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  Plasma acceleration on multiscale temporal variations of electric and magnetic fields during substorm dipolarization in the Earth’s magnetotail

Parkhomenko, E. I., Malova, H. V., Grigorenko, E. E., Popov, V. Y., Petrukovich, A. A., Delcourt, D. C., et al. (2018). Plasma acceleration on multiscale temporal variations of electric and magnetic fields during substorm dipolarization in the Earth’s magnetotail. Annals of Geophysics, 61(3): GM334. doi:10.4401/ag-7582.

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 Creators:
Parkhomenko, Elena Igorevna, Author
Malova, Helmi Vitalevna, Author
Grigorenko, Elena Evgenevna, Author
Popov, Victor Yurevich, Author
Petrukovich, Anatolii Alekseevich, Author
Delcourt, Dominique C., Author
Kronberg, Elena A.1, Author              
Daly, Patrick W.1, Author              
Zelenyi, Lev Matveevich, Author
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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Free keywords: Magnetotail, Dipolarization, Electric field fluctuations, Particle acceleration, Numerical modeling
 MPIS_GROUPS: Planetary Plasmas
 MPIS_PROJECTS: Cluster: RAPID
 Abstract: 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 15Bz"> 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.

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Language(s): eng - English
 Dates: 2018-08-222018
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.4401/ag-7582
 Degree: -

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Title: Annals of Geophysics
  Other : Ann. Geophys.
Source Genre: Journal
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Affiliations:
Publ. Info: Bologna : Editrice Compositori
Pages: - Volume / Issue: 61 (3) Sequence Number: GM334 Start / End Page: - Identifier: ISSN: 1593-5213
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000223970_1