Ponderomotive redistribution of heavy ions along a magnetic field line
We set up the problem of ponderomotive separation and acceleration of ions with different charge-to-mass ratios under the influence of Alfvén waves, which constantly exist in the magnetosphere in the form of geomagnetic pulsations. Formulas for partial ponderomotive forces acting on light and heavy...
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INFRA-M
2024-12-01
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| Series: | Solar-Terrestrial Physics |
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| Online Access: | https://naukaru.ru/en/nauka/article/82800/view |
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| author | Guglielmi A. V. Feygin F. Z. Potapov A. S. |
| author_facet | Guglielmi A. V. Feygin F. Z. Potapov A. S. |
| author_sort | Guglielmi A. V. |
| collection | DOAJ |
| description | We set up the problem of ponderomotive separation and acceleration of ions with different charge-to-mass ratios under the influence of Alfvén waves, which constantly exist in the magnetosphere in the form of geomagnetic pulsations. Formulas for partial ponderomotive forces acting on light and heavy (metallic) ions are derived. In the quasi-hydrodynamic approximation, a system of equations is obtained which describes the distribution of ions along magnetic field lines in Earth’s magnetosphere. The Clarke number, which characterizes plasma metallicity, is found to be maximum at a minimum magnetic field on the field line along which the Alfvén wave propagates. This leads to the accumulation of heavy ions at the top of the field line at the point of its intersection with the magnetic equator. The theoretical conclusions agree with satellite measurements of the distribution of heavy ions along field lines in Earth’s magnetosphere. |
| format | Article |
| id | doaj-art-792fa2f5e532403dad45ba78ca573a73 |
| institution | OA Journals |
| issn | 2500-0535 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | INFRA-M |
| record_format | Article |
| series | Solar-Terrestrial Physics |
| spelling | doaj-art-792fa2f5e532403dad45ba78ca573a732025-08-20T02:32:27ZengINFRA-MSolar-Terrestrial Physics2500-05352024-12-01104141810.12737/stp-104202402Ponderomotive redistribution of heavy ions along a magnetic field lineGuglielmi A. V.0Feygin F. Z.1Potapov A. S.2Schmidt Institute of Physics of the Earth RAS, Moscow, RussiaSchmidt Institute of Physics of the Earth RAS, Moscow, RussiaInstitute of Solar-Terrestrial Physics SB RAS, Irkutsk, RussiaWe set up the problem of ponderomotive separation and acceleration of ions with different charge-to-mass ratios under the influence of Alfvén waves, which constantly exist in the magnetosphere in the form of geomagnetic pulsations. Formulas for partial ponderomotive forces acting on light and heavy (metallic) ions are derived. In the quasi-hydrodynamic approximation, a system of equations is obtained which describes the distribution of ions along magnetic field lines in Earth’s magnetosphere. The Clarke number, which characterizes plasma metallicity, is found to be maximum at a minimum magnetic field on the field line along which the Alfvén wave propagates. This leads to the accumulation of heavy ions at the top of the field line at the point of its intersection with the magnetic equator. The theoretical conclusions agree with satellite measurements of the distribution of heavy ions along field lines in Earth’s magnetosphere.https://naukaru.ru/en/nauka/article/82800/viewpartial ponderomotive forcesalfvén wavesheavy ionsambipolar diffusiongeomagnetic fieldclarke number |
| spellingShingle | Guglielmi A. V. Feygin F. Z. Potapov A. S. Ponderomotive redistribution of heavy ions along a magnetic field line Solar-Terrestrial Physics partial ponderomotive forces alfvén waves heavy ions ambipolar diffusion geomagnetic field clarke number |
| title | Ponderomotive redistribution of heavy ions along a magnetic field line |
| title_full | Ponderomotive redistribution of heavy ions along a magnetic field line |
| title_fullStr | Ponderomotive redistribution of heavy ions along a magnetic field line |
| title_full_unstemmed | Ponderomotive redistribution of heavy ions along a magnetic field line |
| title_short | Ponderomotive redistribution of heavy ions along a magnetic field line |
| title_sort | ponderomotive redistribution of heavy ions along a magnetic field line |
| topic | partial ponderomotive forces alfvén waves heavy ions ambipolar diffusion geomagnetic field clarke number |
| url | https://naukaru.ru/en/nauka/article/82800/view |
| work_keys_str_mv | AT guglielmiav ponderomotiveredistributionofheavyionsalongamagneticfieldline AT feyginfz ponderomotiveredistributionofheavyionsalongamagneticfieldline AT potapovas ponderomotiveredistributionofheavyionsalongamagneticfieldline |