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| Titel |
On the modeling of planetary plasma environments by a fully kinetic electromagnetic global model HYB-em |
| VerfasserIn |
V. Pohjola, E. Kallio |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 28, no. 3 ; Nr. 28, no. 3 (2010-03-15), S.743-751 |
| Datensatznummer |
250016800
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| Publikation (Nr.) |
 copernicus.org/angeo-28-743-2010.pdf |
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| Zusammenfassung |
We have developed a fully kinetic electromagnetic model
to study instabilities and waves in planetary plasma environments.
In the particle-in-a-cell (PIC) model both ions and electrons are
modeled as particles. An important feature of the developed global
kinetic model, called HYB-em, compared to other electromagnetic
codes is that it is built up on an earlier quasi-neutral hybrid
simulation platform called HYB and that it can be used in
conjunction with earlier hybrid models. The HYB models have been
used during the past ten years to study globally the flowing
plasma interaction with various Solar System objects: Mercury,
Venus, the Moon, Mars, Saturnian moon Titan and asteroids. The new
stand-alone fully kinetic model enables us to (1) study the
stability of various planetary plasma regions in three-dimensional
space, (2) analyze the propagation of waves in a plasma
environment derived from the other global HYB models. All particle
processes in a multi-ion plasma which are implemented on the HYB
platform (e.g. ion-neutral-collisions, chemical processes,
particle loss and production processes) are also automatically
included in HYB-em model.
In this brief report we study the developed approach by analyzing
the propagation of high frequency electromagnetic waves in
non-magnetized plasma in two cases: We study (1) expansion of a
spherical wave generated from a point source and (2) propagation
of a plane wave in plasma. The analysis shows that the HYB-em
model is capable of describing these space plasma situations
successfully. The analysis also suggests the potential of the
developed model to study both high density-high magnetic field
plasma environments, such as Mercury, and low density-low magnetic
field plasma environments, such as Venus and Mars. |
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