Fundamental Processes in Plasmas

等离子体的基本过程

• 批准号: 0903877
• 负责人: Thomas O'Neil
• 金额: $ 200万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-01 至 2014-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0903877&HistoricalAwards=false
• 关键词: Fundamental; Processes; Plasmas

Fundamental Processes in PlasmasT.M. O'Neil, C.F. Driscoll and D.H.E. DubinThis collaboration of 3 UCSD faculty will address a broad range of fundamental processes in plasmas, and will emphasize problems for which precise experimental tests of theory can be obtained. The experiments will be performed on camera-diagnosed pure-electron plasmas and laser-diagnosed pure-ion plasmas. The research will include work in 6 general areas:1) Theory work on anti-hydrogen formation and relaxation via plasma collisions will continue, ranging from O'Neil's "Guiding Center Atom" regime to the more deeply-bound chaotic regimes.2) Experiments have now measured the Salpeter enhancement of perp-to-parallel collisions in strongly correlated plasmas, and future work will quantitatively test theory ideas and apply them to "burn-front" propagation dynamics.3) Experiments and theory on long-range ExB drift interactions will continue, characterizing heat transport, viscosity, and particle transport limited by background shear flows, utilizing laser-tagging to image the elusive thermally-excited convection cells.4) Experiments will quantify the wave-coherent particle distribution function in the novel "Electron Acoustic Mode", with theory support to understand the extreme frequency-variability of these nonlinear waves.5) Experiments and theory will continue on 2D fluid vortex dynamics, inviscid wave damping, and "vortex crystals," including statistical mechanics descriptions of these novel states.6) Experiments and theory will develop the new "chaotic scattering" regime of neoclassical transport, which occurs when theta-rippled trapping separatrices are driven by plasma rotation. This work may be "transformative", given the broad range of wave damping, nonlinear wave coupling, and particle transport effects which are being observed and analyzed.This research environment is ideal for graduate student and post-doctoral training. The research has strong interdisciplinary connections with atomic physics, fluid dynamics, and statistical mechanics, as well as relevance to fusion plasmas.This research is also funded by DoE under a separate award under the NSF-DoE Partnership in Plasma Science and Engineering joint solicitation.

等离子体的基本过程。C.F.奥尼尔Drivel和D.H.E. Dubin这三个UCSD教师的合作将解决等离子体中广泛的基本过程，并将强调可以获得精确的理论实验测试的问题。 实验将在相机诊断的纯电子等离子体和激光诊断的纯离子等离子体上进行。该研究将包括6个一般领域的工作：1）关于通过等离子体碰撞形成和弛豫的反氢理论工作将继续进行，范围从奥尼尔的“引导中心原子”制度到更深层次的混沌制度。2）实验现在已经测量了强相关等离子体中的垂直平行碰撞的Salpeter增强，未来的工作将定量测试理论想法并将其应用于“燃烧前沿”传播动力学。3）关于长距离ExB漂移相互作用的实验和理论将继续进行，表征热输运、粘度和受背景剪切流限制的粒子输运，利用激光标记对难以捉摸的热激发对流单元进行成像。4）实验将量化新的“电子声学模式”中的波相干粒子分布函数，在理论支持下理解这些非线性波的极端频率变化性。5）将继续关于二维流体涡旋动力学、无粘波阻尼和“涡旋晶体”的实验和理论，包括这些新状态的统计力学描述。6）实验和理论将发展新经典输运的新的“混沌散射”机制，当θ-波纹捕获分离器被等离子体旋转驱动时，这种机制就会发生。 这项工作可能是“变革性的”，给出了广泛的波阻尼，非线性波耦合，和粒子输运效应正在观察和分析。这种研究环境是理想的研究生和博士后培训。 该研究与原子物理学、流体动力学和统计力学以及与聚变等离子体的相关性有很强的跨学科联系。该研究也由能源部在NSF-能源部等离子体科学与工程合作伙伴关系联合征集下的单独奖项下资助。