Evolution of potential fluctuations in a plasma very similar to DIII-D 101381/101391. Simulation is centered at r/a=0.6. Note the strong equilibrium sheared rotation, which leads to a strong reduction in transport. This landmark simulation from 2002 includes kinetic electrons at finite-beta, along with the equilibrium ExB variation.
Simulation demonstrating that an ITB does not form simply in response to a minimum-q region. The q-profile is parabolic, so that shear is negative to the left of r/a=0.5, and positive to the right. The simulation domain was 100 gyroadii wide.
Full-torus analogues of the Cyclone DIII-D base case at R/LT = 6.9 using that standard GYRO-style pressure profile, which extends unaltered to the ends of the simulation domain.
Same as above, but using a type of pressure profile which is artificially "clamped" to zero at the boundaries. The sort of profile is used in some global GK codes, and is shown here to dramatically reduce the volume of the simulation which is actually physical.
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