial for quantitative analysis and comparison of experimental results, and can eliminate errors caused by source non-uniformity. In material irradiation experiments, the uniformity of an alpha planar source is of great significance for simulating irradiation conditions in real environments. If the alpha planar source is not uniform, it may cause the irradiation dose of local areas of the material to be too high or too low, thereby affecting the performance evaluation and prediction of the material. In addition, in radiation measurement and radiation dosimetry, the uniformity of an alpha planar source is the basis for calibrating and verifying the accuracy of measurement equipment. Only when the source itself has uniform radiation characteristics can the accuracy and repeatability of measurement results be ensured.

[0004] Therefore, the uniformity of an alpha planar source can ensure the accuracy and reliability of experimental data, providing a solid foundation for scientific research. Therefore, in related experimental research, sufficient attention should be paid to and measures should be taken to ensure the uniformity of an alpha planar source. The devices or methods for verifying the uniformity of an alpha planar source disclosed in the related art have overly complex verification instrument structures, high costs, and poor economic efficiency. CONTENT OF THE INVENTION

[0005] To solve the above technical problems, the present application provides a component for verifying the uniformity of a planar radioactive source, which solves the problems of complex instrument structure, high cost, and poor economic efficiency in the prior art. The component for verifying the uniformity of a planar radioactive source provided by the present application is designed for small alpha planar sources, has a simple structure, low cost, and is reusable, has good economic efficiency, and is simple and convenient to operate, thereby improving the inspection efficiency.

[0006] The application provides a component for verifying the uniformity of a plane radioactive source, which comprises a sample loading table and a cover, the sample loading table is provided with a radioactive opening for the outward radiation of the radioactive source, and the cover is movably connected to the sample loading table and covers the radioactive opening, the cover rotates relative to the sample loading table at a set angle about the central axis of the radioactive opening, the cover is provided with a measuring hole penetrating the position corresponding to the radioactive opening, the measuring hole extends radially from the central axis to the circumference of the radioactive opening, and the opening shape of the measuring hole is 1 / n of the shape of the radioactive opening, n is an integer greater than 1, and n is equal to the ratio of 360° to the set angle.

[0007] In some embodiments, one end of the sample loading table is provided with a receiving groove concave along the central axis, the opening of the receiving groove on the end surface of the sample loading table forms the radioactive opening, and the radioactive source is arranged in the receiving groove.

[0008] In some embodiments, the inner wall profile of the cover matches the outer wall profile of the end of the sample loading table provided with the receiving groove, the shape of the radioactive opening comprises a circle or a regular polygon or a central-symmetrical polygon not including a regular polygon, when the radioactive opening is circular, the opening shape of the measuring hole is a sector, when the radioactive opening is a regular polygon, the opening shape of the measuring hole is an isosceles triangle, and when the radioactive opening is a central-symmetrical polygon not including a regular polygon, the opening shape of the measuring hole is the shape formed by one of the constituent units of the central-symmetrical polygon and the line connecting the center.

[0009] In some embodiments, when the shape of the radioactive opening is a circle, the center of the sector-shaped measuring hole is located on the central axis, the radius of the measuring hole is equal to the radius of the radioactive opening, the central angle of the measuring hole is equal to the set angle, and the arc length of the measuring hole is equal to 1 / n of the circumference of the radioactive opening.

[0010] In some embodiments, when the shape of the radioactive opening is a regular polygon, the regular polygon has n equal sides A, when the measuring hole is an isosceles triangle, the vertex angle of the measuring hole is located on the central axis, the base length of the measuring hole is equal to the length of any side A of the radioactive opening, the base of the measuring hole is aligned with any side A of the radioactive opening, the base length of the measuring hole is equal to the radius of the circumscribed circle of the radioactive opening, the vertex angle of the measuring hole is equal to the set angle, and the length of the base of the measuring hole is equal to the length of any side A of the radioactive opening.

[0011] In some embodiments, the outer wall of the end of the sample loading platform provided with the accommodating groove is a polygonal structure, including n first wall surfaces of the same structure, which are uniformly arranged around the central axis and axially extended; the inner wall of the cover includes n second wall surfaces of the same structure, which are uniformly arranged around the central axis and axially extended, and the second wall surfaces are one-to-one matched with the first wall surfaces when the cover is buckled on the sample loading platform after being rotated at the set angle.

[0012] In some embodiments, when the radiation opening is circular, the arc of the arc-shaped measurement hole is opposite to one of the second wall surfaces; when the radiation opening is a regular polygon with n equal sides A, the sides A are respectively parallel to the corresponding first wall surfaces; the base of the isosceles triangle-shaped measurement hole is parallel to one of the second wall surfaces.

[0013] In some embodiments, the outer wall of the cover is a polygonal structure, including n third wall surfaces of the same structure, which are uniformly arranged around the central axis and axially extended, and the third wall surfaces are respectively parallel to the corresponding second wall surfaces.

[0014] In some embodiments, the outer wall of the end of the sample loading platform provided with the accommodating groove is a cylindrical structure, and the cover is rotationally connected to the sample loading platform, and is rotated relative to the sample loading platform at the set angle under the limitation of the positioning structure.

