A photomultiplier voltage divider network debugging device and debugging method

Abstract

The application relates to the technical field of vacuum electron devices, and discloses a photomultiplier voltage division network debugging device, which comprises multiple potentiometers, wires, a support, a tube seat, a high-voltage connector, a BNC connector and a photomultiplier. The potentiometers are fixed equidistantly on the top of the support, the potentiometers and the tube seat are connected through the wires, and the photomultiplier is installed on the tube seat. The potentiometers are connected through the wires, and the tube seat is installed on the side of the support. The high-voltage connector is arranged on the left side of the support and is connected with the potentiometer. The BNC connector is arranged on the left side of the support and is connected with the anode of the photomultiplier. The power supply voltage of each multiplier is accurately distributed, the parameter performance and consistency of the photomultiplier are optimized, the method is simple and fast, can be applied to different models and types of photomultipliers, and has the characteristics of wide application range, strong applicability and high adjustment precision.

Description

Technical Field

[0001] This invention relates to the field of vacuum electronic device technology, specifically to a photomultiplier tube voltage divider network debugging device and debugging method. Background Technology

[0002] Photomultiplier tubes are vacuum electronic devices that convert weak light signals into electrical signals and amplify them. They have wide and important applications in fields such as spectral analysis, biological detection, and radiation detection.

[0003] Voltage divider networks in photomultiplier tubes (PMTs) are typically used to distribute the potentials of the PMT's various dynodes. Different distribution ratios in these networks have a crucial impact on the PMT's performance parameters. Different PMT structures (cage-type, inline, fast, box-grid, and louvered) typically exhibit different characteristics. For example, cage-type PMTs are characterized by good time response and high gain, while inline PMTs are characterized by short electron transit times and a wide pulse linearity range. Existing PMT voltage divider networks usually employ uniform or tapered voltage dividers, achieving typical product parameters but not maximum values. Therefore, for PMTs with different PMT structures, it is often necessary to redistribute the potentials among the dynodes to optimize their performance.

[0004] Therefore, the present invention aims to provide a photomultiplier tube voltage divider network debugging device and debugging method to improve the shortcomings of the prior art. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a debugging device and method for a photomultiplier tube voltage divider network, which solves the problems that existing photomultiplier tube voltage divider networks typically use uniform voltage divider circuits or tapered voltage divider circuits, resulting in parameters that cannot reach extreme values ​​and poor consistency.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a photomultiplier tube voltage divider network debugging device, comprising multiple potentiometers, wires, a bracket, a tube socket, a high-voltage connector, a BNC connector, and a photomultiplier tube, wherein the potentiometers are fixed at equal intervals on the top of the bracket, the potentiometers are connected to the tube socket through wires, and the photomultiplier tube is mounted on the tube socket; The potentiometers are connected by wires, and the tube socket is mounted on the side of the bracket; The high-voltage connector is located on the upper left side of the bracket and is connected to the potentiometer; The BNC connector is located on the lower left side of the bracket and is connected to the anode of the photomultiplier tube.

[0007] Preferably, the support is made of polytetrafluoroethylene.

[0008] Preferably, the potentiometer has a specification of 500KΩ and a quantity of 18.

[0009] A method for debugging a photomultiplier tube voltage divider network includes the following steps: S1. Connect the high-voltage power supply and adjust the resistance: Connect the high voltage power supply output terminal to the high voltage connector, and at the same time connect the corresponding terminals of each multiplier electrode on the tube socket to the potentiometer in sequence through wires; S2. Form a standard uniform voltage distribution network: Connect the output signal line to the microammeter or oscilloscope on the test bench via a BNC connector, and adjust the potentiometer resistance to form a standard uniform voltage divider network. S3. Adjust the voltage divider potentiometer of the photomultiplier tube and observe the output: Connect the photomultiplier tube to be tested to the tube socket, turn on the high voltage power supply, observe the magnitude of the anode output current of the photomultiplier tube, or observe the magnitude of the output signal amplitude through an oscilloscope, adjust the resistance value of the cathode voltage divider potentiometer to the final stage grounding potentiometer in sequence, and stop when the anode output current or signal amplitude reaches the maximum. S4. Record the optimal voltage divider network parameters: Record the voltage division ratio of each potentiometer at this time, which is the optimal voltage divider network parameter.

[0010] Preferably, in step S2, the resistance of the potentiometer is adjusted to 100KΩ.

[0011] Preferably, in step S3, the magnitude of the photomultiplier tube anode output current is observed using a micro-ammeter on a test bench.

[0012] This invention provides a device and method for debugging a photomultiplier tube voltage divider network. It has the following advantages: 1. This invention is applicable to photomultiplier tubes with different multiplication system structures and different numbers of multiplication poles, and has the characteristics of wide application range, strong applicability and high adjustment accuracy.

[0013] 2. This invention precisely allocates the power supply voltage of each dynode, optimizes the parameter performance and consistency of the photomultiplier tube, and the method is simple, fast and applicable to different models and types of photomultiplier tubes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structural composition of the present invention.

