Physics
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf...77s&link_type=abstract
EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.77
Physics
Scientific paper
A problem of magnetosphere formation on the ion inertia scale Li=c/ωpi around weakly magnetized bodies is investigated by means of laboratory experiment, analytical analysis and 2D Hall MHD simulation. Experimental evidence of specific Hall magnetic field is presented. Direct comparison of regimes with small and large Li revealed striking differences in measured magnetopause position and in plasma dynamics. Developed analytical model shows how two-fluid physics changes the scaling of cavity size from MHD pressure balance distance to a particle Stoermer radius when Li is large. It also predicts that because of plasma penetration across magnetopause there is a threshold value of Li at which upstream bow shock disappears. Numerical simulation is found to be in a good agreement with experiment and analytical model.
Antonov Vladimir M.
Boyarinsev E. L.
Melekhov Alexandr V.
Ponomarenko Arnold G.
Posukh Vitaliy G.
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