[0015] In some embodiments, the positioning structure includes n positioning grooves and at least one elastic positioning member arranged between the sample loading platform and the cover, the n positioning grooves are uniformly arranged around the central axis, and the elastic positioning member is respectively elastically clamped in the corresponding positioning groove when the cover is rotated relative to the sample loading platform to the set angle.

[0016] The verification assembly for uniformity of a planar radioactive source provided by the present application is an adaptive design for small-sized alpha planar source uniformity detection. The assembly as a whole only includes an activity-connected sample loading platform and a cover, which is simple in structure, low in cost and high in economy. The planar radioactive source is placed on the sample loading platform, so that the radioactive source can radiate outward through the radiation opening provided on the sample loading platform. The cover is activity-connected to the sample loading platform and closes the radiation opening. The cover is provided with a measurement hole penetrating the position corresponding to the radiation opening. The radioactive material of the planar radioactive source can only radiate outward through the measurement hole, so as to detect the planar radioactive source in the region of the radiation opening currently corresponding to the measurement hole by an alpha spectrometer. The cover can be rotated relative to the sample loading platform at a set angle in the circumferential direction with the central axis of the radiation opening as the axis, so that the detection personnel can adjust the position of the measurement hole relative to the radiation opening by rotating the cover at a set angle.

[0017] Because the measuring hole extends from the central axis of the radiation opening to the periphery of the radiation opening, and the shape of the measuring hole is 1 / n of the shape of the radiation opening, where n is an integer greater than 1 and equal to the ratio of 360° to the set angle, the measuring hole returns to its initial position after the cover rotates clockwise or counterclockwise around the central axis n times relative to the sample stage. Furthermore, the path swept by the measuring hole around the central axis can completely cover the radiation opening without any overlap. This enables the individual detection of n equally divided regions of the planar radiation source corresponding to the radiation opening. By comparing and analyzing the detection data of each group, the uniformity of the planar radiation source can be verified. The verification operation is simple and convenient, improving the inspection efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0019] Figure 1 This is an overall front view of Embodiment 1 of this application;

[0020] Figure 2 This is an exploded view of the overall structure of Embodiment 1 of this application. Figure 1 ;

[0021] Figure 3 This is an exploded view of the overall structure of Embodiment 1 of this application. Figure 2 ;

[0022] Figure 4 This is a partial perspective view of the overall top view of Embodiment 1 of this application;

[0023] Figure 5 This is an exploded view of the overall structure of Embodiment 2 of this application;

[0024] Figure 6 This is a partial perspective view of the overall top view of Embodiment 2 of this application;

[0025] Figure 7 This is an exploded view of the overall structure of Embodiment 3 of this application;

[0026] Figure 8 This is an exploded view of the overall structure of Embodiment 4 of this application;

[0027] Figure 9 This is a schematic cross-sectional view of the overall structure of Embodiment 4 of this application. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0029] Please see Figure 2 , Figure 5 , Figure 7 and Figure 8 In some embodiments of this application, a component for verifying the uniformity of a planar radioactive source is provided. This component includes a sample stage 100 and a cover 200. A planar radioactive source (not shown in the figure) is placed on the sample stage 100; hereinafter, the radioactive source is described using an alpha source as an example. The sample stage 100 has a radiation opening 102 for alpha particles to radiate outward from the alpha source. The cover 200 is movably connected to the sample stage 100 and closes the radiation opening 102. The cover 200 rotates relative to the sample stage 100 at a set angle about the central axis 10 of the radiation opening 102. This rotation of the cover 200 relative to the sample stage 100 at the set angle can be performed when the two are connected or separated; this application does not limit this.

[0030] The cover 200 is provided with a measuring hole 201 through the radial opening 102. The measuring hole 201 extends radially from the central axis 10 to the periphery of the radial opening 102. The shape of the measuring hole 201 is 1 / n of the shape of the radial opening 102, where n is an integer greater than 1 and n is equal to the ratio of 360° to the set angle.

[0031] In this application, n is preferably a common divisor of 360 other than 1, which facilitates the design and manufacturing of the opening size of the measuring hole 201.

[0032] For example, when n is 5, the shape of the measuring hole 201 is 1 / 5 of the shape of the radial opening 102, which is equivalent to one of the five equal parts of the radial opening 102 centered on the central axis 10. The set angle is 1 / 5 of 360°, or 72°. Thus, the cover 200 rotates relative to the sample stage 100 about the central axis 10 at a set angle of 72°. After the cover 200 rotates clockwise or counterclockwise 5 times, the measuring hole 201 returns to its initial position. The path swept by the measuring hole 201 about the central axis 10 completely covers the radial opening 102 without any overlap, allowing for individual detection of the five equally divided regions of the planar radioactive source corresponding to the radial opening 102.

[0033] Similarly, when n is 12, the shape of the measuring hole 201 is 1 / 12 of the shape of the radial opening 102, which is equivalent to one of the twelve equal parts of the radial opening 102 centered on the central axis 10. The set angle is 1 / 12 of 360°, i.e., 30°. Thus, the cover 200 rotates relative to the sample stage 100 about the central axis 10 at a set angle of 30°. After the cover 200 rotates clockwise or counterclockwise 12 times, the measuring hole 201 can return to its initial position. The path swept by the measuring hole 201 about the central axis 10 can completely cover the radial opening 102 without any overlap, allowing for individual detection of the twelve equally divided regions of the planar radioactive source corresponding to the radial opening 102.

