A high-purity germanium detector crystal clamping device
By designing a three-point clamping device consisting of a clamping body made of polytetrafluoroethylene and a rubber buffer head, the problem of surface damage to high-purity germanium detector crystals during processing was solved, achieving a stable clamping effect without damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG QINGLANHUA INNOVATION TECHNOLOGY CO LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-07-21
Smart Images
Figure CN224536186U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of high-purity germanium semiconductor detectors, and specifically to a crystal clamping device for a high-purity germanium detector. Background Technology
[0002] High-purity germanium detectors are among the world's best-performing gamma-ray spectroscopy detectors, possessing unique advantages such as high energy resolution and high detection efficiency. They have wide applications in fields such as homeland security, nuclear power, environmental protection, basic research, and military industry, and are of significant strategic importance.
[0003] The high-purity germanium detector crystal is the core component of a high-purity germanium detector. Its fabrication process is complex and requires extremely high technical expertise. It can be stored at room temperature and operates at liquid nitrogen temperature. Its basic principle is that X-ray particles interact with the detector within its sensitive volume. The number of electron-hole pairs generated is proportional to the energy deposited. These electrons and holes drift under the influence of an electric field, generating an output signal in the output circuit, thus acquiring information about the incident particle. Traditional semiconductor detectors have a thin sensitive region, making it difficult to detect highly penetrating X-rays. High-purity germanium detectors utilize a PN junction depletion layer formed from a high-purity germanium single crystal with extremely low impurity content. The depletion layer increases in size with increasing electric field. If the electric field is strong enough, the entire high-purity germanium crystal can become the depletion layer, i.e., the sensitive region. High-purity germanium detectors are characterized by a large sensitive region thickness and high resistivity, resulting in high energy resolution and high detection efficiency.
[0004] The fabrication of high-purity germanium detectors requires specific processing steps. First, the crystal needs mechanical processing. The 13N high-purity germanium crystal raw material is processed into an ideal shape according to parameters such as impurity concentration. The crystal surface is then chemically treated with strong oxidizing agents. High-purity germanium detector electrodes are fabricated using methods such as thermal resistance evaporation, electron beam evaporation, magnetron sputtering, and ion implantation, and the intrinsic region is passivated. Finally, the high-purity germanium crystal with the prepared electrodes is assembled into a matching device. During crystal assembly, the humidity and temperature of the assembly area must be strictly monitored, as these factors directly affect the crystal's electrical performance. High-purity germanium detectors using P-type intrinsic high-purity germanium material as a substrate are called P-type high-purity germanium detectors. The N+ electrode is typically achieved through lithium diffusion, with a thickness of approximately 500-800 μm, while the P+ electrode is produced using boron ion implantation, with a thickness typically around 0.3-0.5 μm. The N+ and P+ electrodes are separated by the intrinsic plane of the germanium crystal, and surface passivation is often used to reduce detector leakage current.
[0005] After semiconductor chemical treatment, electrode preparation, and surface passivation, the surface of high-purity germanium detector crystals is not suitable for manual handling. Therefore, in subsequent processing steps, it is often necessary to use a jig to hold it. However, existing jigs can easily scratch the surface of high-purity germanium detector crystals when holding them, which cannot meet the processing and use requirements of high-purity germanium detector crystals. Utility Model Content
[0006] To solve the above-mentioned technical problems, a high-purity germanium detector crystal clamping device is provided, which solves the technical problems that the high-purity germanium detector crystal is not suitable for hand contact during processing and that the use of conventional clamps can easily cause surface damage.
[0007] To achieve the above objectives, the following solution is provided: a high-purity germanium detector crystal clamping device, comprising a clamping body and fastening bolts, wherein the fastening bolts are installed at the clamping body;
[0008] The clamping body includes a fixing mechanism and a movable mechanism. The movable mechanism is installed at one end of the fixing mechanism. The fixing mechanism includes a fixing plate, a connecting plate, a first fixing plate, and a second fixing plate. A connecting plate is fixedly disposed at one end of the fixing plate. The connecting plate extends vertically downward along the side end of the fixing plate. A first fixing clamp and a second fixing clamp are fixedly disposed at the end of the connecting plate away from the fixing plate. The first fixing clamp and the second fixing clamp are symmetrically disposed at the connecting plate.
