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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Reconstruction of two-dimensional coherent structures in ideal and resistive Hall MHD: The theory
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Reconstruction of two-dimensional coherent structures in ideal and resistive Hall MHD: The theory

机译：重建二维相干在理想和霍尔电阻磁流体动力结构:理论

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摘要

We demonstrate that it is possible, in principle, to use data from a single spacecraft to produce reconstructions of two-dimensional, time-independent field and plasma structures in space, in circumstances where the Hall effect is important. Such reconstruction generates maps, in a limited region around the spacecraft path, of magnetic and electric fields, of flow field and current distributions, as well as of the various other plasma parameters that characterize the configuration. It is similar to recent work applicable to ideal MHD, but requires additionally that at least two components (usually the spacecraft spin-plane components) of the electric field have been directly measured. Principal emphasis is on ideal Hall MHD. For this case we have developed and benchmarked a numerical code by use of an exact axisymmetric solution in which the Hall effect is significant. The case where electrical resistivity is present as well, for example, in resistive-dispersive shocks, is discussed briefly to illustrate that reconstruction is possible in this case also. A principal target of Hall reconstruction, without or with resistivity, is the ion diffusion region around a reconnection site; applications to actual observed structures will be presented elsewhere.
机译：原则上,我们证明了这是可行的使用数据从一个航天器产生二维的重建,长期有效的场和等离子体结构空间,在霍尔效应的情况重要的。宇宙飞船路径,周边地区有限的磁场和电场、流场和目前的分布,以及不同的其他等离子体参数描述配置。适用于理想磁流体动力,但需要此外,至少有两个组件(通常是航天器spin-plane组件)电场直接测量。主要强调理想磁流体动力。我们已经开发和基准测试通过使用一个精确的轴对称数值代码解决方案的霍尔效应是显著的。电阻率的情况,例如,在resistive-dispersive讨论了冲击,简要说明在这种情况下重建是可能的。大厅的主要目标重建,没有与电阻率或离子扩散区域在重新连接网站;将实际观察到的结构其他地方。

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