In this paper we report on two instabilities observed in dusty plasmas, at different stages of dust particle formation. Experiments are performed in a low-pressure Ar/SiH4 radiofrequency plasma. The first instability, occuring at the transition between nanocrystal accumulation and coalescence phases, is very sensitive to operating conditions. It is shown to be a good indicator of the end of nan...

. . . . . . . . . . . . . . . . . . . . . . . . . . . . i Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . . 5 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure Captions . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

The effect of dust grains on the parametric coupling neutral beam driven ion–cyclotron wave instability with a lower hybrid pump is studied. A high amplitude pump, which launched into tokamak for heating purposes in presence ion-cyclotron waves, can excite involving two sidebands. In tokamak, waves result excitation mode and quasi-modes near edge when electron oscillatory velocity greater than ...

Context. The physics of the pulsar magnetosphere near the neutron star surface remains poorly constrained by observations. Although about 2000 pulsars have been discovered to date, little is known about their emission mechanism, from radio to high-energy X-ray and gamma-rays. Large vacuum gaps probably exist in the magnetosphere, and a non-neutral plasma partially fills the neutron star surroun...

Context. The existence of suprathermal charged particle populations in space plasma is frequently confirmed by interplanetary missions. In general, the velocity distribution functions are anisotropic, field aligned (gyrotropic) with two temperatures, parallel (T‖) and perpendicular (T⊥) to the ambient magnetic field B0. Aims. Here, the dispersion properties of the firehose instability, which re...