激光聚变等离子体中饱和离子波的汤姆逊散射测量

Thomson scattering measurements of saturated ion waves in laser fusion plasmas.

作者信息

Glenzer S H, Divol L M, Berger R L, Geddes C, Kirkwood R K, Moody J D, Williams E A, Young P E

机构信息

Lawrence Livermore National Laboratory, University of California, CA 94551, USA.

出版信息

Phys Rev Lett. 2001 Mar 19;86(12):2565-8. doi: 10.1103/PhysRevLett.86.2565.

DOI:10.1103/PhysRevLett.86.2565

PMID:11289981

Abstract

We have measured the characteristics of saturated ion-acoustic waves in inertial confinement fusion plasmas. A 263-nm probe laser has been applied to simultaneous Thomson scatter on both ion-acoustic waves excited by thermal electrostatic fluctuations and by stimulated Brillouin scattering of a kilojoule laser beam of varying intensity. The Thomson scattering spectra show saturated ion-wave amplitudes for intensities above 5x10(14) W cm(-2) consistent with three dimensional nonlinear wave modeling.

摘要

我们已经测量了惯性约束聚变等离子体中饱和离子声波的特性。一台263纳米的探测激光器被用于同时对由热静电涨落激发的离子声波以及由强度可变的千焦级激光束的受激布里渊散射激发的离子声波进行汤姆逊散射测量。汤姆逊散射光谱显示，对于强度高于5×10¹⁴瓦/厘米²的情况，饱和离子波振幅与三维非线性波动模型一致。