HR: 1330h
AN: SM42C-0623    [PDF]
TI: Investigation on the Cause of the Dawnside Local Maximum in Energetic Electron Precipitation Following Substorms
AU: * Aasnes, A
EM: aasnes@lanl.gov
AF: University of Bergen, Fysisk institutt Allegt. 55, Bergen, 5007 Norway
AU: * Aasnes, A
EM: aasnes@lanl.gov
AF: Los Alamos National Lab, Mail Stop D436, Los Alamos, NM 87544 United States
AU: Friedel, R H
EM: friedel@lanl.gov
AF: Los Alamos National Lab, Mail Stop D436, Los Alamos, NM 87544 United States
AU: Stadsnes, J
EM: Johan.Stadsnes@fi.uib.no
AF: University of Bergen, Fysisk institutt Allegt. 55, Bergen, 5007 Norway
AU: Thomsen, M F
EM: mthomsen@lanl.gov
AF: Los Alamos National Lab, Mail Stop D436, Los Alamos, NM 87544 United States
AU: Cayton, T
EM: tcayton@lanl.gov
AF: Los Alamos National Lab, Mail Stop D436, Los Alamos, NM 87544 United States
AB: A local maximum in the energetic electron precipitation on the dawnside following substorm onsets is a common feature in the PIXIE X-ray images. The cause of this maximum is thought to be whistler waves scattering electrons into the loss cone. The MPA instrument on the LANL satellites measures the full 3-dimensional particle distribution, and from the symmetry axis of the distribution the magnetic field direction can be determined. With the magnetic field direction at the satellite we can obtain pitch angle distributions from both the MPA and SOPA instruments to investigate if they are likely to support whistler wave growth. Events will be shown where we have both a dawnside maximum in the PIXIE images and LANL satellites in the corresponding local time.
DE: 2455 Particle precipitation
DE: 2467 Plasma temperature and density
DE: 2483 Wave/particle interactions
DE: 2716 Energetic particles, precipitating
DE: 2788 Storms and substorms
SC: SPA - Magnetospheric Physics [SM]
MN: 2003 Fall Meeting