Dynamical Processes in Strongly Coupled Complex Plasmas

强耦合复杂等离子体中的动力学过程

• 批准号: 0715227
• 负责人: Gabor Kalman
• 金额: $ 30万
• 依托单位: Boston College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-01 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0715227&HistoricalAwards=false
• 关键词: Dynamical; Processes; Strongly; Coupled; Complex

Theoretical analysis combined with computer simulation is proposed for continued investigation of the properties of strongly coupled complex (dusty) plasmas. Complex (dusty) plasmas consist of mesoscopic grains immersed in the background of gaseous plasma of electrons, ions and neutral atoms. Such systems occur in a variety of situations. The Proposal addresses problems associated with collective behavior in such systems: i.e. phenomena resulting from the cooperative participation of many particles. Such a collective behavior is the hallmark of strongly coupled systems. Six major areas are proposed for study: (i) magnetic interaction between grains carrying a magnetic dipole moment; (ii) propagation of waves in complex plasmas in two dimensional and three-dimensional configurations; (iii) micro-instabilities generated by beams of ions or grains penetrating into the complex plasma; (iv) stochastic and disordered behavior in complex plasmas; (v) phase transitions in complex plasmas; (vi) feasibility study for the cryogenic generation of complex plasmas on the surface of liquid helium. One of the principal approaches to be used in the proposed investigations relies on an analytic method referred to as the Quasi Localized Charge Approximation that has been successfully used previously. Collaboration with a research group at the Research Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences in Budapest, Hungary on computer simulation will enhance the research program.Broader impacts of the research will contribute to improved understanding of problems of fundamental importance in plasma and condensed matter physics. Establishing techniques suitable for the manipulation of mesoscopic structures will also have impact on engineering applications. Scientific exchanges with several major theoretical and experimental research groups both in the U. S. and overseas will be facilitated. These principles and techniques of strongly coupled plasma physics will be part of a graduate program in the physical and engineering sciences.

建议将理论分析与计算机模拟相结合，以继续研究强耦合复杂（尘埃）等离子体的特性。 复杂（尘埃）等离子体由浸入电子、离子和中性原子气态等离子体背景中的介观颗粒组成。 此类系统出现在多种情况下。 该提案解决了与此类系统中的集体行为相关的问题：即由许多粒子的合作参与产生的现象。 这种集体行为是强耦合系统的标志。 提出了六个主要研究领域：（i）携带磁偶极矩的颗粒之间的磁相互作用； (ii) 波在二维和三维结构的复杂等离子体中的传播； (iii) 离子束或颗粒束穿透复杂等离子体而产生的微观不稳定性； (iv) 复杂等离子体中的随机和无序行为； (v) 复杂等离子体中的相变； (vi) 在液氦表面低温产生复杂等离子体的可行性研究。 拟议研究中使用的主要方法之一依赖于先前已成功使用的称为准局部电荷近似的分析方法。 与匈牙利布达佩斯匈牙利科学院固体物理和光学研究所的一个研究小组在计算机模拟方面的合作将加强该研究计划。该研究的更广泛影响将有助于提高对等离子体和凝聚态物理中具有根本重要性的问题的理解。 建立适合操纵介观结构的技术也将对工程应用产生影响。将促进与美国和海外几个主要理论和实验研究小组的科学交流。 这些强耦合等离子体物理学的原理和技术将成为物理和工程科学研究生课程的一部分。