Ideal laser-beam propagation through high-temperature ignition hohlraum plasmas

被引：47

作者：

Froula, D. H. ^{[1
]}

Divol, L. ^{[1
]}

Meezan, N. B. ^{[1
]}

Dixit, S. ^{[1
]}

Moody, J. D. ^{[1
]}

Neumayer, P. ^{[1
]}

Pollock, B. B. ^{[1
]}

Ross, J. S. ^{[1
]}

Glenzer, S. H. ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.98.085001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate that a blue (3 omega, 351 nm) laser beam with an intensity of 2x10(15) W cm(-2) propagates nearly within the original beam cone through a millimeter scale, T-e=3.5 keV high density (n(e)=5x10(20) cm(-3)) plasma. The beam produced less than 1% total backscatter at these high temperatures and densities; the resulting transmission is greater than 90%. Scaling of the electron temperature in the plasma shows that the plasma becomes transparent for uniform electron temperatures above 3 keV. These results are consistent with linear theory thresholds for both filamentation and backscatter instabilities inferred from detailed hydrodynamic simulations. This provides a strong justification for current inertial confinement fusion designs to remain below these thresholds.

引用

页数：4

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