Laboratory investigations of sheared-flow effects on instabilities for flow either parallel or perpendicular to the magnetic field

剪切流对平行或垂直于磁场的流动不稳定性影响的实验室研究

• 批准号: 0613238
• 负责人: Mark Koepke
• 金额: --
• 依托单位: West Virginia University Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-07-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0613238&HistoricalAwards=false
• 关键词: Laboratory; investigations; sheared; flow; effects

The general theme for this project is laboratory investigation of plasma instabilities generated by shear flows. The project consists of 4 separate sub-projects, each of which is being investigated by a graduate student. Three of the four experiments will be performed on plasma machines located at West Virginia University (WVU). The fourth experiment will be performed at the Large Plasma Device(LaPD) facility located at UCLA.The three sub-projects that will be investigated at WVU are: (1) kinetic Buneman waves produced by shear in the electron flows parallel to the magnetic field., (2) the non-linear evolution of Farley-Buneman waves, and (3) perpendicular velocity shear effects on drift-wave induced energy transport. The fourth project, which will be done at LaPD, will investigate stationary inertial Alfven waves and their influence on spatial and temporal fluctuations of plasma density and electron acceleration. Three of the four subprojects have significant relevance to space plasma phenomena and in particular to phenomena in the ionospheric auroral zone. The project on velocity-shear instabilities excited in toroidal geometry is a more basic plasma science study that has particular relevance to plasma fusion devices.

这个项目的总主题是由剪切流产生的等离子体不稳定性的实验室研究。 该项目由4个独立的子项目组成，每个子项目都由一名研究生进行调查。 四个实验中的三个将在位于西弗吉尼亚大学（WVU）的等离子体机器上进行。 第四个实验将在位于UCLA的Large Plasma Device（LaPD）设施中进行，WVU将研究的三个子项目分别是：（1）平行于磁场的电子流中剪切产生的动力学布尼曼波(2)Farley-Buneman波的非线性演化;（3）垂直速度切变对漂移波能量输运的影响。 第四个项目将在LaPD完成，将研究静止惯性阿尔芬波及其对等离子体密度和电子加速的空间和时间波动的影响。 四个分项目中有三个与空间等离子体现象，特别是电离层极光区的现象密切相关。 关于在环形几何形状中激发的速度剪切不稳定性的项目是一项更基本的等离子体科学研究，与等离子体聚变装置特别相关。