1. Kinetic Entry of Energetic Ions into the Magnetosphere A brief overview of a planned SolarCism contribution Dietmar Krauss-Varban Yan Li Janet Luhmann …expect initial results @ Merida/Mexico conference

2. Approach Study SEP event ion entry with ion-kinetic (hybrid) simulations. Why “kinetic” entry? Why not 3-D global hybrid simulations for everything, including formation/decay of ring current & low L-shell radiation belts?

3. Why “kinetic” entry? large amplitude turbulence both upstream and downstream shock and magnetopause are discontinuities Omidi and Krauss-Varban, 1996

4. Why “kinetic” entry? bow shock accelerates ions to 0.3MeV (sometimes to several MeV) in resonant waves large CME-associated perturbations  compression on short, ion time scales

5. Hybrid Simulations time scales well suited to hybrid simulations can easily address various masses and charge states very good statistics on separately described species (kinetic ions, electron fluid)

6. Anticipated work/goals: Study SEP entry with 2-D global hybrid code and large-scale 3-D hybrid code Analyze the spectra, filtering, and further energization of the ions Select appropriate intervals and good events for observational study (Yan Li; ACE, SAMPEX, GOES) Compare spectra, fluxes and composition between upstream and magnetospheric SEP observations throughout solar cycle and for various IMF and solar wind conditions

7. Summary 3-D global hybrid simulations are still too expensive to run for very long times and on a routine basis/ for parameter study Meanwhile, 2-D global and large-scale 3-D simulations can answer many of the questions concerning the kinetic capture, further energization, and filtering of SEPs during entry, as well as deep entry during magnetospheric compression