不同背景气体及压强对激光Al等离子体动力学演化特性的影响  

Effects of different ambient gases and pressures on the evolutionary properties of laser-produced Al plasma

作　　者：李越 敏琦 符彦飙 胡素素 陶倩倩 LI Yue;MIN Qi;FU Yan-biao;HU Su-su;TAO Qian-qian(Key Laboratory of Atomic and Molecular Physics and 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）》2024年第1期39-45,共7页Journal of Northwest Normal University(Natural Science)

基　　金：西北师范大学重点培育项目(NWNU-LKZD2021-02);兰州市人才创新创业项目(2020-RC-143)。

摘　　要：从实验和理论两方面细致研究了空气、氦气和氩气3种背景气体在压强为105 Pa、500 Pa和5×10^(-4) Pa下激光Al等离子体的动力学演化特性.实验方面,搭建了高时间分辨的瞬态成像测量装置,获得了不同背景气体及压强下Al等离子体羽的瞬态图像.理论方面,利用辐射流体力学模拟程序对Al等离子体的动力学演化过程进行了模拟,并对实验获得的等离子体羽尺寸等参数进行拟合.结果表明,不同背景气体及压强对Al等离子体的约束作用不同,原子序数越大、压强越大的气体,对等离子体的约束能力越强.The kinetic evolution of the laser-produced plasma(LPP)under three ambient gases(air,helium and argon)and three ambient pressures(eg.105 Pa,500 Pa and 5×10^(-4) Pa)has been studied in detail from both experimental and theoretical aspects.Experimentally,a high time-resolved transient imaging measurement device was built to obtain transient images of the Al plasma plume in the 180~850 nm band for different ambient gases and pressures.Theoretically,the kinetic evolution of the Al plasma was simulated using a radiation hydrodynamic simulation program,and the experimentally obtained Al plasma plume size were fitted.The results show that different ambient gases and pressures have different confinement effects on the Al plasma,and the larger the atomic number and the higher the pressure,the stronger the confinement ability to the Al plasma.

关 键 词：激光等离子体 瞬态成像法 辐射流体力学模拟程序 

分 类 号：TN24[电子电信—物理电子学]