[0034] Similarly, when n is 60, the shape of the measuring hole 201 is 1 / 60th of the shape of the radial opening 102, which is equivalent to one of the twelve equal parts of the radial opening 102 centered on the central axis 10. The set angle is 1 / 60th of 360°, i.e., 6°. Thus, the cover 200 rotates relative to the sample stage 100 about the central axis 10 at a set angle of 6°. After the cover 200 rotates clockwise or counterclockwise 60 times, the measuring hole 201 returns to its initial position. The path swept by the measuring hole 201 about the central axis 10 can completely cover the radial opening 102 without any overlap, enabling individual detection of the sixty equally divided regions of the planar radioactive source corresponding to the radial opening 102.

[0035] Understandably, the larger the value of n, the smaller the opening size of the measuring hole 201, the smaller the area that allows alpha particles to escape, and the higher the detection accuracy. However, this also means that more tests need to be performed on the entire area of ​​the planar radioactive source. Conversely, the smaller the value of n, the larger the opening size of the measuring hole 201, the larger the area that allows alpha particles to escape, and the lower the detection accuracy. However, this also means that fewer tests need to be performed on the entire area of ​​the planar radioactive source. Therefore, in actual manufacturing, the value of n and the size of the measuring hole 201 can be selected according to the actual area of ​​the planar radioactive source and the actual measurement requirements.

[0036] The assembly for verifying the uniformity of a planar radioactive source provided in this application is an adaptive design for detecting the uniformity of small alpha planar sources. The assembly consists only of a movable sample stage 100 and a cover 200, which are simple in structure, low in cost, and highly economical. A planar radioactive source is placed on the sample stage 100, allowing the alpha source to radiate alpha particles outward through a radiation opening 102 on the sample stage 100. The cover 200 is movably connected to the sample stage 100 and closes the radiation opening 102. A measurement hole 201 is provided through the cover 200 at the position corresponding to the radiation opening 102. The radioactive material from the planar radioactive source can only radiate outward through this measurement hole 201, allowing an alpha spectrometer to detect alpha particle emission from the alpha source within the radiation opening 102 region currently corresponding to the measurement hole 201. The cover 200 can rotate around the central axis 10 of the radial opening 102 at a set angle relative to the sample stage 100 in the circumferential direction, so that the inspector can adjust the position of the measuring hole 201 relative to the radial opening 102 by rotating the cover 200 at a fixed angle.

[0037] Since the measuring hole 201 extends from the central axis 10 of the radiation opening 102 to the periphery of the radiation opening 102, and the opening shape of the measuring hole 201 is 1 / n of the shape of the radiation opening 102, where n is an integer greater than 1 and equal to the ratio of 360° to the set angle, after the cover 200 rotates clockwise or counterclockwise around the central axis 100 n times relative to the sample stage 100, the measuring hole 201 returns to its initial position. Moreover, the path swept by the measuring hole 201 around the central axis 10 can completely cover the radiation opening 102 without any overlap. This enables the individual detection of n equally divided regions of the planar radiation source corresponding to the radiation opening 102. By comparing and analyzing the detection data of each group, the uniformity of the planar radiation source can be verified. The detection accuracy is high, the verification operation is simple and convenient, and the inspection efficiency is improved.

[0038] In the following specific embodiments, the value of n is 12 for each example, and the set angle is 30° for each example. In other specific embodiments of this application, the value of n can also be other specific integers between 1 and 360, and the set angle is derived accordingly based on the specific integer value, as long as it can meet the actual detection requirements.

[0039] Please see Figures 1 to 4This is Embodiment 1 of the components of this application. In this embodiment, the upper end of the sample stage 100 is provided with a receiving groove 101 formed concavely along the central axis 10. The opening of the receiving groove 101 on the upper surface of the sample stage 100 forms the radiation opening 102, and the α source is disposed in the receiving groove 101. The concave depth of the receiving groove 101 is consistent with the thickness of the α source sample, and the radial dimension of the receiving groove 101 is consistent with the radial dimension of the α source sample, to ensure that the α can be uniformly distributed in the receiving groove 101 to form a planar radiation source.

[0040] After the cover 200 is connected to the sample stage 100, the alpha source in the corresponding area of ​​the radiation opening 102 facing the measurement port can radiate alpha particles outward through the measurement port, so that the alpha source in the corresponding area can be individually detected by the alpha spectrometer. However, the alpha particles radiated by the alpha source in the other areas corresponding to the radiation opening 102 are blocked by the non-measurement port top surface area of ​​the cover 200 and cannot radiate alpha particles outward from the component.

[0041] The measuring hole 201 rotates one revolution around the central axis 10 in a fixed direction (clockwise or counterclockwise) and then returns to its original position. This effectively divides the planar source corresponding to the radiation opening 102 into twelve equal regions. The corresponding region directly opposite the measuring hole 201 is the detection area, and the remaining regions arranged sequentially along the fixed direction are the areas to be detected. After a single measurement is completed, the position of the cover 200 is adjusted so that it rotates 30° relative to the sample stage 100 about the central axis 10 in a fixed direction. This rotates the measuring hole 201 to the next equal region corresponding to the planar source to facilitate continued measurement until the measuring hole 201 returns to its initial position, completing the detection of all twelve equal regions of the planar radiation source.

