中国光学（中英文）2024，Vol.17Issue(6)：1351-1358,8.DOI:10.37188/CO.2024-0037
激光暗荧光光谱电场测量微扰计算与实验
Calculation and experiment of tiny perturbations in electric field measurement for the laser-induced fluorescence-dip spectroscopy method
摘要
Abstract
In order to realize the industrial application of high-current pulsed electron beam on material sur-face modification,it is necessary to monitor tiny perturbation in real-time.The electric field strength is a critical parameter understanding the characteristics of electron beams.The laser-induced fluorescence-dip spectroscopy method based on the Stark effect can realize the tiny perturbation measurement of electric fields.Therefore,Studying laser power density influence on the electric field has significant theoretical and application value for the parameter setting and result interpretation of similar electric field measurement methods.The theoretical analysis and calculation are used to obtain the relationship model between excita-tion laser power density and the test environment parameters in the tiny perturbation state of electric field measurement.Then,based on the above relationship model and theoretical calculation,the influence of excit-ation laser power density on electric field measurement is verified experimentally.The experimental results show that under the conditions that the tracer gas xenon pressure is 1.0×10-4 mbar and the electric field strength is 2 kV/cm or below,the excitation laser power density of tiny perturbations on the electric field measurement is 5 MW/cm2,which is consistent with the theoretical calculation value.The research results provide a quantitative analysis method for studying the influence of laser power density on the electric field in the laser-induced fluorescence-dip spectroscopy.They can be applied to similar electric field measurement methods,open the way for the setting of laser power density and experimental parameters,support the devel-opment of electric field measurement experiments,and effectively improve the accuracy of electric field measurement.关键词
激光暗荧光光谱/微扰测量/激光功率密度/光电离效应/场电离效应Key words
laser-induced fluorescence-dip spectroscopy/tiny perturbation measurement/laser power dens-ity/photon ionization effect/field ionization effect分类
数理科学引用本文复制引用
王桢,吕日毅,李超,陈俊锋,张曼..激光暗荧光光谱电场测量微扰计算与实验[J].中国光学（中英文）,2024,17(6):1351-1358,8.基金项目
国家重点研发计划(No.2022YFC2808101)Supported by National Key Research and Development Program of China(No.2022YFC2808101) （No.2022YFC2808101）
