Abstract

Based on the method of self-sustained turbulence, the anomalous transport coefficient is derived for various toroidal plasmas. The L-mode confinements in the tokamaks, stellarators, H/T systems and RFP are explained by this formula, showing the influence of the magnetic geometry. The mechanism of the confinement improvement is discussed. Associated with the H-mode, the bifurcation physics is described. The catastrophic event at the {beta}-limit is described. 30 refs., 5 figs.

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