Double-microchannel plate annular power transmission clamping device and mass spectrometer

Abstract

The utility model discloses a double-microchannel plate annular power transmission clamping device and a mass spectrometer, and relates to the technical field of photoelectric detection, and the device comprises a supporting structure which is provided with a supporting end and a connecting end, and the connecting end is connected with the tail end of the mass spectrometer; the power transmission structure is arranged on the supporting end; the power transmission structure comprises a power transmission main body, the power transmission main body is provided with a mounting groove, and a first annular power transmission sheet, at least two microchannel plates connected in series and a second annular power transmission sheet are sequentially arranged in the power transmission main body; a first pole plate is arranged on the side, away from the supporting end, of the power transmission body and electrically connected with the second annular power transmission piece and the high-voltage power source. A second polar plate is arranged between the two micro-channel plates, and the second polar plate is electrically connected with the two micro-channel plates; a third polar plate is arranged on one side, far away from the micro-channel plate, of the first annular power transmission sheet and is electrically connected with the first annular power transmission sheet; the micro-channel plate is connected with an anode; the accuracy and the recognizability of related detection data of the mass spectrometer are improved.

Description

Technical Field

[0001] This application generally relates to the field of photoelectric detection technology, and specifically to a dual microchannel plate annular power transmission clamping device and a mass spectrometer. Background Technology

[0002] A microchannel plate (MCP) is a planar component used for the detection of particles (including electrons, ions, and neutrons, collectively referred to as ions) in devices such as mass spectrometers (MS). Currently, MCPs can be mounted in mass spectrometers using fixed structures that hold the MCP in place and within the ion path.

[0003] Existing mounting structures are only suitable for the installation and protection of a single microchannel plate, and cannot be used for two or more microchannel plates, resulting in low gain, making them unsuitable for time-of-flight mass spectrometry applications and affecting ion flight. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a dual microchannel plate ring power transmission clamping device and mass spectrometer that increases gain and has strong applicability.

[0005] In a first aspect, this application provides a dual-microchannel plate annular power transmission clamping device, comprising:

[0006] A support structure having a support end and a connecting end, the connecting end being connected to the end of the mass spectrometer;

[0007] A power transmission structure is disposed on the support end. The power transmission structure includes: a power transmission body having a mounting groove, in which a first annular power transmission plate, at least two microchannel plates connected in series and a second annular power transmission plate are sequentially disposed, with the first annular power transmission plate disposed close to the support end; a first electrode plate is disposed on the side of the power transmission body away from the support end, and the first electrode plate is electrically connected to the second annular power transmission plate and a high-voltage power supply; a second electrode plate is disposed between the two microchannel plates, and the second electrode plate is electrically connected to the two microchannel plates; a third electrode plate is disposed on the side of the first annular power transmission plate away from the microchannel plates, and the third electrode plate is electrically connected to the first annular power transmission plate; the first electrode plate and the third electrode plate are connected by an insulating column; and an anode is connected to the microchannel plate.

[0008] When the high-voltage power supply is in a conductive state, it transmits high-voltage electricity to the first and second annular transmission plates through the first, second, and third plates, thereby applying high-voltage electricity to the surface of the microchannel plate and forming an electric field inside the microchannel plate. Furthermore, when the anode receives the electrical signal generated by ions in the mass spectrometer, the electrical signal accelerates under the action of the electric field and collides with the inner wall of the microchannel plate, generating secondary electron emission, which multiplies the electrical signal.

[0009] According to the technical solution provided in the embodiments of this application, the supporting component includes:

[0010] A support base, one end of which forms the connecting end, and the other end of which is provided with at least three evenly distributed support rods; the end of each support rod away from the support base forms the support end.

[0011] According to the technical solution provided in the embodiments of this application, the power transmission body includes:

[0012] A limiting ring is provided, with a protective outer shell covering the limiting ring; the limiting ring has a mounting groove; the limiting ring is connected to the support rod.

[0013] A fixing plate is disposed on the side of the limiting ring near the supporting structure and is used to install the anode.

