Theory of anomalous transport in<i>H</i>-mode plasmas

Abstract

A unified model theory of the anomalous transport of high temperature plasma, L mode and H mode, is developed. Self-sustained turbulence theory for the pressure driven mode is extended, incorporating the effect of inhomogeneous radial electric field ${\mathit{E}}_{\mathit{r}}$(r) to cover two electrically bifurcated states. Strong reductions of heat and current diffusivities, viscosity, the fluctuation amplitude, and correlation length are predicted in nonlinearly sustained turbulence. A consistent radial width of ${\mathit{E}}_{\mathit{r}}$(r) is obtained. A new stability window is also found.