A tool for testing a crystal

Abstract

The application discloses a tool for crystal testing and belongs to the field of crystal tool clamps. A hollow cavity is arranged in the protective tube, a top cover is movably arranged in the hollow cavity and is in sealing connection with the inner side wall of the hollow cavity, and the inner side wall of the hollow cavity is provided with a light reflection film. In this way, the closed structure formed by the hollow cavity of the protective tube, the top cover and the photomultiplier tube can shield ambient light, can replace a darkroom to avoid light saturation of the photomultiplier tube, and the light reflection film can replace the crystal coating work before testing, greatly reducing the time required for testing and repetitive work. The clamping part can fix the crystal in the hollow cavity to prevent sliding and maintain the accuracy of the energy spectrum graph. The top cover and the protective tube are in transmission connection along the extension direction of the hollow cavity, the lifting of the top cover can be controlled, the position of the crystal in the vertical direction can be limited after the top cover contacts the crystal, and the top cover can be used for placing a radioactive source, and different radioactive source height tests can be realized.

Description

Technical Field

[0001] This application relates to the field of crystal tooling and fixture technology, and in particular to a tooling for crystal testing. Background Technology

[0002] A scintillation crystal is composed of a certain amount of scintillation material in a suitable form. For components sensitive to ionizing radiation, a scintillation crystal can convert the kinetic energy of high-energy particles such as X-rays and gamma rays into light energy and emit a flash of light when struck. Typically, scintillation crystals are used in conjunction with photomultiplier tubes or photosensitive semiconductor devices. The principle is that when energy rays shine on the scintillation crystal, it emits a weak flash of light, which is captured and received by the photocathode of the photomultiplier tube and converted into an electrical signal. This electrical signal is then multiplied and output.

[0003] To obtain accurate data, current scintillation crystal performance testing requires frosting or coating the crystal with reflective materials. Coating with reflective materials provides the best light collection effect, but in actual testing, each crystal needs to be coated before testing, which greatly increases the time required for crystal performance testing. Utility Model Content

[0004] This application provides a fixture for crystal testing. It solves the problem of cumbersome crystal pretreatment in existing technologies for crystal performance testing. The technical solution is as follows: On the one hand, a crystal testing fixture is provided, the crystal testing fixture comprising: a protective tube, a light-reflecting film, a top cover, and a clamping component; The protective tube has a hollow cavity extending along its length, and a first opening and a second opening distributed at both ends of the protective tube and respectively communicating with the hollow cavity. The light-reflecting film is connected to the inner wall of the hollow cavity of the protective tube; The top cover is installed into the hollow cavity through the first opening and is connected to the protective tube for transmission, so as to move along the extension direction of the hollow cavity. The circumferential side of the top cover is in sealed contact with the inner wall of the hollow cavity. The side of the top cover facing the first opening is used to install a radiation source. The clamping component is mounted on the protective tube and is at least partially located within the hollow cavity. The portion of the clamping component located within the hollow cavity has a clamping space facing the top cover and the second opening. The clamping component is configured to clamp a crystal through the clamping space. The photomultiplier tube is installed at the second opening of the protective tube.

[0005] Optionally, the crystal testing fixture further includes a first light-reflecting film, which is connected to the side of the top cover facing the crystal.

[0006] Optionally, the inner wall of the hollow cavity of the protective tube has an internal thread, and the part of the top cover that is connected to the protective tube in a transmission manner has an external thread that mates with the internal thread.

[0007] Optionally, the top cover includes a cover plate and a handle, wherein the cover plate is drivenly connected to the protective tube, and the handle is fixedly connected to the side of the cover plate opposite to the crystal.

