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首页> 外文期刊>Plasma physics and controlled fusion >Formation of sub-ion scale filamentary force-free structures in the vicinity of reconnection region
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Formation of sub-ion scale filamentary force-free structures in the vicinity of reconnection region

机译：在重新连接区域附近形成亚离子级无丝状力的结构

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摘要

In this paper we review the results of spacecraft observations of current sheets (CSs) of sub-ion spatial scales in the Earth's magnetotail as well as experiments with these structures in laboratory devices. We demonstrate that such sub-ion CSs having a thickness less than the ion gyroradius are usually formed in the vicinity of the magnetic reconnection region and are supported by strong electron currents flowing along magnetic field lines. The magnetic field configuration of sub-ion CSs is close to the force-free configuration, with a strong shear magnetic field component in the CS central region. Spacecraft observations suggest that parallel electron currents are generated by electron beams (pronounced enhancement of the phase space density for electrons with small pitch angles and energies similar to 1-3 keV). We discuss several models describing such force-free sub-ion CSs.
机译：在本文中，我们回顾了航天器对地球磁尾中亚离子空间尺度的当前工作表（CS）的观测结果，以及在实验室设备中对这些结构进行的实验。我们证明，这种厚度小于离子陀螺半径的亚离子CSs通常形成在磁重连区附近，并由沿磁场线流动的强电子流支撑。子离子CS的磁场配置接近于无力配置，在CS中心区域具有很强的剪切磁场分量。航天器的观测结果表明，电子束会产生平行的电子电流（对于间距角较小且能量类似于1-3 keV的电子，相空间密度的明显增强）。我们讨论了描述这种无力子离子CS的几种模型。

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