Photomultiplier tube device

Abstract

The utility model provides a photomultiplier tube device, which solves the problems that the existing photomultiplier tube is poor in cooling efficiency and affects the working performance of the photomultiplier tube, and comprises a thermal insulation layer and a refrigeration module, an electromagnetic shielding tube is arranged in the thermal insulation layer, and the photomultiplier tube is inserted on a tube seat and arranged in the electromagnetic shielding tube; the heat preservation layer is further provided with an opening, and the end, away from the pipe base, of the electromagnetic shielding pipe is attached to the refrigeration module through the opening of the heat preservation layer. Through the opening design of the heat preservation layer, the refrigeration module is directly and tightly attached to the electromagnetic shielding pipe, the size of the opening of the heat preservation layer is matched with the attaching size of the refrigeration module and the electromagnetic shielding pipe, direct and efficient heat transfer is achieved, meanwhile, temperature control over the environment where the photomultiplier is located is achieved, and it is guaranteed that the working temperature is stable; therefore, the detection result of the photomultiplier is accurate and reliable.

Description

Technical Field

[0001] This utility model relates to the field of photomultiplier tubes, and specifically to a photomultiplier tube device. Background Technology

[0002] Photomultiplier tubes (PMTs) are photoelectric vacuum measurement devices with significant characteristics such as high gain, low noise, and good high-frequency response. They are widely used in many fields, including electronics, mechanics, chemical engineering, geology, metallurgy, medicine, nuclear industry, astronomy, and space research. To maintain stability, reliability, and reduce noise, PMTs typically require cooling and insulation. However, existing auxiliary cooling devices for PMTs have poor heat dissipation performance, resulting in inefficient cooling and difficulty in maintaining the PMT at a suitable temperature during operation, thus affecting its performance. Furthermore, these devices are relatively complex in structure and have high manufacturing costs. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a photomultiplier tube device that solves the problem of poor cooling efficiency in existing photomultiplier tubes, which affects their working performance.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides a photomultiplier tube device, including an insulation layer and a cooling module. An electromagnetic shielding tube is provided inside the insulation layer, and the photomultiplier tube is inserted into the tube base and placed in the electromagnetic shielding tube. The insulation layer also has an opening, and the end of the electromagnetic shielding tube away from the tube base is attached to the cooling module through the opening of the insulation layer.

[0006] In this invention, a photomultiplier tube is placed inside an electromagnetic shielding tube, with a gap between the photomultiplier tube and the electromagnetic shielding tube, ensuring they do not contact each other. This electromagnetic shielding tube design reduces external electromagnetic interference, significantly improving the stability of the photomultiplier tube's operation and further ensuring the accuracy of weak light signal measurement results. The electromagnetic shielding tube is typically made of metal, which has excellent thermal conductivity. An opening in the insulation layer allows the cooling module to be directly and tightly fitted to the electromagnetic shielding tube. The opening size of the insulation layer is adapted to the fit between the cooling module and the electromagnetic shielding tube, achieving direct and efficient heat transfer. This enables temperature control of the photomultiplier tube's environment, ensuring stable operating temperature and resulting in accurate and reliable photomultiplier tube detection results. Simultaneously, it optimizes the system structure, reduces the overall size, and facilitates miniaturization and portability, allowing for flexible adaptation to different working environments and experimental requirements.

[0007] As a technical solution, the cooling module includes a semiconductor cooling chip and a heat sink. The cold end of the semiconductor cooling chip is in contact (or connected) to one end of the electromagnetic shielding tube, and the hot end is in contact (or connected) to the heat sink, thus constructing an efficient cooling and heat dissipation mechanism.

[0008] Furthermore, it also includes a conductive block, with the semiconductor cooling chip pressing the conductive block against the electromagnetic shielding tube; or a thermally conductive material (such as a thermally conductive silicone pad) is applied to the contact surface between the semiconductor cooling chip and the electromagnetic shielding tube to improve cooling efficiency.

[0009] Furthermore, it also includes a first temperature sensor and a temperature control unit. The first temperature sensor is in contact with the electromagnetic shielding tube. The first temperature sensor and the semiconductor cooling chip are electrically connected to the temperature control unit. The first temperature sensor is used to measure the temperature of the electromagnetic shielding tube and feed back the measured temperature signal to the temperature control unit. The temperature control unit adjusts the cooling power of the semiconductor cooling chip according to the temperature signal.

