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Plasma acceleration on multiscale temporal variations of electric and magnetic fields during substorm dipolarization in the Earth’s magnetotailстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 20 августа 2018 г.
- Авторы: Zhukova E.I., Malova H.V., Grigorenko E.E., Popov V.Yu, Petrukovich A.A., Delcourt D.C., Kronberg E.A., Daly P.W., Zelenyi L.M.
- Журнал: Annals of Geophysics
- Том: 61
- Номер: 3
- Год издания: 2018
- Издательство: Editrice Compositori srl
- Местоположение издательства: Italy
- Первая страница: 1
- Последняя страница: 10
- DOI: 10.4401/ag-7582
- Аннотация: Magnetic field dipolarizations are often observed in the magnetotail during substorms. These generally include three temporal scales: (1) actual dipolarization when the normal magnetic field changes during several minutes from minimum to maximum level; (2) sharp Bz bursts (pulses) interpreted as the passage of multiple dipolarization fronts with characteristic time scales < 1 min, and (3) bursts of electric and magnetic fluctuations with frequencies up to electron gyrofrequency occurring at the smallest time scales (≤ 1 s). We present a numerical model where the contributions of the above processes (1)-(3) in particle acceleration are analyzed. It is shown that these processes have a resonant character at different temporal scales. While O+ ions are more likely accelerated due to the mechanism (1), H+ ions (and to some extent electrons) are effectively accelerated due to the second mechanism. High-frequency electric and magnetic fluctuations accompanying magnetic dipolarization as in (3) are also found to efficiently accelerate electrons.
- Добавил в систему: Попов Виктор Юрьевич