[0042] The component provided in this application has an inner wall contour that matches the outer wall contour of the upper end of the sample stage 100 where the receiving groove 101 is located, so that the cover 200 can be sealed and fastened to the upper end of the sample stage 100 through its inner wall, and the receiving groove 101 is closed through the top surface portion of the non-measuring hole 201 of the cover 200. After the cover 200 is fastened to the sample stage 100, it can rotate relative to the sample stage 100 at a set angle without axial movement, or it can rotate relative to the sample stage 100 at a set angle with axial movement; this application does not limit this.

[0043] Understandably, the cover 200 can completely engage with the sample platform 100, meaning the overall height of the sample platform 100 along its central axis 10 matches the height of the inner wall of the cover 200 along its central axis 10. Once the cover 200 is engaged, the sample platform 100 can be completely contained within it. Alternatively, the cover 200 can partially engage with the sample platform 100, meaning the overall height of the sample platform 100 along its central axis 10 is greater than the height of the inner wall of the cover 200 along its central axis 10, such as... Figure 1 As shown, after the cover 200 of Embodiment 1 is engaged, at least part of the lower end of the sample stage 100, which is away from the receiving groove 101, will be exposed outside the cover 200. In some other embodiments, after the cover is engaged, the sample stage 100 can also be completely contained within the cover 200. In actual manufacturing, the axial height of the sample stage 100 relative to the cover 200 can be designed according to actual usage needs, and this application does not limit this.

[0044] The components provided in this application have various shapes for the radial opening 102 on the sample stage 100. It can be circular, a regular polygon, or a centrally symmetric polygon excluding regular polygons. When the radial opening 102 is circular, the opening shape of the measuring hole 201 is fan-shaped. When the radial opening 102 is a regular polygon, the opening shape of the measuring hole 201 is an isosceles triangle. When the radial opening 102 is a centrally symmetric polygon excluding regular polygons, the opening shape of the measuring hole 201 is the shape formed by connecting one of the constituent units of the centrally symmetric polygon to its center.

[0045] Please see Figure 2 and Figure 4 In Embodiment 1, the radial opening 102 is circular in shape, and the center of the fan-shaped measuring hole 201 is located on the central axis 10, i.e., the center of the top surface of the cover 200. The radius of the measuring hole 201 is equal to the radius of the radial opening 102, the central angle of the measuring hole 201 is equal to the set angle, and the arc length of the measuring hole 201 is equal to 1 / n of the circumference of the radial opening 102. After the cover 200 is fastened onto the sample stage 100, the arc of the measuring hole 201 is located on the periphery of the radial opening 102. In this embodiment, n is taken as 12, and the set angle is 30°, i.e., the arc length of the fan-shaped measuring hole 201 is 1 / 12 of the circumference of the radial opening 102, and the central angle of the fan-shaped measuring hole 201 is 30°. The sector shape of the measuring hole 201 is actually the shape formed by connecting one of the constituent units of the radial opening 102 (i.e., 1 / 12 of the arc of the periphery of the radial opening 102) with its center.

[0046] Thus, after the cover 200 is fastened onto the sample stage 100, the fan-shaped measuring hole 201 is equivalent to one of the twelve equal parts of the radiation opening 102 centered on the central axis 10. This ensures that after the cover 200 rotates 12 times clockwise or counterclockwise around the central axis 10 at a set angle of 30°, the measuring hole 201 can return to its initial position. Furthermore, the path swept by the measuring hole 201 around the central axis 10 can completely cover the radiation opening 102 without any overlap, enabling individual detection of the twelve equally divided regions of the planar radiation source corresponding to the radiation opening 102.

[0047] Please see Figures 5 to 6 This is Embodiment 2 of the component of this application. The difference between Embodiment 1 and Embodiment 2 lies in the shape of the radial opening 102. The remaining structurally identical parts of Embodiment 1 will not be described again. In Embodiment 2, the radial opening 102 is a regular polygon with n equal sides A1021. The vertex angle of the isosceles triangle measuring hole 201 is located on the central axis 10. The length of the side of the measuring hole 201 is equal to the radius of the circumcircle of the radial opening 102. The vertex angle of the measuring hole 201 is equal to the set angle. The length of the base of the measuring hole 201 is equal to the length of any one side A1021 of the radial opening 102, and the base of the measuring hole 201 is aligned with any one side A1021 of the radial opening 102. In this embodiment, n is taken as 12, and the set angle is 30°, meaning the shape of the radial opening 102 is a regular dodecagon, and the vertex angle of the isosceles triangle measuring hole 201 is 30°. The isosceles triangle of the measuring hole 201 is actually the shape formed by connecting one of the constituent units (i.e., side A1021) of the regular dodecagon of the radial opening 102 with its center.

[0048] Thus, after the cover 200 is fastened onto the sample stage 100, the isosceles triangular measuring hole 201 is equivalent to one of the twelve equal parts of the radiation opening 102 centered on the central axis 10. This ensures that after the cover 200 rotates 12 times clockwise or counterclockwise around the central axis 10 at a set angle of 30°, the measuring hole 201 can return to its initial position. Furthermore, the path swept by the measuring hole 201 around the central axis 10 can completely cover the radiation opening 102 without any overlap, enabling individual detection of the twelve equally divided regions of the planar radiation source corresponding to the radiation opening 102.

[0049] In some other embodiments, the shape of the radial opening can also be set as a centrally symmetric polygon excluding regular polygons. The shape of the measuring hole is 1 / n of the centrally symmetric polygon, and the measuring hole is a polygon formed by connecting one of the constituent units of the centrally symmetric polygon to its center. The angle formed between the two radial lines of the central axis where the measuring holes of the polygon intersect is the set angle. In this embodiment, the value of n is 12, and the set angle is 30°.

[0050] Thus, after the cover is fastened onto the sample stage, the polygonal measuring hole is equivalent to one of the twelve equal parts of the radiation opening with the central axis as the center. This ensures that after the cover is rotated 12 times clockwise or counterclockwise at a set angle of 30° with the central axis of the radiation opening as the axis, the measuring hole can return to its initial position. Furthermore, the path swept by the measuring hole when rotating with the central axis as the axis can completely cover the radiation opening without any overlap, enabling individual detection of the twelve equally divided regions of the planar radiation source corresponding to the radiation opening.

[0051] As a preferred option, the component provided in this application has a circular shape for its radiation opening 102. This facilitates the manufacturing of the sample stage 100, provides a relatively larger planar source area, and makes measurement and calculation easier.

[0052] The components provided in this application have various forms of outer wall contours at one end of the sample stage 100, which has a receiving groove 101.

[0053] Please see Figures 1 to 4 In Embodiment 1, the sample stage 100 has an upper outer wall profile of the receiving groove 101 with a polygonal prism structure, and the inner wall profile of the cover 200 is a matching square groove. When the cover 200 is fastened to the sample stage 100, it cannot rotate relative to the sample stage 100. After a single test, the cover 200 needs to be moved axially to detach from the sample stage 100, rotated at a set angle, and then fastened back onto the sample stage 100. That is, the polygonal prism structure of the upper end of the sample stage 100 and the square groove of the cover 200 cooperate to position the cover 200 and restrict the cover 200 to engage with the sample stage 100 at a set angle. Although this increases the number of steps for assembling and disassembling the cover 200, it does not require additional positioning structures, which can significantly reduce the complexity of the component structure, further reduce component costs, and improve economy.

[0054] Please see Figures 2 to 3The upper outer wall of the sample stage 100 includes n identical first wall surfaces 103, which are evenly arranged and extend axially around the central axis 10. Correspondingly, the inner wall of the cover 200 includes n identical second wall surfaces 202, which are evenly arranged and extend axially around the central axis 10. When the cover 200 rotates at a set angle and engages with the sample stage 100, the second wall surfaces 202 and the first wall surfaces 103 are fitted one-to-one. In this embodiment, n is taken as 12, and the set angle is 30°. That is, the upper outer wall of the sample stage 100 has 12 first wall surfaces 103, and the inner wall of the cover 200 has 12 second wall surfaces 202. The cover 200 rotates at a 30° angle around the central axis 10 and engages with the sample stage 100.

[0055] The first wall surface 103 on the outer wall of the sample stage 100 and the second wall surface 202 on the inner wall of the cover 200 cooperate to position the cover 200 and restrict the cover 200 to combine with the sample stage 100 at a set angle.

[0056] Since the first wall surface 103 and the second wall surface 202 are both evenly arranged around the central axis 10, and their number and distribution match the twelve equally divided regions of the planar source corresponding to the radiation opening 102, the cover 200 can rotate around the central axis 10 at any integer multiple of the set angle and engage with the sample stage 100. This ensures that after the cover 200 rotates continuously 12 times in a fixed direction at the set angle, the measuring hole 201 can return to its initial position. Furthermore, the path swept by the measuring hole 201 around the central axis 10 can completely cover the radiation opening 102 without any overlap, allowing for individual detection of the twelve equally divided regions of the planar radiation source. In addition, this also ensures that the cover 200 can engage with the sample stage 100 after rotating arbitrarily a number of times at the set angle, whether odd or even, guaranteeing the degree of freedom of the cover 200 to rotate relative to the sample stage 100 at the set angle.

[0057] Furthermore, the components provided in this application, including the polygonal prism structure on the upper outer wall of the sample stage 100, also have various forms.

[0058] Please see Figures 1 to 3 In Embodiment 1, a transition surface A104 connects two adjacent first wall surfaces 103 on the upper outer wall of the platform. There are a total of 12 transition surfaces A104, all with identical structures, and the 12 transition surfaces A104 are evenly arranged around the central axis 10. The length of the transition surface A104 in the axial direction of the platform is the same as the length of the first wall surface, and the width of the transition surface A104 in the circumferential direction of the platform is preferably smaller than the width of the first wall surface.

[0059] Correspondingly, a transition surface B203 connects two adjacent second wall surfaces 202 on the inner wall of the cover 200. There are a total of 12 transition surfaces B203, all with identical structures, evenly arranged around the central axis 10. The length of the transition surface A104 in the axial direction of the sample stage is the same as the length of the first wall surface, and the width of the transition surface A104 in the circumferential direction of the sample stage is preferably less than the width of the first wall surface. The cover 200 can rotate about the central axis 10 at a set angle of 30° or any integer multiple of that set angle, and still remain engaged with the sample stage 100. When the cover 200 is engaged with the sample stage 100, the second wall surface 202 and the first wall surface 103 are in one-to-one contact, and the transition surface B203 and the transition surface A104 are in one-to-one contact.

