Synergy between ion temperature gradient turbulence and neoclassical processes in global gyrokinetic particle-in-cell simulations
نویسندگان
چکیده
Related Articles Second harmonic electromagnetic emission of a turbulent magnetized plasma driven by a powerful electron beam Phys. Plasmas 19, 044501 (2012) Dissipation range turbulent cascades in plasmas Phys. Plasmas 19, 055906 (2012) Thermal plasma and fast ion transport in electrostatic turbulence in the large plasma device Phys. Plasmas 19, 055904 (2012) Impact of resonant magnetic perturbations on nonlinearly driven modes in drift-wave turbulence Phys. Plasmas 19, 055903 (2012) Evidence of critical balance in kinetic Alfvén wave turbulence simulations
منابع مشابه
TH-C/P8-44 Interaction between Turbulence and Neoclassical Dynamics and Its Effect on Tokamak Transport: Gyrokinetic Simulations and Theory
Abstract. The relationship between momentum and energy transport is investigated with focus on understanding recent experimental observations, using global gyrokinetic simulations with proper coupling between turbulence and neoclassical dynamics. First, a large inward flux of toroidal momentum is found robustly in the post saturation phase of ion temperature gradient (ITG) turbulence. As a cons...
متن کاملGyrokinetic studies on turbulence-driven and neoclassical nondiffusive toroidal-momentum transport and the effect of residual fluctuations in strong E x B shear.
A significant inward flux of toroidal momentum is found in global gyrokinetic simulations of ion temperature gradient turbulence, leading to core plasma rotation spin-up. The underlying mechanism is identified to be the generation of residual stress due to the k parallel symmetry breaking induced by global quasistationary zonal flow shear. Simulations also show a significant off-diagonal elemen...
متن کاملThis is a Word Template for Producing a Full Manuscript for the Fusion Energy Conference Proceedings 2002
A new global gyrokinetic toroidal full-f five dimensional (5D) Vlasov simulation (GT5D) [1] is developed using a novel non-dissipative conservative finite difference scheme (NDCFD) [2], which guarantees numerical stability by satisfying relevant conservation properties of the modern gyrokinetic theory. By using GT5D, robust and accurate long time simulations of tokamak micro-turbulence are enab...
متن کاملCollisions in Global Gyrokinetic Simulations of Tokamak Plasmas Using the f Particle-In-Cell Approach: Neoclassical Physics and Turbulent Transport
The present work takes place within the general context of research related to the development of nuclear fusion energy. More specifically, this thesis is mainly a numerical and physical contribution to the understanding of turbulence and associated transport phenomena occuring in tokamak plasmas, the most advanced and promising form of magnetically confined plasmas. The complexity of tokamak p...
متن کاملGlobal gyrokinetic particle simulations with kinetic electrons
A toroidal, nonlinear, electrostatic fluid-kinetic hybrid electron model is formulated for global gyrokinetic particle simulations of driftwave turbulence in fusion plasmas. Numerical properties are improved by an expansion of the electron response using a smallness parameter of the ratio of driftwave frequency to electron transit frequency. Linear simulations accurately recover the real freque...
متن کامل