In laser-plasma experiments, we observed that ion acceleration from the Coulomb explosion of the plasma channel bored by the laser is prevented when multiple plasma instabilities, such as filamentation and hosing, and nonlinear coherent structures (vortices or postsolitons) appear in the wake of an ultrashort laser pulse. The tailoring of the longitudinal plasma density ramp allows us to contro...

The nonlinear dynamics of a warped accretion disc is investigated in the important case of a thin Keplerian disc with negligible viscosity and self-gravity. A one-dimensional evolutionary equation is formally derived that describes the primary nonlinear and dispersive effects on propagating bending waves other than parametric instabilities. It has the form of a derivative nonlinear Schrödinger ...

The paper presents observations of plasma intermediate frequency range wave emission ((200--1000) MHz) performed in ohmic discharge the FT-2 tokamak. dependencies RF signal amplitude and spectrum on parameters location probes are presented. Two possible explanations for this effect is proposed. One them related to distortion electron distribution function due strong ripple magnetic field Second...

We investigate pattern transformations of periodic hydrogel systems that are triggered by swelling-induced structural instabilities. The types microstructures considered in the present work include single-phase and two-phase voided structures as well reinforced thin films. While observed show good agreement with experimental findings, materials provide novel patterns associated wrinkling intern...

The theory of the ion cyclotron (IC) electrostatic parametric instabilities inhomogeneous plasma that are driven by electric field fast wave (FW) in front FW antenna is developed. It found spatial inhomogeneity IC turbulence and drift at origin flows transport a large part power, deposited to pedestal plasma, scrape-off layer later divertor mostly along lines.

In magnetic films driven by spin-polarized currents, the perpendicular-to-plane anisotropy is equivalent to breaking time translation symmetry, i.e., a parametric pumping. this work, we numerically study those current-driven magnets via Landau–Lifshitz–Gilbert–Slonczewski equation in one spatial dimension. We consider space-dependent field parametric-like regime. The profile antisymmetric middl...