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Large-capacity electrostatic ion trap for ion storage

An electrostatic ion trap and ion storage technology, applied in the field of ion optics, can solve the problems of limited ion storage capacity, reduced ion trap sensitivity and resolution performance, etc., to achieve the effect of improving signal-to-noise ratio, avoiding space charge effect, and increasing capacity

Active Publication Date: 2019-06-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the ions are trapped near a small point in the center of the trap, the space charge effect severely limits the capacity of ion storage when the number of ions is large, which greatly reduces the sensitivity and resolution performance of the ion trap.

Method used

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  • Large-capacity electrostatic ion trap for ion storage
  • Large-capacity electrostatic ion trap for ion storage
  • Large-capacity electrostatic ion trap for ion storage

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Experimental program
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Embodiment

[0044] The first and second ground electrodes, the first and second focusing electrodes, the first, second, third and fourth reflective electrodes are all rectangular ring-shaped electrodes with a rectangular through hole in the middle, and the outer contour of the electrode is 240mm long. The height is 50mm, the thickness is 25mm, the size of the rectangular through hole is 200mm long, and the height is 25mm. The outer contours of the first and second reflective ground electrodes are 240mm long, 50mm high, and 25mm thick, and the rectangular slots are 200mm wide, 25mm high, and 20mm deep.

[0045] The first reflective electrode group is composed of the first reflective bottom electrode, the first reflective electrode, the second reflective electrode, the first focusing electrode and the first ground electrode, and the distance between each electrode is 2 mm; the second ground electrode, the second focusing electrode, the first ground electrode The four reflective electrodes, ...

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Abstract

The invention provides a large-capacity electrostatic ion trap device and method. The principle that a mirror reflects and folds an ion path for multiple times is used, and implanted ions are stored between two sets of mirror-symmetrical electrostatic mirrors. After a certain time, pulse is applied to an ion gate electrode to extract all enriched ions. In an ion storage mode, the ions are distributed in a reflective electrode group and a field-free region of an electrostatic ion trap, the storage space is large, the influence of a space charge effect is effectively avoided, the capacity of theion storage is increased, and the signal-to-noise ratio can be raised.

Description

technical field [0001] The invention relates to the field of ion optics, and specifically provides a high-capacity electrostatic ion trap and a method for ion storage and enrichment. The principle of the present invention is based on the way that the mirror folds the ion path multiple times, and the implanted ions are stored between two sets of mirror-symmetrical electrostatic mirrors, and after a certain period of time, a pulse is applied to the ion gate electrode to extract all the enriched ions . The ion storage space is large, which effectively avoids the influence of the space charge effect, increases the capacity of ion storage, and improves the signal-to-noise ratio. Background technique [0002] The conventional 3D ion trap is composed of a hyperbolic ring electrode and end cap electrodes at both ends. The ions are trapped in the trap by radio frequency voltage, which can be used as an ion storage device and a mass analyzer. Since the ions are trapped near a small ...

Claims

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Application Information

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IPC IPC(8): H01J49/06
Inventor 陈平侯可勇蒋吉春吴称心李海洋
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI