Electron temperature gradient turbulence.

IAEA-CN/TH/P2-8 Electron Transport Driven by Short Wavelength Trapped Electron Mode Turbulence

This paper reports progress on gyrokinetic particle simulation of turbulence in fusion plasmas including: (1) Electron transport driven by short wavelength trapped electron mode turbulence; (2) Convergence studies and physics progress in long time simulation of electron temperature gradient turbulence; (3) Electromagnetic simulation of global magnetohydrodynamic modes and finite-β stabilization...

Electron temperature gradient driven turbulence*

Collisionless electron-temperature-gradient-driven ~ETG! turbulence in toroidal geometry is studied via nonlinear numerical simulations. To this aim, two massively parallel, fully gyrokinetic Vlasov codes are used, both including electromagnetic effects. Somewhat surprisingly, and unlike in the analogous case of ion-temperature-gradient-driven ~ITG! turbulence, we find that the turbulent electr...

5 M ar 2 00 7 Excitation of zonal flow by the modulational instability in electron temperature gradient driven turbulence February 2 , 2008

The generation of large-scale zonal flows by small-scale electrostatic drift waves in electron temperature gradient(ETG) driven turbulence model is considered. The generation mechanism is based on the modulational instability of a finite amplitude monochromatic drift wave. The threshold and growth rate of the instability as well as the optimal spatial scale of zonal flow are obtained.

Turbulent electron transport in edge pedestal by electron temperature gradient turbulence

On the dynamics of large-scale structures in electron temperature gradient turbulence

The electron temperature gradient mode has been proposed to be a source of experimentally relevant electron thermal transport, via a variety of nonlinear phenomena such as the generation of streamers. The question of streamer stability and saturation is revisited, with the effects of geometry and perturbation stability highlighted. It is shown that the streamer saturation level is not determine...