Turbulent dipolarization regions in the Earth’s magnetotail: ion fluxes and magnetic field changes
In this work, we consider the dynamics of ion fluxes and magnetic field changes in turbulent regions of magnetotail dipolarizations. The data from the Cluster-II mission (magnetic field measurements from fluxgate magnetometers and energetic charged particle observations from RAPID spectrometers) wer...
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| Format: | Article |
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Frontiers Media S.A.
2023-10-01
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| Series: | Frontiers in Astronomy and Space Sciences |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fspas.2023.1226200/full |
| _version_ | 1797660684068061184 |
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| author | Liudmyla Kozak Liudmyla Kozak Elena A. Kronberg Bohdan Petrenko Bohdan Petrenko Aljona Blöcker Roman Akhmetshyn Istvan Ballai Viktor Fedun |
| author_facet | Liudmyla Kozak Liudmyla Kozak Elena A. Kronberg Bohdan Petrenko Bohdan Petrenko Aljona Blöcker Roman Akhmetshyn Istvan Ballai Viktor Fedun |
| author_sort | Liudmyla Kozak |
| collection | DOAJ |
| description | In this work, we consider the dynamics of ion fluxes and magnetic field changes in turbulent regions of magnetotail dipolarizations. The data from the Cluster-II mission (magnetic field measurements from fluxgate magnetometers and energetic charged particle observations from RAPID spectrometers) were used for the analysis. We study individual events and investigate statistically the changes of charged particle fluxes during magnetic field dipolarizations observed during 2001–2015. Received changes in the spectral index indicate that CNO+ ions undergo stronger acceleration during dipolarization than protons and helium ions. Before dipolarization front monotonic growth the ions flux is observed (the maximum of flux is observed at 1–1,5 min after the start of dipolarization) in the range of ∼ 92–374 keV for proton; in the energy range ∼ 138–235 keV for He+ and in the energy range of 414–638 keV for CNO+ ions. Flux increase before arriving dipolarization front may result from the reflection of plasma sheet ions at the dipolarization front and the result of the resonant interactions of ions with low-frequency electromagnetic waves. |
| first_indexed | 2024-03-11T18:33:26Z |
| format | Article |
| id | doaj.art-f21f7960254a4e8d8bf5b9e55fd51af5 |
| institution | Directory Open Access Journal |
| issn | 2296-987X |
| language | English |
| last_indexed | 2024-03-11T18:33:26Z |
| publishDate | 2023-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Astronomy and Space Sciences |
| spelling | doaj.art-f21f7960254a4e8d8bf5b9e55fd51af52023-10-13T08:07:01ZengFrontiers Media S.A.Frontiers in Astronomy and Space Sciences2296-987X2023-10-011010.3389/fspas.2023.12262001226200Turbulent dipolarization regions in the Earth’s magnetotail: ion fluxes and magnetic field changesLiudmyla Kozak0Liudmyla Kozak1Elena A. Kronberg2Bohdan Petrenko3Bohdan Petrenko4Aljona Blöcker5Roman Akhmetshyn6Istvan Ballai7Viktor Fedun8Department Astronomy and Space Physics, Taras Shevchenko National University of Kyiv, Kyiv, UkraineSpace Research Institute of the National Academy of Sciences of Ukraine, The State Space Academy of Ukraine, Kyiv, UkraineGeophysics, Department of Earth and Environmental Sciences, University of Munich, Munich, GermanyDepartment Astronomy and Space Physics, Taras Shevchenko National University of Kyiv, Kyiv, UkraineSpace Research Institute of the National Academy of Sciences of Ukraine, The State Space Academy of Ukraine, Kyiv, UkraineGeophysics, Department of Earth and Environmental Sciences, University of Munich, Munich, GermanyDepartment Astronomy and Space Physics, Taras Shevchenko National University of Kyiv, Kyiv, UkrainePlasma Dynamics Group, School of Mathematics and Statistics, The University of Sheffield, Sheffield, United KingdomPlasma Dynamics Group, Department of Automatic Control and Systems Engineering, The University of Sheffield, Sheffield, United KingdomIn this work, we consider the dynamics of ion fluxes and magnetic field changes in turbulent regions of magnetotail dipolarizations. The data from the Cluster-II mission (magnetic field measurements from fluxgate magnetometers and energetic charged particle observations from RAPID spectrometers) were used for the analysis. We study individual events and investigate statistically the changes of charged particle fluxes during magnetic field dipolarizations observed during 2001–2015. Received changes in the spectral index indicate that CNO+ ions undergo stronger acceleration during dipolarization than protons and helium ions. Before dipolarization front monotonic growth the ions flux is observed (the maximum of flux is observed at 1–1,5 min after the start of dipolarization) in the range of ∼ 92–374 keV for proton; in the energy range ∼ 138–235 keV for He+ and in the energy range of 414–638 keV for CNO+ ions. Flux increase before arriving dipolarization front may result from the reflection of plasma sheet ions at the dipolarization front and the result of the resonant interactions of ions with low-frequency electromagnetic waves.https://www.frontiersin.org/articles/10.3389/fspas.2023.1226200/fulldipolarization frontscharged particlesdifferential fluxeswavessuperimposed epoch analysis |
| spellingShingle | Liudmyla Kozak Liudmyla Kozak Elena A. Kronberg Bohdan Petrenko Bohdan Petrenko Aljona Blöcker Roman Akhmetshyn Istvan Ballai Viktor Fedun Turbulent dipolarization regions in the Earth’s magnetotail: ion fluxes and magnetic field changes Frontiers in Astronomy and Space Sciences dipolarization fronts charged particles differential fluxes waves superimposed epoch analysis |
| title | Turbulent dipolarization regions in the Earth’s magnetotail: ion fluxes and magnetic field changes |
| title_full | Turbulent dipolarization regions in the Earth’s magnetotail: ion fluxes and magnetic field changes |
| title_fullStr | Turbulent dipolarization regions in the Earth’s magnetotail: ion fluxes and magnetic field changes |
| title_full_unstemmed | Turbulent dipolarization regions in the Earth’s magnetotail: ion fluxes and magnetic field changes |
| title_short | Turbulent dipolarization regions in the Earth’s magnetotail: ion fluxes and magnetic field changes |
| title_sort | turbulent dipolarization regions in the earth s magnetotail ion fluxes and magnetic field changes |
| topic | dipolarization fronts charged particles differential fluxes waves superimposed epoch analysis |
| url | https://www.frontiersin.org/articles/10.3389/fspas.2023.1226200/full |
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