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dc.contributor.authorTaktakishvili, Alexander L.
dc.contributor.authorZimbardo, G.
dc.contributor.authorAmata, Ermanno
dc.contributor.authorSavin, Sergey P.
dc.contributor.authorGreco, Antonella
dc.contributor.authorVeltri, Pierluigi
dc.contributor.authorLopez, Ramon E.
dc.date.accessioned2017-10-16T16:45:56Z
dc.date.available2017-10-16T16:45:56Z
dc.date.issued2007-08-29
dc.identifier.citationTaktakishvili, A., Zimbardo, G., Amata, E., Savin, S., Greco, A., Veltri, P., & Lopez, R. E. (2007). Ion escape from the high latitude magnetopause: Analysis of oxygen and proton dynamics in the presence of magnetic turbulence. Annales Geophysicae, 25(8), 1877-1885.en_US
dc.identifier.urihttp://hdl.handle.net/11141/1965
dc.descriptionMagnetospheric physics (Magnetopause, cusp, and boundary layers) – Space plasma physics (Numerical simulation studies; Transport processes)en_US
dc.description.abstractRecent Cluster observations of the vicinity of the high latitude magnetopause indicate the presence of beams of singly charged oxygen ions, which are of ionospheric origin. In this paper we examine the role of magnetic turbulence combined with a dc electric field across the magnetopause in causing the cross field transport of protons and of singly charged oxygen ions, by means of a kinetic test particle simulation. We find that the observed values of magnetosheath turbulence and electric fields can produce a substantial escape of the oxygen ions relative to protons. By varying the magnetic turbulence level in the simulation, we find that the number of O+ crossing the magnetopause grows with δB/B0, and that very few ions can cross the magnetopause for δB/B0=0. The ion temperature also grows with δB/B0, showing that magnetic turbulence is effective in thermalizing the kinetic energy gain due to the cross-magnetopause potential drop. We suggest that this mechanism can help to explain Cluster observations of energetic oxygen ions during a high-latitude magnetopause crossing.en_US
dc.language.isoen_USen_US
dc.rights© Author(s) 2007. This work is distributed under the Creative Commons Attribution 3.0 License.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/en_US
dc.titleIon escape from the high latitude magnetopause: Analysis of oxygen and proton dynamics in the presence of magnetic turbulenceen_US
dc.typeArticleen_US
dc.identifier.doi10.5194/angeo-25-1877-2007


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© Author(s) 2007. This work is distributed under
the Creative Commons Attribution 3.0 License.
Except where otherwise noted, this item's license is described as © Author(s) 2007. This work is distributed under the Creative Commons Attribution 3.0 License.