Plasma properties of a laser-ablated aluminum target in air

被引：33

作者：

Ying, MJ ^{[1
]}

Xia, YY

Sun, YM

Zhao, MW

Ma, YC

Liu, XD

Li, YF

Hou, XY

机构：

[1] Shandong Univ, Dept Optoelect, Shandong 250100, Peoples R China

[2] Shandong Univ, Dept Phys, Shandong, Peoples R China

来源：

LASER AND PARTICLE BEAMS | 2003年 / 21卷 / 01期

关键词：

laser-ablated aluminum; optical emission; electron density;

D O I：

10.1017/S0263034603211186

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The optical emission spectra of the plasma generated by a 1.06-mum Nd:YAG laser irradiation of Al target in air was recorded and analyzed in a spatially resolved manner. Electron temperatures and densities in the plasma were obtained using the relative emission intensities and the Stark-broadened linewidths of Al(I) emission lines, respectively. The dependence of the electron density and temperature on the distance from the target surface and on the laser irradiance were manifested. We also discussed how the air takes part in the plasma evolution process and confirmed that the ignition of the air plasma was by the collisions between the energetic electrons and the nitrogen atoms through a cascade avalanche process.

引用

页码：97 / 101

页数：5

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