The proton pressure tensor as a new proxy of the proton decoupling region in collisionless magnetic reconnection
The proton pressure tensor as a new proxy of the proton decoupling region in collisionless magnetic reconnection
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DOI：
10.5194/angeo-29-1571-2011
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发表时间：
2011-09
影响因子：
1.9
通讯作者：
N. Aunai;A. Retinò;G. Belmont;R. Smets;B. Lavraud;A. Vaivads
中科院分区：
文献类型：
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作者：
N. Aunai;A. Retinò;G. Belmont;R. Smets;B. Lavraud;A. Vaivads
通过对星系团数据的分析，检验了质子压力张量的变化作为无碰撞磁场重联中质子退耦区域的代表。在质子退耦区域中产生的霍尔电势阱导致质子的反弹轨迹，其表现为该区域中质子压力张量的面内非对角分量之一的特征变化。在本文中研究的事件被发现是一致的经典霍尔场签名与可能的20%的引导场。此外，这个压力张量分量，磁场和整体流量之间的相关性提出和验证，连同预期的逆流质子分布函数。
Cluster data is analyzed to test the proton pressure tensor variations as a proxy of the proton decoupling region in collisionless magnetic reconnection. The Hall electric potential well created in the proton decoupling region results in bounce trajectories of the protons which appears as a characteristic variation of one of the in-plane off-diagonal components of the proton pressure tensor in this region. The event studied in this paper is found to be consistent with classical Hall field signatures with a possible 20% guide field. Moreover, correlations between this pressure tensor component, magnetic field and bulk flow are proposed and validated, together with the expected counterstreaming proton distribution functions.