L-Mode Confinement Model Based on Transport-MHD Theory in Tokamaks

摘要

Theory of the L-mode confinement in tokamaks is developed based on the microscopic ballooning instability which is destabilized by the plasma transport below the critical pressure gradient against the ideal MHD instability. The destabilization by the current-diffusivity and the stabilization by the thermal transport and ion viscosity, are analyzed. The least stable mode determines the anomalous transport coefficients. The formula of the thermal transport coefficient is derived, which explains major experimental observations on the L-mode confinement.