[0015] The components include: 1. Potentiometer; 2. Wire; 3. Bracket; 4. Pipe socket; 5. High-voltage connector; 6. BNC connector. Detailed Implementation

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example:

[0017] Please see the appendix Figure 1 This invention provides a photomultiplier tube voltage divider network debugging device, including multiple potentiometers 1, wires 2, brackets 3, tube sockets 4, high-voltage connectors 5, BNC connectors 6, and photomultiplier tubes. The potentiometers 1 are fixed at equal intervals on the top of the brackets 3, the potentiometers 1 are connected to the tube sockets 4 through wires 2, and the photomultiplier tubes are mounted on the tube sockets 4. Potentiometers 1 are connected to each other via wires 2, and tube sockets 4 are mounted on the side of brackets 3; The high-voltage connector 5 is located on the upper left side of the bracket 3 and is connected to the potentiometer 1; BNC connector 6 is located on the lower left side of bracket 3 and is connected to the anode of photomultiplier tube.

[0018] In the structure provided by the device of the present invention, the support 3 is made of polytetrafluoroethylene (PTFE), which is a synthetic polymer material with excellent chemical stability and wear resistance. Using PTFE to make the support 3 in the present invention has the following advantages: Corrosion resistance: Polytetrafluoroethylene has excellent corrosion resistance and can resist the erosion of various chemicals such as acids, alkalis, and organic solvents. Therefore, it is suitable for the manufacture of stents that require corrosion resistance.

[0019] Non-adhesive: The surface of polytetrafluoroethylene has extremely low surface tension, making it an extremely non-adhesive material. This means that dirt, grease and chemicals do not easily adhere to the surface of the support 3, making it easy to clean and also reducing friction on the surface of the support 3 of the present invention.

[0020] High temperature resistance: Polytetrafluoroethylene can maintain stability over a wide temperature range and has good high temperature resistance, making it suitable for use in high-temperature environments.

[0021] Electrical insulation: Polytetrafluoroethylene (PTFE) is an excellent electrical insulating material with good insulation properties, and is therefore suitable for the application of the electrical support 3 of this invention.

[0022] Abrasion resistance: Polytetrafluoroethylene has good abrasion resistance, which enables the support 3 made of it to maintain the smoothness of the surface and the stability of the shape for a long time.

[0023] It should be noted that the support structure 3 provided in this invention needs to take into account its mechanical strength and rigidity during manufacturing to ensure that the support 3 can meet specific usage requirements.

[0024] In summary, brackets made of polytetrafluoroethylene (PTFE) have advantages such as corrosion resistance, non-adhesion, high temperature resistance, electrical insulation, and wear resistance, making them suitable for various special environments and specific requirements.

[0025] Specifically, in the device of the present invention, the potentiometer 1 has a specification of 500KΩ and a quantity of 18; A 500KΩ potentiometer 1 typically refers to a variable resistor with a resistance of 500 kiloohms, also known as a knob potentiometer or rotary potentiometer 1. As an electronic component, it is mainly used in this invention to adjust the resistance value in a circuit. This potentiometer 1 usually consists of a rotatable knob and a set of variable resistors. The resistance value of the potentiometer 1 is changed by rotating the knob. The "500KΩ" in potentiometer 1 indicates that its resistance value is 500 kiloohms (500,000 ohms). This means that in a circuit, the resistance value can be adjusted by rotating the knob of potentiometer 1, thereby changing the characteristics of the circuit, such as volume, brightness, frequency, etc.

[0026] Meanwhile, the advantages of the 500KΩ potentiometer 1 include: Wide adjustment range: Due to its large resistance value, the 500KΩ potentiometer 1 can provide a wide adjustment range, making it suitable for circuits that require large resistance changes.

[0027] High precision: Generally speaking, the resistance adjustment precision of potentiometer 1 depends on its manufacturing process and materials. Potentiometer 1 with higher resistance value usually has higher adjustment precision.

[0028] Suitable for high-impedance load circuits: In some circuits that require connection to high-impedance loads, a 500KΩ potentiometer can provide the required resistance range.

[0029] In summary, the 500KΩ potentiometer 1 is a common variable resistor. Its large resistance value and adjustment range make it suitable for many electronic circuits that require large resistance changes, and it has a good application effect in the device of this invention.

[0030] Furthermore, this embodiment also provides a method for debugging a photomultiplier tube voltage divider network. The method for debugging a photomultiplier tube voltage divider network mentioned above specifically includes the following steps: S1. Connect the high-voltage power supply and adjust the resistance: In step S1, first connect the output terminal of the high-voltage power supply to the high-voltage connector 5. At the same time, connect the corresponding terminals of each multiplier electrode on the tube socket 4 to the potentiometer 1 in sequence through the wire 2. Then, the resistance of the potentiometer 1 needs to be adjusted to 100KΩ to ensure that the resistance in the circuit meets the design requirements. The purpose of this step is to establish an initial circuit connection and ensure that the resistance of the potentiometer 1 reaches the preset value, so as to prepare for subsequent testing and adjustment.

