GEM Postdoc: Dawnside Proton-Cyclotron Interactions and Their Implications for the Proton Aurora

GEM 博士后：Dawnside 质子回旋加速器相互作用及其对质子极光的影响

• 批准号: 0524825
• 负责人: Umran Inan
• 金额: --
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-11-01 至 2008-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0524825&HistoricalAwards=false
• 关键词: GEM; Postdoc; Dawnside; Proton; Cyclotron

This is a two-year study to understand the dynamics of electromagnetic ion cyclotron (EMIC) wave generation in the outer morningside magnetosphere and the role of these waves in the transfer of energy from the magnetosphere to the ionosphere. Wave-particle interactions in the Earth's magnetosphere provide an important mechanism for the transfer of energy and momentum between various plasma populations and from the magnetosphere to the ionosphere. The proposed work will focus on proton ion-cyclotron interactions in the morning sector outer magnetosphere, a spatial region that is known to be conducive to EMIC wave growth. The study will examine under what magnetospheric conditions the waves are generated and role that these waves play in inducing precipitation of low energy ( 5 keV) protons into the upper atmosphere. A multi-spacecraft approach will be employed combining local measurements of EMIC waves and associated particle distributions available from the Polar spacecraft along with global observations of the proton aurora provided by the IMAGE spacecraft. The proposed investigation will quantitatively correlate observations of the proton aurora with the occurrence of waves in the equatorial magnetosphere. The contribution of protons to auroral energy input will be quantified at times when wave-induced scattering is occurring. There are several broader impacts of the proposed research. First of all, the research will be carried out by a young, woman scientist and thus serves to broaden participation and enhance diversity in NSF programs. The proposed work relies heavily upon the assimilation of data from multiple institutions and builds upon previous successful collaborations with industry (Lockheed-Martin), government laboratories (Los Alamos) and among universities. Strengthening these partnerships will promote the education and training of a young scientist and ultimately benefit the scientific community.

这是一项为期两年的研究，旨在了解晨侧磁层外层电磁离子回旋波产生的动力学以及这些波在能量从磁层转移到电离层中的作用。地球磁层中的波粒相互作用为各种等离子体群之间以及从磁层到电离层的能量和动量转移提供了重要机制。拟议的工作将侧重于质子离子回旋相互作用的早晨部门外磁层，一个空间区域，是已知的是有利于EMIC波的增长。这项研究将审查在什么样的磁层条件下产生的波，以及这些波在诱导低能（5千电子伏）质子进入高层大气的沉淀方面发挥的作用。将采用多航天器方法，将极地航天器提供的EMIC波和相关粒子分布的当地测量结果沿着IMAGE航天器提供的质子极光全球观测结果结合起来。拟议的调查将把质子极光观测与赤道磁层波动的发生定量地联系起来。质子对极光能量输入的贡献将在波致散射发生时进行量化。拟议的研究有几个更广泛的影响。首先，这项研究将由一名年轻的女科学家进行，从而有助于扩大参与并增强NSF计划的多样性。拟议的工作在很大程度上依赖于对来自多个机构的数据的同化，并建立在以前与工业（洛克希德马丁公司），政府实验室（洛斯阿拉莫斯）和大学之间的成功合作的基础上。加强这些伙伴关系将促进对青年科学家的教育和培训，并最终使科学界受益。