[0008] Optionally, the protective tube has a communicating cavity on its side that communicates with the hollow cavity; the clamping component includes: a drive rod, a transmission component and three clamping plates, the transmission component has a clearance hole that communicates with the hollow cavity, the three clamping plates are connected to the transmission component and are distributed around the axis of the clearance hole, and the end clamps of the three clamping plates form a coaxial arrangement with the clearance hole and communicate with the clamping space; The first end of the drive rod passes through the communicating cavity and is connected to the transmission component. The drive rod is configured to drive the three clamping plates to swing during movement relative to the protective tube, so as to clamp the crystal through the clamping space formed by the end clamps of the three clamping plates.

[0009] Optionally, the transmission component includes: an elastic element and a wheel stacked with the three clamping plates. The central region of the wheel has the clearance hole, and the edge portion of the wheel has three protrusions distributed around the clearance hole and corresponding to the three clamping plates. The first end of each clamping plate is fastened to the corresponding protrusion, and the second end of the clamping plate is an end clamp. The portion of the clamping plate located between the first end and the second end is rotatably connected to the side wall of the communicating cavity. The first end of the drive rod passes through the communicating cavity and is fastened to the edge of the wheel. The elastic element is sleeved on the drive rod, with one end fastened to the first end or the second end of the drive rod, and the other end of the elastic element is fastened to the side wall of the communicating cavity. The drive rod is configured to drive the wheel to rotate in different directions during the telescopic movement relative to the protective tube, thereby synchronously driving the three clamping plates to swing.

[0010] Optionally, the first end of the clamp has a first connecting hole, and the protrusion corresponding to the clamp has a second connecting hole communicating with the first connecting hole; the first end of the clamp and the corresponding protrusion are fastened together by a connecting pin passing through the first connecting hole and the second connecting hole.

[0011] Optionally, the protective tube has a mounting platform fixed to the inner wall of the hollow cavity and close to the second opening, the mounting platform being used to install the photomultiplier tube.

[0012] The beneficial effects of the technical solutions provided in this application include at least the following: By incorporating a hollow cavity within the protective tube, a top cover is movably positioned within the cavity and sealed to its inner wall, which is also equipped with a light-reflecting film. This sealed structure, formed by the hollow cavity, top cover, and photomultiplier tube, effectively blocks ambient light, replacing the need for a darkroom and preventing photomultiplier tube light saturation. Furthermore, the light-reflecting film replaces the pre-test crystal coating process, significantly reducing testing time and repetitive tasks. A clamping component secures the crystal within the hollow cavity, preventing slippage and maintaining the accuracy of the energy spectrum. The top cover's transmission connection to the protective tube along the cavity's extension direction allows for control of its lifting and lowering. Upon contact with the crystal, it restricts the crystal's vertical position. Simultaneously, the top cover can be used to place a radioactive source, enabling testing at different source heights. Attached Figure Description

[0013] 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 accompanying 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.

[0014] Figure 1 This is a front view of a crystal testing fixture provided in an embodiment of this application; Figure 2 This is a partial structural schematic diagram of a crystal testing fixture provided in an embodiment of this application; Figure 3 This is a partial structural schematic diagram of another crystal testing fixture provided in an embodiment of this application; Figure 4 yes Figure 3 The top view of the crystal testing fixture shown.

[0015] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0019] In related technologies, crystal testing also requires placing the crystal in the center of the photomultiplier tube end window and avoiding slippage in order to maintain the full-energy peak from shifting. However, after applying the coupling agent, the crystal is very easy to slip, resulting in inaccurate test results.

[0020] Please refer to Figure 1 and Figure 2 , Figure 1 This is a front view of a crystal testing fixture provided in an embodiment of this application. Figure 2 This is a partial structural schematic diagram of a crystal testing fixture provided in an embodiment of this application. The crystal testing fixture may include: a protective tube 100, a light-reflecting film 200, a top cover 300, and a clamping component 400.

[0021] The protective tube 100 in the crystal testing fixture may have a hollow cavity 101 extending along its length, and a first opening k1 and a second opening k2 distributed at both ends of the protective tube 100 and respectively communicating with the hollow cavity 101.

[0022] The optical reflective film 200 in the crystal testing fixture can be connected to the inner wall of the hollow cavity 101 of the protective tube 100. For example, the optical reflective film 200 may comprise a film layer made of optical epoxy resin A or optical epoxy resin B, or Teflon.

[0023] The top cover 300 of the crystal testing fixture can be installed into the hollow cavity 101 of the protective tube 100 through the first opening k1 of the protective tube 100 and is connected to the protective tube 100 for transmission, so as to move along the extension direction of the hollow cavity 101. The circumferential side of the top cover 300 is in sealed contact with the inner wall of the hollow cavity 101. Here, the side of the top cover 300 facing the first opening can be used to install the radiation source X.

[0024] The clamping component 400 in the crystal testing fixture can be mounted on the protective tube 100 and is at least partially located within the hollow cavity 101 of the protective tube 100. The portion of the clamping component 400 located within the hollow cavity 101 can have a clamping space K facing the top cover 300 and a second opening. The clamping component 400 can be configured to clamp the crystal through the clamping space K. Here, after the crystal is clamped in the clamping space K of the clamping component 400, the top cover 300 can be moved so that the side of the top cover 300 facing the crystal can still contact the crystal.

[0025] The photomultiplier tube A can be installed at the second opening k2 of the protective tube 100. For example, the protective tube 100 has a mounting platform 102 fixed to the inner wall of the hollow cavity 101 and close to the second opening k2, which is used to install the photomultiplier tube.

[0026] In this embodiment, a hollow cavity 101 is provided in the protective tube 100, and a top cover 300 is movably disposed within the hollow cavity 101 and sealed to the inner wall of the hollow cavity 101. A light-reflecting film 200 is provided on the inner wall of the hollow cavity 101. Thus, the sealed structure formed by the hollow cavity 101 of the protective tube 100, the top cover 300, and the photomultiplier tube A can block ambient light, replacing the need for a darkroom and preventing photomultiplier tube light saturation. Furthermore, the light-reflecting film 200 can replace the crystal coating work before testing, significantly reducing the testing time and repetitive work. The clamping component 400 can fix the crystal within the hollow cavity 101 to prevent slippage and maintain the accuracy of the energy spectrum. The top cover 300 is connected to the protective tube 100 along the extension direction of the hollow cavity 101, allowing control of the top cover 300's lifting and lowering. After contacting the crystal, it can restrict the crystal's vertical position. Simultaneously, the top cover 300 can be used to place the radioactive source X, enabling testing at different radioactive source heights.

[0027] In summary, this application provides a crystal testing fixture, which may include: a protective tube, a light-reflecting film, a top cover, and a clamping component. By providing a hollow cavity within the protective tube, the top cover is movably disposed within the hollow cavity and sealed to the inner wall of the hollow cavity, and the inner wall of the hollow cavity is provided with a light-reflecting film. Thus, the sealed structure formed by the hollow cavity of the protective tube, the top cover, and the photomultiplier tube can block ambient light, replacing the need for a darkroom and preventing photomultiplier tube light saturation. Furthermore, the light-reflecting film can replace the crystal coating work before testing, significantly reducing the testing time and repetitive work. The clamping component can fix the crystal within the hollow cavity to prevent slippage and maintain the accuracy of the energy spectrum. The top cover, connected to the protective tube along the extension direction of the hollow cavity, allows for control of the top cover's lifting and lowering. After contacting the crystal, it can restrict the crystal's vertical position. Simultaneously, the top cover can be used to place a radiation source, enabling testing at different radiation source heights.

[0028] For example, the protective tube 100 may be made of a black material, or a black light-absorbing film may be provided on the outer surface of the protective tube 100 to absorb ambient light and provide a dark chamber environment for crystal testing.

[0029] Optional, such as Figure 1 As shown, the crystal testing fixture may further include a first optical reflective film 500, which can be connected to the side of the top cover 300 facing the crystal. In this way, the optical reflective film 200 and the first optical reflective film 500 can further enhance the coating effect on the crystal and improve the accuracy of crystal performance testing. For example, the first optical reflective film 500 may include a film layer made of optical epoxy resin A or optical epoxy resin B, or Teflon.

