Density bump formation in a collisionless electrostatic shock wave in a laser-ablated plasma
arXiv:1607.02176 · doi:10.1134/S0021364017030067
Abstract
The emergence of a density bump at the front of a collisionless electrostatic shock wave have been observed experimentally during the ablation of an aluminium foil by a femtosecond laser pulse. We have performed numerical simulations of the dynamics of this phenomena developing alongside the generation of a package of ion-acoustic waves, exposed to a continual flow of energetic electrons, in a collisionless plasma. We present the physical interpretation of the observed effects and show that the bump consists of transit particles, namely, the accelerated ions from the dense plasma layer, and the ions from the diluted background plasma, formed by a nanosecond laser prepulse during the ablation.
arXiv comment5 pages, 7 figures, submitted to JETPL
References in corpus (5)
- Observation of magnetic field generation via the Weibel instability in interpenetrating plasma flows
- Electrostatic shock dynamics in superthermal plasmas
- Time-resolved characterization of the formation of a collisionless shock
- Weibel instability-mediated collisionless shocks in laser-irradiated dense plasmas:Prevailing role of the electrons in the turbulence generation
- A Study of the Early-stage Evolution of Relativistic Electron-Ion Shock using 3D PIC Simulations