激光诱导硬币等离子体特征参数的研究  

Study of characteristic parameters of laser-induced coin plasma

作　　者：赵小侠[1] 罗文峰 贺俊芳[1] 杨森林[1] 成桢[1] 李姝丽[1] 李院院[1] ZHAO Xiao-Xia;LUO Wen-Feng;HE Jun-Fang;YANG Sen-Lin;CHENG Zhen;LI Shu-Li;LI Yuan-Yuan(The Key Laboratory for Surface Engineering and Remanufacturing of Shaanxi Province, Xi’an University, Xi’an 710065, China;School of Electronic Engineering, Xi’an University of Posts and Telecommunications, Xi’an 710121, China)

机构地区：[1]西安文理学院陕西省表面工程与再制造重点实验室,西安710065 [2]西安邮电大学电子工程学院,西安710121

出　　处：《原子与分子物理学报》2018年第6期987-992,共6页Journal of Atomic and Molecular Physics

基　　金：西安市科技计划项目(CXY1443WL01;CXY1443WL02;2017CGWL14;2017CGWL18);国家自然科学基金(61401356);陕西省自然科学基础研究计划项目(2017JM6040);陕西省教育厅专项研究计划项目(16JK2199)

摘　　要：利用1064 nm调Q Nd:YAG激光诱导产生壹圆硬币等离子体,为了提高等离子体特征参数的求解精度,利用改进型迭代Boltzmann算法,建立镍原子谱线(225.47 nm、303.19 nm、304.50 nm、323.30 nm、339.29 nm、491.84 nm、495.32 nm、500.03 nm、501.76 nm)的Boltzmann图,计算得到硬币等离子体电子温度为28144 K.通过测量镍原子谱线341.48 nm的Stark展宽,得到硬币等离子体的电子数密度为8.6×1017cm-3.基于实验结果,证明激光诱导硬币等离子体满足局部热力学平衡模型.The coin plasma is produced by focusing the1064nm Q-switched Nd:YAG laser.The plasma temperature28144K is inferred using the improved iterative Boltzmann plot method with nine Ni lines(225.47nm,303.19nm,304.50nm,323.30nm,339.29nm,491.84nm,495.32nm,500.03nm,501.76nm).The electron number density8.6×10^17cm^-3is obtained from the Stark broadening of Ni I341.48nm.Based on the experimental results,the laser-induced coin plasma is verified to be in local thermodynamic equilibrium.

关 键 词：激光诱导击穿光谱 等离子体 电子温度 电子数密度 

分 类 号：O433[机械工程—光学工程]