脉冲激光烧蚀空气中金属靶产生等离子体的性质  

THE PLASMA PROPERTIES OF LASER ABLATED METAL TARGET IN AIR

作　　者：王象泰[1] 满宝元[1] 王公堂[1] 卓壮[1] 王军[1] 廖源[1] 许炳章[2] 夏曰源[2] 梅良模[2] 

机构地区：[1]山东师范大学物理系 [2]山东大学物理系

出　　处：《原子与分子物理学报》1996年第3期273-278,共6页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金资助项目

摘　　要：当１．０６μｍ和脉宽为１０ｎｓ、功率密度为９．３×１０９ｗ／ｃｍ２的脉冲激光作用在大气中的金属靶面上时，将产生等离子体。研究了它从２００ｎｍ～８８０ｎｍ间的空间、时间分辨谱，用飞行时间诊断方法得到了等离子体中被激发的核素的速度。Time-resolved emission spectrum from the plasma produced by 1.06μm,10ns pulsed-laser irradiation of titanium alloy targets in air at a flux of 9.3×10 9 Wcm -2 was analyzed in the wave-length range of 200.0nm to 880.0nm.From the evolutions of the specific spectrum lines of N(Ⅱ),Ti(I)and Fe(I), the velocities of N +ions and excited neutral Ti and Fe atoms have been obtained using a time-of-flight diagnostic method.the electron temperatures were deduced using the relative emission intensities of N(Ⅱ)and Fe(I)isolated spectrum lines,and an electron number density was determined from the Stark-broadened line of the N(Ⅱ)line at wave-length λ=399.5nm.

关 键 词：激光烧蚀 等离子体 时间分辨谱 金属靶 

分 类 号：O531[理学—等离子体物理]