Dual ion source slow electron velocity imaging device

Abstract

The invention discloses a dual ion source slow electron velocity imaging device. The device comprises a laser evaporation ion source, an electrospray ion source, an analysis chamber, a time-of-flightmass spectrometry system and a slow electron velocity imaging system, wherein the laser evaporation ion source and the electrospray ion source are respectively arranged on two sides of the analysis chamber, the time-of-flight mass spectrometry system and the slow electron velocity imaging system are both arranged in the analysis chamber, and a matched camera is arranged outside the analysis chamber. The design of the double ion sources widens the research system of a single device and the generation channel of the target anion cluster; the device has the capability of detecting single-charge and multi-charge anion clusters generated by solid-phase and liquid-phase samples, and compared with two instruments with single ion sources, the integration of the double ion sources has the advantages that accessories such as a vacuum cavity, a molecular pump and a detector are saved, the expenditure is saved, and meanwhile, the operation steps of the instrument are simplified.

Description

technical field [0001] The invention relates to the technical field of mass spectrometry and photoelectron imaging, in particular to a dual ion source slow electron velocity imaging device. Background technique [0002] Gas phase experiments can avoid the influence of complex chemical environments, sample defects, inhomogeneity and other factors in liquid and solid phases, and provide an ideal research model for isolated systems. Single- and multiply-charged anion clusters are widely distributed in nature, and exploring their geometric and electronic structures is of great significance for understanding chemical reactions in nature and designing industrial catalysts. The laser evaporation cluster source can ionize solid-phase metals, metal compounds and other samples to generate single-charged anion clusters. The electrospray ion source can ionize the organic matter in the liquid phase to generate multi-charged anion clusters of small organic molecules and biological macrom...

AI Technical Summary

Problems solved by technology

[0003] At present, there are very few research groups at home and abroad using time-of-flight mass spectrometry combined with slow electron velocity imaging technology to study anion clusters. Most of their instruments use a single ion source, which severely limits the scope and flexibility of the research system; Electronic properties of different charges of the same anion cluster, the entire instrument needs to be replaced, which will change the detection conditions of ions, generate new variables, and the experimental operation is complicated and time-consuming

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