[0030] In this embodiment, the inner wall of the hollow cavity 101 of the protective tube 100 may have internal threads (not shown in the figure), and the portion of the top cover 300 that is connected to the protective tube 100 may have external threads that engage with the internal threads. Thus, the top cover 300 and the inner wall of the hollow cavity 101 of the protective tube 100 are connected via threads, which not only allows the top cover 300 to move up and down within the hollow cavity 101, but also seals the space between the top cover 300 and the inner wall of the hollow cavity 101, ensuring a sealed environment for crystal testing.

[0031] For example, such as Figure 1 As shown, the top cover 300 may include a cover plate 301 and a handle 302. The cover plate 301 can be drivenly connected to the protective tube 100, and the handle 302 can be fixedly connected to the side of the cover plate 301 facing away from the crystal. In this way, the operator can easily drive the cover plate 301 to move via the handle 302 to adjust the position of the top cover 300. Here, the circumferential side of the cover plate 301 may have external threads, which mate with the internal threads on the inner wall of the hollow cavity 101 in the protective tube 100.

[0032] Optional, please refer to Figure 3 and Figure 4 , Figure 3 This is a partial structural schematic diagram of another crystal testing fixture provided in an embodiment of this application. Figure 4 yes Figure 3The diagram shows a top view of the crystal testing fixture. The protective tube 100 may have a connecting cavity 103 on its side, communicating with the hollow cavity 101. The clamping component 400 may include a drive rod 401, a transmission component 402, and three clamping plates 403. The transmission component 402 may have a clearance hole k3 that is opposite to and communicates with the hollow cavity 101. The three clamping plates 403 are all drivenly connected to the transmission component 402 and are axially distributed around the clearance hole k3. The end clamps 403a of the three clamping plates 403 form a clamping space K that is coaxially arranged and communicates with the clearance hole k3. The first end of the drive rod 401 may pass through the connecting cavity 103 and be drivenly connected to the transmission component 402. The drive rod 401 may be configured to drive the three clamping plates 403 to swing synchronously during movement relative to the protective tube 100 via the transmission component 402, thereby clamping the crystal through the clamping space K formed by the end clamps 403a of the three clamping plates 403. Here, the second end of the drive rod 401 can extend out of the protective tube through the connecting cavity 103. The three clamping plates 403 in the clamping component 400 are arranged in the same layer.

[0033] In this configuration, before the crystal is placed into the hollow cavity 101, the operator can drive the drive rod 401 to move, which in turn drives the three clamping plates 403 to swing via the transmission component 402. This causes the end clamps 403a of the three clamping plates 403 to move away from each other, thereby expanding the clamping space K. After the crystal is placed into the clamping space K, the drive rod 401 is released, and under the action of the transmission component 402, the end clamps 403a of the three clamping plates 403 move closer together to clamp the crystal. Here, to further improve the light reflection performance, an optical reflective film can also be provided on the outer surface of the clamping plates 403.

[0034] For example, in the preparation and assembly of the protective tube 100 and the clamping component 400, the protective tube 100 may include two tube segments arranged opposite each other. After a connecting cavity is opened in one of the tube segments, the clamping component 400 is installed, and the ends of the two tube segments are fixed. Alternatively, a portion of the connecting cavity is opened in each tube segment, and after the clamping component 400 is installed, the ends of the two tube segments are fixed to form the connecting cavity.

