负离子光电子成像系统的设计及分析

Design and Analysis of Negative Ion Photoelectron Imaging System

基于负离子光电子成像技术,设计和搭建了一套基于负离子的高分辨光电子成像系统。通过优化负离子源获得高产率负离子,并利用离子透镜偏转负离子,使其聚焦于光作用区,从而提高负离子束流密度。在此基础上,通过调整脉冲阀、脉冲引场、脉冲激光之间的时序,实现负离子和激光的垂直作用,并利用成像系统采集光解过程中的产物,最终实现对负离子的高分辨光电子成像。

Based on the negative ion photoelectron imaging technology,a set of negative ion based high-resolution photoelectron imaging system was designed and constructed.By optimizing the negative ion source to obtain high yield negative ions,the negative ions are deflected using an ion lens to focus on the light action region,thereby improving the negative ion beam density.On this basis,by adjusting the timing between the pulse valve,pulse induced field,and pulse laser,the vertical interaction between the negative ions and the laser is achieved,and the imaging system is used to collect the products during the photolysis process,ultimately achieving high-resolution photoelectron imaging of the negative ions.