Tokamak size parameters of fusion interest are used. The potential contours are rendered as colors on selected slices of 3D data constructed by stacking pieces of the flux-tube. An isosurface from the flux-tube data is also shown. Shows contours on a poloidal and outer and inner midplane sections of a toroidal annulus bounded by two flux surfaces. The sheet traverses 1 poloidal circuit and roughly 2 toroidal circuits.
Shows contours on a single radial flux surface.
This work supported by the HPCC Numerical Tokamak Project. In the linear phase, the radial correlation length of the fluctuations is long with strong poloidal dependence. In the nonlinear phase, the radial correlation length of the fluctuations is of the order of a mode width and practically independent of the poloidal angle. However, the particle flux and rms fluctuations have a ballooning character as illustrated by the steady state pressure fluctuations shown in the figure. The figure illustrates how both the amplitude and the scale size of the fluctuations are decreased in the H-mode.