Proton and heavy ion acceleration by stochastic fluctuations in the Earth's magnetotail
Spacecraft observations show that energetic ions are found in the Earth's magnetotail, with energies ranging from tens of keV to a few hundreds of keV. In this paper we carry out test particle simulations in which protons and other ion species are injected in the Vlasov magnetic field config...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2016-10-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/34/917/2016/angeo-34-917-2016.pdf |
| _version_ | 1818500080008691712 |
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| author | F. Catapano G. Zimbardo S. Perri A. Greco A. V. Artemyev A. V. Artemyev |
| author_facet | F. Catapano G. Zimbardo S. Perri A. Greco A. V. Artemyev A. V. Artemyev |
| author_sort | F. Catapano |
| collection | DOAJ |
| description | Spacecraft observations show that energetic ions are found in the Earth's
magnetotail, with energies ranging from tens of keV to a few hundreds of keV.
In this paper we carry out test particle simulations in which protons and
other ion species are injected in the Vlasov magnetic field configurations
obtained by Catapano et al. (2015). These configurations represent solutions of a
generalized Harris model, which well describes the observed profiles in the
magnetotail. In addition, three-dimensional time-dependent stochastic
electromagnetic perturbations are included in the simulation box, so that the
ion acceleration process is studied while varying the equilibrium magnetic
field profile and the ion species. We find that proton energies of the order
of 100 keV are reached with simulation parameters typical of the Earth's
magnetotail. By changing the ion mass and charge, we can study the acceleration
of heavy ions such as He<sup>+ + </sup> and O<sup>+</sup>, and it is found that energies
of the order of 100–200 keV are reached in a few seconds for He<sup>+ + </sup>, and
about 100 keV for O<sup>+</sup>. |
| first_indexed | 2024-12-10T20:38:08Z |
| format | Article |
| id | doaj.art-8f3b9cdabacd461e9f9e74f725d7f382 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-10T20:38:08Z |
| publishDate | 2016-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-8f3b9cdabacd461e9f9e74f725d7f3822022-12-22T01:34:28ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762016-10-013491792610.5194/angeo-34-917-2016Proton and heavy ion acceleration by stochastic fluctuations in the Earth's magnetotailF. Catapano0G. Zimbardo1S. Perri2A. Greco3A. V. Artemyev4A. V. Artemyev5Department of Physics, University of Calabria, Rende (CS) 87036, ItalyDepartment of Physics, University of Calabria, Rende (CS) 87036, ItalyDepartment of Physics, University of Calabria, Rende (CS) 87036, ItalyDepartment of Physics, University of Calabria, Rende (CS) 87036, ItalySpace Research Institute, Russian Academy of Science, Moscow, RussiaDepartment of Earth, Planetary, and Space Science and Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California, USASpacecraft observations show that energetic ions are found in the Earth's magnetotail, with energies ranging from tens of keV to a few hundreds of keV. In this paper we carry out test particle simulations in which protons and other ion species are injected in the Vlasov magnetic field configurations obtained by Catapano et al. (2015). These configurations represent solutions of a generalized Harris model, which well describes the observed profiles in the magnetotail. In addition, three-dimensional time-dependent stochastic electromagnetic perturbations are included in the simulation box, so that the ion acceleration process is studied while varying the equilibrium magnetic field profile and the ion species. We find that proton energies of the order of 100 keV are reached with simulation parameters typical of the Earth's magnetotail. By changing the ion mass and charge, we can study the acceleration of heavy ions such as He<sup>+ + </sup> and O<sup>+</sup>, and it is found that energies of the order of 100–200 keV are reached in a few seconds for He<sup>+ + </sup>, and about 100 keV for O<sup>+</sup>.https://www.ann-geophys.net/34/917/2016/angeo-34-917-2016.pdf |
| spellingShingle | F. Catapano G. Zimbardo S. Perri A. Greco A. V. Artemyev A. V. Artemyev Proton and heavy ion acceleration by stochastic fluctuations in the Earth's magnetotail Annales Geophysicae |
| title | Proton and heavy ion acceleration by stochastic fluctuations in the Earth's magnetotail |
| title_full | Proton and heavy ion acceleration by stochastic fluctuations in the Earth's magnetotail |
| title_fullStr | Proton and heavy ion acceleration by stochastic fluctuations in the Earth's magnetotail |
| title_full_unstemmed | Proton and heavy ion acceleration by stochastic fluctuations in the Earth's magnetotail |
| title_short | Proton and heavy ion acceleration by stochastic fluctuations in the Earth's magnetotail |
| title_sort | proton and heavy ion acceleration by stochastic fluctuations in the earth s magnetotail |
| url | https://www.ann-geophys.net/34/917/2016/angeo-34-917-2016.pdf |
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