Time resolved analysis of C-2 emission from laser induced graphite plasma in helium atmosphere

被引：14

作者：

Harilal, SS

Issac, RC

Bindhu, CV

Nampoori, VPN

Vallabhan, CPG

机构：

[1] Laser Division, International School of Photonics, Cochin Univ. of Sci. and Technology

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1997年 / 36卷 / 1A期

关键词：

laser ablation; plasma; carbon clusters; time resolved spectroscopy;

D O I：

10.1143/JJAP.36.134

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report time resolved study of C-2 emission from laser produced carbon plasma in presence of ambient helium gas. The 1.06 mu m radiation from a Nd:YAG laser was focused onto a graphite target where it produced a transient plasma. We observed double peak structure in the time profile of C-2 species. The twin peaks were observed only after a threshold laser fluence. It is proposed that the faster a velocity component in the temporal profiles originates mainly due to recombination processes. The laser fluence and ambient gas dependence of the double peak intensity distribution is also reported.

引用

收藏

页码：134 / 138

页数：5

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