[0014] According to the technical solution provided in the embodiments of this application, the protective shell is provided with two stacked clamping members at one end away from the support rod. The clamping members are annular in shape and have a grid at their center.

[0015] According to the technical solution provided in the embodiments of this application, an insulating gasket is provided between the fixing plate and the third electrode plate.

[0016] According to the technical solution provided in the embodiments of this application, the protective shell is made of polyetheretherketone resin.

[0017] According to the technical solution provided in the embodiments of this application, the anode is connected to the microchannel plate through the first transmission column; the third electrode plate is connected to the first annular transmission sheet through the second transmission column; and the first electrode plate is connected to the third electrode plate through the third transmission column.

[0018] The technical solution provided according to the embodiments of this application also includes: a voltage adjustment circuit;

[0019] The voltage adjustment circuit includes:

[0020] A first voltage regulating circuit, one end of which is connected to the high voltage power supply, and the other end of which is connected to one end of the second voltage regulating circuit;

[0021] A current-limiting resistor R5 is connected at one end to the free end of the second voltage regulating circuit, and at the other end to the first end and the anode of the DC blocking capacitor C1; the second end of the DC blocking capacitor C1 is connected to the first end and the input terminal of the sampling resistor R6; the second end of the sampling resistor R6 is grounded.

[0022] The first equivalent resistor Rm1 and the second equivalent resistor Rm2 are connected in parallel with the first voltage regulating circuit; the resistance values ​​of the first equivalent resistor Rm1 and the second equivalent resistor Rm2 are equal to the resistance values ​​of the two microchannel plates.

[0023] According to the technical solution provided in the embodiments of this application, the first voltage regulating circuit includes:

[0024] A first-stage voltage divider resistor R1 and a second-stage voltage divider resistor R2 are provided. The first end of the first-stage voltage divider resistor R1 is connected to the high-voltage power supply, and the second end of the first-stage voltage divider resistor R1 is connected to the first end of the second-stage voltage divider resistor R2.

[0025] The second voltage regulating circuit includes:

[0026] An anode voltage divider resistor R3 and a voltage regulating resistor R4 are provided. The first end of the anode voltage divider resistor R3 is connected to the second end of the secondary voltage divider resistor R2. The second end of the anode voltage divider resistor R3 is connected to the first end of the voltage regulating resistor R4. The second end of the voltage regulating resistor R4 is connected to the high-voltage power supply.

[0027] Secondly, this application provides a mass spectrometer, characterized in that it includes: the aforementioned dual microchannel plate annular power transmission clamping device.

[0028] As can be seen from the above technical solution, this application has at least the following beneficial effects:

[0029] This application provides a dual-microchannel plate annular power transmission clamping device, comprising: a support structure having a support end and a connecting end, the connecting end being connected to the end of a mass spectrometer; and a power transmission structure disposed on the support end; the power transmission structure comprising: a power transmission body having a mounting groove, wherein a first annular power transmission plate, at least two microchannel plates connected in series and a second annular power transmission plate are sequentially disposed therein, and the first annular power transmission plate is disposed close to the support end; a first electrode plate is disposed on the side of the power transmission body away from the support end, and the first electrode plate and the second annular power transmission plate are electrically connected to a high-voltage power supply; a second electrode plate is disposed between the two microchannel plates, and the second electrode plate is connected to the two microchannel plates. Electrical connection; a third electrode plate is provided on the side of the first annular power transmission piece away from the microchannel plate, and the third electrode plate is electrically connected to the first annular power transmission piece; the first electrode plate and the third electrode plate are connected by an insulating column; the microchannel plate is connected to an anode; when the high-voltage power supply is in a conductive state, it transmits high-voltage electricity to the first annular power transmission piece and the second annular power transmission piece through the first electrode plate, the second electrode plate and the third electrode plate, so that the high-voltage electricity is applied to the surface of the microchannel plate, thereby forming an electric field inside the microchannel plate; and when the anode receives the electrical signal generated by ions in the mass spectrometer, the electrical signal accelerates under the action of the electric field and collides with the inner wall of the microchannel plate, generating secondary electron emission, so as to multiply the electrical signal.

[0030] This application connects to the end of the mass spectrometer via a supporting structure, enabling the device to work seamlessly with the spectrometer. Utilizing multiple electrodes, a ring-shaped power transmission plate, and a microchannel plate, it stably and orderly transmits high-voltage electricity to the microchannel plate while the high-voltage power supply is conducting, creating an electric field within the microchannel plate and ensuring the reliability of the entire power transmission process. Furthermore, when the anode receives the electrical signal generated by ions from the mass spectrometer, under the influence of the established electric field, the signal is accelerated and collides with the inner wall of the microchannel plate, generating secondary electron emission. This amplifies the electrical signal, facilitating the amplification and enhancement of weak electrical signals, improving the accuracy and identifiability of the mass spectrometer's detection data, and enabling more precise subsequent analysis and research. Attached Figure Description

[0031] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0032] Figure 1 This is an exploded view of a dual-microchannel plate annular power transmission clamping device.

[0033] Figure 2 This is a cross-sectional view of a dual-microchannel plate annular power transmission clamping device.

[0034] Figure 3 This is a schematic diagram of the overall structure of the dual microchannel plate ring power transmission clamping device.

[0035] Figure 4 This is a schematic diagram of a voltage regulation circuit.

[0036] The following are the labeling elements in the diagram: 1. First annular transmission plate; 2. Microchannel plate; 3. Second annular transmission plate; 4. First electrode plate; 5. Second electrode plate; 6. Third electrode plate; 7. Anode; 8. Insulating column; 9. Support base; 10. Support rod; 11. Limiting ring; 12. Protective shell; 13. Fixing plate; 14. Clamping component; 15. Insulating gasket; 16. First transmission column; 17. Second transmission column; 18. Third transmission column; 19. Fixing column. Detailed Implementation

[0037] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] To make the dual-microchannel plate annular power transmission clamping device provided in this application embodiment clearer and easier to understand, the device is described below with reference to the accompanying drawings. Figure 1 As shown, this figure is an exploded view of the dual microchannel plate annular power transmission clamping device provided in an embodiment of this application. The device includes:

[0040] The support structure has a support end and a connecting end, the connecting end of which is connected to the end of the mass spectrometer;

[0041] A power transmission structure is mounted on a support end. The power transmission structure includes: a power transmission body with an mounting groove containing a first annular power transmission plate 1, at least two microchannel plates 2 connected in series, and a second annular power transmission plate 3, with the first annular power transmission plate 1 positioned close to the support end; a first electrode plate 4 is located on the side of the power transmission body away from the support end, and the first electrode plate 4 and the second annular power transmission plate 3 are electrically connected to a high-voltage power supply; a second electrode plate 5 is located between the two microchannel plates 2, and the second electrode plate 5 is electrically connected to the two microchannel plates 2; a third electrode plate 6 is located on the side of the first annular power transmission plate 1 away from the microchannel plates 2, and the third electrode plate 6 is electrically connected to the first annular power transmission plate 1; the first electrode plate 4 and the third electrode plate 6 are connected by an insulating post 8; and an anode 7 is connected to the microchannel plate 2.

[0042] When the high-voltage power supply is in a conductive state, it transmits high-voltage electricity to the first annular transmission plate 1 and the second annular transmission plate 3 through the first electrode plate 4, the second electrode plate 5 and the third electrode plate 6, so that the high-voltage electricity is applied to the surface of the microchannel plate 2, thereby forming an electric field inside the microchannel plate 2; and when the anode 7 receives the electrical signal generated by ions in the mass spectrometer, the electrical signal accelerates under the action of the electric field and collides with the inner wall of the microchannel plate 2, generating secondary electron emission, so as to multiply the electrical signal.

[0043] It should be noted that the support structure has a support end and a connection end. The connection end is used to connect to the end of the mass spectrometer. Here, the type of mass spectrometer is, for example, a time-of-flight mass spectrometer, whose flight tube end can be connected to the connection end. The support end is used to connect to the power transmission structure and provides stable support for the power transmission structure.

[0044] The power transmission body has an installation slot with sufficient space to accommodate components such as the first annular power transmission piece 1, the microchannel plate 2, the second annular power transmission piece 3, the first electrode plate 4, the second electrode plate 5, the third electrode plate 6, the anode 7, and the insulating column 8, allowing these components to work together to achieve power transmission and electrical signal processing functions. The first annular power transmission piece 1 is positioned relatively close to the support end of the supporting structure. Both the first and second annular power transmission pieces 1 and 3 are annular in shape and are in contact with their adjacent microchannel plates 2 and electrode plates to ensure even stress distribution on the microchannel plates 2 during installation and to prevent damage. The first electrode plate 4 is located on the side of the power transmission body furthest from the support end and is electrically connected to the second annular power transmission piece 3 and the high-voltage power supply. The first electrode plate 4 is used to transmit the high-voltage electricity generated by the high-voltage power supply. The second electrode plate 5 is positioned between the two microchannel plates 2 and is electrically connected to them, serving as a conductor between the microchannel plates 2. The third electrode plate 6 is located on the side of the first annular transmission plate 1 away from the microchannel plate 2 and is electrically connected to the first annular transmission plate 1. The third electrode plate 6 is used to transfer the high voltage transmitted by the first annular transmission plate 1 to the microchannel plate 2. An insulating post 8 is disposed between the first electrode plate 4 and the third electrode plate 6 to provide insulation and prevent short circuits between them. The anode 7 is connected to the microchannel plate 2 and is used to receive the electrical signals generated by ions in the mass spectrometer. Here, the anode 7 adopts a Faraday cup design.

[0045] When the high-voltage power supply is in a conductive state, the high-voltage electricity is transmitted through the link of the first electrode plate 4, the second electrode plate 5, and the third electrode plate 6 to the first annular transmission plate 1 and the second annular transmission plate 3, respectively. Since these electrodes and plates are connected to the microchannel plate 2, the high-voltage electricity can be applied to the surface of the microchannel plate 2, thereby forming an electric field inside the microchannel plate 2. Furthermore, when the anode 7 receives the electrical signal generated by ions in the mass spectrometer, the electrical signal will accelerate under the influence of the electric field inside the microchannel plate 2. During the acceleration process, the electrical signal will collide with the inner wall of the microchannel plate 2, and this collision will produce a secondary electron emission phenomenon. With the help of secondary electron emission, the electrical signal will achieve a multiplication effect, thereby achieving the purpose of amplification and enhancement of the electrical signal, which will help in the more effective detection and analysis of relevant data of the mass spectrometer.

[0046] Furthermore, such as Figure 1 and Figure 2 As shown, the supporting components include:

[0047] The support base 9 has a connecting end at one end and at least three evenly distributed support rods 10 at the other end; the end of the support rod 10 away from the support base 9 forms a support end.

[0048] It should be noted that one end of the support base 9 forms a connecting end for connecting to the end of the mass spectrometer, thereby fixing the entire device on the mass spectrometer and providing a stable installation. The other end of the support base 9 is provided with at least three evenly distributed support rods 10, which can make the support structure more evenly stressed, providing a stable and reliable support foundation for the aforementioned power transmission structure, avoiding problems such as device tilting and shaking caused by uneven stress, and ensuring the stability of the entire device during operation.

[0049] Furthermore, the main power transmission structure includes:

[0050] The limiting ring 11 is covered with a protective outer shell 12; the limiting ring 11 has an installation groove; the limiting ring 11 is connected to the support rod 10;

[0051] The fixing plate 13 is located on the side of the limiting ring 11 near the support structure and is used to install the anode 7.

[0052] It should be noted that the limiting ring 11 fixes the positions of components such as the first annular transmission plate 1, the microchannel plate 2, the second annular transmission plate 3, the first electrode plate 4, the second electrode plate 5, the third electrode plate 6, the anode 7, and the insulating column 8, ensuring the structural stability of the entire power transmission body. The fixing plate 13 is located on the side of the limiting ring 11 near the supporting structure, and it plays an auxiliary role in fixing the anode 7. Here, the material of the protective shell 12 is, for example, polyetheretherketone (PEEK) resin, which can effectively resist the impact of possible external collisions, compression, and other external forces, protecting the internal power transmission components and other critical components from damage.