[0060] The two adjacent first walls 103 of the polygonal prism are connected by a transition surface A104, which can reduce the sharpness of the ridge structure of the outer wall of the stage and improve the smoothness, making it easier for the cover 200 to fasten to the stage.

[0061] Of course, in some other embodiments, no chamfer or transition structure may be provided between the two adjacent first walls of the outer wall of the sample stage 100.

[0062] Please see Figure 7 This is Embodiment 3 of the components of this application. The difference between Embodiment 3 and Embodiment 1 lies in the different polygonal prism structure on the outer wall of the sample stage and the square groove structure on the inner wall of the cover. The remaining structurally identical parts to Embodiment 1 will not be described further. In Embodiment 3, the 12 first wall surfaces 103 at the upper end of the sample stage 100 directly enclose to form a dodecagonal prism structure, meaning there are no chamfers or transition structures between adjacent first wall surfaces 103. Correspondingly, the 12 second wall surfaces 202 on the inner wall of the cover 200 also directly enclose to form a square groove that matches the dodecagonal prism structure. There are also no chamfers or transition structures between adjacent second wall surfaces 202, allowing the cover 200 to rotate about the central axis 10 at a set angle of 30° or any integer multiple of the set angle, and still remain engaged with the sample stage 100. When the cover 200 is engaged with the sample stage 100, the second wall surfaces 202 and the first wall surfaces 103 are in one-to-one contact. Compared to the components in Example 1, the outer wall of the sample stage 100 and the inner wall of the cover 200 do not have transition surfaces, which can reduce the chamfering and cutting steps during component manufacturing and reduce manufacturing costs.

[0063] Understandably, the outer wall of the sample stage 100 can be entirely constructed as a polygonal prism, or only the portion of the outer wall of the sample stage 100 connecting to the cover 200 can be constructed as a polygonal prism; this application does not impose any limitations on this. In actual manufacturing, adjustments can be made according to the actual structure and dimensions of the sample cell of the α-energy dispersive spectrometer to ensure that the sample stage 100 is stably placed in the sample cell.

[0064] Please see Figures 2 to 4 In Embodiment 1, for a component whose upper outer wall of the sample stage 100 is a polygonal prism structure, when the radial opening 102 is circular, the opening shape of the measuring hole 201 is fan-shaped. Preferably, the arc of the fan-shaped measuring hole 201 is positioned inside one of the second wall surfaces 202 of the cover 200. Thus, after the cover 200 is fastened onto the sample stage 100, the arc of the measuring hole 201 is located on the periphery of the radial opening 102, and the measuring hole 201 can be aligned with the corresponding first wall surface 103 of the outer wall of the sample stage 100. This facilitates determining the rotational position of the fan-shaped measuring hole 201 relative to the sample stage 100 during the testing process by marking the first wall surface 103.

[0065] Furthermore, the outer wall of the cover 200 can also be configured as a polygonal prism structure, including n identical third wall surfaces 204, which are uniformly arranged and extend axially around the central axis 10. In this embodiment, n is taken as 12, and the angle is set to 30°, that is, the number of third wall surfaces 204 on the outer wall of the cover 200 is the same as the number of first wall surfaces 103 on the outer wall of the sample stage, and the third wall surfaces 204 on the outer wall of the cover 200 are parallel to the corresponding second wall surfaces 202 on the inner wall of the cover 200. After the cover 200 is fastened onto the sample stage 100, the fan-shaped measuring hole 201 can be aligned with the corresponding third wall surface 204 on the outer wall of the cover 200 and the corresponding first wall surface on the outer wall of the sample stage 100 simultaneously. During the testing process, by marking the corresponding third wall 204 and first wall 103, the rotational position of the measuring hole 201 relative to the sample stage 100 and the equally divided areas of the radiation opening 102 can be determined. This facilitates the testing operation and also avoids repeated testing or missed testing caused by the measuring hole 201 repeatedly corresponding to a certain equally divided area of ​​the radiation opening 102 or skipping a certain equally divided area of ​​the radiation opening 102, which helps to improve the accuracy of the testing.

[0066] In actual testing, the alpha source is placed in the receiving slot 101 of the sample stage 100, ensuring that the radioactive surface of the source faces the top surface of the cover 200. The cover 200 is then fastened onto the sample stage 100, and the corresponding area to be tested in the radioactive opening 102 is sealed through the non-measuring hole area on the top surface of the cover 200. The relative positions of the third wall surface 204 of the outer wall of the cover 200 and the first wall surface 103 of the outer wall of the sample stage 100 are marked. The entire assembly is then placed in the sample tray of the alpha spectrometer, and the alpha particle radiation dose is counted in the corresponding detection area of ​​the planar source facing the measuring hole 201 using the alpha spectrometer. After the initial measurement, move the cover 200 axially to detach it from the sample stage 100. Rotate the cover 200 once in a fixed direction (clockwise or counterclockwise) according to the set angle, so that the measuring hole 201 rotates to the next equally divided area of ​​the planar source, i.e., the new detection area. Place the sample stage 100 in the sample chamber in the above position, and use an alpha spectrometer to count the alpha particle emission in this detection area. The counting time is the same as the previous operation steps. Repeat the above detection operation process until the measuring hole 201 rotates back to the initial position. Record the measurement data for each measurement and analyze the differences between the data sets. If the count rate deviation between the data sets is not greater than the inherent deviation value of the instrument, and the differences between the data sets are within a reasonable fluctuation range, it indicates that the sample source has good homogeneity. After the experiment, immerse and clean the components in acid for easy reuse.

