Transport through dissipative trapped electron mode and toroidal ion temperature gradient mode in TEXTOR

Gyrokinetic Particle-In-Cell Global Simulations of Ion-Temperature-Gradient and Collisionless-Trapped- Electron-Mode Turbulence in Tokamaks

The goal of thermonuclear fusion research is to provide power plants, that will be able to produce one gigawatt of electricity. Among the different ways to achieve fusion, the tokamak, based on magnetic confinement, is the most promising one. A gas is heated up to hundreds of millions of degrees and becomes a plasma, which is maintained or confined in a toroidal vessel by helical magnetic field...

Zonal flow generation in ion temperature gradient mode turbulence

In the present work the zonal flow ~ZF! growth rate in toroidal ion-temperature-gradient ~ITG! mode turbulence including the effects of elongation is studied analytically. The scaling of the ZF growth with plasma parameters is examined for typical tokamak parameter values. The physical model used for the toroidal ITG driven mode is based on the ion continuity and ion temperature equations where...

Ion temperature gradient driven turbulence with strong trapped ion resonance

Nonlinear stability and instability in collisionless trapped electron mode turbulence

A two-field model for collisionless trapped electron mode turbulence has both finite amplitude-induced stability and instability, depending on wave number. Effects usually identified with nonlinear plasma instability ~self-trapping, kinetics, 3D mode structure, magnetic shear! are absent. Nonlinear stability and instability reside in E3B advection of density. It drives modes of a purely damped ...

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...