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This study examines the energy distribution of O+ and H+ ions in the cusp and polar cap regions, showing beam-like behavior and high perpendicular heating. The data also suggests a correlation between energy steps in ion populations and enhancements in electron density, possibly due to FAC and wave activity in the magnetic field.
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Energy step structures of O+ and H+ ions in the cusp and polar cap,May 18 2001, O+ distribution functions, S/C 1 • At 02:25:20 O+ distribution function shows beam-like behavior, at 02:35:40 distribution function shows high perpendicular heating.
18 May 2001, PP data from different instruments Data correlation: energy steps in O+ and H+ populations – enhancement of electron density – in magnetic field probably FAC - wave activity