Ion source repulsion equipment

Abstract

The utility model discloses ion source repulsion equipment, relates to the technical field of instrument analysis, overcomes the defect that in the prior art, the number of ionized samples entering an instrument is small, and adopts the technical scheme that the ion source repulsion equipment is mainly used for solving the problem. The ionization source spray pipe is used for spraying out ionized samples, the air curtain disc is used for receiving the ionized samples, the repulsion electrode is used for pushing the ionized samples to the air curtain disc, and the ionized samples sprayed out by the ionization source spray pipe form a spraying path. The repulsion electrode is provided with a plurality of electrode faces which are continuously or intermittently arranged in the circumferential direction with the axis o as the center line, the axis o is any straight line parallel to the axis of the spraying path from the circle center of the air curtain disc to the axis of the spraying path, and each electrode face is correspondingly provided with an independently-adjusted coil used for generating a magnetic field. And the ionized sample is pushed to the inlet of the air curtain plate through the magnetic field. The utility model is mainly used for increasing the quantity of ionized samples entering the instrument.

Description

Technical Field

[0001] The utility model relates to the technical field of instrumental analysis, in particular to an ion source repulsion device. Background Art

[0002] The application of surface acoustic wave technology to a mass spectrometry ionization source can realize the detection of trace substances in complex matrix liquid samples without sample pretreatment, which is a new technology for liquid sample detection. It can be used for the highly sensitive detection of non-polar compounds or certain polar compounds, broadening the scope of LC-MS compounds. Atmospheric pressure photoionization mainly obtains molecular ions or quasi-molecular ions, and the spectra are simple, facilitating spectral analysis. At the same time, due to the high collision frequency under atmospheric pressure, charge transfer or proton transfer reactions are likely to occur, and the product ion abundance is highly correlated with the sample concentration. As an ionization source for atmospheric pressure mass spectrometry, it has realized the highly sensitive detection of drugs in human whole blood and plasma and heavy metals in tap water. However, due to the low ionization efficiency of direct surface acoustic wave ionization, it is impossible to further improve the sensitivity. Theresa Evans-Nguyen et al. proposed an ionization source combining surface acoustic wave atomization and atmospheric pressure chemical ionization (Anal. Chem. 2019, 91, 912-918). Compared with traditional surface acoustic wave atomization ionization, the signal intensity of the ionization source combining surface acoustic wave atomization and atmospheric pressure chemical ionization has increased by 4 times. This ionization source expands the range of compounds that can be ionized by atmospheric pressure chemical ionization and is applicable to the ionization of polar and non-polar molecules.

[0003] Since the electrospray generated by the ESI (electrospray ionization source) in the prior art presents a conical shape, when the sample reaches the curtain plate, the spray width is similar to the diameter of the curtain plate. A repulsion electrode in front of the curtain plate will form a potential difference with the curtain plate to help the ionized sample enter the instrument more easily. However, the planar electrode only generates an axial thrust, and for the conical ion spray that diffuses in all directions, the ability to help the ionized sample enter the instrument is limited. Summary of the Utility Model

[0004] First, in order to overcome the deficiency in the prior art that the number of ionized samples entering the instrument is low, the utility model provides an ion source repulsion device, which can increase the number of ionized samples entering the instrument.

[0005] Second, on the premise of overcoming the deficiency in the prior art that the number of ionized samples entering the instrument is low, the utility model simplifies the arrangement of the repulsion electrode and the electrode surface, improving the overall experimental efficiency.

[0006] To achieve the above object, the utility model adopts the following technical solution: An ion source repulsion device includes an ionization source nozzle for ejecting ionized samples, an air curtain disk for receiving the ionized samples, and a repulsion electrode for pushing the ionized samples to the air curtain disk. The ionized samples ejected from the ionization source nozzle form an ejection path. The repulsion electrode is provided with a plurality of electrode surfaces that are circumferentially continuous or intermittent with the axis o as the center line. The axis o is any straight line parallel to the axis of the ejection path on the axis from the center of the air curtain disk to the ejection path. Each electrode surface is correspondingly provided with an independently adjustable coil for generating a magnetic field to push the ionized samples towards the entrance of the air curtain disk through the magnetic field.

[0007] After adopting the above technical solution, the utility model has the following advantages: By arranging an air curtain disk and a repulsion electrode on both sides of the ejection path formed by the ionized samples ejected from the ionization source nozzle, and the repulsion electrode is provided with a plurality of electrode surfaces that are circumferentially intermittent with the axis o as the center line. The axis o is any straight line parallel to the axis of the ejection path on the axis from the center of the air curtain disk to the ejection path. And each electrode surface is correspondingly provided with an independently adjustable coil for generating a magnetic field, so that each electrode surface is independent and can control the magnitude of the magnetic field separately, enabling the repulsion electrode to set different intensities according to the requirements of specific samples, enabling the electrode surface to provide the most effective repulsive force for the ionized samples, allowing more samples to enter the mass spectrometer, so that there is enough data in the mass spectrometer for analysis and processing, improving the analysis efficiency of the mass spectrometer and also improving the overall experimental efficiency; And setting the electrode surface to be circumferentially continuous can make the setting of the electrode surface relatively simple. Compared with the single plane in the prior art, the repulsion direction is more multi-dimensional, reducing the waste of samples and allowing more samples to enter the mass spectrometer.

[0008] Further, the shape of the side of the electrode surface facing the air curtain disk is a concave arc surface and is intermittently bent circumferentially along the axis of the ejection path.

[0009] Adopting the foregoing technical solution, by designing the shape of the electrode surface as an arc surface bent circumferentially along the axis of the ejection path, the electrode surface can repel the ionized samples towards the entrance of the air curtain disk in multiple directions and dimensions, improving the repulsion efficiency of the repulsion electrode, reducing the waste of ionized samples, increasing the number of samples entering the mass spectrometer, and accelerating the experimental speed.

[0010] Further, the circumferential angle of the plurality of electrode surfaces is 60° - 200°.

[0011] With the foregoing technical solution, the surrounding angle of the combination of multiple electrode surfaces can reach 60° to 200°, enabling different repulsive effects of the electrode surfaces for different experimental requirements, achieving diversified experimental requirements, and without the need to readjust more equipment settings. Just by changing the surrounding angle of the electrode surfaces, the experimental requirements for different samples can be met, and it can also adapt to different ionization source nozzles, curtain disks, and the sizes of mass spectrometers.

[0012] Furthermore, on the plane perpendicular to the ejection path and coinciding with the center of the curtain disk, the diameter of the circular projection surface of the ejection range of the ionized sample is smaller than the diameter of the fan-shaped surface formed by the electrode surfaces.

[0013] With the foregoing technical solution, by making the diameter of the circular projection surface of the ejection range of the ionized sample smaller than the diameter of the fan-shaped surface formed by the electrode surfaces on the plane perpendicular to the ejection path and coinciding with the center of the curtain disk, the electrode surfaces can more comprehensively push the ionized sample into the curtain disk.

[0014] Furthermore, on the plane perpendicular to the ejection path and coinciding with the center of the curtain disk, the diameter of the circular projection surface of the ejection range of the ionized sample is smaller than the diameter of the curtain disk inlet.

[0015] With the foregoing technical solution, by making the diameter of the circular projection surface of the ejection range of the ionized sample smaller than the diameter of the curtain disk inlet on the plane perpendicular to the ejection path and coinciding with the center of the curtain disk, the loss of the ionized sample can be reduced when the ionized sample is pushed into the curtain disk, enabling as many samples as possible to enter the curtain disk.

[0016] Furthermore, the arc surface shapes of the multiple electrode surfaces include one of a cylindrical arc surface, a conical arc surface, a spherical arc surface, an elliptical arc surface, a parabolic arc surface, a hyperbolic paraboloid, a hyperbolic arc surface, and a square cut spherical surface.

[0017] With the foregoing technical solution, there are multiple choices for the electrode surfaces, and a suitable arc surface can be selected according to different experimental objects and different experimental equipment, enabling it to adapt to more experimental situations.

[0018] Furthermore, the shape of the arc surface on the side of the multiple electrode surfaces facing the curtain disk is a concave arc surface. The arc surface has a curvature in the axial direction of the ejection path and has a tendency to approach the axis of the ejection path on the side far from the ionization source nozzle.

[0019] With the foregoing technical solution, by designing the electrode surface to have a curvature in the axial direction of the ejection path and a tendency to approach the axis of the ejection path on the side away from the ionization source nozzle, the electrode surface presents a semi-enclosed structure, which can increase an upward repulsive force, reduce the waste of ionized samples in the axial direction of the ejection path, and can push more ionized samples towards the curtain plate, enabling more ionized samples to enter the mass spectrometer, increasing the efficiency and speed of the experiment, and shortening the overall experimental time.

[0020] Further, the shape of the side of the electrode surface facing the curtain plate is a plane.

[0021] With the foregoing technical solution, by designing the shape of the side of the electrode surface facing the curtain plate to be a plane, the repulsive force directions of the electrode surface are consistent, increasing the repulsive force in the repulsive direction of the electrode surface, enabling the experimental samples in special cases to obtain a greater repulsive force and being able to enter the mass spectrometer behind the curtain plate more effectively.

[0022] Further, the axis o of the electrode surface is set at the center position of the curtain plate.

[0023] With the foregoing technical solution, by setting the axis o of the electrode surface at the center position of the curtain plate, under normal circumstances, the repulsive effect is optimal, enabling all the repelled ionized samples to directly enter the center of the curtain plate and sending the ionized samples into the mass spectrometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following further describes the present utility model with reference to the drawings:

[0025] Figure 1 It is a schematic diagram of Embodiment 1 of an ion source repulsive device of the present utility model;

[0026] Figure 2 It is Figure 1 a front cross-sectional view of;

[0027] Figure 3 It is Figure 2 a top view of;

[0028] Figure 4 It is a cross-sectional view of Embodiment 4 of an ion source repulsive device;

[0029] Figure 5 It is a schematic diagram of Embodiment 5 of an ion source repulsive device;

[0030] Figure 6 It is a schematic diagram of Embodiment 2 of an ion source repulsive device.

[0031] BRIEF DESCRIPTION OF THE DRAWINGS: 1. Ionization source nozzle; 11. Ejection range; 2. Curtain plate; 3. Repulsive electrode; 31. Electrode surface; 4. Ejection path. Detailed implementation manners

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part rather than all of the embodiments of the present utility model.

[0033] The terms "first", "second", etc. (if any) in the specification and claims of the present utility model are used to distinguish similar objects rather than to describe a specific order or sequence. Even if "second" is used to distinguish a certain technical feature, it does not necessarily imply the existence of "first". It should be understood that in the present utility model, "including" and "having" and any of their variations are intended to cover non-exclusive inclusion. It should be understood that in the present utility model, "a plurality of" means two or more. "And / or" is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, X and / or Y may represent: X exists alone, X and Y exist simultaneously, and Y exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "Including X, Y, and Z" and "including X, Y, Z" mean that all of X, Y, and Z are included. "Including X, Y, or Z" means including any one of X, Y, and Z. "Including X, Y, and / or Z" means including any one or any two or all three of X, Y, and Z.

[0034] The technical solutions of the present utility model will be described in detail below with specific embodiments. These several specific embodiments can be combined or replaced according to actual situations, and the same or similar concepts or processes may not be repeated in some embodiments.

[0035] In a mass spectrometer device, it includes units such as a sample introduction system, an ion source, a mass analyzer, and an ion detector. Their respective positions are as follows: Sample introduction system: Located at the front end of the entire mass spectrometer, it is the entrance for samples to enter the mass spectrometer. Its position is adjacent to the ion source to effectively transfer the sample into the ion source for subsequent ionization processes. Ion source: After the sample introduction system, the ion source is located near the outlet of the sample introduction system. The sample introduced from the sample introduction system is converted into gas-phase ions in the ion source. Mass analyzer: Located downstream of the ion source. The ions generated by the ion source enter the mass analyzer, and the mass analyzer separates and analyzes the ions according to the mass-to-charge ratio (m / z) of the ions. Ion detector: Located after the mass analyzer. The ions separated by the mass analyzer reach the ion detector, and the ion detector is used to detect and measure information such as the number and intensity of the ions, and convert this information into electrical signals or other readable signals for subsequent data processing and analysis.

[0036] In a mass spectrometer device, the curtain gas disk is usually located at the channel between the ion source and the mass analyzer. The ion source nozzle is located in the ion source area, where ions are generated and ejected. The specific position varies for different models of mass spectrometers. Generally, it is at the front end of the ion source or near the sample introduction position. At the same time, the repeller electrode is usually also located in the ion source. Its function is to push the ions generated in the ion source out of the ion source so that they enter subsequent components such as the mass analyzer for analysis. The specific structure and electrode position of different types of mass spectrometers may vary, but generally the repeller electrode plays a role at a specific position in the ion source.

[0037] Example 1:

[0038] As Figure 1 and Figure 2 shown, the present utility model provides an ion source repeller device, including an ionization source nozzle 1 for ejecting ionized samples after sample ionization, a curtain gas disk 2 for receiving ionized samples, and a repeller electrode 3 for pushing the ionized samples to the curtain gas disk 2. The ionized samples ejected from the ionization source nozzle 1 form an ejection path 4. The curtain gas disk 2 and the repeller electrode 3 are arranged on opposite sides of the ejection path 4. The inlet of the curtain gas disk 2 faces the ejection path 4. The repeller electrode 3 is provided with a plurality of electrode surfaces 31 that are circumferentially intermittent with the axis o as the center line. The axis o is any straight line parallel to the axis of the ejection path 4 on the axis from the center of the curtain gas disk 2 to the ejection path 4. Each electrode surface 31 is correspondingly provided with an independently adjustable coil for generating a magnetic field to push the ionized samples towards the inlet of the curtain gas disk 2 through the magnetic field.

[0039] After adopting the above technical solution, the present utility model has the following advantages: By arranging the curtain gas disk 2 and the repeller electrode 3 on both sides of the ejection path 4 formed by the ionized samples ejected from the ionization source nozzle 1, and the repeller electrode 3 is provided with a plurality of electrode surfaces 31 that are circumferentially intermittent with the axis o as the center line. The axis o is any straight line parallel to the axis of the ejection path 4 on the axis from the center of the curtain gas disk 2 to the ejection path 4. And each electrode surface 31 is correspondingly provided with an independently adjustable coil for generating a magnetic field, so that each electrode surface 31 is independent and can control the magnitude of the magnetic field separately, enabling the repeller electrode 3 to set different intensities according to the needs of specific samples, making the electrode surface 31 provide the most effective repulsive force for the ionized samples, enabling more samples to enter the mass spectrometer, making the samples in the mass spectrometer sufficient for the data required for analysis and processing, improving the analysis efficiency of the mass spectrometer, and also improving the overall experimental efficiency.

[0040] Preferably, the number of electrode surfaces 31 can be 3 or 5.

[0041] Example 2:

[0042] AsFigure 6 As shown, an ion source repulsion device includes an ionization source nozzle 1 for ejecting ionized samples after ionization, a curtain gas disk 2 for receiving the ionized samples, and a repulsion electrode 3 for pushing the ionized samples to the curtain gas disk 2. The ionized samples ejected from the ionization source nozzle 1 form an ejection path 4. The curtain gas disk 2 and the repulsion electrode 3 are arranged on opposite sides of the ejection path 4. The inlet of the curtain gas disk 2 faces the ejection path 4. The repulsion electrode 3 is provided with a plurality of electrode surfaces 31 that are circumferentially continuous with the axis o as the center line. The axis o is any straight line parallel to the axis of the ejection path 4 on the axis from the center of the curtain gas disk 2 to the ejection path 4. Each electrode surface 31 is correspondingly provided with an independently adjustable coil for generating a magnetic field to push the ionized samples towards the inlet of the curtain gas disk 2 through the magnetic field.

[0043] With the foregoing technical solution, by arranging the curtain gas disk 2 and the repulsion electrode 3 on both sides of the ejection path 4 formed by the ionized samples ejected from the ionization source nozzle 1, and arranging the electrode surfaces 31 circumferentially with the axis of the ejection path 4 as the center line on the repulsion electrode 3, the repulsion direction of the repulsion electrode 3 towards the ionized samples is increased. Compared with the single plane in the prior art, the repulsion direction is more multi-dimensional, reducing the waste of samples, enabling more samples to enter the mass spectrometer, and making the samples in the mass spectrometer sufficient for the data required for analysis and processing. Compared with the setting method of independently separating the electrode surfaces 31, the repulsion electrode 3 in this solution is relatively convenient to set. Under some experimental conditions with not too high requirements, this solution can be used to improve the analysis efficiency of the mass spectrometer and also improve the overall experimental efficiency.

[0044] Preferably, the number of the electrode surfaces 31 can be 3 or 5.

[0045] Example 3:

[0046] Based on Example 1 or Example 2, as Figure 3 shown, the shape of the side of the electrode surface 31 facing the curtain gas disk 2 is a concave arc surface, and it is intermittently bent circumferentially along the axis of the ejection path 4.

[0047] With the foregoing technical solution, by designing the electrode surface 31 such that the shape of the side of the electrode surface 31 facing the curtain gas disk 2 is a concave arc surface and it is intermittently bent circumferentially along the axis of the ejection path 4, the electrode surface 31 can repel the ionized samples towards the inlet of the curtain gas disk 2 in multiple directions and dimensions, improving the repulsion efficiency of the repulsion electrode 3, making the intensity of the electrode surface 31 in repelling the ionized samples more uniform, reducing the waste of the ionized samples, increasing the number of samples entering the mass spectrometer, and accelerating the experimental speed.

[0048] Furthermore, the circumferential angle of the plurality of electrode surfaces 31 is 60° - 200°.

[0049] With the foregoing technical solution, the surrounding angle formed by the combination of multiple electrode surfaces 31 can reach 60° to 200°, enabling different repulsive effects of the electrode surfaces 31 for different experimental requirements, achieving diversified experimental requirements, and without the need to readjust more device settings. Just by changing the surrounding angle of the electrode surfaces 31, the experimental needs for different samples can be met, and it can also adapt to the sizes of different ionization source nozzles 1, curtain disks 2, and mass spectrometers.

[0050] Specifically, the surrounding angle of the electrode surfaces 31 is measured starting from one side of the electrode surface 31 closest to the curtain disk 2, with the axis of the ejection path 4 as the center line, until reaching the other side of the electrode surface 31 close to the curtain disk 2, and the total angle reaches the set angle.

[0051] Furthermore, on the plane perpendicular to the ejection path 4 and coinciding with the center of the curtain disk 2, the diameter of the circular projection surface of the ejection range 11 of the ionized sample is smaller than the diameter of the fan-shaped surface formed by the electrode surfaces 31.

[0052] With the foregoing technical solution, by making the diameter of the circular projection surface of the ejection range 11 of the ionized sample smaller than the diameter of the fan-shaped surface formed by the electrode surfaces 31 on the plane perpendicular to the ejection path 4 and coinciding with the center of the curtain disk 2, the electrode surfaces 31 can more comprehensively push the ionized sample into the curtain disk 2.

[0053] Furthermore, on the plane perpendicular to the ejection path 4 and coinciding with the center of the curtain disk 2, the diameter of the circular projection surface of the ejection range 11 of the ionized sample is smaller than the diameter of the entrance of the curtain disk 2.

[0054] With the foregoing technical solution, by making the diameter of the circular projection surface of the ejection range 11 of the ionized sample smaller than the diameter of the entrance of the curtain disk 2 on the plane perpendicular to the ejection path 4 and coinciding with the center of the curtain disk 2, the loss of the ionized sample can be reduced when the ionized sample is pushed into the curtain disk 2, enabling as many samples as possible to enter the curtain disk 2.

[0055] Furthermore, the arc surface shapes of the multiple electrode surfaces 31 include one of a cylindrical arc surface, a conical arc surface, a spherical arc surface, an elliptical arc surface, a parabolic arc surface, a hyperbolic paraboloid, a hyperbolic arc surface, and a square cut spherical surface.

[0056] With the foregoing technical solution, multiple types of electrode surfaces 31 can be selected, and a suitable arc surface can be chosen according to different experimental objects and different experimental devices, enabling it to adapt to more experimental situations.

[0057] Specifically, the arc surfaces of the plurality of electrode surfaces 31 are all the same and can each be one of a cylindrical arc surface, a conical arc surface, a spherical arc surface, an elliptical arc surface, a parabolic arc surface, a hyperbolic paraboloid, a hyperbolic arc surface, and a spherical surface with a square section. The arc surfaces of the plurality of electrode surfaces 31 are not all the same and can be one of a cylindrical arc surface, a conical arc surface, a spherical arc surface, an elliptical arc surface, a parabolic arc surface, a hyperbolic paraboloid, a hyperbolic arc surface, and a spherical surface with a square section.

[0058] Preferably, the number of electrode surfaces 31 can be 3 or 5.

[0059] Example 4:

[0060] Based on Example 1 or Example 2, as Figure 4 shown, the shape of the arc surface of the plurality of electrode surfaces 31 facing the side of the air curtain disk 2 is an arc surface. The arc surface has a curvature in the axial direction of the ejection path 4 and has a tendency to approach the axis of the ejection path 4 on the side away from the ionization source nozzle 1.

[0061] Adopting the foregoing technical solution, by designing that the electrode surface 31 has a curvature in the axial direction of the ejection path 4 and has a tendency to approach the axis of the ejection path 4 on the side away from the ionization source nozzle 1, the electrode surface 31 presents a semi-enclosed structure, which can increase an upward repulsive force, reduce the waste of ionized samples in the axial direction of the ejection path 4, and reduce the falling speed of the ionized samples. It can push more ionized samples towards the air curtain disk 2, enable more ionized samples to enter the mass spectrometer, increase the efficiency and speed of the experiment, and shorten the overall experimental time.

[0062] Preferably, the number of electrode surfaces 31 can be 3 or 5.

[0063] Example 5:

[0064] Based on Example 1 or Example 2, as Figure 5 shown, the shape of the side of the electrode surface 31 facing the air curtain disk 2 is a plane. Adopting the foregoing technical solution, by designing the shape of the side of the electrode surface 31 facing the air curtain disk 2 to be a plane, the repulsive force directions of the electrode surface 31 are made consistent, increasing the repulsive force in the repulsive direction of the electrode surface 31, enabling the experimental samples in special cases to obtain a greater repulsive force and being able to enter the mass spectrometer behind the air curtain disk 2 more effectively.

[0065] Specifically, based on Example 1, the planes of the electrode surface 31 are arranged at intervals, while based on Example 2, the planes of the electrode surface 31 are connected in a head-to-tail connection form.

[0066] Further, the axis o of the electrode surface 31 is disposed at the center position of the air curtain disk 2. With the foregoing technical solution, by disposing the axis o of the electrode surface 31 at the center position of the air curtain disk 2, under normal circumstances, the repulsion effect is optimal, enabling all the repelled ionized samples to directly enter the center of the air curtain disk 2, and sending the ionized samples into the mass spectrometer.

[0067] Preferably, the electrode surface 31 may be three or five.

[0068] In addition to the above preferred embodiments, the present utility model has other implementation manners. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope claimed by the present utility model.

Claims

1. An ion source repelling device, characterized in that: The invention comprises an ionization source nozzle for ionizing a sample and then ejecting it, an air curtain disk for receiving the ionized sample, and a repeller electrode for pushing the ionized sample to the air curtain disk. The ionized sample ejected from the ionization source nozzle forms an ejection path. The air curtain disk and the repeller electrode are arranged on opposite sides of the ejection path. The inlet of the air curtain disk faces the ejection path. The repeller electrode is provided with a plurality of electrode surfaces which are continuously or discontinuously arranged circumferentially with an axis o as the center line. The axis o is any straight line parallel to the axis of the ejection path from the center of the air curtain disk to the axis of the ejection path. Each electrode surface is correspondingly provided with an independently adjustable coil for generating a magnetic field so as to push the ionized sample to the inlet of the air curtain disk through the magnetic field.

2. An ion source repelling device according to claim 1, characterized in that: The electrode surface is shaped as an inwardly concave arc surface on the side facing the air curtain disk, and is intermittently curved along the circumferential direction of the ejection path axis.

3. An ion source repelling device according to claim 1, characterized in that: The surrounding angle of the plurality of electrode surfaces is 60° to 200°.

4. An ion source repelling device according to claim 1, characterized in that: On a plane perpendicular to the ejection path and coinciding with the center of the gas curtain disk, the diameter of the circular projection surface of the ejection range of the ionized sample is smaller than the diameter of the fan-shaped surface surrounded by the electrode surfaces.

5. An ion source repelling device according to claim 1, characterized in that: On a plane perpendicular to the ejection path and coinciding with the center of the gas curtain disk, the diameter of the circular projection surface of the ejection range of the ionized sample is smaller than the diameter of the inlet of the gas curtain disk.

6. An ion source repelling device according to claim 2, characterized in that: The arc-shaped surfaces of the plurality of electrode surfaces include one of a cylindrical arc surface, a conical arc surface, a spherical arc surface, an elliptical arc surface, a parabolic arc surface, a hyperbolic paraboloid, a hyperbolic arc surface and a square spherical cut surface.

7. An ion source repelling device according to claim 1, characterized in that: The arcuate surfaces of the plurality of electrode surfaces are shaped as concave arcuate surfaces on the side facing the air curtain disk. The arcuate surfaces have curvature in the axial direction of the ejection path and tend to approach the axis of the ejection path on the side away from the ionization source nozzle.

8. An ion source repelling device according to claim 1, characterized in that: The shape of the side of the electrode surface facing the air curtain disk is a plane.

9. An ion source repelling device according to claim 1, characterized in that: The axis o of the electrode surface is arranged at the center of the air curtain disk.

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