Dispersion Relation of Electrostatic Ion Cyclotron Waves in Multi-Component Magneto-Plasma

Electrostatic ion cyclotron waves in multi component plasma composed of electrons (denoted by e(-)), hydrogen ions (denoted by H+), helium ions (denoted by He+) and positively charged oxygen ions (denoted by O+) in magnetized cold plasma. The wave is assumed to propagate perpendicular to the static magnetic field. It is found that the addition of heavy ions in the plasma dispersion modified the lower hybrid mode and also allowed an ion-ion mode. The frequencies of the lower hybrid and ion-ion hybrid modes are derived using cold plasma theory. It is observed that the effect of multi-ionfor different plasma densities on electrostatic ion cyclotron waves is to enhance the wave frequencies. The results are interpreted for the magnetosphere has been applied parameters by auroral acceleration region.