高气压Ar对激光诱导Al等离子体辐射特性的影响  

Effects of Argon Atmosphere at High Pressure on Radiation Characteristic of Laser-induced Al Plasmas

作　　者：史金超[1] 陈金忠[1] 刘云山[1] 

机构地区：[1]河北大学物理科学与技术学院,河北保定071002

出　　处：《应用激光》2005年第6期401-404,共4页Applied Laser

基　　金：河北省科技厅攻关项目(02820180D)资助

摘　　要：用高能量钕玻璃激光器(0～25J)烧蚀Al靶产生等离子体.实验中测量了Ar气气压在0.1～1.0MPa范围内,等离子体发射光谱的谱线强度、半宽度、信背比以及等离子体的电子温度和电子密度随气压的变化.结果表明,随着环境气体压强的升高,等离子体的空间体积被压缩,电子温度和电子密度增大,辐射强度有明显的增强.Aluminum plasma was induced with a high energy neodymium glass laser（0-25J） beam ablating Al target. Both the line intensity,half width,signal-to-background ratio of the emission spectra and the electron temperature,electron density of the plasma was mearsured in Ar atmosphere at 0.1-1.0MPa pressure. The experimental results show that the volume of the plasma is compressed, the electron temperature and density increased, the radiation intensity enhanced significantly when pressure raise.

关 键 词：激光诱导等离子体 高气压 谱线强度 电子温度 电子密度 

分 类 号：TN244[电子电信—物理电子学] O536[理学—等离子体物理]