论文标题
电子压力对湍流电磁场中带电测试颗粒的能量和磁矩的影响
Effect of the electronic pressure on the energy and magnetic moment of charged test particles in turbulent electromagnetic fields
论文作者
论文摘要
在这项工作中，我们对具有背景磁场的三维磁流体动力学进行了直接的数值模拟，代表太阳风等离子体，并引入了测试颗粒，以探索湍流电磁环境如何影响它们。我们的重点是通常被认为不重要的OMH法律中存在的电场条款。这些是大厅和电子压力（EP）项，但我们主要集中在后者上。我们发现，与已知的优先垂直能量相比，EP项会产生颗粒的加速度，该颗粒的加速度与背景磁场的方向相似。通过研究电场本身，我们能够检测产生这种平行加速的EP场结构的类型。这些是薄而拉长的结构，放置在单调和接近零的背景的顶部。还进行了一项了解电子压力项的实际意义的统计研究。
In this work we perform direct numerical simulations of three-dimensional magnetohydrodynamics with a background magnetic field, representing solar wind plasma, and introduce test particles to explore how a turbulent electromagnetic environment affects them. Our focus is on the terms of the electric field present in the generalized Omh's Law that are usually dismissed as unimportant. These are the Hall and the electronic pressure (EP) terms, but we concentrate primarily on the latter. We discover that the EP term generates an acceleration of the particles, which represent protons, in the direction parallel to the background magnetic field, in contrast to the known preferential perpendicular energization. By studying the electric field itself, we are able to detect the type of structures of the EP field that produce such parallel acceleration. These are thin and elongated structures placed on top of a monotonic and near-zero background. A statistical study to understand the real significance of the electronic pressure term is also performed.