[0053] In addition, such as Figure 1 and Figure 3 As shown, the protective shell 12 has two stacked clamping members 14 at the end away from the support rod 10. The clamping members 14 are annular in shape and have a grid at their center.

[0054] The clamping component 14 is used to fix the grid to the end of the protective shell 12, specifically at the front end of the ion entry microchannel plate 2, which is the end of the time-of-flight mass spectrometer's flight tube. The grid is a metal mesh with extremely small pores. Since ions need to pass through multiple electrodes to reach the detector, a hole needs to be made in the center of the electrode plate, and the hole size should be as large as possible to ensure that a sufficient number of ions can enter the detector normally. However, the microchannel plate 2 requires high voltage to operate normally, and this high voltage will radiate outward through the opening in the electrode plate, affecting the flight of ions within the time-of-flight mass spectrometer's flight tube and reducing the instrument's resolution, sensitivity, and other performance indicators. By adding a grid at the center opening of the electrode plate, the electric field distortion in the field-free region caused by the high voltage is shielded, and the ions can pass smoothly through the electrode plate, improving the performance of the mass spectrometer. Here, the clamping component 14 can be connected to the protective shell 12 via the fixing post 19.

[0055] Furthermore, an insulating gasket 15 is provided between the fixed plate 13 and the third electrode plate 6. Here, the insulating gasket 15 is used to separate the third electrode plate 16 from the adjacent ground wire, thereby providing insulation to prevent electrical faults such as short circuits, ensuring that each electrode plate transmits high-voltage electricity and constructs the electric field according to design requirements, and ensuring the normal operation and safety of the entire device's electrical system.

[0056] Furthermore, the anode 7 is connected to the microchannel plate 2 via the first power transmission post 16; the third electrode plate 6 is connected to the first annular power transmission piece 1 via the second power transmission post 17; and the first electrode plate 4 is connected to the third electrode plate 6 via the third power transmission post 18.

[0057] The first transmission column 16 is used to stably transmit the electrical signal received by the anode 7 from the mass spectrometer ions to the microchannel plate 2; the second transmission column 17 is used to transmit the high voltage from the high voltage power supply to the first annular transmission plate 1; and the third transmission column 18 is used to transmit the high voltage from the high voltage power supply to the third electrode plate 6.

[0058] Furthermore, such as Figure 4 As shown, it also includes: a voltage adjustment circuit;

[0059] The voltage regulation circuit includes:

[0060] The first voltage regulating circuit has one end connected to the high voltage power supply and the other end connected to one end of the second voltage regulating circuit.

[0061] The current-limiting resistor R5 is connected at one end to the free end of the second voltage regulator circuit, and at the other end to the first end and anode 7 of the DC blocking capacitor C1; the second end of the DC blocking capacitor C1 is connected to the first end of the sampling resistor R6 and the input terminal of the amplifier A1; the second end of the sampling resistor R6 is grounded.

[0062] The first equivalent resistor Rm1 and the second equivalent resistor Rm2 are connected in parallel with the first voltage regulating circuit; the resistance values ​​of the first equivalent resistor Rm1 and the second equivalent resistor Rm2 correspond one-to-one with the resistance values ​​of the two microchannel plates 2.

[0063] It should be noted that the voltage adjustment circuit includes at least a first voltage regulation circuit, a second voltage regulation circuit, a current limiting resistor R5, a DC blocking capacitor C1, a sampling resistor R6, an amplifier A1, a first equivalent resistor Rm1, and a second equivalent resistor Rm2; its function is to adjust and process the voltage output from the high-voltage power supply to meet the working requirements of components such as the microchannel plate in the dual microchannel plate ring power transmission clamping device, and to realize the processing and control of related electrical signals.

[0064] Specifically, the first voltage regulating circuit includes:

[0065] A first-stage voltage divider resistor R1 and a second-stage voltage divider resistor R2 are connected. The first end of the first-stage voltage divider resistor R1 is connected to the high-voltage power supply, and the second end of the first-stage voltage divider resistor R1 is connected to the first end of the second-stage voltage divider resistor R2.

