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首页> 外文会议>Cluster and double star symposium >CLUSTER RESULTS ON THE MAGNETOTAIL CURRENT SHEETSTRUCTURE AND DYNAMICS
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CLUSTER RESULTS ON THE MAGNETOTAIL CURRENT SHEETSTRUCTURE AND DYNAMICS

机译：磁悬浮电流板结构和动力学的集群结果

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First years of Cluster data analysis have started tornjustify large expectations of community by providing arnnew level of understanding of space plasma dynamics.rnWe briefly summarize the state of art in two aspects,rnconcerning the tail current sheet (CS) dynamics, and itsrnstructure. Both issues are central for understanding ofrnthe tail stability (including substorms) and in both casesrnour view drastically changed from previous picture.rnWith greatly advanced capabilities of measuringrngradients and propagation Cluster made clear thatrnprevious picture of smooth and almost planar sheets isrnrarely applied. Real sheet dynamics often includesrnlarge-amplitude meso-scale sheet corrugations in whichrnthe sheet (1) is strongly deformed and tilted, (2)thernperturbation has a kink-like properties (with CS normalrnrotating in YZ plane) and (3) propagates systematicallyrnfrom central tail part toward its flanks. Thernformation/propagation mechanisms are under the studyrnalthough many facts point out to their close relationshiprnto substorm activations and BBF generation. On thernother hand, fast current sheet crossings werernsystematically exploited to investigate the sheetrnstructure. Whereas the thin embedded as well asrnbifurcated sheet patterns were shown to occur often, thernmajor finding is that, unlike the pre-Cluster era in whichrnthe Harris-type model was exclusively used, we arernactually in a world of essentially non-Harris andrnvariable plasma distributions. This change requires a bigrneffort in theoretical studies, both findings stimulated arnburst of activity in the plasma theory of space currentrnsheets.
机译：集群数据分析的头几年开始通过提供对空间等离子体动力学的全新认识来重新调整对社区的期望。我们在两个方面简要概述了现有技术，涉及尾电流表（CS）动力学及其结构。这两个问题对于理解尾部稳定性（包括亚暴风雨）都是至关重要的，在这两种情况下，视图都与以前的图片相比发生了很大的变化。随着测量梯度和传播的能力非常先进，Cluster明确指出，很少使用光滑和几乎平坦的薄片。实际的板料动力学通常包括大幅度的中尺度板料波纹，其中板料（1）强烈变形和倾斜，（2）热扰动具有扭结状特性（CS法线在YZ平面旋转），（3）从中心尾部系统地传播朝向侧面。尽管许多事实指出了它们的形成/传播机制与亚暴雨的激活和BBF的产生有着密切的关系。另一方面，系统快速地利用了快速的电流穿越来研究板的结构。尽管显示出经常出现薄嵌入和分叉的片状图案，但主要发现是，不同于仅使用Harris型模型的前集群时代，我们实际上处于一个基本上非哈里斯和可变血浆分布的世界。这种变化需要在理论研究中付出巨大的努力，这两个发现刺激了空间电流片的等离子体理论中的活跃度。

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  • 会议地点 Noordwijk(NL);Noordwijk(NL)
  • 作者

    V. Sergeev; A. Runov; W. Baumjohann; R. Nakamura; T.L.Zhang; S. Apatenkov; A. Balogh; H. Reme; J.-A. Sauvaud;

  • 作者单位

    Institute of Physics St.Petersburg University, Ulyanovskaya 1,198504 St.Petersburg, Russiarn(victor@geo.phys.spbu.ru);

    Space Research Institute, Austrian Academy of Sciences, Graz, Austria;

    Space Research Institute, Austrian Academy of Sciences, Graz, Austria;

    Space Research Institute, Austrian Academy of Sciences, Graz, Austria;

    Space Research Institute, Austrian Academy of Sciences, Graz, Austria;

    Institute of Physics St.Petersburg University, Ulyanovskaya 1,198504 St.Petersburg, Russia;

    Imperial College, London, UK;

    CESR, Toulouse, France;

    CESR, Toulouse, France;

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