EAGER: Addressing Key Unsolved Issues in Reconnection Physics Through Linear Theory of Tearing Instability
EAGER:通过撕裂不稳定性的线性理论解决重联物理中未解决的关键问题
基本信息
- 批准号:1105084
- 负责人:
- 金额:$ 8万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2011
- 资助国家:美国
- 起止时间:2011-07-01 至 2013-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This project will investigate the possibility that a new approach to deriving a linear theory of the tearing mode instability in space plasmas can be successfully developed. Such a linear theory would then form the basis of a full non-linear theory of magnetic reconnection in a collisonless plasma. Previous analytical work on the linear tearing mode relied on using an asymptotic approach to make the equations tractable. However, fullly kinetic, particle simulations have indicated that the asymptotic approach breakes down in most realistic geometries. The purpose of this exploratory resarch is threefold: 1) Determine why the asymptotic appoach breaks down and develop a new approach using an exact linear Vlasov solver to determine the conditions where a direct transition from linear theory to non-linear turbulence occurs; 2) Determine whether or not the formation of secondary tearing island formation is due to a linear instability; 3) Examine the controversial question of whether linear mode properties have a significant influence on the resulting reconnection rate in large systems. This is a project that has the potential to transform the way magnetic reconnection is treated in plasma theory and simulations. It could affect our understanding of phenomena on the sun, in the solar wind, in planetary magnetospheres and in astrophysical plasmas.
本项目将研究是否可能成功地发展一种新的方法来推导空间等离子体撕裂模不稳定性的线性理论。这样一个线性理论将成为无碰撞等离子体中磁重联的完整非线性理论的基础。以前的线性撕裂模式的分析工作依赖于使用渐近方法,使方程易于处理。然而,完全动力学的粒子模拟表明,渐近方法在大多数现实的几何形状中崩溃了。本文的探索性研究有三个目的:(1)确定渐近方法失效的原因,并发展一种新的方法,用精确的线性Vlasov解来确定从线性理论直接过渡到非线性湍流的条件;(2)确定二次撕裂岛的形成是否是由于线性不稳定性; 3)研究有争议的问题,即线性模式特性是否对大型系统中的重联率有重大影响。这是一个有可能改变等离子体理论和模拟中磁重联处理方式的项目。 它可能会影响我们对太阳、太阳风、行星磁层和天体物理等离子体现象的理解。
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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Homayoun Karimabadi其他文献
Homayoun Karimabadi的其他文献
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{{ truncateString('Homayoun Karimabadi', 18)}}的其他基金
Kinetic Study of Flux Transfer Events Enabled by Petascale Computing
通过千万亿次计算实现通量传递事件的动力学研究
- 批准号:
1104815 - 财政年份:2012
- 资助金额:
$ 8万 - 项目类别:
Continuing Grant
Kinetic Physics of Homogeneous Turbulence in Collisionless Plasmas
无碰撞等离子体中均匀湍流的动力学物理
- 批准号:
1004270 - 财政年份:2010
- 资助金额:
$ 8万 - 项目类别:
Standard Grant
Enabling Breakthrough Kinetic Simulations of the Magnetosphere via Petascale Computing
通过千万亿次计算实现磁层的突破性动力学模拟
- 批准号:
1036107 - 财政年份:2010
- 资助金额:
$ 8万 - 项目类别:
Standard Grant
Collaborative Research: Enabling Breakthrough Kinetic Simulations of the Magnetosphere via Multi-zone Petascale Computing
合作研究:通过多区域千万亿次计算实现磁层的突破性动力学模拟
- 批准号:
0904734 - 财政年份:2009
- 资助金额:
$ 8万 - 项目类别:
Standard Grant
GEM: Anti-Parallel and Component Merging Scenarios in Collisionless Reconnection
GEM:无碰撞重连中的反并行和组件合并场景
- 批准号:
0802380 - 财政年份:2008
- 资助金额:
$ 8万 - 项目类别:
Continuing Grant
Collaborative Research: ITR: Global Multi-Scale Kinetic Simulations of the Earth's Magnetosphere Using Parallel Discrete Event Simulation
合作研究:ITR:使用并行离散事件模拟对地球磁层进行全球多尺度动力学模拟
- 批准号:
0539106 - 财政年份:2005
- 资助金额:
$ 8万 - 项目类别:
Continuing Grant
Collaborative Research: ITR: Global Multi-Scale Kinetic Simulations of the Earth's Magnetosphere Using Parallel Discrete Event Simulation
合作研究:ITR:使用并行离散事件模拟对地球磁层进行全球多尺度动力学模拟
- 批准号:
0325046 - 财政年份:2003
- 资助金额:
$ 8万 - 项目类别:
Continuing Grant
Local and Non-local Plasma Transfer Processes at the Dayside Magnetosphere
日侧磁层的局部和非局部等离子体转移过程
- 批准号:
0119846 - 财政年份:2001
- 资助金额:
$ 8万 - 项目类别:
Continuing Grant
Kinetic Simulations of Magnetopause Including Ionospheric Effect
包括电离层效应在内的磁层顶动力学模拟
- 批准号:
9901665 - 财政年份:2000
- 资助金额:
$ 8万 - 项目类别:
Continuing Grant
Formation and Kinetic Structure of Discontinuities at the Earth's Magnetopause and at the Magnetotail
地球磁顶和磁尾不连续性的形成和动力学结构
- 批准号:
9614176 - 财政年份:1997
- 资助金额:
$ 8万 - 项目类别:
Continuing Grant
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