Lower-Hybrid Waves Excited by the Electron-Ion Hybrid Instability

由电子-离子杂化不稳定性激发的低杂化波

• 批准号: 9713157
• 负责人: Mark Koepke
• 金额: $ 28万
• 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: 1997
• 资助国家: 美国
• 起止时间: 1997-09-01 至 2000-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9713157&HistoricalAwards=false
• 关键词: Lower; Hybrid; Waves; Excited; Electron

The proposed research is the first laboratory study of the electron-ion hybrid instability driven by a shear in the cross- field ion drift. The objectives are to (1) excite the EIH mode in the two parameter regimes assoicated with their laoratory device, (2) determine the dependence of the frequency and wave vector spectra on shear parameters, (3) characterize the ion heating induced by EIH waves and its saturation mechanism, and (4) to determine the influence of introducing a second ion species, positively and negatively charges, on items 2 and 3. These experiments are relevant to the interpretation of the dynamically intense geomagnetic activity that arises at the edges of auoral arcs and in black aurora.

这项研究是首次在实验室研究了跨场离子漂移中由剪切驱动的电子-离子混合不稳定性。 目的是（1）在与他们的实验装置相关的两个参数区域中激发EIH模式，（2）确定频率和波矢谱对剪切参数的依赖性，（3）表征由EIH波引起的离子加热及其饱和机制，以及（4）确定引入第二离子种类（正电荷和负电荷）的影响，关于项目2和3。 这些实验与解释极光弧边缘和黑色极光中动态强烈的地磁活动有关。