Turbulence often looks very picturesque… but turbulence is not exactly what plasma physicists like best since it increases the loss of energy from the core of fusion plasmas. However, spectacular scientific progress has been made over the past few years: turbulent phenomena in fusion plasmas can now be simulated, as shown on this picture obtained with the Semi-Langrangian 5D Code GYSELA. And furthermore, the improved understanding allowed phenomena to be identified, called Zonal Flows, that can break turbulent streamers and thereby improve plasma thermal insulation.

Figure: Courtesy of Laurent Villard, presented at the 14th European Fusion Workshop, Greoux les Bains, France, December 2006.