[0010] Furthermore, the outer surface of the radiator is provided with several heat dissipation fins. Preferably, the radiator adopts a one-piece cast aluminum structure to improve heat dissipation efficiency.

[0011] Furthermore, it also includes a second temperature sensor, which is located inside the insulation layer and is used to measure the temperature of the insulation layer.

[0012] As a technical solution, it also includes a side window, which is fixed to the outer surface of the insulation layer. The electromagnetic shielding tube and the insulation layer are provided with through holes at corresponding positions, and the size of the through holes matches the size of the light-entry surface of the side window. The side window passes through the through holes of the insulation layer and the electromagnetic shielding tube along the axial direction, and the external light is directly detected by the photomultiplier tube through the side window.

[0013] As a technical solution, the end of the electromagnetic shielding tube away from the tube base is constructed as an arc shape, or the end of the electromagnetic shielding tube away from the tube base is chamfered to form a structure without protruding edges, so as to optimize the electromagnetic shielding effect, better protect the photomultiplier tube, and enhance structural stability.

[0014] As a technical solution, the insulation layer is filled with insulation material (such as polyurethane thermal insulation material) for efficient insulation.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a photomultiplier tube device. Through the opening design of the insulation layer, the cooling module can be directly attached to the electromagnetic shielding tube, which can realize direct and efficient heat transfer, thereby realizing temperature control of the environment in which the photomultiplier tube is located. Attached Figure Description

[0016] Appendix Figure 1This is a schematic diagram of the photomultiplier tube device in Example 1.

[0017] Appendix Figure 2 This is a schematic diagram of the photomultiplier tube device in Example 2.

[0018] The attached diagram shows: 1-Second temperature sensor, 2-Cooling module, 3-Insulation layer, 4-Electromagnetic shielding tube, 5-Pipe base, 6-Opening, 7-Semiconductor cooling chip, 8-Heat sink, 9-First temperature sensor, 10-Side window, 11-Photomultiplier tube, 12-Conduction block. Detailed Implementation Example 1

[0019] This embodiment discloses a photomultiplier tube device, such as... Figure 1 As shown, the system includes an insulation layer 3 and a cooling module 2. The insulation layer 3 is filled with polyurethane insulation material and contains an electromagnetic shielding tube 4. A photomultiplier tube 11 is inserted into a tube base 5 and placed inside the electromagnetic shielding tube 4. The insulation layer 3 also has an opening 6, through which the end of the electromagnetic shielding tube 4 away from the tube base 5 is attached to the cooling module 2. The end of the electromagnetic shielding tube 4 away from the tube base 5 is chamfered. The cooling module 2 includes a semiconductor cooling chip 7 and a heat sink 8. The cold end of the semiconductor cooling chip 7 presses against the conductive block 12 and is attached to the electromagnetic shielding tube 4, while the hot end is in contact with the heat sink 8. The heat sink 8 has an integral cast aluminum structure and several heat dissipation fins on its outer surface. The outer surface of the insulation layer 3 is also provided with a side window 10. Both the electromagnetic shielding tube 4 and the insulation layer 3 are provided with through holes, and the size of the through holes is the same as the size of the light-entering surface of the side window 10. The side window penetrates the through holes of the insulation layer 3 and the electromagnetic shielding tube 4 along the axial direction, and external light is directly detected by the photomultiplier tube 11 through the side window 10. Example 2

