HR: 0800h
AN: SM11A-1169 [Abstracts]
TI: Three Dimensional Energetic Electron Distributions Observed During Substorms: Using a New Mode the L3DD
Data of the Cluster RAPID Experiment
AU: * Wu, P
EM: pwu@bu.edu
AF: Center for Space Physics
Boston University, 725 Commonwealth Ave, Boston, MA 02215
United States
AU: Fritz, T A
EM: fritz@bu.edu
AF: Center for Space Physics
Boston University, 725 Commonwealth Ave, Boston, MA 02215
United States
AU: Zong, Q
EM: zong@bu.edu
AF: Center for Space Physics
Boston University, 725 Commonwealth Ave, Boston, MA 02215
United States
AU: Daly, P W
EM: daly@linmpi.mpg.de
AF: Max-Planck-Institute fuer Aeronomie, D-37191, Katlenburg-Lindau, NS 37191
Germany
AB:
As of May 13, 2004, new software patches had been uploaded to the four RAPID (Research with Adaptive Particle Imaging
Detectors) instruments having an electron energy range of 20-400 kev to produce the L3DD data. The L3DD product allows the
data from energy channel 1 and channel 3 (counting 1-8) to be fully resolved three dimensionally for all four CLUSTER
satellites. Here we report our examination of the 3-D pitch angle distributions (PAD) of energetic electrons as the CLUSTER
satellites cross the earth neutral sheet near their apogee in the nightside magnetosphere during the tail season (July,
August, September, October of year 2004) . We identify several energetic electron ejections associated with substorm events
and analyze their PAD evolution in the two available energy channels for all four satellites. The PAD evolution and its
energy dependent or independent dispersion provide us with an understanding of the particle motion and insights into
acceleration processes in the neutral sheet where the topology of the magnetic field is changing dynamically. Energy spectra
at different pitch angle are studied in detail as well. Finally we will compare those events with the previous Nov.13, 2003
event observed by the CLUSTER SC2 satellite and produce a timeline for each event.
DE: 2700 MAGNETOSPHERIC PHYSICS
DE: 2708 Current systems (2409)
DE: 2720 Energetic particles, trapped
DE: 2731 Magnetosphere--outer
DE: 2740 Magnetospheric configuration and dynamics
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting