Wave dispersion in the hybrid-Vlasov model: verification of Vlasiator
Vlasiator is a new hybrid-Vlasov plasma simulation code aimed at simulating the entire magnetosphere of the Earth. The code treats ions (protons) kinetically through Vlasov's equation in the six-dimensional phase space while electrons are a massless charge-neutralizing fluid [M. Palmroth et al....
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ftdatacite:10.48550/arxiv.1311.3793 2023-05-15T17:04:17+02:00 Wave dispersion in the hybrid-Vlasov model: verification of Vlasiator Kempf, Yann Pokhotelov, Dimitry von Alfthan, Sebastian Vaivads, Andris Palmroth, Minna Koskinen, Hannu E. J. 2013 https://dx.doi.org/10.48550/arxiv.1311.3793 https://arxiv.org/abs/1311.3793 unknown arXiv https://dx.doi.org/10.1063/1.4835315 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Plasma Physics physics.plasm-ph Space Physics physics.space-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2013 ftdatacite https://doi.org/10.48550/arxiv.1311.3793 https://doi.org/10.1063/1.4835315 2022-04-01T13:15:53Z Vlasiator is a new hybrid-Vlasov plasma simulation code aimed at simulating the entire magnetosphere of the Earth. The code treats ions (protons) kinetically through Vlasov's equation in the six-dimensional phase space while electrons are a massless charge-neutralizing fluid [M. Palmroth et al., Journal of Atmospheric and Solar-Terrestrial Physics 99, 41 (2013); A. Sandroos et al., Parallel Computing 39, 306 (2013)]. For first global simulations of the magnetosphere, it is critical to verify and validate the model by established methods. Here, as part of the verification of Vlasiator, we characterize the low-$β$ plasma wave modes described by this model and compare with the solution computed by the Waves in Homogeneous, Anisotropic Multicomponent Plasmas (WHAMP) code [K. Rönnmark, Kiruna Geophysical Institute Reports 179 (1982)], using dispersion curves and surfaces produced with both programs. The match between the two fundamentally different approaches is excellent in the low-frequency, long wavelength range which is of interest in global magnetospheric simulations. The left-hand and right-hand polarized wave modes as well as the Bernstein modes in the Vlasiator simulations agree well with the WHAMP solutions. Vlasiator allows a direct investigation of the importance of the Hall term by including it in or excluding it from Ohm's law in simulations. This is illustrated showing examples of waves obtained using the ideal Ohm's law and Ohm's law including the Hall term. Our analysis emphasizes the role of the Hall term in Ohm's law in obtaining wave modes departing from ideal magnetohydrodynamics in the hybrid-Vlasov model. Text Kiruna DataCite Metadata Store (German National Library of Science and Technology) Kiruna |
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Plasma Physics physics.plasm-ph Space Physics physics.space-ph FOS Physical sciences |
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Plasma Physics physics.plasm-ph Space Physics physics.space-ph FOS Physical sciences Kempf, Yann Pokhotelov, Dimitry von Alfthan, Sebastian Vaivads, Andris Palmroth, Minna Koskinen, Hannu E. J. Wave dispersion in the hybrid-Vlasov model: verification of Vlasiator |
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Plasma Physics physics.plasm-ph Space Physics physics.space-ph FOS Physical sciences |
description |
Vlasiator is a new hybrid-Vlasov plasma simulation code aimed at simulating the entire magnetosphere of the Earth. The code treats ions (protons) kinetically through Vlasov's equation in the six-dimensional phase space while electrons are a massless charge-neutralizing fluid [M. Palmroth et al., Journal of Atmospheric and Solar-Terrestrial Physics 99, 41 (2013); A. Sandroos et al., Parallel Computing 39, 306 (2013)]. For first global simulations of the magnetosphere, it is critical to verify and validate the model by established methods. Here, as part of the verification of Vlasiator, we characterize the low-$β$ plasma wave modes described by this model and compare with the solution computed by the Waves in Homogeneous, Anisotropic Multicomponent Plasmas (WHAMP) code [K. Rönnmark, Kiruna Geophysical Institute Reports 179 (1982)], using dispersion curves and surfaces produced with both programs. The match between the two fundamentally different approaches is excellent in the low-frequency, long wavelength range which is of interest in global magnetospheric simulations. The left-hand and right-hand polarized wave modes as well as the Bernstein modes in the Vlasiator simulations agree well with the WHAMP solutions. Vlasiator allows a direct investigation of the importance of the Hall term by including it in or excluding it from Ohm's law in simulations. This is illustrated showing examples of waves obtained using the ideal Ohm's law and Ohm's law including the Hall term. Our analysis emphasizes the role of the Hall term in Ohm's law in obtaining wave modes departing from ideal magnetohydrodynamics in the hybrid-Vlasov model. |
format |
Text |
author |
Kempf, Yann Pokhotelov, Dimitry von Alfthan, Sebastian Vaivads, Andris Palmroth, Minna Koskinen, Hannu E. J. |
author_facet |
Kempf, Yann Pokhotelov, Dimitry von Alfthan, Sebastian Vaivads, Andris Palmroth, Minna Koskinen, Hannu E. J. |
author_sort |
Kempf, Yann |
title |
Wave dispersion in the hybrid-Vlasov model: verification of Vlasiator |
title_short |
Wave dispersion in the hybrid-Vlasov model: verification of Vlasiator |
title_full |
Wave dispersion in the hybrid-Vlasov model: verification of Vlasiator |
title_fullStr |
Wave dispersion in the hybrid-Vlasov model: verification of Vlasiator |
title_full_unstemmed |
Wave dispersion in the hybrid-Vlasov model: verification of Vlasiator |
title_sort |
wave dispersion in the hybrid-vlasov model: verification of vlasiator |
publisher |
arXiv |
publishDate |
2013 |
url |
https://dx.doi.org/10.48550/arxiv.1311.3793 https://arxiv.org/abs/1311.3793 |
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Kiruna |
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op_relation |
https://dx.doi.org/10.1063/1.4835315 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1311.3793 https://doi.org/10.1063/1.4835315 |
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1766058348332974080 |