真空中铝锡合金激光等离子体的时间演化研究  

Study on time evolution of Al-Sn alloy laser-produced plasmas in vacuum

作　　者：符彦飙 杜颖 FU Yan-biao;DU Yin(Key Laboratory of Atomic and Molecular Physics&Functional Material of Gansu Province,College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070,Gansu,China)

机构地区：[1]西北师范大学物理与电子工程学院,甘肃省原子分子物理与功能材料重点实验室,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2023年第1期66-71,共6页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(12064040,11904293,11874051);甘肃省创新基础研究群体基金资助项目(20JR5RA541);西北师范大学重点培养资助项目(NWNU-LKZD2021-02)。

摘　　要：利用时间分辨发射光谱法测量了真空环境中激光Al-Sn合金等离子体时间演化光谱,结合基于流体动力学方程和辐射输运方程的多元素激光等离子体辐射流体动力学模型及程序,模拟了Al-Sn合金等离子体在真空中的膨胀演化,实现了不同电荷态Al、Sn离子在等离子体演化过程中离子密度和等离子体温度的空间分布诊断.结果表明,理论模拟的谱线强度及其时间演化规律与实验结果符合较好,理论重构的不同时间延迟下离子密度和等离子体温度的空间分布图像可以直观地呈现多元素等离子体中不同电荷态离子在等离子体中的演化过程,预期可为多元素情形下的激光等离子体辐射特性及其应用提供帮助.A series of time evolution spectra of laser-produced Al-Sn alloy plasmas in vacuum were measured using a time-resolved emission spectroscopy.Combined with the multi-element laser-produced plasma radiation hydrodynamics model developed based on the hydrodynamics equations and radiation transport equation,the expansion evolution of Al-Sn alloy plasma was simulated,and spatial distribution of ion density of Al and Sn ions and plasma temperature during plasma evolution in vacuum were obtained.The results show that the theoretical simulated spectral line intensity and its time evolution law are in good agreement with the experimental results.The theoretical reconstructed spatial distribution images of ion density and plasma temperature at different time delays can intuitively show the evolution process of different charged ions in multi-element plasma,which is expected to provide help forthe study of radiation characteristics and applications of laser-produced plasmas in the multi-element case.

关 键 词：激光等离子体 辐射流体动力学模型 等离子体温度 电子密度 

分 类 号：TN24[电子电信—物理电子学]