Parametric excitation of a lower‐hybrid drift wave in the ionosphere

1995 ◽  
Vol 2 (12) ◽  
pp. 4617-4620
Author(s):  
B. K. Sawhney ◽  
V. K. Tripathi ◽  
S. V. Singh
Keyword(s):  
Parametric Excitation ◽  
Lower Hybrid ◽  
Drift Wave

Anomalous absorption of a radio wave in the ionosphere

1993 ◽  
Vol 50 (3) ◽  
pp. 403-412 ◽  
Author(s):  
V. K. Tripathi ◽  
B. K. Sawhney ◽  
S. V. Singh
Keyword(s):  
Electric Field ◽  
Radio Wave ◽  
Density Fluctuation ◽  
Langmuir Wave ◽  
Lower Hybrid ◽  
Anomalous Absorption ◽  
Absorption Mechanism ◽  
Drift Wave ◽  
Inhomogeneous Ionosphere ◽  
Parametric Instabilities

A radio wave transmitted into the ionosphere in the presence of a lower-hybrid drift wave excites a Langmuir wave, which is then damped by electrons, thereby heating them. This constitutes an important absorption mechanism. We evaluate the potential of the Langmuir wave and obtain an expression for the ratio Pr of the power of the Langmuir wave to that of the incident radio wave in the inhomogeneous ionosphere. It is found that the radio wave suffers an absorption of about 8% for a density fluctuation n1/n0 = 5%, but the electric field of the Langmuir wave becomes about 11.7 times that of the radio wave, which can lead to the excitation of parametric instabilities in the ionosphere.

Parametric Excitation of a Drift Wave and Associated Ion Heating by a Modulated Ion Beam

1983 ◽  
Vol 52 (5) ◽  
pp. 1609-1617 ◽  
Author(s):  
Mitsuyasu Yatsuzuka ◽  
Kikoh Satoh ◽  
Sadao Nobuhara ◽  
Kiyoshi Yatsui ◽  
Masahiro Yokoyama
Keyword(s):  
Parametric Excitation ◽  
Ion Beam ◽  
Ion Heating ◽  
Drift Wave

Parametric excitation of the drift wave by a modulated ion beam

1983 ◽  
Vol 95 (6) ◽  
pp. 293-296
Author(s):  
Mitsuyasu Yatsuzuka ◽  
Kikoh Satoh ◽  
Sadao Nobuhara ◽  
Kiyoshi Yatsui ◽  
Masahiro Yokoyama
Keyword(s):  
Parametric Excitation ◽  
Ion Beam ◽  
Drift Wave
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