Time-resolved spectroscopy of collinear femtosecond and nanosecond dual-pulse laser-induced Cu plasmas

作     者：Qiuyun WANG Hongxia QI Xiangyu ZENG Anmin CHEN Xun GAO Mingxing JIN 王秋云;齐洪霞;曾祥榆;陈安民;高勋;金明星

作者机构：Institute of Atomic and Molecular PhysicsJilin UniversityChangchun 130012People's Republic of China School of ScienceChangchun University of Science and TechnologyChangchun 130022People's Republic of China 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2021年第23卷第11期

页      面：121-127页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 

基　　金：support of National Natural Science Foundation of China(Nos.11674128,11674124 and 11974138) the Scientific and Technological Research Project of the Education Department of Jilin Province,China(No.JJKH20200937KJ) 

主　　题：laser-induced breakdown spectroscopy fs+ns and ns+fs dual-pulse time-resolved spectroscopy plasma temperature electron density 

摘      要：In this paper,we investigate the time-resolved spectroscopy of collinear femtosecond(fs)and nanosecond(ns)dual-pulse(DP)laser-induced plasmas.A copper target was used as an experimental sample,and the fs laser was considered as the time zero reference *** interpulse delay between fs and ns laser beams was 3μ***,we compared the time-resolved peak intensities of Cu(I)lines from Cu plasmas induced by fs+ns and ns+fs DP lasers with collinear *** results showed that compared with the ns+fs DP,the fs+ns DP laser-induced Cu plasmas had stronger peak intensities and longer ***,we calculated time-resolved plasma temperatures using the Boltzmann plot with three spectral lines at Cu(I)510.55,515.32 and 521.82 *** addition,time-resolved electron densities were calculated based on Stark broadening with Cu(I)line at 521.82 *** was found that compared with ns+fs DP,the plasma temperatures and electron densities of the Cu plasmas induced by fs+ns DP laser were ***,we observed images of ablation craters under the two experimental conditions and found that the fs+ns DP laser-produced stronger ablation,which corresponded to stronger plasma emission.