Abstract This study is motivated by experiments on Tore Supra and WEST tokamaks where a deepening of the E × B velocity—governed radial electric field r —near edge observed when safety factor decreases in L-mode plasmas. Flux-driven global …
In situ workflows are inescapable to fully leverage exascale architectures. They can be complex build, however, because simulation and data analytics come from two different software ecosystems with their own paradigms programming models. This work …
The effect of toroidal rotation on both turbulent and neoclassical transport tungsten (W) in tokamaks is investigated using the flux-driven, global, nonlinear 5D gyrokinetic code GYSELA. Nonlinear simulations are carried out with different levels …
Abstract Reduced quasilinear and nonlinear (gradient-driven) models with scale separations, commonly used to interpret experiments forecast turbulent transport levels in magnetised plasmas, are tested against without separations (flux-driven). Two …
Abstract The effect of magnetic field ripple on tokamak plasma without turbulence is studied numerically and augmented with a reduced analytical model that includes neoclassical processes in the presence non-axisymmetric perturbation stochastic …
Abstract Two ways for producing a transport barrier through strong shear of the E × B poloidal flow have been investigated using GYSELA gyrokinetic simulations in flux-driven regime. The first one uses an external momentum (i.e. vorticity) source …
Abstract Magnetic confinement fusion offers the promise of sustainable and safe energy production on Earth. Advanced experimental scenarios exploit fascinating yet uncommon ability confined plasmas to bifurcate into states enhanced performance upon …