Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm51b0375w&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SM51B-0375
Physics
2708 Current Systems (2409), 2753 Numerical Modeling, 2772 Plasma Waves And Instabilities, 2784 Solar Wind/Magnetosphere Interactions
Scientific paper
The mini-magnetosphere plasma propulsion scheme (plasma sail) involves the inflation of a magnetized plasma bubble attached to a satellite in space that is large enough to deflect the solar wind and consequently achieve velocities on the order of 50 km/s [Winglee et al., JGR, 2000]. Here we present simulations of the initial expansion of the magnetic bubble in a simplified geometry. We consider plasma injected into a stationary magnetized background plasma in the presence of a dipole magnetic field with a 2-D kinetic ion, massless fluid electron (hybrid) electromagnetic code. For small values of the dipole field, the injected ions exclude the ambient magnetic field and plasma to form a diamagnetic cavity. For large magnetic dipoles, the injected ions remain magnetized and produce additional plasma currents that expand the dipole field, leading to a magnetic bubble. A criterion to distinguish between these two regimes is derived. Issues associated with the sensitivity of symmetry of the bubble that is formed to the plasma injection scheme are also discussed.
Omidi Nojan
Winske Dan
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