HR: 15:26h
AN: SH43B-07    [Abstracts]
TI: Are Inner Source Pickup Ions further Accelerated in Interplanetary Space?
AU: * M\"obius, E
EM: eberhard.moebius@unh.edu
AF: Dept. of Physics and Inst. for the Study of Earth, Oceans and Space, University of New Hampshire, Morse Hall, Durham, NH 03824 United States
AU: Kucharek, H
EM: harald.kucharek@unh.edu
AF: Dept. of Physics and Inst. for the Study of Earth, Oceans and Space, University of New Hampshire, Morse Hall, Durham, NH 03824 United States
AU: Popecki, M
EM: mark.popecki@unh.edu
AF: Dept. of Physics and Inst. for the Study of Earth, Oceans and Space, University of New Hampshire, Morse Hall, Durham, NH 03824 United States
AU: Bochsler, P
EM: bochsler@phim.unibe.ch
AF: Physikalisches Institut, Universit\"at Bern, Sidlerstr. 5, Bern, 3012 Switzerland
AU: Kallenbach, R
EM: reinald.kallenbach@issi.unibe.ch
AF: International Space Science Institute, Hallerstr. 6, Bern, 3012 Switzerland
AU: Klecker, B
EM: berndt.klecker@mpe.mpg.de
AF: Max-Planck-Institut f\"ur extraterrestrische Physik, Giessenbachstr., Garching, 85748 Germany
AU: Wimmer-Schweingruber, R
EM: wimmer@physik.uni-kiel.de
AF: IEAP, Universit\"at Kiel, Leibnizstr. 11, Kiel, 24098 Germany
AB: Inner source pickup ions originate most likely from the interaction of the solar wind with dust particles in interplanetary space. They are thought to be generated either through saturation of dust with solar wind, subsequent desorption, and pickup, or through penetration of small dust grains by solar wind, neutralization, and subsequent re-ionization. In both cases a velocity distribution emerges, which is genuinely suprathermal, but peaks below the solar wind speed. Based on the realization that interstellar pickup ions are preferentially injected for further acceleration it has been suggested that also inner source ions may contribute visibly to the energetic particle populations in interplanetary space. It has been shown that inner source ions do not contribute significantly to the CIR population that is accelerated mostly outside 1 AU and observed in Earth's orbit. Since inner source ions are generated close to the sun one might expect that they could contribute to energetic particles accelerated at traveling shocks. We will present results from the search of such ions in traveling shocks that have been identified to accelerate substantial amounts of He+. The results will be discussed in the light of models for inner source pickup ion distributions and for injection of ions into acceleration.
DE: 2109 Discontinuities
DE: 2114 Energetic particles, heliospheric (7514)
DE: 2129 Interplanetary dust
DE: 2152 Pickup ions
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2004 AGU Fall Meeting