Controlling stimulated brillouin backscatter with beam smoothing in weakly damped systems

被引：18

作者：

Divol, Laurent ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.99.155003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We derive an analytical estimate of the effect of temporal smoothing of laser beams on stimulated Brillouin scattering (SBS) in a regime relevant to indirect drive ignition. We predict a strong reduction of SBS in the gold plasma expanding from the Hohlraum wall with temporal smoothing. This is a new regime far above threshold where the time to reach convective saturation allows for an effective contrast reduction of the beam intensity driving the instability. This result agrees with three dimensional simulations. Polarization smoothing is shown to double the effective bandwidth.

引用

页数：4

共 16 条

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