HR: 1340h
AN: SM33B-0451 [Abstracts]
TI: Cluster/RAPID high energy particle observations within non-force-free flux ropes in the plasma
sheet
AU: * Mulligan, T
EM: Tamitha.Mulligan@aero.org
AF: The Aerospace Corporation, P.O. Box 92957, M2-260, Los Angeles, CA 900009
United States
AU: Fennell, J F
EM: Joseph.F.Fennell@aero.org
AF: The Aerospace Corporation, P.O. Box 92957, M2-260, Los Angeles, CA 900009
United States
AU: Roeder, J L
EM: James.L.Roeder@aero.org
AF: The Aerospace Corporation, P.O. Box 92957, M2-260, Los Angeles, CA 900009
United States
AU: Friedel, R
EM: friedel@nis.lanl.gov
AF: Los Alamos National Laboratory, Mail Stop D-436, Los Alamos, NM 87545
United States
AU: Fritz, T A
EM: fritz@bu.edu
AF: Boston University, 725 Commonwealth, Boston, MA 02215
United States
AU: Daly, P W
EM: daly@linmpi.mpg.de
AF: Max-Planck-Institut fuer Aeronomie, Max-Planck-Str. 2
, Katlenburg-Lindau, D-37191
Germany
AB:
Separation distances of 0.1 Re or greater between the Cluster spacecraft provide a unique opportunity to probe the
3-dimensional geometry of flux ropes in the magnetotail. Applying a non-force-free, multispacecraft flux rope model to
simultaneously invert magnetic field data from the Cluster fleet, we obtain the magnetic geometry and current densities of
observed flux ropes in the near-Earth tail. We compare the model current densities to those from the curlometer calculations
and find the model reproduces the overall magnitude and structure of non-force-free flux ropes in the tail. Probing
Cluster/RAPID energetic electron and ion composition in the rope vicinity, including times when burst mode and pitch angle
distributions are available, reveals a relationship between the 3-D geometry of the flux rope and injection signatures of
high energy particles in the surrounding plasma environment. We interpret this relationship in terms of the reconnection
region and discuss flux rope current closure in the ionosphere and solar wind.
DE: 2716 Energetic particles: precipitating
DE: 2744 Magnetotail
DE: 2756 Planetary magnetospheres (5443, 5737, 6033)
DE: 2764 Plasma sheet
DE: 2788 Magnetic storms and substorms (7954)
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005