原子与分子物理学报2009，Vol.26Issue(5)：864-868,5.DOI:10.3969/j.issn.1000-0364.2009.05.017
离焦量对空气中激光诱导铜等离子体光谱特性的影响
Influence of Defocusing Distance on the Laser-Induced Cu Plasma in Air
摘要
Abstract
The plasma spectra have been measured with a pulsed Nd:YAG laser which induced plasma from a metal copper target.Varying defocusing distance the influence of the relative intensity and spectral structure in various laser focusing distances from the target is studied.Space distribution characters of electron temperature are measured with defocusing distances at 1 mm before target,0 mm on the sample surface,and 2 mm back the sample.At the same time we analyze the characteristics and mechanism of the plasma spectra.The results show that the spectral structure,spectral intensity and electron temperature prominently depend on the defocusing distances.The focusing position 2 mm back the sample surface can be found that produces the maximum of copper atom spectra intensity and the electron temperature maximum.And the phenomena that the spectral intensities fall off at the the focusing position 0.5 mm and 1.0 mm below the sample surface can be interpreted by the shielding effect.关键词
激光产生等离子体/发射光谱/电子温度Key words
laser-produced plasma/ emission spectra/ electron temperature分类
数理科学引用本文复制引用
乔红贞,苏茂根,袁萍,申晓志,郭逸潇,赵学燕..离焦量对空气中激光诱导铜等离子体光谱特性的影响[J].原子与分子物理学报,2009,26(5):864-868,5.基金项目
国家自然科学基金(40475007) （40475007）
西北师范大学科技创新工程项目(NWNU-KJCXGC-03-21) （NWNU-KJCXGC-03-21）
