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Optical emission of plasma is used to investigate the characteristics of dynamics distribution in the plume generated by ablation of a SiC sample using Nd:YAG laser. The plume expansion dynamics is characterized by time-of-flight measurement. We find that the profiles of Si(I) (390.55 nm) split into two components and the Si(II) (634.71 nm) spectra show two distinct expansion dynamics regions. The time-of-flight measurement of Si(II) (634.71 nm) under different laser irradiance conditions, from 0.236 GW/cm 2 to 1.667 GW/cm 2 , are presented and discussed.
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Chen et al. (2008) studied this question.
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