HR: 0800h
AN: SM31C-0574    [Abstracts]
TI: Drift Shell Bifurcation Near the Dayside Magnetopause: IMF By Effects
AU: * Wan, Y
EM: yifei@rice.edu
AF: Rice University, Department of Physics and Astronomy, 6100 Main Street, Houston, TX 77005, United States
AU: Wolf, R
EM: rawolf@rice.edu
AF: Rice University, Department of Physics and Astronomy, 6100 Main Street, Houston, TX 77005, United States
AU: Sazykin, S
EM: sazykin@rice.edu
AF: Rice University, Department of Physics and Astronomy, 6100 Main Street, Houston, TX 77005, United States
AB: It is well known that the magnetic field strength along field lines near the dayside magnetopause becomes W- shaped, due to compression of the magnetic field by the solar wind pressure. It is also known that energetic particles drifting across this region may experience chaotic violation of the second adiabatic invariant. Here, we explore an additional mechanism for violation of the invariant due to the east-west asymmetry in the magnetic field caused by non-zero values of the IMF By component. Using several empirical magnetospheric magnetic fields, we present initial results that quantify this previously un-explored effect.
DE: 2700 MAGNETOSPHERIC PHYSICS (6939)
DE: 2720 Energetic particles: trapped
DE: 2724 Magnetopause and boundary layers
DE: 2731 Magnetosphere: outer
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting