Experimental Studies on the High-beta Equilibrium and Stability of Rapidly Flowing Plasma Produced in Toroidal Non-neutral Plasma Trap

环形非中性等离子体阱中快速流动等离子体的高β平衡和稳定性实验研究

• 批准号: 14102033
• 负责人: YOSHIDA Zensho
• 金额: $ 50.59万
• 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 (S)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14102033/
• 关键词: Plasma Physics; Plasma Flow; High-beta Plasma; Advanced Fusion; Nonlinear Phenomena; Super-sonic Flow; Shock Wave; Non-neutral Plasma; 超高速流; プラズマ; 核融合; 自己組織化; double Beltrami場; 高ベータ; フローイングプラズマ; 宇宙プラズマ; ジェット; フローイング・プラズマ

We have studied the self-organization mechanism in flowing plasmas to explore the diversity of structures created in space and astronomical systems, and also examined the applicability of the high-beta equilibrium for advanced-fusion concept.1.Results of Theoretical StudiesWe have developed some innovative methods for the analysis of equilibria and stability of flowing plasmas. Unlike the conventional theories of stationary (non-flowing) plasmas, the analysis of flowing plasmas may not invoke the well-known methods of spectral decomposition or energy principle. Analyzing the topological singularities of the non-canonical Hamiltonian formalisms, we have succeeded to characterize the basic vertical structures of flow-field coupling in terms of Casimir invariants (helicities). The corresponding variational principle yields a Lyapunov function, whose coercivity warrants the stability of the "Beltrami fields", the minimizer of the variational principle. The theory has been applied to explai … More n the structural instabilities in solar corona, high-beta equilibria in Jupiter's magnetosphere, as well as new-type of flowing equilibria in Proto-RT and RT-1 devices.2.Results of Experimental StudiesWe have demonstrated stable formation of super-sonic (Mach number > 5) rotating plasma in the Proto-RT Device. The Proto-RT device can confine a non-neutral (pure electron) plasma in a "magnetosphere-like" configuration. A non-neutral plasma produces a flowing (spinning) equilibrium by its self-electric field. By applying an internal electric field in a quasi-neutral plasma, we can achieve a similar flowing plasma. We have established a unified understanding of non-neutral and flowing plasmas : (1)We have demonstrated stable confinement of non-neutral plasma in a magnetic-surface configuration,; (2)By applying a radial electric field, we have demonstrated the self-organization of stable super-sonic flowing plasma ; (3)We have demonstrated the production of a new branch of equilibrium by the effect of fast flow ; (4)We have developed new technologies to construct magnetosphere-like plasma confinement device. Less

我们研究了流动等离子体中的自组织机制，以探索空间和天文系统中产生的结构的多样性，并检查了高β平衡对先进聚变概念的适用性。1.理论研究结果我们发展了一些创新的方法来分析流动等离子体的平衡和稳定性。与静止（非流动）等离子体的传统理论不同，流动等离子体的分析可能不会调用众所周知的光谱分解或能量原理的方法。通过分析非正则哈密顿形式的拓扑奇异性，我们成功地用Casimir不变量（螺旋度）刻画了流场耦合的基本垂直结构。相应的变分原理产生一个李雅普诺夫函数，其稳定性保证的“Beltrami领域”，变分原理的最小值。该理论已被应用于解释 ...更多信息 在太阳日冕的结构不稳定性、木星磁层的高β平衡以及Proto-RT和RT-1装置中的新型流动平衡等方面进行了研究。2.实验结果我们证实了在Proto-RT装置中稳定地形成超音速（马赫数> 5）旋转等离子体。Proto-RT设备可以将非中性（纯电子）等离子体限制在“磁层”配置中。非中性等离子体通过自身电场产生流动（旋转）平衡。通过在准中性等离子体中施加内电场，我们可以获得类似的流动等离子体。我们建立了对非中性等离子体和流动等离子体的统一认识：（1）证明了非中性等离子体在磁表面位形中的稳定约束;（2）通过施加径向电场，证明了稳定的超音速流动等离子体的自组织;（3）证明了在快流作用下产生新的平衡分支;（4）发展了磁层等离子体约束装置的新技术。少

项目成果

A New-Type Equilibrium of Flowing Plasma Dominated by the Hall Effect

霍尔效应主导的新型等离子体流动平衡

• 发表时间: 2006
• 期刊: Plasma and Fusion Research 1
• 作者: J.Shiraishi;M.Furukawa;Z.Yoshida
• 通讯作者: Z.Yoshida

RT-1 project --magnetosphere-like plasma confinement,(Plenary Talk at Intemat.Symp.Open System,Tsukuba,2006)

RT-1 项目——类磁层等离子体约束，（在 Intemat.Symp.Open System 上的全体演讲，筑波，2006 年）

• 期刊: Fusion Tech. to be published
• 作者: Z.Yoshida

T.Tatsuno, Z.Yoshida, S.M.Mahajan: "Destabilizing effect of plane Couette flow"Physics of Plasmas. 10. 2278-2286 (2003)

T.Tatsuno、Z.Yoshida、S.M.Mahajan：“平面库埃特流的不稳定效应”等离子体物理学。

C.Nakashima, Z.Yoshida et al.: "Injection of electron beam into a toroidal trap using chaotic orbits near magnetic"Physical Review E. 65. 036409-1-036409-6 (2002)

C.Nakashima、Z.Yoshida 等人：“使用近磁混沌轨道将电子束注入环形陷阱”物理评论 E. 65. 036409-1-036409-6 (2002)

Resonance between continuous spectra: Secular behavior of Alfvén waves in a flowing plasma

连续光谱之间的共振：流动等离子体中阿尔芬波的长期行为

• DOI: 10.1063/1.1834591
• 发表时间: 2005
• 期刊: Physics of Plasmas
• 影响因子: 2.2
• 作者: M. Hirota;T. Tatsuno;Z. Yoshida
• 通讯作者: Z. Yoshida