Non-equilibrium plasma physics near criticality: phase-space cascades, wave-flow interactions, edge-of-chaos structures and turbulent transport
接近临界的非平衡等离子体物理:相空间级联、波流相互作用、混沌边缘结构和湍流传输
基本信息
- 批准号:2117056
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:英国
- 项目类别:Studentship
- 财政年份:2018
- 资助国家:英国
- 起止时间:2018 至 无数据
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The question of how large a temperature difference can be maintained between the core and the edge of the plasma in a fusion machine opens a window onto some of the most fundamental theoretical questions about the structure of nonlinear, non-equilibrium states in magnetised plasma. These questions revolve around the ways in which free energy extracted from macroscopic inhomogeneities of the system (in the case of a fusion plasma, from the background temperature gradient) in the form of electromagnetic fluctuations is distributed in phase space (particles' positions and momenta) so as to give rise to a chaotic, multiscale (=turbulent) state that accommodates a steady flow of energy from macro to micro scales and its return to its inevitable resting place in the form of the thermal motion of the particles. This distribution of energy is then what determines how the turbulent plasma transports heat and momentum. This project's aim is to follow up on a number of recent developments in our understanding of these phenomena and investigate: the implications of the nonlinear suppression of energy flows into phase space [1,2] for transport models; the delicate balance between a chaotic field of plasma excitations ("drift waves") and self-generated regular "zonal" flows [3] that maintains the nonlinear state of a plasma near the critical threshold separating the turbulent and quiescent phases; the emergence of persistent coherent structures at this so-called "edge of chaos" [4] --- and how all this fits together and conspires to set limits on the background gradients. The project will have analytical, numerical and possibly experimental [5] components, depending on rate of progress and student's inclinations.1. A. A. Schekochihin et al., J. Plasma Phys. 82, 905820212 (2016)2. T. Adkins & A. A. Schekochihin, J. Plasma Phys. 84, 905840107 (2018)3. G. J. Colyer et al., Plasma Phys. Control. Fusion 59, 055002 (2017)4. F. van Wyk et al., J. Plasma Phys. 82, 905820609 (2016)5. M. F. J. Fox et al., Plasma Phys. Control. Fusion 59, 034002 (2017)
在聚变机中,等离子体的核心和边缘之间可以保持多大的温差,这个问题为磁化等离子体中非线性、非平衡态结构的一些最基本的理论问题打开了一扇窗。这些问题围绕着自由能从系统的宏观不均匀性中提取的方式(在聚变等离子体的情况下,来自背景温度梯度)以电磁波动的形式分布在相空间中。(粒子的位置和动量),从而产生混沌,一种多尺度(=湍流)状态,它容纳从宏观到微观尺度的稳定能量流,并以粒子热运动的形式返回其不可避免的静止位置。这种能量分布决定了湍流等离子体如何传输热量和动量。这个项目的目的是跟进我们对这些现象的理解的一些最新进展,并调查:传输模型中能量流进入相空间[1,2]的非线性抑制的含义;等离子体激发的混沌场(“漂移波”)和自生规则“带状”流[3],其保持等离子体的非线性状态接近分离湍流和静止相的临界阈值;在这个所谓的“混沌边缘”出现了持久的相干结构[4] -以及所有这些是如何结合在一起并合谋对背景梯度设置限制的。该项目将有分析,数值和可能的实验[5]组件,这取决于进度和学生的倾向。A. A. Schekochihin等人,等离子体物理学杂志82,905820212(2016)2. T. Adkins & A. A. Schekochihin,J. Plasma Phys. 84,905840107(2018)3. G. J. Colyer等人,等离子体物理控制Fusion 59,055002(2017)4. F.货车Wyk等人,等离子体物理学杂志82,905820609(2016)5. M. F. J. Fox等人,等离子体物理控制Fusion 59,034002(2017)
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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其他文献
吉治仁志 他: "トランスジェニックマウスによるTIMP-1の線維化促進機序"最新医学. 55. 1781-1787 (2000)
Hitoshi Yoshiji 等:“转基因小鼠中 TIMP-1 的促纤维化机制”现代医学 55. 1781-1787 (2000)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
LiDAR Implementations for Autonomous Vehicle Applications
- DOI:
- 发表时间:
2021 - 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
吉治仁志 他: "イラスト医学&サイエンスシリーズ血管の分子医学"羊土社(渋谷正史編). 125 (2000)
Hitoshi Yoshiji 等人:“血管医学与科学系列分子医学图解”Yodosha(涉谷正志编辑)125(2000)。
- DOI:
- 发表时间:
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- 影响因子:0
- 作者:
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Effect of manidipine hydrochloride,a calcium antagonist,on isoproterenol-induced left ventricular hypertrophy: "Yoshiyama,M.,Takeuchi,K.,Kim,S.,Hanatani,A.,Omura,T.,Toda,I.,Akioka,K.,Teragaki,M.,Iwao,H.and Yoshikawa,J." Jpn Circ J. 62(1). 47-52 (1998)
钙拮抗剂盐酸马尼地平对异丙肾上腺素引起的左心室肥厚的影响:“Yoshiyama,M.,Takeuchi,K.,Kim,S.,Hanatani,A.,Omura,T.,Toda,I.,Akioka,
- DOI:
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- 期刊:
- 影响因子:0
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的其他文献
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2879438 - 财政年份:2027
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