Ar辅助确定Al等离子体电子温度  

Electron Temperature of Al Plasma Estimated with Ar

作　　者：李尊营[1] 刘复义[1] 

机构地区：[1]临沂师范学院物理系,山东临沂276005

出　　处：《光谱学与光谱分析》2004年第2期132-134,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金 ( 699780 11)资助项目

摘　　要：用Ar气作保护气时 ,Nd :YAG脉冲激光烧蚀Al靶 ,将诱发Ar气电离 ,并产生丰富的Ar离子谱线辐射。文章根据Ar离子谱线辐射信息 ,分析了ArⅡ 385 0 5 7,ArⅡ 386 85 3,ArⅡ 4 0 4 2 91 ,ArⅡ 4 0 7 2 0 1nm等 4条谱线的时间分辨行为 ,计算了Al等离子体的电子温度。结果发现 :Al等离子体的电子温度约 1 5 0 0 0～2 2 0 0 0K ,随延迟时间的增加 。Protected with Ar, it would induce atom Ar breakdown to ablate aluminum target with a pulsed Nd:YAG laser beam. Further more, a lot of Ar + ionic characteristic lines radiation appeared accompanying the aluminum plasma emission. In this work, based on the Ar + ionic characteristic lines radiation, we analyzed time resolved behavior of four Ar + ionic characteristic lines Ar Ⅱ 385 057, Ar Ⅱ 386 853, Ar Ⅱ 404 291 and Ar Ⅱ 407 201 nm, respectively. Electron temperature of aluminum plasma in the stage of ionic lines emission was approximately calculated. As a result, in this stage, the electron temperature ranged from 15 000 to 22 000 K, and decreased successively with the delay time increasing. Compared with other similar works, we found that our results agreed with many similar estimations.

关 键 词：铝等离子体 电子温度 铝气 激光烧蚀 离子谱线辐射 局域热平衡 辐射跃迁几率 

分 类 号：O53[理学—等离子体物理]