HR: 16:45h
AN: SM32D-04    [PDF]
TI: Energetic Ion Observations at the Cusp and Bow Shock
AU: * Chang, S
EM: changs@cspar.uah.edu
AF: Center of Space Plasma and Aeronomic Research, University of Alabama in Huntsville, SD50, 320 Sparkman Dr., Huntsville, AL 35805 United States
AU: Kudela, K
AF: Institute of Experimental PHysics, Slovak Academy Sciences, Kosice, 04353 Slovakia (Slovak Republic)
AU: Fennell, J F
EM: foseph.f.fennell@aero.org
AF: The Aerospace Corporation, Mail Stop M2-259, Los Angeles, CA 90009 United States
AU: Spence, H E
EM: spence@bu.edu
AF: Boston University, Department of Astronomy and Space Physics, 725 Commonwealth Ave, Boston, MA 02215 United States
AB: Previous studies have shown that solar wind ions are accelerated up to $\sim$150 keV/e at the quasi-parallel bow shock via the first order Fermi mechanism. It has been suggested that shock accelerated ions can directly enter the cusp when cusp and quasi-parallel shock are magnetically connected through the merging of IMF and geomagnetic field lines. Results from global hybrid simulations for a northward and antisunward IMF are consistent with the ion acceleration and transport processes. We present simultaneous observations of energetic ions from Interball and Polar in the foreshock and cusp region, respectively. Ion fluxes at the quasi-parallel bow shock agree with those in the cusp. Furthermore, energetic ions at both places demonstrate similar spectral characteristics. These results are consistent with the shock acceleration and ion transport processes.
DE: 2154 Planetary bow shocks
DE: 2716 Energetic particles, precipitating
DE: 2724 Magnetopause, cusp, and boundary layers
DE: 2784 Solar wind/magnetosphere interactions
SC: SPA - Magnetospheric Physics [SM]
MN: 2003 Fall Meeting