激光诱导Ni等离子体电子温度与电子密度的时空演化特性研究  

Research on space-time evolving feature of laser-induced Ni plasma′s electron temperature and electron density

作　　者：孙贯成[1] 刘欢欢[1] 李永大[1] 

机构地区：[1]长春理工大学理学院,吉林长春130022

出　　处：《激光与红外》2010年第9期941-944,共4页Laser & Infrared

摘　　要：在实验上通过测定原子谱线的相对强度和Stark加宽、线移,计算了激光诱导Ni等离子体的电子温度和电子密度,通过改变光谱信号与激光脉冲之间的延迟时间及移动成像透镜的位置,研究电子密度和温度这两个重要参数与延时、空间位置之间的关系。实验结果表明:电子温度及电子密度与延时、空间位置密切相关,在时间分辨中,等离子体的电子温度和电子密度与延迟时间都成指数衰减;在空间分辨中,电子温度和电子密度与距靶面空间距离都呈Lorentz线型。Laser-induced Ni plasma′s electron temperature and electron density have been calculated through the determination of atomic line′s relative intensity,as well as the broadening and line-shifting of Stark.The relationship between time delay,spatial location and the two important parameters,i.e.electron temperature and electron density have been studied through the changing of the delayed time between spectrum signal and laser pulse,as well as the changing of shifting imaging lens′ location.The results show that the electron temperature and the electron density correlate closely with the time delay and the spatial location.In time resolution,the plasma′s electron temperature and electron density decrease exponentially with the delay time.In space resolution,the electron temperature and the electron density observe Lorentz rule with the distance from the targeting point.

关 键 词：等离子体 电子温度 电子密度 

分 类 号：TN241[电子电信—物理电子学]