Ion beam focusing ion transmission device

Abstract

The invention provides an ion transmission device capable of realizing ion beam focusing. The device comprises a collecting cylinder electrode, an electrode plate, a first insulating spacer, a first cylindrical electrode, a second cylindrical electrode, a second insulating spacer, a third cylindrical electrode and a flat electrode, the device further comprises an electrode fixing module, a supporting cylinder and a flange support. Wherein the ion transmission device is provided with an extending axis, the collecting cylinder electrode, the electrode plate, the first cylindrical electrode, the second cylindrical electrode, the third cylindrical electrode and the flat electrode are sequentially arranged along the extending axis, and the collecting cylinder electrode, the electrode plate, the first cylindrical electrode, the second cylindrical electrode, the third cylindrical electrode and the flat electrode are each provided with a central through hole. The central through holes are communicated with each other to form an ion transmission channel; certain voltage can be applied to the collection cylinder electrode, the electrode plate, the first cylindrical electrode, the second cylindrical electrode, the third cylindrical electrode and the flat electrode so as to realize ion beam focusing.

Description

technical field [0001] The disclosure belongs to the field of core devices of mass spectrometers, and in particular relates to an ion transmission device capable of realizing ion beam focusing. Background technique [0002] Time-of-flight mass spectrometry is a very common, reliable and effective detection technique in various scientific research laboratories and various testing institutions. As a key component of a mass spectrometer, the ion transport device's focusing ability and spatial distribution of ions will directly affect the resolving power of the mass spectrometer. [0003] Over the past few decades, mass spectrometry has developed rapidly, especially the continuous improvement of the resolving power of time-of-flight mass spectrometry, which has been widely used in the detection field and provides a good technical means for studying molecular reaction kinetics. This means that there is a higher requirement for the resolving power of the mass spectrometer, that i...

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Problems solved by technology

This means that there is a higher requirement for the resolving power of the mass spectrometer, that is, the translational energy released by the dissociation of different molecular ions is very different, which requires that these ions can be focused in space; in the past similar devices In the design, on the one hand, the three-piece electrode is used to realize the spatial focusing of the ion beam, but it will cause a great loss of primary ions; on the other hand, in order to improve the high-resolution capability of the mass spectrometer, a slit is added in the ion transmission device to filter the ions beam, but this greatly weakens the detection sensitivity of the mass spectrometer

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