Kinetic Effects on Self-Organization in Plasma

等离子体自组织的动力学效应

• 批准号: 10044130
• 负责人: YOSHIDA Zensho
• 金额: $ 2.37万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10044130/
• 关键词: Self-organization; Collective phenomena; Chaos; Nuclear fusion; Kinetic effects; Anomalous resistance; Relaxation; Magnetic reconnection; 流れを伴うMHD緩和; 運動論; Hモード; 非中性プラズマの熱平衡; カオスによる無衝突散逸; シヤー流; 電流フィラメント; 内部電流系プラズマ; 磁場構造の自己組織化; 電流のフィラメント化 /

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.

为了探索聚变等离子体约束的创新概念，特别是在可以承载D-3He高级聚变的高β区，我们必须对弛豫物理学有一个良好的理解，该物理学自组织等离子体中最优选的结构。Taylor弛豫态理论成功地解释了反向场箍缩（RFP）和超低q（ULQ）等离子体的自组织现象，本文通过对动力学（粒子动力学）和流动效应的研究，对自组织理论进行了推广。主要结果如下：（1）当等离子体中含有宏观非中性电荷时，自电场产生强旋转流。双流体模型提供了一个自洽的描述与强流的松弛状态。在双Beltrami场模型中，粒子的运动呈现出各种有趣的结构;（2）在强非均匀电磁场中，粒子的运动变得混沌，导致动力学熵的快速产生。作为混沌的宏观效应，电阻耗散大大增强，这是自组织磁重联过程中出现反常电阻的原因。

项目成果

S. Mahajan and Z. Yoshida: "A collisionless self-organizing model for the high-confinement (H-mode) boundary layer"Physics of Plasmas. 7・2. 635-640 (2000)

S. Mahajan 和 Z. Yoshida：“高约束（H 模式）边界层的无碰撞自组织模型”等离子体物理学 7・2（2000 年）。

吉田善章: "緩和現象の物理"プラズマ・核融合学会誌. 76. 713-723 (2000)

Yoshiaki Yoshida：“弛豫现象的物理学”等离子体与核聚变学会杂志 76. 713-723 (2000)。

Z. Yoshida and S. Mahajan: "Simultaneous Beltrami conditions in coupled vortex dynamics"Journal of Mathematical Physics. 40・10. 5080-5091 (1999)

Z. Yoshida 和 S. Mahajan：“耦合涡动力学中的同步贝尔特拉米条件”《数学物理杂志》40・10（1999）。

F.Volponi, Z.Yoshida and T.Tatsuno: "Shear-flow induced stabilization of kinklike modes"Phys.Plasmas. 7. 2314-2319 (2000)

F.Volponi、Z.Yoshida 和 T.Tatsuno：“剪切流诱导扭结模式的稳定性”Phys.Plasmas。

Z.Yoshida et al.: "Toroidal Magnetic Confinement of Non-Neutral Plasmas"NON-NEUTRAL PLASMA PHYSICS III. 397-404 (1999)

Z.Yoshida 等人：“非中性等离子体的环形磁约束”非中性等离子体物理学 III。