[0009] An extension plate extends horizontally from the end of the fixed plate away from the connecting plate, and a support plate extends vertically downward from the end of the extension plate away from the fixed plate. The support plate is fixedly installed with the extension plate, and a screw hole is provided at the end of the support plate away from the extension plate. The screw hole is perpendicular to the connecting plate, and the fastening bolt is screwed into the screw hole.
[0010] Furthermore, the fixing plate has a fan-shaped structure, the connecting plate is vertically arranged downward along the arc edge of the fixing plate, the extension plate extends outward along the center end of the fixing plate and the extension plate is located on the center line of the fixing plate, and the connecting plate, the first fixing clamping plate and the second fixing clamping plate are all arc-shaped plates.
[0011] Furthermore, the first fixing plate and the second fixing plate have the same structure.
[0012] Furthermore, a buffer head is provided at the threaded end of the fastening bolt.
[0013] Furthermore, the buffer head is made of rubber material.
[0014] Furthermore, the clamping body is made of polytetrafluoroethylene material.
[0015] The working principle and advantages of this utility model are as follows: This high-purity germanium detector crystal clamping device places the high-purity germanium detector crystal between the first fixed clamping plate, the second fixed clamping plate, and the support plate, so that the side of the high-purity germanium detector crystal abuts against the first and second fixed clamping plates. By screwing the fastening bolts into the screw holes on the support plate, the buffer head at the end of the fastening bolt presses against the side of the high-purity germanium detector crystal, thus fixing and clamping it. The entire clamping body of this device is made of polytetrafluoroethylene material, and together with the buffer head made of rubber material, it can clamp the detector crystal firmly while effectively reducing the risk of the detector crystal being scratched, thus meeting the user's processing and use needs for high-purity germanium detector crystals. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0017] The reference numerals in the accompanying drawings include:
[0018] 1. Fixing plate, 2. Extension plate, 3. Connecting plate, 4. First fixing clamp, 5. Second fixing clamp, 6. Support plate, 7. Screw hole, 8. Fastening bolt, 9. Buffer head. Detailed Implementation
[0019] The following detailed explanation illustrates the specific implementation methods:
[0020] like Figure 1 As shown:
[0021] A high-purity germanium detector crystal clamping device includes a clamping body and a fastening bolt 8. The fastening bolt 8 is installed at the clamping body and works in conjunction with the clamping body to fix the high-purity germanium detector crystal in the clamping body.
[0022] The clamping body includes a fixed mechanism and a movable mechanism. The movable mechanism is installed at one end of the fixed mechanism. The fixed mechanism serves as a fixed support component for the side of the high-purity germanium detector. The movable mechanism serves as an adjustment component. Together with the fastening bolt 8, it can adjust the corresponding clamping space and clamping force. The fixed mechanism includes a fixed plate 1, a connecting plate 3, a first fixed plate 1, and a second fixed plate 1. The connecting plate 3 is fixedly installed at one end of the fixed plate 1. The connecting plate 3 extends vertically downward along the side end of the fixed plate 1. The first fixed clamping plate 4 and the second fixed clamping plate 5 are fixedly installed at the end of the connecting plate 3 away from the fixed plate 1. The first fixed clamping plate 4 and the second fixed clamping plate 5 are symmetrically arranged at the connecting plate 3. The connecting plate 3, the first fixed clamping plate 4, and the second fixed clamping plate 5 form a "door" shaped structure.
[0023] An extension plate 2 extends horizontally from the end of the fixed plate 1 away from the connecting plate 3. A support plate 6 extends vertically downward from the end of the extension plate 2 away from the fixed plate 1. The extension plate 2 and the support plate 6 form a “7” shaped structure. The support plate 6, the first fixed clamping plate 4, and the second fixed clamping plate 5 form a three-point fixing method to clamp and fix the high-purity germanium detector crystal. The support plate 6 is fixedly set to the extension plate 2. A screw hole 7 is provided at the end of the support plate 6 away from the extension plate 2. The screw hole 7 is set perpendicular to the connecting plate 3. The fastening bolt 8 is screwed into the screw hole 7.
[0024] The fixing plate 1 has a fan-shaped structure, the connecting plate 3 is set vertically downward along the arc edge of the fixing plate 1, the extension plate 2 extends outward along the center end of the fixing plate 1 and the extension plate 2 is located on the center line of the fixing plate 1. The connecting plate 3, the first fixing clamp 4 and the second fixing clamp 5 are all arc-shaped plates, so that the surfaces of the first fixing clamp 4 and the second fixing clamp 5 have an arc-shaped structure, which is more compatible with the surface of the cylindrical high-purity germanium detector crystal and makes the clamping of the high-purity germanium detector crystal more stable.
[0025] The first fixing plate 4 and the second fixing plate 5 have the same structure.
[0026] A buffer head 9 is provided at the threaded end of the fastening bolt 8. The buffer head 9 is made of rubber material, which can prevent the fastening bolt 8 from directly pressing against the high-purity germanium detector crystal and causing damage to the surface of the high-purity germanium detector crystal.
[0027] The clamping body is made of polytetrafluoroethylene, which reduces the possibility of damage to the high-purity germanium detector.
[0028] The specific implementation process is as follows:
[0029] When using this high-purity germanium detector crystal clamping device, first place the high-purity germanium detector crystal between the first fixed clamping plate 4, the second fixed clamping plate 5, and the support plate 6, so that the side of the high-purity germanium detector crystal abuts against the inner side of the first fixed clamping plate 4 and the second fixed clamping plate 5. Then, screw the fastening bolt 8 into the screw hole 7 of the support plate 6, so that the fastening screw is screwed toward one side of the two fixed plates 1, so that the buffer head at the end of the fastening bolt 8 presses against the side of the high-purity germanium detector crystal. The fastening bolt 8, the first fixed clamping plate 4, and the second fixed clamping plate 5 can form a three-point clamping and fixing of the high-purity germanium detector crystal.
[0030] This high-purity germanium detector crystal clamping device places the high-purity germanium detector crystal between the first fixed clamping plate 4, the second fixed clamping plate 5, and the support plate 6, so that the side of the high-purity germanium detector crystal abuts against the first fixed clamping plate 4 and the second fixed clamping plate 5. By screwing the fastening bolt 8 into the screw hole 7 on the support plate 6, the buffer head 9 at the end of the fastening bolt 8 presses against the side of the high-purity germanium detector crystal, thus fixing it in place. The entire clamping body of this device is made of polytetrafluoroethylene material, and together with the buffer head 9 made of rubber material, it can firmly clamp the detector crystal while effectively reducing the risk of the detector crystal being scratched, thus meeting the user's processing and use needs for high-purity germanium detector crystals.
[0031] The above description is merely an embodiment of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the applicability of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A high-purity germanium detector crystal clamping device, characterized in that: It includes a clamping body and fastening bolts, wherein the fastening bolts are installed at the clamping body; The clamping body includes a fixing mechanism and a movable mechanism. The movable mechanism is installed at one end of the fixing mechanism. The fixing mechanism includes a fixing plate, a connecting plate, a first fixing plate, and a second fixing plate. A connecting plate is fixedly disposed at one end of the fixing plate. The connecting plate extends vertically downward along the side end of the fixing plate. A first fixing clamp and a second fixing clamp are fixedly disposed at the end of the connecting plate away from the fixing plate. The first fixing clamp and the second fixing clamp are symmetrically disposed at the connecting plate. An extension plate extends horizontally from the end of the fixed plate away from the connecting plate, and a support plate extends vertically downward from the end of the extension plate away from the fixed plate. The support plate is fixedly installed with the extension plate, and a screw hole is provided at the end of the support plate away from the extension plate. The screw hole is perpendicular to the connecting plate, and the fastening bolt is screwed into the screw hole.
2. The high-purity germanium detector crystal clamping device according to claim 1, characterized in that: The fixing plate has a fan-shaped structure, the connecting plate is set vertically downward along the arc edge of the fixing plate, the extension plate extends outward along the center end of the fixing plate and the extension plate is located on the center line of the fixing plate, and the connecting plate, the first fixing clamp and the second fixing clamp are all arc-shaped plates.
3. The high-purity germanium detector crystal clamping device according to claim 1, characterized in that: The first fixing plate and the second fixing plate have the same structure.
4. The high-purity germanium detector crystal clamping device according to claim 1, characterized in that: A buffer head is provided at the threaded end of the fastening bolt.
5. The high-purity germanium detector crystal clamping device according to claim 4, characterized in that: The buffer head is made of rubber material.
6. The high-purity germanium detector crystal clamping device according to claim 1, characterized in that: The clamping body is made of polytetrafluoroethylene.