[0035] In this application, as Figure 3As shown, the transmission component 402 in the clamping component 400 may include: an elastic element 402a, and a wheel 402b stacked with three clamping plates 403. The central region of the wheel 402b has a clearance hole k3, and the edge portion of the wheel 402b has three protrusions T axially distributed around the clearance hole k3 and corresponding to the three clamping plates 403. The first end of each clamping plate 403 is fastened to the corresponding protrusion T, and the second end of the clamping plate 403 is an end chuck 403a. The portion of the clamping plate 403 located between the first end and the second end is rotatably connected to the side wall of the communicating cavity 103. The first end of the drive rod 401 passes through the communicating cavity 103 and is fastened to the edge of the wheel 402b. The elastic element 402a is sleeved on the drive rod 401, with one end fastened to the first end or the second end of the drive rod 401, and the other end of the elastic element 402a is fastened to the side wall of the communicating cavity 103. The drive rod 401 is configured to rotate the wheel 402b in different directions during its telescopic movement relative to the protective tube 100, thereby synchronously causing the three clamping plates 403 to swing. Here, the first end of the drive rod 401 is close to the wheel 402b, and the second end of the drive rod 401 is far away from the wheel 402b relative to the first end; the three clamping plates 403 can be closer to the photomultiplier tube A relative to the wheel 402b, or the wheel 402b can be closer to the photomultiplier tube A relative to the three clamping plates 403.

[0036] For example, such as Figure 3 As shown, when the drive rod 401 is pulled, the wheel 402b rotates clockwise, which in turn causes the three clamping plates 403 to deflect clockwise, so that the first ends of the three clamping plates 403 move away from each other. Simultaneously, the elastic element 402a is compressed during the pulling of the drive rod 401. After the crystal is placed in the clamping space K formed by the first ends of the three clamping plates 403, releasing the drive rod 401 causes it to retract under the restoring action of the elastic element 402a, and the wheel 402b rotates counterclockwise, causing the three clamping plates 403 to deflect counterclockwise, thus clamping the crystal through their first ends. In other possible implementations, when the drive rod 401 is pushed, the wheel 402b rotates counterclockwise, which in turn causes the three clamping plates 403 to deflect counterclockwise, so that the first ends of the three clamping plates 403 move away from each other. Meanwhile, the elastic element 402a is stretched during the push of the drive rod 401. After the crystal is placed in the clamping space K formed by the first ends of the three clamping plates 403, the drive rod 401 is released and driven to extend under the reset action of the elastic element 402a, and the wheel 402b rotates in the clockwise direction, thereby causing the three clamping plates 403 to deflect in the clockwise direction, so as to clamp the crystal through the first ends of the three clamping plates 403.

[0037] In this application, the projection shape of the clamping plate 403 on the wheel 402b can be an obtuse triangle, the pointed angle of the first end of the clamping plate is an acute angle, the pointed angle of the second end of the clamping plate 403 is an acute angle, and the pointed angle of the portion of the clamping plate 403 located between the first end and the second end is an obtuse angle.

[0038] Optional, such as Figure 3 As shown, the first end of the clamping plate 403 may have a first connecting hole k4, and the protrusion T corresponding to the clamping plate 403 may have a second connecting hole k5 communicating with the first connecting hole k4. The first end of the clamping plate 403 and the corresponding protrusion T are fastened together by connecting pins passing through the first connecting hole k4 and the second connecting hole k5.

[0039] Here, the portion of the clamping plate 403 located between the first end and the second end is rotatably connected to the side wall of the communicating cavity 103 via a rotating shaft.

[0040] In summary, this application provides a crystal testing fixture, which may include: a protective tube, a light-reflecting film, a top cover, and a clamping component. By providing a hollow cavity within the protective tube, the top cover is movably disposed within the hollow cavity and sealed to the inner wall of the hollow cavity, and the inner wall of the hollow cavity is provided with a light-reflecting film. Thus, the sealed structure formed by the hollow cavity of the protective tube, the top cover, and the photomultiplier tube can block ambient light, replacing the need for a darkroom and preventing photomultiplier tube light saturation. Furthermore, the light-reflecting film can replace the crystal coating work before testing, significantly reducing the testing time and repetitive work. The clamping component can fix the crystal within the hollow cavity to prevent slippage and maintain the accuracy of the energy spectrum. The top cover, connected to the protective tube along the extension direction of the hollow cavity, allows for control of the top cover's lifting and lowering. After contacting the crystal, it can restrict the crystal's vertical position. Simultaneously, the top cover can be used to place a radiation source, enabling testing at different radiation source heights.

