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

Abstract

The invention 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] The present application generally relates to the field of photoelectric detection technology, and specifically relates to a double microchannel plate annular power transmission clamping device and a mass spectrometer. Background Art

[0002] Microchannel Plate (MCP) is a planar component used for the detection of particles (including electrons, ions and neutrons, which can be collectively referred to as ions) in, for example, a mass spectrometer (MS) device. Currently, MCPs can be installed in mass spectrometers by a fixed structure that can hold the MCP in place and keep the MCP in the path of the ions.

[0003] The existing fixing structure is only suitable for the installation and protection of a single microchannel plate, and cannot be applied to two or more microchannel plates, resulting in a small gain, being unsuitable for time-of-flight mass spectrometer applications and affecting ion flight. Summary of the invention

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

[0005] In a first aspect, the present application provides a double microchannel plate annular power transmission clamping device, comprising: A supporting structure, the supporting structure having a supporting end and a connecting end, the connecting end being connected to a terminal of the mass spectrometer; A power transmission structure, the power transmission structure is arranged on the support end; the power transmission structure comprises: a power transmission body, the power transmission body has a mounting groove, in which a first annular power transmission sheet, at least two microchannel plates connected in series and a second annular power transmission sheet are arranged in sequence, and the first annular power transmission sheet is arranged close to the support end; a first electrode plate is arranged 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 sheet and a high-voltage power supply; a second electrode plate is arranged between the two microchannel plates, and the second electrode plate is electrically connected to the two microchannel plates; a third electrode plate is arranged on the side of the first annular power transmission sheet away from the microchannel plate, and the third electrode plate is electrically connected to the first annular power transmission sheet; 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 sheet and the second annular power transmission sheet 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 electric signal generated by the ions in the mass spectrometer, the electric signal is accelerated 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 electric signal.

[0006] According to the technical solution provided in the embodiment of the present application, the support assembly includes: 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; an end of the support rod away from the support base forms the support end.

[0007] According to the technical solution provided in the embodiment of the present application, the power transmission subject includes: A limiting ring, wherein a protective shell is disposed on the outer cover of the limiting ring; the mounting groove is provided on the limiting ring; and the limiting ring is connected to the supporting rod; A fixing plate is arranged on a side of the limiting ring close to the supporting structure and is used for mounting the anode.

[0008] According to the technical solution provided in the embodiment of the present application, two stacked clamping members are provided at one end of the protective shell away from the support rod, the clamping members are annular in shape, and a grid is provided at the center thereof.

[0009] According to the technical solution provided in the embodiment of the present application, an insulating gasket is provided between the fixed plate and the third electrode plate.

[0010] According to the technical solution provided in the embodiment of the present application, the material of the protective shell is polyetheretherketone resin.

[0011] According to the technical solution provided in the embodiment of the present application, the anode is connected to the microchannel plate through a first transmission pole; the third electrode plate is connected to the first annular transmission plate through a second transmission pole; and the first electrode plate is connected to the third electrode plate through a third transmission pole.

[0012] The technical solution provided in the embodiment of the present application also includes: a voltage adjustment circuit; The voltage adjustment circuit comprises: a first voltage regulating circuit, wherein one end of the first voltage regulating circuit is connected to the high voltage power supply, and the other end of the first voltage regulating circuit is connected to one end of the second voltage regulating circuit; A current limiting resistor R5, one end of which is connected to the free end of the second voltage regulating circuit, and the other end of which is connected to the first end of the DC blocking capacitor C1 and the anode; 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; A first equivalent resistor Rm1 and a second equivalent resistor Rm2, wherein the first equivalent resistor Rm1 and the second equivalent resistor Rm2 are arranged in parallel with the first voltage regulating circuit; the resistance value of the first equivalent resistor Rm1 and the resistance value of the second equivalent resistor Rm2 are equal to the resistance values ​​of the two microchannel plates in a one-to-one correspondence.

