Kinetic Effects on Self-Organization in Plasma

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To explore innovative concepts of fusion plasma confinement, especially in the high-beta regime that can host the D-3He advanced fusion, we have to develop a sound understanding on the physics of relaxation that self-organizes the most preferable structure in the plasma. The theory of the Taylor relaxed states succeeded to explain the self-organization of the reversed-field pinch (RFP) and ultra-low-q (ULQ) plasmas.In the present research, we have made a considerable generalization of the self-organization theory through the study of kinetic (particle dynamics) and flow effects. The results are summarized as follows ; (1) When a plasma has a macroscopic non-neutral charge, the self-electric field yields a strong rotating flow. The two-fluid model provides a self-consistent description of the relaxed states with a strong flow. A variety of interesting structures can be cast in the model of double Beltrami fields ; (2) The particle motion becomes chaotic in a strongly inhomogeneous electromagnetic field, resulting in a rapid production of the kinetic entropy. As a macroscopif effect of the chaos, the resistive dissipation is much enhanced, which accounts for the anomalous resistance in the magnetic reconnection process of the self-organization.