HR: 08:30h
AN: SM51B-01    [Abstracts]
TI: Growth Phase Current Sheet and Substorm Processes
AU: * Cheng, C Z
EM: fcheng@pppl.gov
AF: Princeton University, Princeton Plasma Physics Laboratory, Princeton, NJ 08543 United States
AU: Wu, B H
AF: NSPO, Science Park, Hsin-Chu City, Taiwan
AU: Gorelenkov, N N
AF: Princeton University, Princeton Plasma Physics Laboratory, Princeton, NJ 08543 United States
AU: Engebretson, M J
AF: Augsburg College, Dept. of Phys., Minneapolis, MN United States
AU: Scudder, J D
AF: University of Iowa, Dept. of Physics, Iowa City, IA United States
AU: Zaharia, S
AF: LANL, Los Alamos National Laboratory, Los Alamos, NM United States
AB: We present POLAR observation of a substorm event from growth phase to substorm expansion. We also make use of the particle pressure computed from HYDRA data along the POLAR orbit to model the 3D structure of the current sheet in the near-Earth region (~ 8-10 R_E) during the growth phase. We will also show the magnetic field fluctuations associated with the substorm activity. In particular, we find that the substorm turbulence activity consists of fluctuations with period of about 60 seconds (in the Pi 2 range) to waves with period of a few seconds, consistent with previous observations by AMPTE/CCE and Geotail. We will also show numerical solutions of kinetic ballooning modes for the modeled 3D equilibrium.
DE: 2740 Magnetospheric configuration and dynamics
DE: 2752 MHD waves and instabilities
DE: 2764 Plasma sheet
DE: 2788 Storms and substorms
SC: SPA-Magnetospheric Physics [SM]
MN: 2005 Joint Assembly