Interaction of near-IR laser radiation with plasma of a continuous optical discharge

被引：18
|
作者：
Zimakov, V. P. [1 ]
Kuznetsov, V. A. [1 ]
Solovyov, N. G. [1 ]
Shemyakin, A. N. [1 ]
Shilov, A. O. [1 ]
Yakimov, M. Yu. [1 ]
机构：
[1] Russian Acad Sci, A Ishlinsky Inst Problems Mech, Pr Vernadskogo 101-1, Moscow 119526, Russia
来源：
PLASMA PHYSICS REPORTS | 2016年 / 42卷 / 01期
基金：
俄罗斯基础研究基金会;
关键词：
Laser Radiation; Xenon; Plasma Physic Report; Local Thermodynamic Equilibrium; Threshold Power;
D O I：
10.1134/S1063780X15110100
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The interaction of 1.07-mu m laser radiation with plasma of a continuous optical discharge (COD) in xenon and argon at a pressure of p = 3-25 bar and temperature of T = 15 kK has been studied. The threshold power required to sustain COD is found to decrease with increasing gas pressure to P (t) < 30 W in xenon at p > 20 bar and to P (t) < 350 W in argon at p > 15 bar. This effect is explained by an increase in the coefficient of laser radiation absorption to 20-25 cm(-1) in Xe and 1-2 cm(-1) in Ar due to electronic transitions between the broadened excited atomic levels. The COD characteristics also depend on the laser beam refraction in plasma. This effect can be partially compensated by a tighter focusing of the laser beam. COD is applied as a broadband light source with a high spectral brightness.
引用
收藏
页码：68 / 73
页数：6
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