Energetic Heavy Ion Depletion Observations Near Europa

Details Energetic Heavy Ion Depletion Observations Near Europa Energetic Heavy Ion Depletion Observations Near Europa

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm23b1607k&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM23B-1607

Physics

[2720] Magnetospheric Physics / Energetic Particles: Trapped, [2732] Magnetospheric Physics / Magnetosphere Interactions With Satellites And Rings, [2756] Magnetospheric Physics / Planetary Magnetospheres

Scientific paper

Energetic heavy ions in Jupiter’s magnetosphere are believed to be accelerated primarily through inward radial diffusion from ~25 Rj to inside Io. As the ions transit the orbital path of Europa at 10 Rj, they have an opportunity to be lost through a variety of processes including absorption, scattering and charge exchange. The Galileo Heavy Ion Counter (HIC) monitored the heavy ion (6C to 28Ni), high energy (~6 to >200 MeV nucl-1) environment at Jupiter between 1995 to 2003. Observations (both real time and record mode) from more than 30 Galileo orbits during that period that crossed Europa’s orbit indicate a distributed depletion region. Several quantitative examples showing oxygen depletions in the 5-50 MeV/nuc energy range are presented. These new data provide a unique, useful reference for testing diffusion models in this crucial region at Jupiter.

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