HR: 0800h
AN: P41B-09    [Abstracts]
TI: 3D Hybrid Simulation of the Titan's Plasma Environment
AU: * Lipatov, A S
EM: alipatov@umbc.edu
AF: GEST Center, UMBC, NASA GSFC, Code 673, Bldg 21 8800 Greenbelt Road, Greenbelt, MD 20771, United States
AU: Sittler, E C
EM: Edward.C.Sittler@nasa.gov
AF: NASA-Goddard Space Flight Center, NASA GSFC, Code 673, Bldg 21 8800 Greenbelt Road, Greenbelt, MD 20771, United States
AU: Hartle, R E
EM: Richard.E.Hartle@nasa.gov
AF: NASA-Goddard Space Flight Center, NASA GSFC, Code 673, Bldg 21 8800 Greenbelt Road, Greenbelt, MD 20771, United States
AB: Titan plays an important role as a simulation laboratory for multiscale kinetic plasma processes which are key processes in space and laboratory plasmas. A development of multiscale combined numerical methods allows us to use more realistic plasma models at Titan. In this report, we describe a Particle-Ion--Fluid-Ion--Fluid- Electron method of kinetic ion-neutral simulation code (see, e.g. [Lipatov, 2002]). This method takes into account charge-exchange and photoionization processes. The model of atmosphere of Titan was based on a paper by Sittler, Hartle, Vinas et al., [2005]. The background ions H⁺, O⁺ and pickup ions H₂⁺, CH₄⁺ and N₂⁺ are described in a kinetic approximation, where the electrons are approximated as a fluid. In this report we study the coupling between background ions and pickup ions on the multiple space scales determined by the ion gyroradiis. The first results of such a simulation of the dynamics of ions near Titan are discussed in this report and compared with recent measurements made by the Cassini Plasma Spectrometer (CAPS, [Hartle, Sittler et al., 2006]). E C Sittler Jr., R E Hartle, A F Vinas, R E Johnson, H T Smith and I Mueller-Wodarg, J. Geophys. Res., 110, A09302, 2005. R. E. Hartle, E. C. Sittler, F. M. Neubauer, R. E. Johnson, et al., Planet. Space Sci., 54, 1211, 2006. A S Lipatov, The Hybrid Multiscale Simulation Technology. An Introduction with Application to Astrophysical and Laboratory Plasmas, Springer-Verlag, Berlin, Heidelberg, New York, 2002, p.p. 1-403.
DE: 2152 Pickup ions
DE: 5719 Interactions with particles and fields
DE: 5780 Tori and exospheres
DE: 6025 Interactions with solar wind plasma and fields
DE: 6281 Titan
SC: Planetary Sciences [P]
MN: 2007 Joint Assembly