Theory

Understanding and predicting transport of particles, momentum and energy across the magnetic field in magnetically confined toroidal plasmas is of the utmost importance in the fusion energy program for an obvious reason: the highest the transport level, the lower the confinement time. Hence, relevant progress in the comprehension of transport phenomena will surely have an …

Neoclassical simulations

Neoclassical theory [Galeev-68, Hinton-76] sets a lower bound on transport in toroidal plasmas. In the case of three-dimensional devices, neoclassical transport may become even dominant as the temperature of the plasma increases, due to the unfavorable temperature scaling of the transport coefficients. Hence, the comprehensive study of neoclassical transport is a necessary condition for both …

Experiments

The ultimate goal of our Theory and Simulation activities is to understand what is observed in experiments, specifically in the TJ-II stellarator device. Some of the measurements we would like to improve our understanding of are Decay of Zonal flow-like structures detected with double Langmuir probe systems. These turbulence-generated, global ExB¬†rotation patterns are thought to …