Two dimensional magnetised plasma turbulence G. G. PLUNK1,2,3 †, S. C. COWLEY4,5, A. A. SCHEKOCHIHIN6,7 AND T. TATSUNO7 Department of Physics, University of California, Los Angeles, CA 90095, USA Wolfgang Pauli Institute, University of Vienna, A-1090 Vienna, Austria IREAP, University of Maryland, College Park, MD 20742, USA EURATOM/UKAEA Fusion Association, Culham Science Centre, Abington OX 14...

Theoretical approaches to low-frequencymagnetized turbulence in collisionless and weakly collisional astrophysical plasmas are reviewed. The proper starting point for an analytical description of these plasmas is kinetic theory, not fluid equations. The anisotropy of the turbulence is used to systematically derive a series of reduced analytical models. Above the ion gyroscale, it is shown rigou...

A method is proposed to experimentally determine the intrinsic time scale or a decay rate of turbulent fluctuations. The method is based on the assumption that the Breit-Wigner spectrum model with a non-Gaussian frequency broadening is valid in the data analysis. The decay rate estimate is applied to the multi-spacecraft magnetic field data in interplanetary space, yielding that the result that...

Effects on the communication signals caused by the time-varying plasma sheath surrounding hypersonic vehicles are investigated. Using computational fluid dynamics (CFD) technique, Demetriades’s plasma turbulence model and finite-difference time-domain (FDTD) algorithm, amplitude variation and phase fluctuation induced by plasma electron density turbulence are obtained, and their statistical pro...

The highly amplified magnetic fields suggested by observations of some supernova remnant shells are most likely an intrinsic part of efficient particle acceleration by shocks. This strong turbulence, which may result from cosmicray-driven instabilities, both resonant and nonresonant, in the shock precursor, is certain to play a critical role in selfconsistent, nonlinear models of strong, cosmic...

With the aim of understanding the anomalous transport mechanism in the magnetic confinement fusion plasma and quantitatively predicting the transport level, gyrokinetic simulations of plasma turbulence have been carried out by means of the originally developed code (GKV code). The GKV simulations solving time-evolutions of particle distribution function in the five-dimensional phase-space have ...

In situ particle acceleration is probably occur-ing in cluster radio haloes. This is suggested by the uniformity and extent of the haloes, given that spatial diffusion is slow and that radiative losses limit particle lifetimes. Stochastic acceleration by plasma turbulence is the most likely mechanism. Alfven wave turbulence has been suggested as the means of acceleration, but it is too slow to ...

The variety of scalar and vector fields in laboratory and nature plasmas is formed by plasma turbulence. Drift-wave fluctuations, driven by density gradients in magnetized plasmas, are known to relax the density gradient while they can generate flows. On the other hand, the sheared flow in the direction of magnetic fields causes Kelvin-Helmholtz type instabilities, which mix particle and moment...

A major goal of ionospheric high power radio wave modiication experiments is the unraveling of the physics of the plasma turbulence created by the high frequency (HF) pump wave. The signature of this turbulence can be seen in the plasma line spectrum obtained from an incoherent scatter (sometimes called Thomson scatter) very high or ultra high frequency (VHF or UHF) radar probe beam. Here we pr...

The propagation of microwaves across a turbulent plasma density layer is investigated with fullwave simulations. To properly represent a fusion edge-plasma, drift-wave turbulence is considered based on the Hasegawa-Wakatani model. Scattering and broadening of a microwave beam whose amplitude distribution is of Gaussian shape is studied in detail as a function of certain turbulence properties. P...