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从形成动态的角度看,激光诱导等离子体的声学特征

Wendong Wu, Shu Chai, Yuegui Zhou

|December 18, 2023

概括

在激光诱导分解光谱学 (LIBS) 中,声信号显示出明显的等离子体动态. 在100mJ左右的能量沉积过渡会改变等离子体的形成,影响声波特征并帮助LIBS测量.

科学领域:

物理物理学物理
频谱学是一种光谱学.
声学声学在声学方面

背景情况:

激光诱导分解光谱 (LIBS) 通过声信号分析来增强.
了解激光诱导等离子体 (LIP) 形成动态对于优化LIBS至关重要.

研究的目的:

为了研究不同能量沉积的LIP的声学特征.
为了将声信号与LIP形成动态相关联.
探索声学测量的潜力,以解释LIBS中的等离子体行为.

主要方法:

对不同能量沉积水平的声压和LIP持续时间的分析.
检查自我发射光谱和图像,以了解等离子体的形成.
声信号的频域分析.
声波和辐射信号之间的相关性分析.

主要成果:

在声压和持续时间方面确定了两个不同的区域,过渡点在100mJ.
100mJ以上,等离子体温度和电子密度和,导致等离子体大小增加和声波传播发生变化.
100mJ以上的等离子形成动态的变化显著影响了声信号和辐射信号之间的相关性.

结论:

声信号分析为LIP形成动态提供了洞察力.
血行为的明显转变发生在100mJ左右的能量沉积.
声学测量可以作为一个有价值的工具来解释在声学辅助LIBS应用程序中的等离子体动力学.

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