On the Possibility of Dust Grain Destruction by the Coloumb Explosion in Protoplanetary Disks

Radiophysics and Quantum Electronics - We consider the dust charging processes in protoplanetary disks. It is shown that in the atmosphere of a disk, grains can acquire anomalously high positive...     

Numerical Simulation of Nonlinear Effects in the Weibel Instability

Radiophysics and Quantum Electronics - We analyze in detail the nonlinear effects taking place in an anisotropic plasma at different stages of the Weibel instability using a new approach to the...     

Weibel Mechanism of Magnetic-Field Generation in the Process of Expansion of a Collisionless-Plasma Bunch with Hot Electrons

Radiophysics and Quantum Electronics - We perform qualitative physical analysis and particle-in-cell two-dimensional numerical simulation of the Weibel mechanism of magnetic-field generation due to...     

Features of the generation of a collisionless electrostatic shock wave in a laser-ablation plasma

The appearance of a density bump is experimentally revealed in an electrostatic shock wave during the ablation of an aluminum foil by a femtosecond laser pulse. The numerical simulation shows that this phenomenon can be explained by the generation of a packet of ion acoustic waves under the action of high-energy electron flows in a collisionless plasma. It is found that, for the formation and maintenance of the dense plasma layer in the shock wave, the contributions of accelerated ions overtaking it and wave-captured ions of the background plasma formed by a nanosecond laser prepulse in the process of ablation are significant.