A note on electrostatic ion/dust cyclotron instabilities in dusty plasmas

The electrostatic dust cyclotron instability (EDC) in dusty plasmas is somewhat analogous to the electrostatic ion cyclotron instability (EIC) in electron-ion plasmas, negative ion plasmas, and dusty plasmas. While the EIC instability can be driven by an electron drift along the magnetic field, the EDC instability can be driven by an ion drift along B in a plasma with negatively charged dust. The frequency of these EDC waves is of the order of the dust cyclotron frequency, which can be much smaller than the ion cyclotron frequency due to the dust's small charge-to-mass ratio. Thus, at these lower frequencies, it is necessary to also consider the effect of collisions (ion-neutral, electron-neutral, as well as dust-neutral). We report briefly on our recent kinetic analyses on the electrostatic dust cyclotron instability in a weakly ionized collisional dusty plasma. The EDC is then compared to the EIC in both the collisionless and collisional regimes