An ion trap device with stepped grid electrode structure

A technology of grid electrodes and ion traps, which is applied to parts of particle separator tubes, dynamic spectrometers, trajectory-stabilized spectrometers, etc., can solve problems such as limited ion intensity, improve mass resolution, and reduce electric field loss and distortion, improving ion storage and mass analysis performance

Active Publication Date: 2016-09-28
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, the limited width of the slit physically limits the number of ejected ions, and the ion intensity detected by the linear ion trap is limited

Method used

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  • An ion trap device with stepped grid electrode structure
  • An ion trap device with stepped grid electrode structure
  • An ion trap device with stepped grid electrode structure

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Experimental program
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specific Embodiment 1

[0039] Specific embodiment 1 reference Figure 4 — Figure 6 shown, where Figure 4 It is a three-dimensional structural diagram of the ion trap of this solution, which is composed of six electrodes, which are a pair of electrodes 102 and 103 in the z direction, and the electrode shape is a flat plate electrode. The electrode 102 is provided with a through hole (aperture), the size of which is several millimeters, for introducing the sample ions 101 . A pair of electrodes 106 and 107 in the x direction, a pair of electrodes 104 and 105 in the y direction. Define the x-direction to be the direction in which ions are ejected. Electrodes 106 and 107 are stepped electrodes loaded with grids, and grids 108 are positioned on the highest step surface, such as Figure 6 shown. The grid covering the electrode part is processed into a cavity structure. The electrodes 104 and 105 are stepped electrodes not loaded with a grid. Figure 5 It is a cross-sectional view of the center of...

Embodiment 2

[0042] Figure 10 — Figure 11 Shown is the schematic structural view of the ion trap device of specific embodiment 3, wherein Figure 10 It is a three-dimensional structural diagram of the ion trap of this solution, which is composed of six electrodes, which are a pair of electrodes 302 and 303 in the z direction, and the electrode shape is a flat plate electrode. An aperture is opened on the electrode 302 for introducing sample ions 401 . A pair of electrodes 306 and 307 in the x direction, a pair of electrodes 304 and 405 in the y direction. Define the x-direction to be the direction in which ions are ejected. The electrodes 305 , 306 , and 307 in the entire ion trap are all step grid electrodes, and the grid cover electrodes are processed into a cavity structure. The electrode 304 is a stepped electrode without a grid. Figure 11 It is a two-dimensional cross-sectional schematic diagram of an electrode pair in the x and y directions at the center of the ion trap. The ...

Embodiment 3

[0044] Figure 12 — Figure 13 Shown is the structural representation of the ion trap device of specific embodiment 4, wherein Figure 12 It is a three-dimensional structural diagram of the ion trap of this solution, which is composed of six electrodes, which are a pair of electrodes 402 and 403 in the z direction, and the electrode shape is a flat plate electrode. An aperture is opened on the electrode 402 for introducing sample ions 401 . A pair of electrodes 406 and 407 in the x direction, a pair of electrodes 404 and 405 in the y direction. Define the x-direction to be the direction in which ions are ejected. The electrodes 404 , 405 , 406 , and 407 in the entire ion trap are stepped electrodes loaded with grids, and the grids cover the electrode parts processed into hollows. Figure 13 It is a two-dimensional cross-sectional schematic diagram of the electrode pair in the x and y directions at the center of the ion trap. The two pairs of electrodes are symmetrically d...

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Abstract

The invention belongs to the technical field of analytical instruments, and in particular relates to an ion trap device with a step grid mesh electrode structure. The ion trap has a spatial three-dimensional structure encircled by at least one pair of step-shaped electrodes loaded with a conductive grid mesh and a few other electrodes. Ions entering the ion trap are stored under the action of the working voltage of the ion trap; the ions stored in the ion trap are excited and escape from the ion trap through the conductive grid mesh on the step-shaped grid mesh electrodes; an ion detector arranged outside the step-shaped grid mesh electrodes of the ion trap can detect the ions escaping from the ion trap; and the electric field distribution in the ion trap can be regulated by changing the shapes of the step-shaped electrodes, and the escape efficiency of the ions and the detection sensitivity of the ion trap can be improved by using the grid mesh electrodes. The device is easy to machine and low in cost, and can improve the ion storage and quality analysis performance of the ion trap.

Description

technical field [0001] The invention belongs to the field of analytical instruments and technologies, and in particular relates to an ion trap device for realizing ion storage and mass analysis. Background technique [0002] A mass spectrometer is a scientific instrument that can analyze the mass and content of atoms and molecules, and it can analyze the chemical composition and content of unknown samples. Mass spectrometers are widely used in life sciences, environmental testing, food safety, national security, and other fields. A mass spectrometer is mainly composed of key components such as an ion source, a mass analyzer, and an ion detector, among which the mass analyzer is its core component. According to the different mass analyzers used, mass spectrometers can be divided into magnetic mass spectrometers, quadrupole mass spectrometers, ion trap mass spectrometers, time-of-flight mass spectrometers, orbital ion trap mass spectrometers, ion cyclotron resonance mass spec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J49/02H01J49/42
Inventor 王亮徐福兴丁传凡
Owner FUDAN UNIV
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