A comparative study of enhanced emission in double pulse laser induced breakdown spectroscopy

被引：30
作者：
Ahmed, Rizwan [1 ]
Baig, M. A. [1 ,2 ]
机构：
[1] Natl Ctr Phys, Islamabad, Pakistan
[2] Quaid I Azam Univ, Atom & Mol Phys Lab, Islamabad 45320, Pakistan
来源：
OPTICS AND LASER TECHNOLOGY | 2015年 / 65卷
关键词：
Cu emission; Electron temperature; Collinear and orthogonal re-heating dual pulse LIBS; INDUCED PLASMA SPECTROSCOPY; BEAM GEOMETRY; LIBS; TIME; ABLATION; PLUME; SPECTROMETRY; SINGLE; SPARK; 2ND;
D O I：
10.1016/j.optlastec.2014.07.011
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We are presenting a comparative study of laser induced breakdown spectroscopy (LIBS) of copper, in single pulse and dual pulse collinear and orthogonal (re-heating) configurations, using fundamental (1064 nm) and second harmonics (532 nm) of two Nd:YAG lasers. The double pulse collinear configuration yields about fifty times and the orthogonal (re-heating) configuration yields fifteen times, signal intensity enhancement in the neutral copper lines. The difference in emission enhancements in both LIBS techniques (Collinear and orthogonal double pulse) provides an experimental evidence about the enhancement mechanism in double pulse LIBS. The effect of inter pulse delay between the two laser pulses and the ratio of their pulse energies in the double pulse spectra are reported. The variation of electron temperature with different interpulse delays, different laser pulse energies ratio and along the plume axis has been studied. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：113 / 118
页数：6
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