Self-Focusing of Elliptical Laser Beam in Collisional Plasma and Its Effect on Stimulated Brillouin Scattering Process

被引:28
|
作者
Singh, Arvinder [1 ]
Walia, Keshav [1 ]
机构
[1] Natl Inst Technol, Dept Phys, Jalandhar, India
关键词
Elliptical laser beam; Self-focusing; Ion-acoustic wave; Back-reflectivity; Collisional plasma; PULSE; GENERATION; TARGET; WAVE;
D O I
10.1007/s10894-011-9496-y
中图分类号
TL [原子能技术]; O571 [原子核物理学];
学科分类号
0827 ; 082701 ;
摘要
This paper presents an investigation of self-focusing of elliptical laser beam in a collisional plasma and its effect on stimulated Brillouin scattering (SBS) process. The non-linearity arising through non-uniform heating leads to redistribution of carriers, which modifies the background plasma density profile in a direction transverse to pump beam axis. This modification affects the incident laser beam, ion-acoustic wave and back scattered beam. Non-linear differential equations for the beam width parameters of the pump laser beam, ion-acoustic wave and back scattered beam are set up and solved numerically. It is observed from the analysis that the focusing of waves greatly enhances the SBS back-reflectivity.
引用
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页码:531 / 537
页数:7
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