Modeling of Magnetic Dipolarizations and Turbulence in Earth’s Magnetotail as Factors of Plasma Acceleration and Transfer
- Авторы: Parkhomenko E.I.1, Malova H.V.1,2, Popov V.Y.1,3,4, Grigorenko E.E.1, Petrukovich A.A.1, Zelenyi L.M.1, Kronberg E.A.5,6
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Учреждения:
- Space Research Institute, Russian Academy of Sciences
- Skobeltsyn Research Institute of Nuclear Physics, Moscow State University
- Faculty of Physics, Moscow State University
- National Research University Higher School of Economics
- Max Planck Institute for Solar System Research
- Ludwig Maximilian University of Munich
- Выпуск: Том 56, № 6 (2018)
- Страницы: 453-461
- Раздел: Article
- URL: https://journals.rcsi.science/0010-9525/article/view/153469
- DOI: https://doi.org/10.1134/S0010952518060084
- ID: 153469
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Аннотация
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.
Об авторах
E. Parkhomenko
Space Research Institute, Russian Academy of Sciences
Автор, ответственный за переписку.
Email: jookove@mail.ru
Россия, Moscow, 117997
H. Malova
Space Research Institute, Russian Academy of Sciences; Skobeltsyn Research Institute of Nuclear Physics, Moscow State University
Автор, ответственный за переписку.
Email: hmalova@yandex.ru
Россия, Moscow, 117997; Moscow, 119899
V. Popov
Space Research Institute, Russian Academy of Sciences; Faculty of Physics, Moscow State University; National Research University Higher School of Economics
Email: hmalova@yandex.ru
Россия, Moscow, 117997; Moscow, 119899; Moscow
E. Grigorenko
Space Research Institute, Russian Academy of Sciences
Email: hmalova@yandex.ru
Россия, Moscow, 117997
A. Petrukovich
Space Research Institute, Russian Academy of Sciences
Email: hmalova@yandex.ru
Россия, Moscow, 117997
L. Zelenyi
Space Research Institute, Russian Academy of Sciences
Email: hmalova@yandex.ru
Россия, Moscow, 117997
E. Kronberg
Max Planck Institute for Solar System Research; Ludwig Maximilian University of Munich
Email: hmalova@yandex.ru
Германия, Göttingen; Munich
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