[0066] The second voltage regulation circuit includes:

[0067] The anode voltage divider resistor R3 and the voltage regulating resistor R4 are connected. The first end of the anode voltage divider resistor R3 is connected to the second end of the secondary voltage divider resistor R2. The second end of the anode voltage divider resistor R3 is connected to the first end of the voltage regulating resistor R4. The second end of the voltage regulating resistor R4 is connected to the high voltage power supply.

[0068] The high voltage output from the high-voltage power supply is initially divided by the first-stage voltage divider resistor R1 and the second-stage voltage divider resistor R2, which are connected in series. This adjusts the voltage to a range suitable for subsequent circuit processing, providing a basic voltage division setting for the entire voltage regulation circuit. Based on the voltage division of the first voltage regulation circuit, the voltage is further adjusted and finely regulated using the anode voltage divider resistor R3 and the voltage adjustment resistor R4 to ensure that the voltage output to the anode 7 and the entire device can meet the actual working requirements. The output voltage can also be flexibly changed by adjusting the voltage adjustment resistor R4.

[0069] The current-limiting resistor R5 limits the current in the circuit to prevent excessive current from damaging components and ensures stable and safe operation. The DC-blocking capacitor C1 isolates the DC component, allowing only AC signals to pass through. This prevents DC components from affecting subsequent circuits, enabling the circuit to process AC signals more accurately. The sampling resistor R6 samples the signal after passing through the DC-blocking capacitor C1, converting the current signal into a voltage signal for amplification and processing by amplifier A1. Amplifier A1 amplifies the weak sampled signal, making it easier to detect and utilize, facilitating signal monitoring and analysis within the circuit.

[0070] The first equivalent resistor Rm1 and the second equivalent resistor Rm2 are used to simulate the resistance characteristics of the microchannel board 2, so as to more accurately analyze and adjust the circuit parameters during the circuit design and debugging process, and ensure that the entire circuit and the microchannel board 2 are in the best state of cooperation, thereby realizing precise control and stable power supply of the microchannel board 2.

[0071] Here, the high-voltage power supply can be either a positive or negative power supply, with a value of ±3kV for example. The first-stage voltage divider resistor R1 is, for example, 5MΩ, the second-stage voltage divider resistor R2 is, for example, 5MΩ, the anode voltage divider resistor R3 is, for example, 5MΩ (adjustable), the voltage regulating resistor R4 is, for example, 5MΩ (adjustable), the current limiting resistor R5 is, for example, 500kΩ, the sampling point resistor R6 is, for example, 50Ω, and the DC blocking capacitor C1 is, for example, 10nF.

[0072] This application also provides a mass spectrometer, including: the aforementioned dual microchannel plate annular power transmission clamping device. The mass spectrometer possesses the functions and advantages of the dual microchannel plate annular power transmission clamping device, which will not be elaborated here.

[0073] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A dual-microchannel plate annular power transmission clamping device, characterized in that, include: A support structure having a support end and a connecting end, the connecting end being connected to the end of the mass spectrometer; A power transmission structure is provided on the support end; the power transmission structure includes: a power transmission body, the power transmission body having an installation groove, in which a first annular power transmission piece (1), at least two microchannel plates (2) connected in series and a second annular power transmission piece (3) are arranged in sequence, and the first annular power transmission piece (1) is arranged close to the support end; a first electrode plate (4) is provided on the side of the power transmission body away from the support end, and the first electrode plate (4) and the second annular power transmission piece (3) are electrically connected to a high voltage power supply; a second electrode plate (5) is provided between the two microchannel plates (2), and the second electrode plate (5) is electrically connected to the two microchannel plates (2); a third electrode plate (6) is provided on the side of the first annular power transmission piece (1) away from the microchannel plate (2), and the third electrode plate (6) is electrically connected to the first annular power transmission piece (1); the first electrode plate (4) and the third electrode plate (6) are connected by an insulating column (8); an anode (7) is connected to the microchannel plate (2); When the high-voltage power supply is in a conductive state, it transmits high-voltage electricity to the first annular power transmission plate (1) and the second annular power transmission plate (3) through the first electrode plate (4), the second electrode plate (5) and the third electrode plate (6), so that the high-voltage electricity is applied to the surface of the microchannel plate (2), thereby forming an electric field inside the microchannel plate (2); and when the anode (7) receives the electrical signal generated by the ions in the mass spectrometer, the electrical signal accelerates under the action of the electric field and collides with the inner wall of the microchannel plate (2), generating secondary electron emission, so as to multiply the electrical signal.

