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首页> 外文期刊>Cosmic research >Modeling of Magnetic Dipolarizations and Turbulence in Earth's Magnetotail as Factors of Plasma Acceleration and Transfer
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Modeling of Magnetic Dipolarizations and Turbulence in Earth's Magnetotail as Factors of Plasma Acceleration and Transfer

机译：地球磁尾中的磁偶极极化和湍流作为等离子体加速和转移因素的建模

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The paper is devoted to studying processes of plasma particle acceleration in the process of magnetic dipolarizations in a current sheet of Earth's magnetotail. A numerical model is constructed that allows evaluation of particle acceleration in three possible scenarios: (A) Proper dipolarization; (B) Passage of multiple dipolarization fronts; (C) Passage of fronts followed by high-frequency electromagnetic oscillations. The energy spectra of three types of accelerated particles are obtained: hydrogen H+ and oxygen O+ ions and electrons e(-). It is shown that, at different time scales, predominant acceleration of various particle populations occurs in scenarios (A)-(C). Oxygen ions are accelerated most efficiently in single dipolarization process (A), protons (and, to some extent, electrons), in scenario (B), whereas scenario (C) is most efficient for acceleration of electrons. It is shown that accounting for high-frequency electromagnetic fluctuations, accompanying magnetic dipolarization, may explain the appearance of streams of particles with energies on the order of hundreds of keV in Earth's magnetotail.
机译：该论文致力于研究当前地球磁尾中磁双极化过程中的等离子体粒子加速过程。建立了一个数值模型，可以在三种可能的情况下评估粒子的加速度：（A）正确的双极化； （B）通过多个双极化战线； （C）前沿通过，随后发生高频电磁振荡。获得了三种类型的加速粒子的能谱：氢H +和氧O +离子以及电子e（-）。结果表明，在不同的时标下，场景（A）-（C）中发生了各种粒子群的显着加速。在场景（B）中，氧离子在单个双极化过程（A）中最有效地加速，质子（在某种程度上为电子）中加速，而场景（C）对于电子加速效率最高。研究表明，伴随电磁双极化的高频电磁波动，可以解释在地球磁尾中能量为数百keV量级的粒子流的出现。

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  • 来源
    《Cosmic research》 |2018年第6期|453-461|共9页
  • 作者

    Parkhomenko E. I.; Malova H. V.; Popov V. Yu.; Grigorenko E. E.; Petrukovich A. A.; Zelenyi L. M.; Kronberg E. A.;

  • 作者单位

    Russian Acad Sci, Space Res Inst, Moscow 117997, Russia;

    Russian Acad Sci, Space Res Inst, Moscow 117997, Russia|Moscow MV Lomonosov State Univ, Skobeltsyn Res Inst Nucl Phys, Moscow 119899, Russia;

    Russian Acad Sci, Space Res Inst, Moscow 117997, Russia|Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119899, Russia|Natl Res Univ Higher Sch Econ, Moscow, Russia;

    Russian Acad Sci, Space Res Inst, Moscow 117997, Russia;

    Russian Acad Sci, Space Res Inst, Moscow 117997, Russia;

    Russian Acad Sci, Space Res Inst, Moscow 117997, Russia;

    Max Planck Inst Solar Syst Res, Gottingen, Germany|Ludwig Maximilian Univ Munich, Munich, Germany;

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