HR: 08:50h
AN: SM21C-04 [Abstracts]
TI: First THEMIS Results Concerning the Nature and the Role of the Electromagnetic Waves During Substorm Process Versus Radial Distance
AU: * Le Contel, O
EM: olivier.lecontel@cetp.ipsl.fr
AF: CETP/CNRS/UVSQ/UPMC, 10-12,avenue de l'Europe, VELIZY, F-78140, France
AU: Roux, A
EM: alain.roux@cetp.ipsl.fr
AF: CETP/CNRS/UVSQ/UPMC, 10-12,avenue de l'Europe, VELIZY, F-78140, France
AU: Robert, P
EM: patrick.robert@cetp.ipsl.fr
AF: CETP/CNRS/UVSQ/UPMC, 10-12,avenue de l'Europe, VELIZY, F-78140, France
AU: Coillot, C
EM: cco@cetp.ipsl.fr
AF: CETP/CNRS/UVSQ/UPMC, 10-12,avenue de l'Europe, VELIZY, F-78140, France
AU: Bouabdellah, A
EM: abe@cetp.ipsl.fr
AF: CETP/CNRS/UVSQ/UPMC, 10-12,avenue de l'Europe, VELIZY, F-78140, France
AU: Alison, D
EM: dal@cetp.ipsl.fr
AF: CETP/CNRS/UVSQ/UPMC, 10-12,avenue de l'Europe, VELIZY, F-78140, France
AU: Rucco, S
EM: sebastien.ruocco@cetp.ipsl.fr
AF: CETP/CNRS/UVSQ/UPMC, 10-12,avenue de l'Europe, VELIZY, F-78140, France
AU: Chaston, C C
EM: ccc@ssl.berkeley.edu
AF: SSL, University of California, Berkeley, CA 94720, United States
AU: Angelopoulos, V
EM: vassilis@ssl.berkeley.edu
AU: Bonnell, J W
EM: jbonnell@ssl.berkeley.edu
AF: SSL, University of California, Berkeley, CA 94720, United States
AU: Larson, D
EM: davin@ssl.berkeley.edu
AF: SSL, University of California, Berkeley, CA 94720, United States
AU: Mc Fadden, J
EM: mcfadden@ssl.berkeley.edu
AF: SSL, University of California, Berkeley, CA 94720, United States
AU: Carlson, C W
EM: cwc@ssl.berkeley.edu
AF: SSL, University of California, Berkeley, CA 94720, United States
AU: Mende, S B
EM: mende@ssl.berkeley.edu
AF: SSL, University of California, Berkeley, CA 94720, United States
AU: Frey, H
EM: hfrey@ssl.berkeley.edu
AF: SSL, University of California, Berkeley, CA 94720, United States
AU: Ergun, R
EM: Ree@Fast. Colorado. Edu
AU: Cully, C M
EM: cully@colorado.edu
AF: LASP, University of Colorado, Boulder, CO 80303-7814, United States
AU: Glassmeier, K
EM: kh.glassmeier@t-online.de
AF: TUBS, Mendelssohnstr. 3, 4. OG., Zi. 401, Braunschweig, 38106, Germany
AU: Auster, U
EM: uli.auster@tu-bs.de
AF: TUBS, Mendelssohnstr. 3, 4. OG., Zi. 401, Braunschweig, 38106, Germany
AU: Russell, C T
EM: ctrussel@igpp.ucla.edu
AF: IGPP, University of California, Los Angeles, CA 90024, United States
AU: Donovan, E
EM: donovan@phys.ucalgary.ca
AF: Dept. of Physics and Astronomy, University of Calgary, Calgary, T2N 1N4, Canada
AU: Mann, I R
AF: Dept. of Physics, University of Alberta, Edmonton, T6G 2G7, Canada
AB:
Current driven instabilities are thought to be the cause of electromagnetic waves with frequency around the proton
gyrofrequency in the near-earth plasma sheet. It was suggested that they could be the substorm trigger. Lower
hydrid drift instability in the near and mid magnetotail was invoked to provide the anomalous resistivity needed in
order that resistive instabilities allow magnetic reconnection to develop in an otherwise collisionless regime. At
smaller scale and higher frequencies, whistler mode waves are also expected to act as a dissipation
mechanism in the electron diffusion region and/or are considered as signature of fast magnetic reconnection
processes. Thus the nature and the role played by electromagnetic waves in the substorm process is still a
matter of debate. Taking benefits of the radial distribution of the five THEMIS probes and of the comprehensive set
of THEMIS instruments we present the first THEMIS analysis of electromagnetic wave activity during substorms
as a function of the radial distance.
DE: 2744 Magnetotail
DE: 2772 Plasma waves and instabilities (2471)
DE: 2790 Substorms
DE: 7829 Kinetic waves and instabilities
DE: 7867 Wave/particle interactions (2483, 6984)
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting