Efficient mass spectrum ion source device

Abstract

The utility model relates to the technical field of mass spectrometers, in particular to a high-efficiency mass spectrum ion source device, which comprises a source heating block, a spacer ring is inserted in the source heating block, the spacer ring is sleeved on the outer side of a repulsion pole with a conical structure, an ion source cylinder is fixed on one side of the source heating block, and the ion source cylinder is fixed on the other side of the source heating block. And an electrode plate, a focusing electrode and an extraction electrode are fixed on the inner wall of the ion source cylinder. According to the high-efficiency mass spectrum ion source device, the repulsion pole with a conical structure is designed, and the shape and intensity of an electric field in the ion chamber are adjusted by changing the shape of the repulsion pole, so that generated ions are centripetally focused towards an outlet, the ion transmission efficiency is improved, the interference of neutral molecules can be effectively reduced, and the quality of the ion source is improved. A good effect is achieved in the aspect of improving the overall sensitivity of the mass spectrometer, and the device can enable more ions to be focused and migrated out of an ion source, so that the sensitivity of the mass spectrometer is improved, and more excellent electric field distribution and ion migration efficiency are achieved.

Description

Technical Field

[0001] This utility model relates to the field of mass spectrometry technology, specifically to a high-efficiency mass spectrometry ion source device. Background Technology

[0002] The ion source is the core component of a mass spectrometer, and the electron impact ionization source is one of the most widely used ion sources. The ionization efficiency and ion transport efficiency of the ion source directly affect the sensitivity of the mass spectrometer. On the one hand, the higher the ionization efficiency, the more ions can be detected, and the higher the instrument sensitivity. On the other hand, the higher the ion transport efficiency, the more ions reach the detector, and the higher the instrument sensitivity.

[0003] The existing mass spectrometer ion source devices have poor repulsion electrode shape design, resulting in slow ion transmission efficiency, difficulty in reducing interference from neutral molecules, and low overall sensitivity of the mass spectrometer. To address these issues, improvements to the existing equipment are necessary. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency mass spectrometry ion source device that can enable more ions to migrate out of the ion source through focusing, thereby improving the sensitivity of the mass spectrometer.

[0005] This utility model provides a high-efficiency mass spectrometry ion source device, including a source heating block, a spacer ring inserted inside the source heating block, the spacer ring being placed outside the repulsion electrode of the conical structure, an ion source cylinder fixed on one side of the source heating block, and an electrode plate, a focusing electrode and an extraction electrode fixed on the inner wall of the ion source cylinder.

[0006] Preferably, the spacer ring is fixed to the source heating block by a nut.

[0007] Preferably, the top of the ion source cylinder is threaded with a guide port.

[0008] Preferably, an ion source flange is fixed to the ion source cylinder by fastening screws.

[0009] Preferably, a filament bracket is fixed on the source heating block, and a filament body is fixed on the filament bracket.

[0010] The technical effects that can be achieved by the technical means of this utility model are as follows:

[0011] This high-efficiency mass spectrometry ion source device features a cone-shaped repulsion electrode. By changing the shape of the repulsion electrode, the shape and intensity of the electric field inside the ionization chamber are adjusted, causing the generated ions to focus centripetally and toward the exit, thereby improving ion transmission efficiency. It can also effectively reduce interference from neutral molecules, achieving excellent results in improving the overall sensitivity of the mass spectrometer. This device can enable more ions to migrate out of the ion source, thereby improving the sensitivity of the mass spectrometer and exhibiting superior electric field distribution and ion migration efficiency. Attached Figure Description

[0012] Figure 1 This is a left-side stereoscopic structural diagram of the present invention;

[0013] Figure 2 This is a right-view three-dimensional structural diagram of the present invention;

[0014] Figure 3 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0015] Figure 4 This is a frontal cross-sectional view of the present invention.

[0016] Figure 5 This is a schematic diagram of the ion source flange structure of this utility model;

[0017] Figure 6 This is a schematic diagram of the connection structure of the source heating block, guide port, ion source tube, filament body and filament support of this utility model.

[0018] In the figure: 1. Source heating block; 2. Repulsion electrode; 3. Spacer ring; 4. Guide port; 5. Ion source tube; 6. Electrode plate; 7. Focusing electrode; 8. Ion source flange; 9. Lead-out electrode; 10. Electrode isolation plate; 11. Filament body; 12. Filament support. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0020] A preferred embodiment of the high-efficiency mass spectrometry ion source device provided by this utility model is, for example... Figures 1 to 2As shown, it includes a source heating block 1, a spacer 3 inserted inside the source heating block 1, the spacer 3 being placed on the outside of the repulsion electrode 2 of the conical structure, an ion source cylinder 5 fixed on one side of the source heating block 1, and an electrode plate 6, a focusing electrode 7 and an extraction electrode 9 fixed on the inner wall of the ion source cylinder 5.

[0021] In this embodiment, the spacer 3 is fixed to the source heating block 1 by a nut. The spacer 3 is located between the repulsion electrode 2 and the source heating block 1, and can play a protective role.

[0022] Furthermore, the top of the ion source cylinder 5 is threaded with a guide port 4. When the guide port 4 is screwed onto the ion source cylinder 5, the guide port 4 can serve as a guide. Example 2

[0023] Based on Example 1, a preferred embodiment of the high-efficiency mass spectrometry ion source device provided by this invention is as follows: Figures 3 to 6 As shown,

[0024] Furthermore, an ion source flange 8 is fixed to the ion source cylinder 5 by fastening screws. The ion source flange 8 can be fixed to the ion source cylinder 5 by fastening screws, and the ion source flange 8 can play a role in strengthening the connection and sealing.

[0025] Preferably, a filament support 12 is fixed on the source heating block 1, and a filament body 11 is fixed on the filament support 12. The filament support 12 supports the filament body 11. After the filament body 11 is heated to a high temperature by electricity, it will release a large number of thermionic electrons. These thermionic electrons gain energy under the action of electromagnetic field and collide with gas molecules or atoms, causing them to ionize and form ions.

[0026] In use, first, place the spacer 3 on the outside of the repulsion electrode 2 and insert it into the hole of the source heating block 1, fix it with a nut, and then fix them on the ion source cylinder 5. Screw the guide port 4 onto the ion source cylinder 5. Use a special tool to fix the filament body 11 onto the filament support 12, then insert it into the side of the source heating block 1 and fix it on the source heating block 1. Then, install the electrode plate 6, focusing electrode 7, lead-out electrode 9, and electrode isolation plate 10 into the hole of the ion source cylinder 5 in sequence and fix them with set screws. Fix the ion source flange 8 to the ion source cylinder 5 with screws. After the filament body 11 is heated to a high temperature by electricity, it releases a large number of thermionic electrons. These thermionic electrons gain energy under the action of the electromagnetic field and collide with gas molecules or atoms, causing them to ionize and form ions. This completes the entire operation.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

[0028] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency mass spectrometry ion source device, comprising a source heating block (1), characterized in that: A spacer (3) is inserted inside the source heating block (1). The spacer (3) is placed on the outside of the repulsion electrode (2) of the conical structure. An ion source cylinder (5) is fixed on one side of the source heating block (1). An electrode plate (6), a focusing electrode (7) and an extraction electrode (9) are fixed on the inner wall of the ion source cylinder (5).

2. The high-efficiency mass spectrometry ion source device as described in claim 1, characterized in that: The spacer ring (3) is fixed to the source heating block (1) by a nut.

3. The high-efficiency mass spectrometry ion source device as described in claim 1, characterized in that: The top of the ion source tube (5) is threaded with a guide port (4).

4. The high-efficiency mass spectrometry ion source device as described in claim 1, characterized in that: An ion source flange (8) is fixed to the ion source cylinder (5) by fastening screws.

5. The high-efficiency mass spectrometry ion source device as described in claim 1, characterized in that: A filament bracket (12) is fixed on the source heating block (1), and a filament body (11) is fixed on the filament bracket (12).

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