Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm41a1107o&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SM41A-1107
Physics
7839 Nonlinear Phenomena, 2720 Energetic Particles, Trapped, 2731 Magnetosphere: Outer
Scientific paper
Certain drift shells that pass sufficiently close to the dayside magnetosphere encounter a local maximum around the equatorial plane, and near local noon. As a result of that local maximum, the shell undergoes a bifurcation, with one branch in each hemisphere. Past the neighborhood of local noon, the branches meet again. The line where bifurcation occurs is a singular line, where the bounce period goes to infinity. As a result, the adiabaticity of the bounce motion breaks down and the post-bifurcation second invariant can be significantly different from the initial value. The first invariant is not broken. We provide simulations, and an analysis in terms of the "separatrix crossing" theory. The change in the second invariant is stronger with small mirror field, with small initial second invariant and with large kinetic energy. Also, bifurcation has the effect of creating "metastable shells", by keeping quasi-trapped particles inside the magnetosphere for a finite number of drifts.
Chan Anthony A.
Ozturk M.
Wolf Richard A.
No associations
LandOfFree
Drift-Shell Bifurcation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Drift-Shell Bifurcation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drift-Shell Bifurcation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1468902