GEM: Turbulence and Structure in the Magnetospheric Cusps: Cluster Spacecraft Observations and Numerical Simulations
GEM:磁层尖端的湍流和结构:集群航天器观测和数值模拟
基本信息
- 批准号:0703327
- 负责人:
- 金额:$ 23.35万
- 依托单位:
- 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:2007-06-01 至 2011-05-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The primary goal of this project is to understand the formation of structure, boundaries and low frequency turbulence in the high-altitude cusp and to study particle acceleration due to the motion of the structures, magnetic reconnection and low frequency turbulence. The investigation will use several years of Cluster satellite data complemented with Double Star satellite data in the magnetosheath. Data analysis methods include variance analysis techniques, transforming observations into the deHoffman Teller frame of reference, use of the Walen relation, multi-spacecraft methods, and spectral analysis methods such as Fast Fourier Transform and Wavelet analysis. The data analysis results will be compared with three-dimensional high-resolution MHD simulations in the cusp geometry. Virtual spacecraft measurements can be taken in the simulation box and compared with satellite data. The simulations will also use test particles. The study will address several specific topics: (1) The formation of diamagnetic cavities and other boundaries in the cusp, (2) the role of Kelvin-Helmholtz modes and reconnection as generators of low frequency turbulence in the cusp, (3) the effect of sheath turbulence on cusp turbulence, and (4) the effect of (i) the motion of the diamagnetic cavities, (ii) reconnection, and (iii) low frequency wave turbulence on particle acceleration in the cusp. The project integrates research and education by including undergraduate students of Embry-Riddle Aeronautical University (ERAU) in a summer research program. The PI will also generate a project website that makes it easy and interesting for the undergraduate students in ERAU (but also for a broader audience) to get familiar with the project and learn space science through it. The ERAU is promoting equal opportunities for the underrepresented groups and the PI will follow this tradition when nominating students for this project.
本项目的主要目标是了解高海拔尖端的结构、边界和低频湍流的形成,并研究结构运动、磁重联和低频湍流引起的粒子加速度。这项调查将使用几年的星团卫星数据和双星卫星在磁鞘中的数据。数据分析方法包括方差分析技术,将观测值转换为deHoffman Teller参照系,使用Walen关系,多航天器方法以及快速傅里叶变换和小波分析等光谱分析方法。数据分析结果将与尖端几何的三维高分辨率MHD模拟结果进行比较。虚拟航天器测量可以在仿真箱中进行,并与卫星数据进行比较。模拟还将使用测试粒子。该研究将涉及几个具体的主题:(1)在尖端中抗磁腔和其他边界的形成,(2)开尔文-亥姆霍兹模式和重连接作为尖端低频湍流的发生器的作用,(3)鞘层湍流对尖端湍流的影响,以及(4)(i)抗磁腔的运动,(ii)重连接和(iii)低频波湍流对尖端粒子加速度的影响。该项目通过将安柏瑞德航空大学(ERAU)的本科生纳入暑期研究项目,将研究与教育相结合。该项目还将创建一个项目网站,使ERAU的本科生(以及更广泛的受众)更容易和有趣地熟悉该项目并通过它学习空间科学。ERAU正在促进代表性不足群体的平等机会,PI在为该项目提名学生时将遵循这一传统。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Katariina Nykyri其他文献
Katariina Nykyri的其他文献
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{{ truncateString('Katariina Nykyri', 18)}}的其他基金
GEM: Experimental Identification of Plasma Wave Modes in Vicinity of Kelvin-Helmholtz (KH) Vortices and in Plasma 'Mixing' Regions in Low Latitude Boundary Layer
GEM:开尔文-亥姆霍兹 (KH) 涡旋附近和低纬度边界层等离子体“混合”区域中等离子体波模式的实验识别
- 批准号:
1707521 - 财政年份:2017
- 资助金额:
$ 23.35万 - 项目类别:
Standard Grant
GEM: Experimental Identification of Plasma Wave Modes in Vicinity of KH Vortices and in Plasma 'Mixing' Regions in Low Latitude Boundary Layer
GEM:KH 涡旋附近和低纬边界层等离子体“混合”区域等离子体波模式的实验识别
- 批准号:
1502774 - 财政年份:2015
- 资助金额:
$ 23.35万 - 项目类别:
Continuing Grant
CAREER: Effects of the Magnetosheath Properties on the Dynamics and Plasma Transport Produced by the Kelvin-Helmholtz Instability and on the Plasma Sheet Anisotropies
职业:磁鞘特性对开尔文-亥姆霍兹不稳定性产生的动力学和等离子体传输以及等离子体片各向异性的影响
- 批准号:
0847120 - 财政年份:2009
- 资助金额:
$ 23.35万 - 项目类别:
Standard Grant
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