[0013] According to the technical solution provided in the embodiment of the present application, the first voltage regulating circuit includes: A primary voltage-dividing resistor R1 and a secondary voltage-dividing resistor R2, wherein a first end of the primary voltage-dividing resistor R1 is connected to the high voltage power supply, and a second end of the primary voltage-dividing resistor R1 is connected to a first end of the secondary voltage-dividing resistor R2; The second voltage regulating circuit comprises: An anode voltage-dividing resistor R3 and a voltage-regulating resistor R4, wherein the first end of the anode voltage-dividing resistor R3 is connected to the first end of the anode voltage-dividing resistor R3 and the second end of the secondary voltage-dividing resistor R2, the second end of the anode voltage-dividing resistor R3 is connected to the first end of the voltage-regulating resistor R4, and the second end of the voltage-regulating resistor R4 is connected to the high-voltage power supply.

[0014] In a second aspect, the present application provides a mass spectrometer, characterized in that it includes: the above-mentioned double microchannel plate annular power transmission clamping device.

[0015] It can be seen from the above technical solution that the present application has at least the following beneficial effects: The present application provides a double microchannel plate annular power transmission clamping device, comprising: a support structure, which has a support end and a connection end, and the connection end is connected to the end of a mass spectrometer; and also comprises a power transmission structure, which is arranged on the support end; the power transmission structure comprises: a power transmission body, the power transmission body has an installation groove, and a first annular power transmission sheet, at least two microchannel plates connected in series and a second annular power transmission sheet are arranged in sequence, and the first annular power transmission sheet is arranged close to the support end; a first electrode plate is arranged 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 sheet and a high-voltage power supply; a second electrode plate is arranged between the two microchannel plates, and the second electrode plate is connected to the two microchannel plates The microchannel plate is electrically connected; a third electrode plate is provided on a side of the first annular power transmission sheet away from the microchannel plate, and the third electrode plate is electrically connected to the first annular power transmission sheet; 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 sheet and the second annular power transmission sheet 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 the ions in the mass spectrometer, the electrical signal is accelerated under the action of the electric field and collides with the inner wall of the microchannel plate, generating secondary electron emission to multiply the electrical signal.

[0016] The present application connects the connecting end of the supporting structure to the end of the mass spectrometer, so that the device can be well used with the mass spectrometer; and by using multiple plates, annular transmission plates and microchannel plates in combination, when the high-voltage power supply is conducting, the high-voltage electricity can be stably and orderly transmitted to the microchannel plate and an electric field can be formed inside the microchannel plate, ensuring the reliability of the entire transmission process. In addition, when the anode receives the electrical signal generated by the ions in the mass spectrometer, under the action of the formed electric field, the electrical signal is accelerated and collides with the inner wall of the microchannel plate to generate secondary electron emission, and finally the electrical signal is multiplied, which is conducive to amplifying and enhancing weak electrical signals, improving the accuracy and recognizability of mass spectrometer-related detection data, and facilitating more accurate subsequent analysis and research. BRIEF DESCRIPTION OF THE DRAWINGS Other features, objects and advantages of the present application will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings.

[0017] Figure 1 An exploded view of the double microchannel plate annular power transmission clamping device.

[0018] Figure 2 It is a cross-sectional view of a double microchannel plate annular power transmission clamping device.

[0019] Figure 3 It is a schematic diagram of the overall structure of the double microchannel plate annular power transmission clamping device.

[0020] Figure 4 Schematic diagram of the voltage regulation circuit.

[0021] Numbers in the figure: 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. limit ring; 12. protective shell; 13. fixing plate; 14. pressing piece; 15. insulating gasket; 16. first transmission column; 17. second transmission column; 18. third transmission column; 19. fixing column. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] In order to make the dual microchannel plate annular power transmission clamping device provided in the embodiment of the present application clearer and easier to understand, the device is introduced below in conjunction with the accompanying drawings. Figure 1 As shown, this figure is an exploded view of a double microchannel plate annular power transmission clamping device provided in an embodiment of the present application, and the device includes: A supporting structure, the supporting structure having a supporting end and a connecting end, the connecting end being connected to a terminal end of the mass spectrometer; A power transmission structure, the power transmission structure is arranged on the support end; the power transmission structure comprises: a power transmission body, the power transmission body has a mounting groove, in which a first annular power transmission sheet 1, at least two microchannel plates 2 connected in series and a second annular power transmission sheet 3 are arranged in sequence, and the first annular power transmission sheet 1 is arranged close to the support end; a first electrode plate 4 is arranged on the side of the power transmission body away from the support end, and the first electrode plate 4 is electrically connected to the second annular power transmission sheet 3 and a high-voltage power supply; a second electrode plate 5 is arranged 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 arranged on the side of the first annular power transmission sheet 1 away from the microchannel plate 2, and the third electrode plate 6 is electrically connected to the first annular power transmission sheet 1; the first electrode plate 4 and the third electrode plate 6 are connected by an insulating column 8; the microchannel plate 2 is connected to an anode 7; When the high-voltage power supply is in a conductive state, it transmits the high-voltage electricity to the first annular power transmission sheet 1 and the second annular power transmission sheet 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 electric signal generated by the ions in the mass spectrometer, the electric signal is accelerated under the action of the electric field and collides with the inner wall of the microchannel plate 2, generating secondary electron emission to multiply the electric signal.

[0025] It should be noted that the support structure has a supporting end and a connecting end, wherein the connecting end is used to connect to the end of the mass spectrometer. Here, the type of the mass spectrometer is, for example, a time-of-flight mass spectrometer, and the end of its flight tube can be connected to the connecting end; the supporting end is used to connect to the power transmission structure to provide stable support for the power transmission structure.

[0026] The power transmission body is provided with an installation groove, which has a space for accommodating, and is used to sequentially place the first annular power transmission sheet 1, the microchannel plate 2, the second annular power transmission sheet 3, the first electrode plate 4, the second electrode plate 5, the third electrode plate 6, the anode 7 and the insulating column 8 and other components, so that each component cooperates with each other to realize the power transmission and electrical signal processing functions. In addition, the first annular power transmission sheet 1 is arranged relatively close to the support end of the support structure, and the first annular power transmission sheet 1 and the second annular power transmission sheet 3 are both annular in shape, and are in contact with the adjacent microchannel plate 2, the electrode plate and other surfaces, so as to ensure that the microchannel plate 2 is evenly stressed during the installation process and is not easily damaged. The first electrode plate 4 is located on the side of the power transmission body away from the support end, and is electrically connected to the second annular power transmission sheet 3 and the high-voltage power supply. The first electrode plate 4 is used to transmit the high voltage generated by the high-voltage power supply. The second electrode plate 5 is arranged between the two microchannel plates 2, and is electrically connected to the two microchannel plates 2. The second electrode plate 5 plays a conductive role between the microchannel plates 2. The third electrode plate 6 is located on the side of the first annular power transmission sheet 1 away from the microchannel plate 2 and is electrically connected to the first annular power transmission sheet 1. The third electrode plate 6 is used to transfer the high voltage electricity transmitted by the first annular power transmission sheet 1 to the microchannel plate 2. The insulating column 8 is arranged between the first electrode plate 4 and the third electrode plate 6 to play an insulating role and avoid a short circuit problem between the first electrode plate 4 and the third electrode plate 6. The anode 7 is connected to the microchannel plate 2 and is used to receive the electrical signal generated by the ions in the mass spectrometer. Here, the anode 7 adopts a Faraday cup design.

[0027] When the high-voltage power supply is in a conductive state, the high-voltage electricity will be transmitted to the first annular power transmission sheet 1 and the second annular power transmission sheet 3 respectively through the link of the first electrode plate 4, the second electrode plate 5 and the third electrode plate 6; since these electrodes and the electric sheet 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. In addition, when the anode 7 receives the electric signal generated by the ions in the mass spectrometer, the electric signal will accelerate under the action of the internal electric field of the microchannel plate 2 that has been formed; during the acceleration process, the electric signal will collide with the inner wall of the microchannel plate 2, and this collision will produce secondary electron emission. With the help of secondary electron emission, the electric signal can achieve a multiplication effect, thereby achieving the purpose of amplifying and enhancing the electric signal, which is helpful for subsequent more effective detection and analysis of mass spectrometer-related data.

[0028] Furthermore, if Figure 1 and Figure 2 As shown, the support assembly includes: A support base 9, one end of the support base 9 forms a connecting end, and the other end thereof is provided with at least three evenly distributed support rods 10; an end of the support rod 10 away from the support base 9 forms a supporting end.

[0029] It should be noted that one end of the support base 9 forms a connection end for connecting to the end of the mass spectrometer, thereby fixing the entire device on the mass spectrometer to ensure 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 balanced in force, provide a stable and reliable support foundation for the above-mentioned power transmission structure, avoid problems such as tilting and shaking of the device due to uneven force, and ensure the stability of the entire device during operation.

[0030] Furthermore, the power transmission entity includes: A limiting ring 11 is provided with a protective shell 12 on its outer cover; a mounting groove is provided on the limiting ring 11; the limiting ring 11 is connected to the support rod 10; The fixing plate 13 is arranged on a side of the limiting ring 11 close to the supporting structure and is used for mounting the anode 7 .

[0031] It should be noted that the limiting ring 11 has a fixing effect on the positions of the first annular power transmission sheet 1, the microchannel plate 2, the second annular power transmission sheet 3, the first electrode plate 4, the second electrode plate 5, the third electrode plate 6, the anode 7 and the insulating column 8, thereby ensuring the structural stability of the entire power transmission body. The fixing plate 13 is located on the side of the limiting ring 11 close to the supporting structure, and it plays an auxiliary fixing role for the anode 7. Here, the material of the protective shell 12 is, for example, polyetheretherketone (PEEK) resin, which can effectively resist the influence of possible external forces such as collision and extrusion, and protect the internal power transmission components and other key components from damage.

[0032] In addition, if Figure 1 and Figure 3 As shown, two stacked pressing members 14 are provided at one end of the protective housing 12 away from the support rod 10. The pressing member 14 is annular in shape, and a grid is provided at the center thereof.

[0033] Among them, the clamping member 14 is used to fix the grid at the end position of the protective shell 12, that is, at the front end of the ion flying into the microchannel plate 2, that is, the end of the flight tube of the time-of-flight mass spectrometer. The grid is a mesh with a very small aperture, and its material is metal. Since the ions need to pass through multiple electrodes to reach the detector, it is necessary to open a hole in the center of the electrode sheet, and the size of the opening should be as large as possible to ensure that enough ions can enter the detector normally, but the microchannel plate 2 requires high voltage to work normally, and its high voltage will radiate outward through the opening of the pole piece, affecting the flight of ions in the flight tube of the time-of-flight mass spectrometer, and reducing the resolution, sensitivity and other indicators of the instrument. By adding a grid at the central opening of the pole piece, the electric field distortion in the field-free zone caused by the high voltage is shielded, and it is also ensured that the ions can pass through the pole plate smoothly, thereby improving the performance of the mass spectrometer. Here, the clamping member 14 can be connected to the protective shell 12 through a fixed column 19.

[0034] Furthermore, an insulating gasket 15 is provided between the fixing plate 13 and the third electrode plate 6. Here, the insulating gasket 15 is used to separate the third electrode plate 16 from the ground wire adjacent thereto, and plays an insulating role to prevent electrical faults such as short circuits, ensure that each electrode plate transmits high voltage electricity and constructs an electric field according to design requirements, and ensure the normal operation and safety of the electrical system of the entire device.

[0035] Furthermore, the anode 7 is connected to the microchannel plate 2 via the first transmission column 16 ; the third electrode plate 6 is connected to the first annular transmission sheet 1 via the second transmission column 17 ; and the first electrode plate 4 is connected to the third electrode plate 6 via the third transmission column 18 .

[0036] Among them, the first transmission column 16 is used to stably transmit the electrical signal generated by the mass spectrometer ions received by the anode 7 to the microchannel plate 2; the second transmission column 17 is used to transmit the high voltage electricity transmitted from the high voltage power supply to the first annular transmission plate 1; the third transmission column 18 is used to transmit the high voltage electricity transmitted from the high voltage power supply to the third electrode 6.

[0037] Furthermore, if Figure 4 As shown, it also includes: a voltage adjustment circuit; The voltage regulation circuit includes: A first voltage regulating circuit, one end of the first voltage regulating circuit is connected to the high voltage power supply, and the other end of the first voltage regulating circuit is connected to one end of the second voltage regulating circuit; A current limiting resistor R5, one end of which is connected to the free end of the second voltage regulating circuit, and the other end of which is connected 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 value of the first equivalent resistor Rm1 and the resistance value of the second equivalent resistor Rm2 are equal to the resistance values ​​of the two microchannel plates 2 in a one-to-one correspondence.

[0038] It should be noted that the voltage regulation circuit at least includes 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 by the high-voltage power supply to meet the working requirements of the microchannel plate and other components in the dual microchannel plate annular power transmission clamping device, and realize the processing and control of related electrical signals.

[0039] Specifically, the first voltage regulating circuit includes: A primary voltage-dividing resistor R1 and a secondary voltage-dividing resistor R2, wherein a first end of the primary voltage-dividing resistor R1 is connected to a high voltage power supply, and a second end of the primary voltage-dividing resistor R1 is connected to a first end of the secondary voltage-dividing resistor R2; The second voltage regulating circuit comprises: The anode voltage-dividing resistor R3 and the voltage-regulating resistor R4, the first end of the anode voltage-dividing resistor R3 is connected to the first end of the anode voltage-dividing resistor R3 and the second end of the secondary voltage-dividing resistor R2, the second end of the anode voltage-dividing resistor R3 is connected to the first end of the voltage-regulating resistor R4, and the second end of the voltage-regulating resistor R4 is connected to the high-voltage power supply.

[0040] Among them, the high voltage output by the high-voltage power supply is initially divided by the first-level voltage-dividing resistor R1 and the second-level voltage-dividing resistor R2 connected in series, and the voltage is adjusted to a range suitable for subsequent circuit processing, providing a basic voltage-dividing setting for the entire voltage adjustment circuit; on the basis of the voltage division of the first voltage regulation circuit, the voltage is further adjusted and fine-tuned by using the anode voltage-dividing resistor R3 and the voltage regulating resistor R4 to ensure that the voltage output to the anode 7 and the entire device can meet the actual working requirements, and the output voltage can be flexibly changed by adjusting the voltage regulating resistor R4.

[0041] The current limiting resistor R5 is used to limit the current in the circuit to prevent excessive current from damaging the components in the circuit and ensure that the circuit can work stably and safely; the DC blocking capacitor C1 is used to isolate the DC component and only allow the AC signal to pass through, which can avoid the DC component from affecting the subsequent circuit and enable the circuit to process the AC signal more accurately. The sampling resistor R6 samples the signal after passing through the DC blocking capacitor C1 and converts the current signal into a voltage signal so that the amplifier A1 can amplify and process it. The amplifier A1 amplifies the weak signal obtained by sampling so that it can be better detected and used, which is convenient for monitoring and analyzing the signal in the circuit.

[0042] The first equivalent resistor Rm1 and the second equivalent resistor Rm2 are used to simulate the resistance characteristics of the microchannel plate 2, so as to more accurately analyze and adjust the circuit parameters during the circuit design and debugging process, ensure that the entire circuit and the microchannel plate 2 are in the best state, thereby achieving precise control of the microchannel plate 2 and stable power supply.

[0043] Here, the high voltage power supply can be a positive power supply or a negative power supply, and its value is, for example, ±3kV, the first-level voltage-dividing resistor R1 is, for example, 5MΩ, the second-level voltage-dividing resistor R2 is, for example, 5MΩ, the anode voltage-dividing 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 rent R6 is, for example, 50Ω, and the DC blocking capacitor C1 is, for example, 10nF.

[0044] The present application also provides a mass spectrometer, including: the above-mentioned double microchannel plate annular power transmission clamping device. The mass spectrometer has the functions and advantages of the double microchannel plate annular power transmission clamping device, which will not be described in detail here.

[0045] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A double microchannel plate annular power transmission clamping device, characterized in that: include: A supporting structure, the supporting structure having a supporting end and a connecting end, the connecting end being connected to a terminal of the mass spectrometer; A power transmission structure, the power transmission structure being arranged on the support end; the power transmission structure comprising: a power transmission body, the power transmission body having an installation groove, in which a first annular power transmission sheet (1), at least two microchannel plates (2) connected in series and a second annular power transmission sheet (3) are arranged in sequence, and the first annular power transmission sheet (1) is arranged close to the support end; a first electrode plate (4) is arranged on a side of the power transmission body away from the support end, and the first electrode plate (4) and the second annular power transmission sheet (3) and a high-voltage power supply are electrically connected; a second electrode plate (5) is arranged 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 arranged on a side of the first annular power transmission sheet (1) away from the microchannel plate (2), and the third electrode plate (6) is electrically connected to the first annular power transmission sheet (1); the first electrode plate (4) and the third electrode plate (6) are connected via an insulating column (8); the microchannel plate (2) is connected to an anode (7); When the high-voltage power source is in a conductive state, it transmits high-voltage electricity to the first annular power transmission sheet (1) and the second annular power transmission sheet (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 electric signal generated by the ions in the mass spectrometer, the electric signal is accelerated under the action of the electric field and collides with the inner wall of the microchannel plate (2), generating secondary electron emission, so that the electric signal is multiplied.

2. A double microchannel plate annular power transmission clamping device according to claim 1, characterized in that: The support assembly comprises: A support base (9), wherein one end of the support base (9) forms the connection end, and the other end is provided with at least three evenly distributed support rods (10); an end of the support rod (10) away from the support base (9) forms the support end.

3. A double microchannel plate annular power transmission clamping device according to claim 2, characterized in that: The power transmission subject comprises: A limiting ring (11), wherein the limiting ring (11) is provided with a protective shell (12) on its outer cover; the limiting ring (11) is provided with the mounting groove; the limiting ring (11) is connected to the supporting rod (10); A fixing plate (13), the fixing plate (13) being arranged on a side of the limiting ring (11) close to the supporting structure and used for mounting the anode (7).

4. A double microchannel plate annular power transmission clamping device according to claim 3, characterized in that: Two stacked pressing members (14) are provided at one end of the protective housing (12) away from the support rod (10); the pressing members (14) are annular in shape, and a grid is provided at the center thereof.

5. The double 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 pole plate (6).

6. The double microchannel plate annular power transmission clamping device according to claim 3, characterized in that: The material of the protective shell (12) is polyetheretherketone resin.

7. The double microchannel plate annular power transmission clamping device according to claim 1, characterized in that: The anode (7) is connected to the microchannel plate (2) via a first transmission pole (16); the third pole plate (6) is connected to the first annular transmission plate (1) via a second transmission pole (17); and the first pole plate (4) is connected to the third pole plate (6) via a third transmission pole (18).

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

9. The double microchannel plate annular power transmission clamping device according to claim 8, characterized in that: The first voltage regulating circuit comprises: A primary voltage-dividing resistor R1 and a secondary voltage-dividing resistor R2, wherein a first end of the primary voltage-dividing resistor R1 is connected to the high voltage power supply, and a second end of the primary voltage-dividing resistor R1 is connected to a first end of the secondary voltage-dividing resistor R2; The second voltage regulating circuit comprises: An anode voltage-dividing resistor R3 and a voltage-regulating resistor R4, wherein the first end of the anode voltage-dividing resistor R3 is connected to the first end of the anode voltage-dividing resistor R3 and the second end of the secondary voltage-dividing resistor R2, the second end of the anode voltage-dividing resistor R3 is connected to the first end of the voltage-regulating resistor R4, and 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 double microchannel plate annular power transmission clamping device as described in any one of claims 1 to 9.

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