[0031] S2. Form a standard uniform voltage distribution network: In step S2, the output signal line needs to be connected to the test bench microammeter or oscilloscope through BNC connector 6, and the resistance of potentiometer 1 needs to be adjusted to form a standard uniform voltage divider network. The key to this step is to ensure that the output signal line is correctly connected to the test bench microammeter or oscilloscope, and to establish a standard uniform voltage divider network by adjusting the resistance of potentiometer 1, so that the photomultiplier tube under test can be tested and adjusted in the future.

[0032] S3. Adjust the voltage divider potentiometer of the photomultiplier tube and observe the output: In step S3, the photomultiplier tube under test needs to be connected to the tube socket 4 and the high-voltage power supply needs to be turned on. Then, observe the magnitude of the anode output current of the photomultiplier tube, or observe the magnitude of the output signal amplitude through an oscilloscope. During this process, the resistance values ​​of the cathode voltage divider potentiometer 1 to the final stage grounding potentiometer 1 need to be adjusted sequentially. Stop adjusting when the anode output current or signal amplitude reaches its maximum. Specifically, the magnitude of the anode output current of the photomultiplier tube can be observed using a micro-ammeter on the test bench. The purpose of this step is to gradually adjust the voltage divider potentiometer 1 of the photomultiplier tube based on the observation results so that the output current or signal amplitude reaches the optimal state.

[0033] S4. Record the optimal voltage divider network parameters: Finally, in step S3, it is necessary to record the voltage division ratio of each potentiometer 1 at this time, which is the optimal voltage division network parameter. These parameters will serve as a reference for the testing and adjustment of the photomultiplier tube to ensure that the photomultiplier tube can achieve the best performance in practical applications. Recording these parameters is very important for subsequent experimental reproduction and data analysis.

[0034] The above steps together constitute a complete process for testing and adjusting photomultiplier tubes, ensuring the accuracy and repeatability of the tests.

[0035] The photomultiplier tube voltage divider network debugging device provided in this embodiment, together with its debugging method, can be applied to photomultiplier tubes with different multiplication system structures and different numbers of multiplier poles. It has the characteristics of wide application range, strong applicability and high adjustment accuracy. At the same time, the present invention optimizes the parameter performance and consistency of photomultiplier tubes by accurately distributing the power supply voltage of each multiplier pole. The method is simple and fast to operate and can be applied to different models and types of photomultiplier tubes.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A debugging method for a photomultiplier tube voltage divider network debugging device, characterized in that, The debugging device includes multiple potentiometers (1), wires (2), brackets (3), tube sockets (4), high voltage connectors (5), BNC connectors (6) and photomultiplier tubes. The potentiometers (1) are fixed at equal intervals on the top of the brackets (3). The potentiometers (1) and tube sockets (4) are connected by wires (2). The photomultiplier tubes are installed on the tube sockets (4). The potentiometers (1) are connected to each other by wires (2), and the tube socket (4) is installed on the side of the bracket (3); The high-voltage connector (5) is located on the upper left side of the bracket (3) and is connected to the potentiometer (1); The BNC connector (6) is located on the lower left side of the bracket (3) and is connected to the anode of the photomultiplier tube; The debugging method includes the following steps: S1. Connect the high-voltage power supply and adjust the resistance: Connect the high voltage power supply output terminal to the high voltage connector (5), and connect the corresponding terminals of each multiplier electrode on the tube socket (4) to the potentiometer (1) in sequence through the wire (2); adjust the resistance of the potentiometer (1) to 100KΩ to ensure that the resistance in the circuit meets the design requirements; S2. Form a standard uniform voltage distribution network: Connect the output signal line to the micrometer or oscilloscope on the test bench via the BNC connector (6), and adjust the resistance of the potentiometer (1) to form a standard uniform voltage divider network. S3. Adjust the voltage divider potentiometer of the photomultiplier tube and observe the output: Connect the photomultiplier tube to be tested to the tube socket (4), turn on the high voltage power supply, observe the magnitude of the anode output current of the photomultiplier tube, or observe the magnitude of the output signal amplitude through an oscilloscope, adjust the resistance of the cathode voltage divider potentiometer (1) to the final stage grounding potentiometer (1) in sequence, and stop when the anode output current or signal amplitude reaches the maximum. S4. Record the optimal voltage divider network parameters: Record the voltage division ratio of each potentiometer (1) at this time, which is the optimal voltage division network parameter.

2. The debugging method of the photomultiplier tube voltage divider network debugging device according to claim 1, characterized in that, The support (3) is made of polytetrafluoroethylene.

3. The debugging method of the photomultiplier tube voltage divider network debugging device according to claim 1, characterized in that, The potentiometer (1) has a specification of 500KΩ and a quantity of 18.

4. The debugging method of the photomultiplier tube voltage divider network debugging device according to claim 1, characterized in that, In step S2, the resistance of potentiometer (1) is adjusted to 100KΩ.

5. The debugging method of the photomultiplier tube voltage divider network debugging device according to claim 1, characterized in that, In step S3, the magnitude of the anode output current of the photomultiplier tube is observed using a micro-ammeter on the test bench.

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