Investigations of Interchange stability using the RCM-E.

Details Investigations of Interchange stability using the RCM-E. Investigations of Interchange stability using the RCM-E.

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm11a0290t&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SM11A-0290

Physics

2730 Magnetosphere: Inner, 2740 Magnetospheric Configuration And Dynamics, 2753 Numerical Modeling, 2764 Plasma Sheet, 2788 Magnetic Storms And Substorms (7954)

Scientific paper

We present results of using the Rice Convection Model - Equilibrium (RCM-E) to explore whether this region near the inner edge of the plasma sheet is interchange unstable. The RCM-E is coupled model of the inner and middle plasma sheet that is the result of a combination of the RCM and a three-dimensional equilibrium solver. The equilibrium solver attempts to keep the magnetic field in approximate 3D static force balance with pressures computed by the RCM. A one dimensional analysis of interchange instability for the case of a high- beta plasma, derived by Bernstein et al. [Proc. Royal Soc. Of London, A244, 1958], suggests that the interchange instability criterion may be satisfied if the plasma pressure gradient and the gradient of flux tube volume are nearly parallel and the pressure gradient is sufficiently large. One location where this may occur is in the inner edge of the plasmasheet. We will use the RCM-E for various idealized conditions, such as a substorm growth phase, to see under what conditions, if any, the interchange instability criteria can be satisfied.

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