Speaker
Description
In this manuscript, a comparative study is presented on the generation of ion Bernstein waves and ion cyclotron waves through the parametric instability of whistler waves in dusty plasma. The electron density perturbations associated with the ion Bernstein wave couple with the oscillatory velocity of plasma electrons driven by the whistler pump wave, creating a nonlinear current that drives the whistler sideband wave. Both the whistler pump wave and the whistler sideband wave exert a ponderomotive force on the electrons, which in turn drives the ion Bernstein and ion cyclotron waves. The impact of dust charge fluctuations on this process is investigated, and the growth rate expressions for both the ion Bernstein and ion cyclotron waves are derived. It is observed that the growth rate increases with higher pump wave amplitude, wave number, scattering angle, and dust grain density. However, a decrease in growth rate is seen with increasing dust grain size and electron temperature. Additionally, a comparison reveals that the ion Bernstein wave is more unstable than the ion cyclotron wave, resulting in a higher growth rate for the ion Bernstein wave in dusty plasma