[0067] Please see Figures 5 to 6As described above, the difference between Embodiment 2 and Embodiment 1 of the component of this application lies in the shape of the radial opening 102. The remaining parts that are structurally the same as those in Embodiment 1 will not be described again here. In Embodiment 2, for the component in which both the upper outer wall of the sample stage 100 and the outer wall of the cover 200 are set as polygonal prisms, when the shape of the radial opening 102 is set as a regular polygon, the opening shape of the measuring hole 201 is an isosceles triangle. The base of the measuring hole 201 of the isosceles triangle is preferably set to be parallel to the inner side of one of the second wall surfaces 202 of the cover 200 and the third wall surface 204 that is parallel to and opposite to the second wall surface 202. Thus, after the cover 200 is fastened onto the sample stage 100, the bottom edge of the measuring hole 201 is located on one of the sides A1021 of the radiation opening 102 and corresponds to the equally divided area of ​​the plane containing side A1021. The measuring hole 201 can also be aligned with the corresponding first wall surface 103 on the outer wall of the sample stage 100. After the cover 200 is rotated by a set angle or any integer multiple of the set angle, the measuring hole 201 can accurately correspond to any one of the twelve equally divided areas of the planar source. During the detection process, by marking the corresponding third wall surface 204 and first wall surface 103, the rotational position of the measuring hole 201 relative to the sample stage 100 and each equally divided area of ​​the radiation opening 102 can be determined. This facilitates the detection operation and avoids repeated detection or missed detection caused by the measuring hole 201 repeatedly corresponding to or skipping a certain equally divided area of ​​the radiation opening 102, thus improving detection accuracy.

[0068] The outer wall contour of the sample stage 100 with the receiving groove 101 provided in this application can also be set in other forms.

[0069] Please see Figures 8 to 9 This is Embodiment 4 of the components of this application. The difference between Embodiment 4 and Embodiment 1 lies in the different outer wall structure of the sample stage 100 and the inner wall structure of the cover. The remaining parts that are structurally identical to Embodiment 1 will not be described again. In Embodiment 4, the outer wall contour of the sample stage 100 is set as a cylindrical structure, and the inner wall contour of the cover 200 is a matching circular groove. Since there is no prism-structured wall surface restriction, the cover 200 can rotate freely relative to the sample stage 100 around the central axis 10. Simultaneously, in order to limit the rotation angle of the cover 200, a corresponding positioning structure (not shown) is needed to limit the position of the cover 200, ensuring that the cover 200 can rotate according to the set angle each time.

[0070] Please see Figures 8 to 9The positioning structure includes n positioning grooves 105 disposed between the sample stage 100 and the cover 200, and at least one elastic positioning member 300. Preferably, the n positioning grooves 105 are circumferentially disposed on the outer wall of the cylindrical structure of the sample stage 100, and are evenly arranged around the central axis 10. When the cover 200 rotates relative to the sample stage 100 to the set angle, the elastic positioning member 300 elastically engages with the corresponding positioning groove 105. In this embodiment, n is taken as 12, and the set angle is 30°. The number of positioning grooves 105 is the same as the number of equally divided regions of the planar source corresponding to the measuring hole 201, ensuring that after the cover 200 rotates at the set angle or any integer multiple of the set angle under the constraint of the positioning structure, the measuring hole 201 can correspond to one of the equally divided regions of the planar source.

[0071] Preferably, the elastic positioning member 300 adopts a positioning top bead assembly, which includes a top bead 301, a spring 302, and a clamping member 303. Correspondingly, a through hole 205 for accommodating the positioning top bead assembly is provided radially through the inner wall of the cover 200. Under the limitation of the clamping member 303, the spring 302 elastically presses the top bead 301 to drive the end of the top bead 301 to extend through the inner opening of the through hole 205 and move against the outer wall surface of the sample stage or move and lock in the positioning groove 105.

[0072] During the rotation of the cover 200, the top bead 301 of the positioning top bead assembly elastically retracts into the through hole 205 under the pressure of the outer wall of the sample stage. After the cover 200 rotates to the set angle, the top bead 301 of the positioning top bead assembly elastically extends and locks into the corresponding positioning groove 105, thereby positioning the cover 200. Since the cover 200 is rotatably connected to the sample stage 100 and the rotation angle is limited by the positioning structure, during the testing operation, it is not necessary to move the cover 200 axially to separate it from the sample stage 100. The cover 200 can be directly driven to rotate relative to the sample stage 100 at a set angle without separating the two, which facilitates continuous testing operations, greatly improves the convenience of testing operations, and can further improve testing efficiency.

