双反射飞行时间质量分析器高分辨光电子成像谱仪研制  

Development of High-Resolution Photoelectron Imaging with Dual-Reflection Time of Flight Mass Analyzer

作　　者：费泽杰 韩昌财 王永天 徐辉 洪静 江一煌 周源 居鹤晨 董常武 刘洪涛[1] Zejie Fei;Changcai Han;Yongtian Wang;Hui Xu;Jing Hong;Yihuang Jiang;Yuan Zhou;Hechen Ju;Changwu Dong;Hongtao Liu(Key Laboratory of Interfacial Physics and Technology,Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;Shanghai Key Lab of Chemical Assessment and Sustainability,Department of Chemistry,Tongji University,Shanghai 200092,China;University of Chinese Academy of Sciences,Beijing 100049,China;College of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200090,China)

机构地区：[1]中国科学院上海应用物理研究所,微观界面物理与探测重点实验室,上海201800 [2]同济大学化学系,上海市化学品分析评估与控制重点实验室,上海200092 [3]中国科学院大学,北京100049 [4]上海理工大学材料与化学学院,上海200090

出　　处：《Chinese Journal of Chemical Physics》2024年第2期153-161,I0101,共10页化学物理学报（英文）

基　　金：This work was supported by the Scientific Instrument Developing Project of the Chinese Academy of Sciences(No.YJKYYQ20190027);Youth Innovation Promotion Association,Chinese Academy of Science(No.2021255);Shandong Energy Research Institute Enterprise Joint Fund(SE1 U202312);"Strategic Priority Research Program"of the Chinese Academy of Sciences(No.XDA02020000);the National Natural Science Foundation of China(No.22273065).

摘　　要：本文报道了一台结合电喷雾离子源和双反射飞行时间质谱的速度成像光电子能谱仪的研制过程,其可用于开展溶液中负离子的光电子能谱研究.在该装置中,电喷雾离子源产生的负离子由四极杆组成的离子引导系统传输至冷离子阱,并对负离子进行富集和冷却,用于后端的质量选择和光电子能谱探测.该装置的关键技术之一是将双反射质量分析器与Wiley-McLaren离子加速聚焦设计进行了串联:这样可以有效地提高质谱分辨,从而准确地选择目标离子,其质量分辨率(M/△M)可达2000以上.该装置的高分辨光电子速度成像系统采用多极电子透镜设计,对于动能为0.59eV的光电子,其能谱峰的半高宽约为5.8meV,相对分辨率为~0.98%本文对该装置的工作原理,结构设计和性能测试情况进行了详细阐述。A velocity map imaging photoelectron spectroscopy,coupled with an electrospray ionization source and a dual-reflection time of flight(TOF)mass analyzer has been developed for the investigation of anions in the gas phase.Anions formed in the electrospray source are guided by a radio-frequency quadrupole ion guide into a quadrupole ion trap,where the ions are accumulated.A unique feature of this apparatus involves the coupling of a dual-reflection mass analyzer to the original Wiley-McLaren design.This can effectively improve the mass spectrum resolution,so as to accurately select the target ion.The mass resolution(M/ΔM)above 2000 can be achieved.The velocity map imaging spectrometer resolution is about 5.8 meV full width at half maximum for the photoelectrons with the kinetic energy of 0.59 eV,leading to a relative resolution of~0.98%.The detailed design,construction,and operation of the new apparatus are presented.

关 键 词：高分辨光电子成像 双反射飞行时间质谱 光电子能谱 

分 类 号：O644[理学—物理化学]