The effect of ambient pressure on laser-induced plasmas in air

被引：100

作者：

Glumac, Nick ^{[1
]}

Elliott, Greg ^{[1
]}

机构：

[1] Univ Illinois, Urbana, IL 61801 USA

来源：

OPTICS AND LASERS IN ENGINEERING | 2007年 / 45卷 / 01期

关键词：

laser spark; pressure; LIBS;

D O I：

10.1016/j.optlaseng.2006.04.002

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A detailed investigation of the effect of ambient pressure in the range of 0.1 to 1.0 atm on the size, temperature, electron number density, and fraction of laser energy absorbed in a laser-induced plasma in air has been conducted. As pressure is reduced the size of the plasma, its electron number density, its peak emission intensity, and the fraction of incident laser energy that is absorbed are all found to decrease significantly. The temporal temperature profile in the plasma and the fraction of the absorbed laser energy that is converted to thermal energy in the plasma remain constant, at least down to 0.2 atm. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：27 / 35

页数：9

共 10 条

[1]

[Anonymous], 2003, 20030525 AIAA

[2]

Bergel'son V. I., 1975, SOV J PLASMA PHYS, V1, P498

[3] Laser propagation and energy absorption by an argon spark [J].