[0073] In addition, to facilitate defining the position of the measuring hole 201 relative to the sample stage 100 after each rotation, marks or scales can be made on the corresponding positions of the sample stage 100, the outer wall or top surface of the cover 200 (not shown in the figure).

[0074] The above are merely preferred embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A component for verifying the uniformity of a planar radiation source, comprising a sample stage (100) and a cover (200), characterized in that, A planar radiation source is placed on the sample stage (100), and the sample stage (100) is provided with a radiation opening (102) for the radiation source to radiate outward; the cover (200) is movably connected to the sample stage (100) and closes the radiation opening (102), and the cover (200) rotates relative to the sample stage (100) at a set angle about the central axis (10) of the radiation opening (102); The cover (200) is provided with a measuring hole (201) through the radial opening (102) at the position corresponding to the radial opening (102). The measuring hole (201) extends radially from the central axis (10) to the periphery of the radial opening (102), and the shape of the measuring hole (201) is 1 / n of the shape of the radial opening (102), where n is an integer greater than 1 and n is equal to the ratio of 360° to the set angle.

2. The component for verifying the uniformity of a planar radiation source according to claim 1, characterized in that, One end of the sample stage (100) is provided with a receiving groove (101) formed inward along the central axis (10). The opening of the receiving groove (101) on the end face of the sample stage (100) forms the radiation opening (102). The radiation source is disposed in the receiving groove (101).

3. The component for verifying the uniformity of a planar radiation source according to claim 2, characterized in that, The inner wall contour of the cover (200) matches the outer wall contour of the sample stage (100) at one end where the receiving groove (101) is located; The shape of the radial opening (102) includes a circle, a regular polygon, or a centrally symmetric polygon that does not include a regular polygon. When the radial opening (102) is a circle, the opening shape of the measuring hole (201) is fan-shaped. When the shape of the radial opening (102) is a regular polygon, the opening shape of the measuring hole (201) is an isosceles triangle. When the shape of the radial opening (102) is a centrally symmetric polygon that does not include a regular polygon, the opening shape of the measuring hole (201) is the shape formed by connecting one of the constituent units of the centrally symmetric polygon to its center.

4. The component for verifying the uniformity of a planar radiation source according to claim 3, characterized in that, When the radial opening (102) is circular, the center of the fan-shaped measuring hole (201) is located on the central axis (10), the radius of the measuring hole (201) is equal to the radius of the radial opening (102), the central angle of the measuring hole (201) is equal to the set angle, and the arc length of the measuring hole (201) is equal to 1 / n of the circumference of the radial opening (102).

5. The component for verifying the uniformity of a planar radiation source according to claim 3, characterized in that, When the radial opening (102) is a regular polygon, it has n sides A (1021) of equal length; the vertex of the isosceles triangle measuring hole (201) is located on the central axis (10), the length of the waist of the measuring hole (201) is equal to the radius of the circumcircle of the radial opening (102), the vertex angle of the measuring hole (201) is equal to the set angle, the length of the base of the measuring hole (201) is equal to the length of any one of the sides A (1021) of the radial opening (102), and the base of the measuring hole (201) is aligned with any one of the sides A (1021) of the radial opening (102).

6. The component for verifying the uniformity of a planar radiation source according to any one of claims 3-5, characterized in that, The sample stage (100) has a multi-prism structure on the outer wall of one end of the receiving groove (101), including n first wall surfaces (103) with the same structure. The first wall surfaces (103) are evenly arranged around the central axis (10) and extend axially. The inner wall of the cover (200) includes n second wall surfaces (202) with the same structure. The second wall surfaces (202) are evenly arranged around the central axis (10) and extend axially. When the cover (200) is rotated according to the set angle and fastened to the sample stage (100), the second wall surface (202) and the first wall surface (103) are attached one-to-one.

7. The component for verifying the uniformity of a planar radiation source according to claim 6, characterized in that, When the radial opening (102) is circular, the arc of the arc-shaped measuring hole (201) is aligned with one of the second wall surfaces (202); When the radial opening (102) is a regular polygon, it has n sides A (1021) of equal length, and the sides A (1021) are parallel to the corresponding first wall surface (103); the base of the isosceles triangle measuring hole (201) is parallel to one of the second wall surfaces (202).

8. The assembly for verifying the uniformity of a planar radiation source according to claim 7, characterized in that, The outer wall of the cover (200) is a polygonal prism structure, including n third wall surfaces (204) with the same structure. The third wall surfaces (204) are evenly arranged around the central axis (10) and extend axially. The third wall surfaces (204) are parallel to the corresponding second wall surfaces (202).

9. The component for verifying the uniformity of a planar radiation source according to any one of claims 3-5, characterized in that, The sample stage (100) has a cylindrical outer wall at one end where the receiving groove (101) is located. The cover (200) is rotatably connected to the sample stage (100). Under the constraint of the positioning structure, the cover (200) rotates relative to the sample stage (100) at the set angle.

10. The assembly for verifying the uniformity of a planar radiation source according to claim 9, characterized in that, The positioning structure includes n positioning grooves (105) and at least one elastic positioning member (300) disposed between the sample stage (100) and the cover (200). The n positioning grooves (105) are evenly arranged around the central axis (10). When the cover (200) rotates relative to the sample stage (100) to the set angle, the elastic positioning member (300) is elastically locked into the corresponding positioning groove (105).

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