Stability of Electrostatic Electron Cyclotron Waves in a Multi-Ion Plasma

作者：Abraham Noble P; George Samuel; Sreekala G; Sebastian Sijo; Venugopal Chandu^*; Renuka G

来源：Earth, Moon, and Planets, 2014, 111(3-4): 115-125.

DOI：10.1007/s11038-014-9429-7

• Electrostatic electron cyclotron waves
• Perpendicular ion beams
• Multi-ion plasmas

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 omega (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.

• 出版日期2014-5