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safi A, Bahreini M, Tavassoli S H. Experimental Study of Plasma Intensity enhancement mechanism in Double pulse Laser-Induced Breakdown Spectroscopy . ICOP & ICPET _ INPC _ ICOFS 2014; 20 :1045-1048
URL: http://opsi.ir/article-1-420-en.html
URL: http://opsi.ir/article-1-420-en.html
Abstract: (5267 Views)
Double pulse Laser-Induced Breakdown Spectroscopy technique significantly indicates increasing for plasma intensity of various spectral emission lines Compared to single-pulse scheme. In this paper mechanism of signal enhancement has been studied for collinear configuration of double pulse laser induced breakdown spectroscopy .In collinear configuration Both of laser beam propagation in the same direction and they are irradiated in the perpendicular direction respect to the plane of sample. For this configuration, some of the basic hypotheses that is mentioned as the main cause of increase in the radiation intensity has been studied such as a change in the mechanism of ablation, ambient pressure reduction, increasing plasma temperature. Sample is Aluminum and experiments have been carried out at atmospheric pressure.
Keywords: Ablation, Ambient pressure, collinear configuration, Double pulse LIBS, plasma temperature
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