HR: 10:20h
AN: SM12A-01 INVITED     [Abstracts]
TI: Heavy Ions in the Magnetosphere: Results from CLUSTER/CIS
AU: * Kistler, L M
EM: Lynn.Kistler@unh.edu
AF: Space Science Center and Dept of Physics, University of New Hampshire, Durham, NH 03824 United States
AU: Dandouras, I
AF: CESR, 9 Avenue Colonel-Roche, Toulouse, 31029 France
AU: Mouikis, C G
AF: Space Science Center and Dept of Physics, University of New Hampshire, Durham, NH 03824 United States
AU: Vallat, C
AF: CESR, 9 Avenue Colonel-Roche, Toulouse, 31029 France
AB: The CLUSTER spacecraft have now been operating for 3.5 years. The large geometric factor and fast energy sweeping of the CIS ion composition instrument on CLUSTER, combined with the multispacecraft capabilities, have allowed unprecedented measurements of heavy ions in the magnetosphere. In this talk we will review recent results on heavy ions in the magnetosphere from the CLUSTER/CIS instrument. We have found that there are time periods throughout the magnetosphere where heavy ions are a dominant species, effecting the dynamics. In addition, the heavy ions are always important as a tracer to determine the sources and transport paths of the ions. We will discuss the impact of heavy ions on substorm dynamics and reconnection in the magnetotail. Measurements in the plasmasphere have shown that the density profiles are different for the main plasma species, and that at CLUSTER altitudes, H+ and He+ are mainly trapped, while O+ is upwelling. Finally, comparisons between the in situ measurements of heavy ions from CLUSTER and remote sensing from IMAGE neutral imagers and EUV measurements have helped to understand the dynamics of the plasmasphere and ring current.
DE: 2731 Magnetosphere--outer
DE: 2736 Magnetosphere/ionosphere interactions
DE: 2764 Plasma sheet
DE: 2768 Plasmasphere
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting