Multi-species temperature and number density analysis of a laser-produced plasma using dual-comb spectroscopy
Multi-species temperature and number density analysis of a laser-produced plasma using dual-comb spectroscopy
复制标题
使用双梳光谱对激光产生的等离子体进行多物种温度和数密度分析
DOI：
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发表时间：
2022
影响因子：
3.2
通讯作者：
R. Jones
中科院分区：
文献类型：
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作者：
Reagan R. D. Weeks;Yu Zhang;S. S. Harilal;M. Phillips;R. Jones
双梳光谱是一种利用吸收光谱作为多组分激光等离子体激发温度和柱密度诊断工具的新方法。对烧蚀含Nd、Gd和Fe的多元合金所产生的LPP进行了分散控制系统的研究。在530.08~535.19 nm的吸收光谱中观察到了上述三种元素的跃迁，并在S消融后的31~250 μ的7个时延中观察到了这三种元素的跃迁。用非线性回归算法对光谱进行拟合以确定峰面积，并用Boltzmann图分别确定了三种原子的激发温度和柱密度。测得的NdI和GdI的激发温度在所有的延迟时间内都表现出很好的一致性，而Fe I温度较高，并且柱密度之比随时间延迟而变化。这些观察结果是通过LPP空间平均、元素分馏和分子形成的影响来理解的，并与以前使用其他光谱技术研究LPP的工作进行了比较和背景分析。对测定的激发温度和柱密度的精密度和准确度也作了简要的讨论。
Dual-comb spectroscopy (DCS) represents a novel method of using absorption spectroscopy as a diagnostic tool for multispecies analysis of excitation temperatures and column densities in laser-produced plasmas (LPPs). DCS was performed on a LPP generated by ablating a multielement alloy containing Nd, Gd, and Fe. Transitions from all three elements were observed in absorption spectra measured from 530.08 to 535.19 nm at seven time-delays from 31 to 250 μs after ablation. The spectra were fit using a nonlinear regression algorithm to determine peak areas, and excitation temperatures and column densities were determined for the three atomic species separately using Boltzmann plots. The measured excitation temperatures of Nd I and Gd I showed good agreement at all time-delays, whereas the Fe I temperature was found to be higher, and the ratios between the column densities varied with delay. The observations are understood via effects of LPP spatial averaging, elemental fractionation, and molecular formation and are compared and contextualized with previous work studying LPPs using other spectroscopic techniques. A brief discussion of the precision and accuracy of the determined excitation temperatures and column densities is also presented.
影响因子：
6.1
作者：
Myakalwar, Ashwin Kumar;Sreedhar, S.;Barman, Ishan;Dingari, Narahara Chari;Rao, S. Venugopal;Kiran, P. Prem;Tewari, Surya P.;Kumar, G. Manoj
通讯作者：
Kumar, G. Manoj