Spatial-Resolved Measurement and Analysis of Extreme-Ultraviolet Emission Spectra from Laser-Produced Al Plasmas  

作　　者：曹世权 苏茂根 孙对兄 敏琦 董晨钟 

机构地区：[1]Key Laboratory of Atomic and Molecular Physics & Functional Material of Gansu Province,College of Physics and Electronic Engineering,Northwest Normal University [2]Joint Laboratory of Atomic and Molecular Physics,Northwest Normal University and Institute of Modern Physics of Chinese Academy of Sciences

出　　处：《Chinese Physics Letters》2016年第4期76-79,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 11064012,11364037 and 11564037;the Basic Scientific Foundation of Higher Learning of Gansu Province;the Natural Science Foundation of Gansu Province under Grant Nos 1308RJZA166 and 1104WCGA186

摘　　要：Extreme ultraviolet emission from laser-produced A1 plasma is experimentally and theoretically investigated. Spatial-evolution emission spectra are measured by using the spatio-temporally resolved laser produced plasma technique. Based on the assumptions of a normalized Boltzmann distribution among the excited states and a steady-state collisional-radiative model, we succeed in reproducing the spectra at different detection positions, which are in good agreement with experiments. The decay curves about the electron temperature and electron density, as well as the fractions of individual A1 ions and average ionization stage with increasing the detection distance are obtained by comparison with the experimental measurements. These parameters are critical points for deeply understanding the expanding and cooling of laser produced plasmas in vacuum.Extreme ultraviolet emission from laser-produced A1 plasma is experimentally and theoretically investigated. Spatial-evolution emission spectra are measured by using the spatio-temporally resolved laser produced plasma technique. Based on the assumptions of a normalized Boltzmann distribution among the excited states and a steady-state collisional-radiative model, we succeed in reproducing the spectra at different detection positions, which are in good agreement with experiments. The decay curves about the electron temperature and electron density, as well as the fractions of individual A1 ions and average ionization stage with increasing the detection distance are obtained by comparison with the experimental measurements. These parameters are critical points for deeply understanding the expanding and cooling of laser produced plasmas in vacuum.

关 键 词：of on is AL from in 

分 类 号：TN249[电子电信—物理电子学] O53[理学—等离子体物理]