COEXISTENCE OF PARAMETRIC DECAY CASCADES AND CAVITON COLLAPSE AT SUBCRITICAL DENSITIES

被引：70

作者：

DUBOIS, DF ^{[1
]}

ROSE, HA ^{[1
]}

RUSSELL, D ^{[1
]}

机构：

[1] LODESTAR RES CORP,BOULDER,CO 80301

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.66.1970

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report results of two-dimensional numerical solutions of Zakharov's model for strong Langmuir turbulence excited by powerful electromagnetic pump waves at subcritical densities, as in hf modification of the ionosphere and laser-plasma interactions. The results show that truncated parametric decay cascades can coexist with caviton collapse for moderate pump power. A high level of ion density fluctuations, driven primarily by caviton collapse, produces energy and power spectra which are not consistent with conventional weak turbulence theory.

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页码：1970 / 1973

页数：4

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