2. The dual-microchannel plate annular power transmission clamping device according to claim 1, characterized in that, The supporting structure includes: A support base (9) is provided at one end to form the connecting end, and at the other end there are at least three evenly distributed support rods (10); the end of the support rod (10) away from the support base (9) forms the support end.

3. The dual-microchannel plate annular power transmission clamping device according to claim 2, characterized in that, The power transmission main body includes: A limiting ring (11) is provided with a protective outer shell (12); the limiting ring (11) is provided with the mounting groove; the limiting ring (11) is connected to the support rod (10); A fixing plate (13) is disposed on the side of the limiting ring (11) near the support structure for mounting the anode (7).

4. The dual-microchannel plate annular power transmission clamping device according to claim 3, characterized in that, The protective shell (12) has two stacked clamping members (14) at one end away from the support rod (10). The clamping members (14) are annular in shape and have a grid at their center.

5. The dual-microchannel plate annular power transmission clamping device according to claim 3, characterized in that, An insulating gasket (15) is provided between the fixing plate (13) and the third electrode plate (6).

6. The dual-microchannel plate annular power transmission clamping device according to claim 3, characterized in that, The protective shell (12) is made of polyetheretherketone resin.

7. The dual-microchannel plate annular power transmission clamping device according to claim 1, characterized in that, The anode (7) is connected to the microchannel plate (2) through the first power transmission column (16); the third electrode plate (6) is connected to the first annular power transmission piece (1) through the second power transmission column (17); the first electrode plate (4) is connected to the third electrode plate (6) through the third power transmission column (18).

8. The dual-microchannel plate annular power transmission clamping device according to claim 1, characterized in that, Also includes: Voltage regulation circuit; The voltage adjustment circuit includes: A first voltage regulating circuit, one end of which is connected to the high voltage power supply, and the other end of which is connected to one end of a second voltage regulating circuit. A current-limiting resistor R5 is connected at one end to the free end of the second voltage regulating circuit, and at the other end to the first end of the DC blocking capacitor C1 and the anode (7); the second end of the DC blocking capacitor C1 is connected to the first end of the sampling resistor R6 and the input end of the amplifier A1; the second end of the sampling resistor R6 is grounded. The first equivalent resistor Rm1 and the second equivalent resistor Rm2 are connected in parallel with the first voltage regulating circuit; the resistance values ​​of the first equivalent resistor Rm1 and the second equivalent resistor Rm2 are equal to the resistance values ​​of the two microchannel plates (2).

9. The dual-microchannel plate annular power transmission clamping device according to claim 8, characterized in that, The first voltage regulating circuit includes: A first-stage voltage divider resistor R1 and a second-stage voltage divider resistor R2 are provided. The first end of the first-stage voltage divider resistor R1 is connected to the high-voltage power supply, and the second end of the first-stage voltage divider resistor R1 is connected to the first end of the second-stage voltage divider resistor R2. The second voltage regulating circuit includes: An anode voltage divider resistor R3 and a voltage regulating resistor R4 are provided. The first end of the anode voltage divider resistor R3 is connected to the second end of the secondary voltage divider resistor R2. The second end of the anode voltage divider resistor R3 is connected to the first end of the voltage regulating resistor R4. The second end of the voltage regulating resistor R4 is connected to the high-voltage power supply.

10. A mass spectrometer, characterized in that, include: A dual-microchannel plate annular power transmission clamping device according to any one of claims 1-9.

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