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首页> 外文期刊>Spectrochimica Acta, Part B. Atomic Spectroscopy >Multiple structure formation and molecule dynamics in transient plasmas generated by laser ablation of graphite
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Multiple structure formation and molecule dynamics in transient plasmas generated by laser ablation of graphite

机译：激光烧蚀瞬态等离子体中的多种结构形成和分子动力学

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Transient plasmas generated by ns - laser ablation of graphite in air have been investigated by complementary optical diagnosis techniques to study complex multiple structures generated in carbon laser produced plasmas (C-LPP) during the expansion phase. The overall emission was investigated by ICCD fast camera imaging and revealed the structuring of C-LPP into four distinct structures with different evolutions. The dynamic of the C-LPP was analyzed on various expansion directions in order to understand the formation of the main CN dominant structure and of lateral "flaps" with dominant C-2 emission. The kinetic and thermal energies of the resulted atoms, ions and molecules were investigated by means of space-and time-resolved optical emission spectroscopy and using the Boltzmann plot and Stark broadening approaches. The effect of the background gas pressure on the formation of molecular carbon structures is discussed and an optimum range of working pressure which maximizes the generation of C-2 is found. Based on the acquired data a scenario for the complex carbon structures generation in C-PLL as function of the background gas is proposed.
机译：通过互补的光学诊断技术研究了NS - 激光烧蚀石墨中石墨的瞬态等离子体，以在膨胀阶段期间研究在碳激光产生的等离子体（C-LPP）中产生的复杂多结构。通过ICCD快速摄像机成像研究了整体排放，并透露了C-LPP的结构化为具有不同的演变的四种不同的结构。在各种膨胀方向上分析C-LPP的动态，以便理解主要CN主结构和横向“襟翼”的形成，具有显性C-2发射。通过空间和时间分辨的光发射光谱研究并使用Boltzmann绘图和显着的展领宽度接近所得原子，离子和分子的动力学和热能。讨论了背景气体压力对形成分子碳结构的影响，并且发现最大化C-2的产生的最佳工作压力范围。基于所获得的数据，提出了作为背景气体的功能的C-PLL中的复杂碳结构的场景。

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