2000 Fiscal Year Final Research Report Summary
Kinetic Effects on Self-Organization in Plasma
| Project/Area Number |
10044130
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nuclear fusion studies
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| Research Institution | The University of Tokyo |
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Principal Investigator |
YOSHIDA Zensho University of Tokyo, Graduate School of Frontier Sciences, Professor, 大学院・新領域創成科学研究科, 教授 (80182765)
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| Co-Investigator(Kenkyū-buntansha) |
TATSUNO Tomoya University of Tokyo, 大学院・新領域創成科学研究科, 助手 (60313011)
HIMURA Haruhiko University of Tokyo, 大学院・新領域創成科学研究科, 助教授 (30311632)
OGAWA Yuichi University of Tokyo, 教授 (90144170)
MORIKAWA Junji University of Tokyo, 助手 (70192375)
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| Project Period (FY) |
1998 – 2000
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| Keywords | Self-organization / Collective phenomena / Chaos / Nuclear fusion / Kinetic effects / Anomalous resistance / Relaxation / Magnetic reconnection |
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| Research Abstract |
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.
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