The Geomagnetic Cusps as seen in High Charge State Shocked Solar Wind Ions Observed with s/c Polar during April 2001

Details The Geomagnetic Cusps as seen in High Charge State Shocked Solar Wind Ions Observed with s/c Polar during April 2001 The Geomagnetic Cusps as seen in High Charge State Shocked Solar Wind Ions Observed with s/c Polar during April 2001

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm41b0798s&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SM41B-0798

Physics

2720 Energetic Particles, Trapped, 2724 Magnetopause, Cusp, And Boundary Layers, 2740 Magnetospheric Configuration And Dynamics, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

We present a method of polar cusp identification using high charge state heavy ions. There is reason to think that these ions constitute shocked solar wind protons and heavier ions such as He2+ and O(3-8)+ that have easy access to one of both of the polar cusps essentially at all times. The observations made with the ISTP/POLAR CAMMICE MICS sensor were mostly obtained during geomagnetically non-storm time in April 2001 when the POLAR orbit allowed northern cusp encounters with a low angle between the spacecraft velocity vector and the overall cusp magnetic field orientation. We will also present an extended cusp crossing during the modest magnetic storm on April 22, 2001 [Dst~-103 nT]. It is found that during the study period, 1-10 keV high charge state ions are present in the cusp region at virtually all times, during storm or quiet. A region that appears to be the interior of the cusp can be rather turbulent both in the magnetic field direction and in the energetic charged particle flow characteristics. There is also evidence for temporally varying turbulent acceleration processes, either within the cusp domain or in the surrounding magnetosphere.

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