Nonlinear nature of kinetic undamped waves induced by electrostatic turbulence in stimulated Raman backscattering

Observation of steepening in electron plasma waves driven by stimulated Raman backscattering.

Benthic Turbulence and Mixing Induced by Nonlinear Internal Waves

The long term goal of this work is to develop a fundamental understanding and predictive capability of the underlying physics of the interaction of nonlinear internal waves (NLIWs) with the continental shelf seafloor over a broad range of environmental conditions. We are particularly interested in how such interactions impact underwater optics and acoustics and shelf energetics and ecology by s...

Stimulated Raman backscattering of laser radiation in deep plasma channels

Stimulated Raman backscattering (RBS) of intense laser radiation confined by a single-mode plasma channel with a radial variation of plasma frequency greater than a homogeneous-plasma RBS bandwidth is characterized by a strong transverse localization of resonantly-driven electron plasma waves (EPW). The EPW localization reduces the peak growth rate of RBS and increases the amplification bandwid...

Nonlinear flow generation by electrostatic turbulence in tokamaks

Global gyrokinetic simulations have revealed an important nonlinear flow generation process due to the residual stress produced by electrostatic turbulence of ion temperature gradient ITG modes and trapped electron modes TEMs . In collisionless TEM CTEM turbulence, nonlinear residual stress generation by both the fluctuation intensity and the intensity gradient in the presence of broken symmetr...

Electrostatic backscattering by insulating obstacles

We introduce and analyze backscatter data for a three dimensional obstacle problem in electrostatics. In particular, we investigate the asymptotic behavior of these data as, (i), the measurement point goes to infinity, and (ii), the obstacles shrink to individual points. We also provide numerical simulations of these data.