Synchronous pulse-based ion transmission method and flight time mass spectrometer

Abstract

The invention belongs to an ion optical technology, and particularly relates to a synchronous pulse-based ion transmission method and a flight time mass spectrometer. On the basis of accurate ball passing idea, the factor that ions in a region are led out and accelerated by a pulse leading-out field to form a moving ion cluster is creatively proposed, appropriate time is selected and a second pulse electric field is applied when ion crowd passes through the second pulse electric field region, the problems of focusing and detection of background ion pairs during pulse leading-out are solved, the synchronous pulse-based ion transmission method and the flight time mass spectrometer can be applied to a scientific instrument relevant to ion motion, and a remarkable effect of improving ion utilization efficiency is achieved.

Description

technical field [0001] The invention belongs to the ion optics technology, and specifically relates to an ion transmission method based on synchronous pulses and a time-of-flight mass spectrometer based on the method, which can be applied to scientific instruments related to ion motion. Background technique [0002] The working mode of the ion source can be divided into continuous type and pulse type. Most of the ion sources work continuously. A large number of ions are continuously generated in the ion source. Under the influence of inertial thinking, most of them adopt the continuous extraction method. The continuous extraction method has the following disadvantages: 1. If the subsequent ion detection works in the pulse detection mode, a large amount of extracted ions will be wasted and the detection efficiency will be reduced. 2. When there are too many ions in the ion cluster, the space charge effect will affect the focusing effect of the ions. 3. A large number of non-...

AI Technical Summary

Problems solved by technology

The continuous extraction method has the following disadvantages: 1. If the subsequent ion detection works in the pulse detection mode, a large amount of extracted ions will be wasted and the detection efficiency will be reduced.

2. When there are too many ions in the ion cluster, the space charge effect will affect the focusing effect of the ions

3. A large number of non-concerned ions reach the detector, which affects the service life of the detector

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