Emission characteristics and dynamics of C2 from laser produced graphite plasma
Emission characteristics and dynamics of C2 from laser produced graphite plasma
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激光产生石墨等离子体的 C2 发射特性和动态
DOI：
10.1063/1.365482
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发表时间：
1997
影响因子：
3.2
通讯作者：
C. Vallabhan
中科院分区：
文献类型：
--
作者：
S. S. Harilal;R. Issac;C. Bindhu;V. Nampoori;C. Vallabhan
利用时间和空间分辨等离子体诊断技术研究了氦气氛中激光烧蚀石墨羽流的发射特性。采用时间分辨发射光谱技术揭示了烧蚀过程中不同物质喷射的速度分布。在较低的激光能量密度值，只有一个缓慢传播的成分C2被视为。在高注量下，C2的发射在时间上显示出双峰分布。在较高的激光能量密度下，由于多体复合而形成了具有减小的时间延迟的发射峰，从而给出了能量峰。还观察到，这些双峰在距离目标大于16 mm处被修改为三峰飞行时间分布。C2发射中出现多个峰主要是由于C2物种的不同形成机制造成的延迟。快峰的速度分布随距离的增加呈现振荡特征。
The emission features of laser ablated graphite plume generated in a helium ambient atmosphere have been investigated with time and space resolved plasma diagnostic technique. Time resolved optical emission spectroscopy is employed to reveal the velocity distribution of different species ejected during ablation. At lower values of laser fluences only a slowly propagating component of C2 is seen. At high fluences emission from C2 shows a twin peak distribution in time. The formation of an emission peak with diminished time delay giving an energetic peak at higher laser fluences is attributed to many body recombination. It is also observed that these double peaks get modified into triple peak time of flight distribution at distances greater than 16 mm from the target. The occurrence of multiple peaks in the C2 emission is mainly due to the delays caused from the different formation mechanism of C2 species. The velocity distribution of the faster peak exhibits an oscillating character with distance from the ...
使用石墨进行激光烧蚀推进的分子动力学分析
DOI：
--
发表时间：
2021
期刊：
影响因子：
--
作者：
K. Sato;C. Kato;M. Takahashi;and N. Ohnishi
通讯作者：
and N. Ohnishi