Kinetic Approarch to Ballooning Mode and Anomalous Plasma Diffusion

抄録

The ballooning mode equation has been derived by a kinetic approach with an uniform radial electric field and electron collision effects in a tokamak. Applying an averaging method an analytical form of the growth rate has been obtained, which has been applied for the derivation of the diffusion coefficient. At the L-H transition, although the cengrifugal force due to plasma rotation destabilizes the ballooning mode, the stabilization by the change of density profile is stronger, and the plasma state may change from the ideal ballooning L-mode state to the H-mode state in the second stability region.