Stability of Electrostatic Electron Cyclotron Waves in a Multi-Ion Plasma
Autor: | Samuel George, G. Renuka, Chandu Venugopal, Noble P. Abraham, G. Sreekala, Sijo Sebastian |
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Rok vydání: | 2014 |
Předmět: |
Physics
Waves in plasmas Cyclotron resonance Astronomy and Astrophysics Ion acoustic wave Lower hybrid oscillation Electron cyclotron resonance Fourier transform ion cyclotron resonance Physics::Plasma Physics Space and Planetary Science Physics::Space Physics Earth and Planetary Sciences (miscellaneous) Electromagnetic electron wave Atomic physics Ion cyclotron resonance |
Zdroj: | Earth, Moon, and Planets. 111:115-125 |
ISSN: | 1573-0794 0167-9295 |
Popis: | We have studied the stability of the electrostatic electron cyclotron wave in a plasma composed of hydrogen, oxygen and electrons. To conform to satellite observations in the low latitude boundary layer we model both the ionic components as drifting perpendicular to the magnetic field. Expressions for the frequency and the growth rate of the wave have been derived. We find that the plasma can support electron cyclotron waves with a frequency slightly greater than the electron cyclotron frequency ω ce ; these waves can be driven unstable when the drift velocities of both the ions are greater than the phase velocity of the wave. We thus introduce another source of instability for these waves namely multiple ion beams drifting perpendicular to the magnetic field. |
Databáze: | OpenAIRE |
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