Credit: Image courtesy of Princeton Plasma Physics Laboratory
(Left) A typical plasma-density-fluctuation pattern from edge turbulence in a realistic tokamak geometry. The black line shows the magnetic separatrix surface with the magnetic X-point at the bottom. (Right) The suppression of high amplitude turbulence (red) starts around 0.175 milliseconds (ms), leftmost vertical line, and completes around 0.2 ms, at the vertical solid line, followed by the suppression of lower amplitude turbulence (shades of green and blue). The large eddies transform into smaller ones over time.