Parametric Coupling of Two Langmuir Waves in an Inhomogeneous Plasma, : II.Stabilizing Effects Due to the Ponderomotive Force Created by an Intense Pump Field

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概要

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• Spatial behaviors of two electron Langmuir waves parametrically coupled because of the combined action of a density gradient and a high-frequency pump electric field which is uniform outside the plasma are investigated. It is shown that the effective density gradient decreases due to the electron ponderomotive force created by the space-dependent intense pump whose space-dependence is produced by the density gradient, leading to stabilizing effects on the convective-type instability treated in I, because it is excited more strongly, the greater is the density gradient. In a non-magnetized plasma with a monotonously varying density profile, any effective trapping of the instability is shown not to be expected under usual practical conditions. The scale size of the region in which the instability may spread, however, increases with the pump intensity from “smaller than the Airy characteristic length $l$” to “much larger than $l$.”

• 社団法人日本物理学会の論文
• 1976-07-15

著者

• Ikemura Tsutomu

  Department Of Physics Faculty Of Science Kyoto Unviersity

• Ikemura Tsutomu

  Department Of General Education Hannan University

関連論文

• Two Langmuir Wave Parametric Decay Instability Driven and Trapped by a Self-Trapped Electromagnetic Pump
• Parametric Coupling of Langmuir Waves in an Inhomogeneous Plasma
• Parametric Coupling of Two Langmuir Waves in an Inhomogeneous Plasma. III. : Wave Trapping by a Density Cavity
• Generation of Harmonics of the Plasma Waves Excited near Electron Cyclotron Harmonics
• Parametric Coupling of Two Langmuir Waves in an Inhomogeneous Plasma, : II.Stabilizing Effects Due to the Ponderomotive Force Created by an Intense Pump Field

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