Effect of a high-frequency field on the reflection of ion acoustic waves from the sheath at a grid

1991 ◽  
Vol 19 (4) ◽  
pp. 612-618 ◽  
Author(s):  
L.W. Schott
Keyword(s):  
Acoustic Waves ◽  
High Frequency ◽  
High Frequency Field ◽  
Ion Acoustic Waves ◽  
Frequency Field ◽  
Ion Acoustic

scholarly journals HF-induced airglow at magnetic zenith: theoretical considerations

2005 ◽  
Vol 23 (1) ◽  
pp. 47-53 ◽  
Author(s):  
E. V. Mishin ◽  
W. J. Burke ◽  
T. Pedersen
Keyword(s):  
Research Program ◽  
Acoustic Waves ◽  
High Frequency ◽  
Theoretical Framework ◽  
Green Line ◽  
Ion Acoustic Waves ◽  
Heating Facility ◽  
Ion Acoustic ◽  
Theoretical Considerations ◽  
Magnetic Zenith

Abstract. Observations of airglow at 630nm (red line) and 557.7nm (green line) during HF modification experiments at the High Frequency Active Auroral Research Program (HAARP) heating facility are analyzed. We propose a theoretical framework for understanding the generation of Langmuir and ion acoustic waves during magnetic zenith injections. We show that observations of HF-induced airglow in an underdense ionosphere as well as a decrease in the height of the emitting volume are consistent with this scenario.

Influence of High Frequency Electric Field on the Dispersion of Ion-Acoustic Waves in Plasma

1981 ◽  
Vol 36 (1) ◽  
pp. 17-22
Author(s):  
A. Turky ◽  
M. Čerček ◽  
R. Tavzes J. Stefan
Keyword(s):  
Electric Field ◽  
Acoustic Waves ◽  
High Frequency ◽  
Wave Dispersion ◽  
Plasma Stream ◽  
Ion Acoustic Waves ◽  
Ion Acoustic Wave ◽  
High Frequency Electric Field ◽  
Ion Acoustic ◽  
Frequency Electric Field

The modification of the ion-acoustic wave dispersion under the action of a high frequency electric field was studied experimentally, the wave propagating along and against the plasma stream. The frequency of the field amounted to approximately half the electron plasma frequency. It was found that the phase velocity of the ion wave and the plasma drift velocity decrease as the effective high frequency field power increases

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