[0020] This embodiment discloses a photomultiplier tube device, such as... Figure 2As shown, the system includes an insulation layer 3, a cooling module 2, a first temperature sensor 9, a second temperature sensor 1, and a temperature control unit. The insulation layer 3 is filled with polystyrene insulation material and contains an electromagnetic shielding tube 4. A photomultiplier tube 11 is inserted into a tube base 5 and placed inside the electromagnetic shielding tube 4. The insulation layer 3 also has an opening 6, through which the end of the electromagnetic shielding tube 4 away from the tube base 5 is attached to the cooling module 2. The end of the electromagnetic shielding tube 4 away from the tube base 5 is chamfered. The cooling module 2 includes a thermoelectric cooler 7 and a heat sink 8. The cold end of the thermoelectric cooler 7 is attached to the electromagnetic shielding tube 4, and thermally conductive silicone grease is applied to the contact surface. The hot end is in contact with the heat sink 8, which includes several heat dissipation fins. The first temperature sensor 9 is in contact with the electromagnetic shielding tube 4 and measures its temperature. The measured temperature signal is fed back to the temperature control unit, which adjusts the cooling power of the thermoelectric cooler 7 according to the temperature signal. The second temperature sensor 1 is located inside the insulation layer 3 and is used to measure the temperature of the insulation layer 3. A side window 10 is also provided, which is fixedly installed on the outer surface of the insulation layer 3. The electromagnetic shielding tube 4 and the insulation layer 3 are provided with through holes at corresponding positions, and the size of the through holes is the same as the size of the light-entry surface of the side window 10. The side window penetrates the insulation layer 3 and the through hole of the electromagnetic shielding tube 4 along the axial direction, and external light is directly detected by the photomultiplier tube 11 after passing through the side window 10.

[0021] The specific embodiments of this utility model have been described above with reference to the accompanying drawings. However, those skilled in the art should understand that the above embodiments are for illustrative purposes only and are not intended to limit the scope of this utility model. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this utility model. The scope of protection of this utility model is defined by the appended claims.

Claims

1. A photomultiplier tube device, characterized in that, It includes an insulation layer (3) and a cooling module (2); the insulation layer (3) is provided with an electromagnetic shielding tube (4), and a photomultiplier tube (11) is inserted into the tube seat (5) and placed in the electromagnetic shielding tube (4); the insulation layer (3) is also provided with an opening (6), and the end of the electromagnetic shielding tube (4) away from the tube seat (5) is attached to the cooling module (2) through the opening (6) of the insulation layer.

2. The photomultiplier tube device according to claim 1, characterized in that, The cooling module (2) includes a semiconductor cooling chip (7) and a heat sink (8). The cold end of the semiconductor cooling chip (7) is in contact with the electromagnetic shielding tube (4), and the hot end is in contact with the heat sink (8).

3. The photomultiplier tube device according to claim 2, characterized in that, It also includes a conductive block (12), wherein the semiconductor cooling chip (7) presses the conductive block (12) against the electromagnetic shielding tube (4); or a thermally conductive material is applied to the contact surface between the semiconductor cooling chip (7) and the electromagnetic shielding tube (4).

4. The photomultiplier tube device according to claim 2, characterized in that, It also includes a first temperature sensor (9) and a temperature control unit. The first temperature sensor (9) is in contact with the electromagnetic shielding tube (4) and is used to measure the temperature of the electromagnetic shielding tube (4) and feed back the measured temperature signal to the temperature control unit. The temperature control unit adjusts the cooling power of the semiconductor refrigeration chip (7) according to the temperature signal.

5. A photomultiplier tube device according to claim 2, characterized in that, The outer side of the radiator (8) is provided with several heat dissipation fins.

6. The photomultiplier tube device according to claim 1, characterized in that, It also includes a second temperature sensor (1), which is located inside the insulation layer (3) and is used to measure the temperature of the insulation layer (3).

7. A photomultiplier tube device according to claim 1, characterized in that, It also includes a side window (10), which is fixed to the outer surface of the insulation layer (3). The electromagnetic shielding tube (4) and the insulation layer (3) are provided with through holes at corresponding positions, and the size of the through holes matches the size of the light-entry surface of the side window. The side window passes through the through holes of the insulation layer (3) and the electromagnetic shielding tube (4) along the axial direction, and the external light is directly detected by the photomultiplier tube (11) through the side window (10).

8. A photomultiplier tube device according to claim 1, characterized in that, The insulation layer (3) is filled with insulation material.

9. A photomultiplier tube device according to claim 1, characterized in that, The end of the electromagnetic shielding tube (4) away from the tube seat (5) is constructed as an arc shape, or the end of the electromagnetic shielding tube (4) away from the tube seat (5) is chamfered to form a structure without protruding edges.

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