[0041] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0042] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fixture for crystal testing, characterized in that, include: Protective tube, light-reflecting film, top cover, and clamping components; The protective tube has a hollow cavity extending along its length, and a first opening and a second opening distributed at both ends of the protective tube and respectively communicating with the hollow cavity. The light-reflecting film is connected to the inner wall of the hollow cavity of the protective tube; The top cover is installed into the hollow cavity through the first opening and is connected to the protective tube for transmission, so as to move along the extension direction of the hollow cavity. The circumferential side of the top cover is in sealed contact with the inner wall of the hollow cavity. The side of the top cover facing the first opening is used to install a radiation source. The clamping component is mounted on the protective tube and is at least partially located within the hollow cavity. The portion of the clamping component located within the hollow cavity has a clamping space facing the top cover and the second opening. The clamping component is configured to clamp a crystal through the clamping space. The photomultiplier tube is installed at the second opening of the protective tube.

2. The jig for crystal test according to claim 1, characterized by The crystal testing fixture further includes a first light-reflecting film, which is connected to the side of the top cover facing the crystal.

3. The jig for crystal test according to claim 1, wherein The inner wall of the hollow cavity of the protective tube has internal threads, and the part of the top cover that is connected to the protective tube has external threads that mate with the internal threads.

4. The tooling for testing crystals according to claim 3, wherein The top cover includes a cover plate and a handle. The cover plate is connected to the protective tube in a driving connection, and the handle is fixedly connected to the side of the cover plate away from the crystal.

5. The jig for testing a crystal according to any one of claims 1 to 4, wherein The protective tube has a communicating cavity on its side that communicates with the hollow cavity; the clamping component includes: a drive rod, a transmission component and three clamping plates, the transmission component has a clearance hole that communicates with the hollow cavity, the three clamping plates are connected to the transmission component and are distributed around the axis of the clearance hole, and the end clamps of the three clamping plates are arranged coaxially with the clearance hole and communicate with the clamping space. The first end of the drive rod passes through the communicating cavity and is connected to the transmission component. The drive rod is configured to drive the three clamping plates to swing during movement relative to the protective tube, so as to clamp the crystal through the clamping space formed by the end clamps of the three clamping plates.

6. The tooling for testing crystals of claim 5 wherein, The transmission component includes: an elastic element and a wheel stacked with three clamping plates. The central region of the wheel has the clearance hole, and the edge portion of the wheel has three protrusions distributed around the clearance hole and corresponding to the three clamping plates. The first end of each clamping plate is fastened to the corresponding protrusion, and the second end of the clamping plate is an end clamp. The portion of the clamping plate located between the first end and the second end is rotatably connected to the side wall of the communicating cavity. The first end of the drive rod passes through the communicating cavity and is fastened to the edge of the wheel. The elastic element is sleeved on the drive rod, with one end fastened to the first end or the second end of the drive rod, and the other end of the elastic element is fastened to the side wall of the communicating cavity. The drive rod is configured to drive the wheel to rotate in different directions during the telescopic movement relative to the protective tube, thereby synchronously driving the three clamping plates to swing.

7. The tooling for testing crystals of claim 6 wherein, The first end of the clamp has a first connecting hole, and the protrusion corresponding to the clamp has a second connecting hole communicating with the first connecting hole; the first end of the clamp and the corresponding protrusion are fastened together by a connecting pin passing through the first connecting hole and the second connecting hole.

8. The tooling for testing crystals of claim 5 wherein, The protective tube has a mounting platform fixed to the inner wall of the hollow cavity and close to the second opening, the mounting platform being used to install the photomultiplier tube.

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