Expansion dynamics of laser ablated carbon plasma plume in helium ambient

被引：51

作者：

Harilal, SS ^{[1
]}

机构：

[1] Cochin Univ Sci & Technol, Int Sch Photon, Cochin 682022, Kerala, India

来源：

APPLIED SURFACE SCIENCE | 2001年 / 172卷 / 1-2期

关键词：

laser produced plasma; emission spectroscopy; laser ablation; plasma expansion;

D O I：

10.1016/S0169-4332(00)00837-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Time resolved emission spectroscopic measurements on a plasma plume generated by pulsed laser ablation of carbon in helium ambient atmosphere have been performed. Temporal profiles of electronically excited C-2 species show a twin peak distribution beyond a threshold laser irradiance. The emission features of C-2 species are found to be significantly influenced by the ambient helium atmosphere. It is observed that the helium ambient pressure and laser irradiance have opposite effects on the expansion dynamics of C-2 species. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：103 / 109

页数：7

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