Particle entry into the inner magnetosphere during duskward IMF By: Global three-dimensional electromagnetic full particle simulations

Details Particle entry into the inner magnetosphere during duskward IMF By: Global three-dimensional electromagnetic full particle simulations Particle entry into the inner magnetosphere during duskward IMF By: Global three-dimensional electromagnetic full particle simulations

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3312101c&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 12, CiteID L12101

Physics

3

Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Substorms, Magnetospheric Physics: Magnetospheric Configuration And Dynamics, Magnetospheric Physics: Magnetopause And Boundary Layers, Magnetospheric Physics: Numerical Modeling

Scientific paper

The change of the interplanetary magnetic field (IMF) direction from northward to duskward has an important impact on the inner magnetosphere. This impact is analyzed with the help of a new parallel version of the global three-dimensional full particle simulation code. For northward IMF, bands of weak magnetic field (sash) form poleward of the cusp at high latitudes in each hemisphere. These sashes move to the equator (within opposite quadrants) as the IMF rotates duskward and merge into one another to form the characteristic ``Crosstail-S'' within the neutral sheet of the magnetotail. These macroscopic magnetic patterns (sashes and Crosstail-S) evidenced herein are in a good agreement with results of previous 3D MHD simulations and experimental observations. Moreover, the analysis of particle fluxes shows that ``sashes'' and ``Crosstail-S'' act as magnetic groove to facilitate the entry and injection of magnetosheath particles into the inner magnetosphere. Injected particles are accelerated after the IMF changes its direction from northward to duskward.

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