X-point ion orbit physics in scrape-off layer and generation of a localized electrostatic potential perturbation around X-point

Scrape-Off Layer physics in limited plasmas in TCV

Controlled nuclear fusion is the most promising candidate for being an inexhaustible, clean and intrinsically safe energy source. Research in the last 60 years has focused on the fusion reactor concept called tokamak, in which a high temperature plasma is confined using magnetic fields, producing fusion reactions. Because of turbulence, the confined plasma diffuses to the outermost region of th...

On the electrostatic potential in the scrape-off layer of magnetic confinement devices

The mechanism regulating the equilibrium electrostatic potential in the scrape-off layer (SOL) of magnetic confinement devices is elucidated. Based on a generalized Ohm’s law and the boundary conditions at the magnetic presheath entrance, an analytical expression for the equilibrium electrostatic potential is derived. Results imply that the relative importance of the plasma dynamics at the shea...

Finite ion temperature effects on scrape-off layer turbulence

Discontinuous Galerkin methods for plasma physics in the scrape-off layer of tokamaks

A new parallel discontinuous Galerkin solver, called ArcOn, is developed to describe the intermittent turbulent transport of filamentary blobs in the scrape-off layer (SOL) of fusion plasma. The model is comprised of an elliptic subsystem coupled to two convection-dominated reactiondiffusion-convection equations. Upwinding is used for a class of numerical fluxes developed to accommodate cross p...

Parallel transport in a tokamak scrape-off layer

G. Manfredi1, S. Hirstoaga2, S. Devaux3, E. Havlíčková4, D. Tskhakaya5 1 Institut de Physique et Chimie des Matériaux, Strasbourg, France 2 INRIA and Institut de Recherche en Mathématiques Avancées, Strasbourg, France 3 Max-Planck-Institut für Plasmaphysik, Garching, Germany 4 Culham Centre for Fusion Energy, Abingdon, United Kingdom 5 Institute for Theoretical Physics, University of Innsbruck,...