Saturation of the ion drift instability in collisional complex plasmas by ion trapping.

Competition between ion trapping and collisional detrapping is considered to be an important issue in the stabilization of the ion flow instability. The saturation amplitudes in terms of the particle density are derived and compared to the experimental data.

Electrostatic modes in dusty plasmas with continuous size distributions.

When the dust plasma frequency, and hence the dust-acoustic velocity is computed for a dusty plasma containing charged grains with individual identities, three possibilities occur in a natural way. One form is based on the average over all dust grains of the ratio of the square of charge to mass, whereas a second one uses the average charge and the average mass. The difference between the two gives rise to a dust distribution mode.

Oblique electrostatic modes in self-gravitating dusty plasmas.

The propagation of oblique and perpendicular electrostatic modes in dusty self-gravitational magnetized plasmas is treated with due care for the small gravitational effects between charged dust particles and for the correct balance between electrostatic and gravitational forces. At purely oblique propagation, generalizations of the dust-cyclotron and dust-acoustic modes are found, where the latter can be subject to a Jeans instability. For strictly perpendicular propagation, only a mixed dust-acoustic and dust lower-hybrid mode occur at low frequencies.