Nonlinear Coupling between Drift Wave and Externally Excited Ion-Acoustic Wave

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概要

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• Effects of an alternating electric field on collisionless drift waves driven by density gradient are investegated theoretically. The alternating electric field is applied along the magnetic field, the frequency of which is close to that of the drift wave. It is assumed that the electron temperature is much greater than that of ions. The applied field is treated as a perturbation like ion-acoustic wave. The contribution of the "nonlinear Landau damping" due to the coupling between the drift and ion-acoustic waves to the damping coefficient, as well as the effect of the frequency shift, is calculated. It is found that the unstable drift waves can be stabilized for the suitable applied intensities. The damping mechanism is caused mainly by the increasing of the frequency of the drift wave. The results are compared with experimental observations.

• 社団法人日本物理学会の論文
• 1971-07-05

著者

• Okamoto Masao

  Department Of Nuclear Engineering Faculty Of Engineering Kyoto University

• Okamoto Masao

  Department Of Nuclear Engineering Kyoto University:(present Address) Department Of Precision Enginee

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