Observations of Energetic O+ in the Distant Tail Magnetosheath: Results from STEREO/PLASTIC

Details Observations of Energetic O+ in the Distant Tail Magnetosheath: Results from STEREO/PLASTIC Observations of Energetic O+ in the Distant Tail Magnetosheath: Results from STEREO/PLASTIC

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmsh34a..03k&link_type=abstract

American Geophysical Union, Spring Meeting 2007, abstract #SH34A-03

Physics

2724 Magnetopause And Boundary Layers, 2728 Magnetosheath, 2748 Magnetotail Boundary Layers, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

Two identical Plasma and Suprathermal Ion Composition (PLASTIC) instruments are now flying on the STEREO A and B observatories, which launched in October 2006. PLASTIC is a solar wind and heliospheric ion mass spectrometer that utilizes electrostatic deflection, post-acceleration,time-of-flight, energy, and position measurements in the energy-per-charge range of 0.25-80 keV/e. During the month of February, 2007, as the spacecraft were approaching their final heliocentric orbits, STEREO B traversed the dusk-side magnetosheath and boundary layer from -100 Re to -300 Re down the tail. Throughout the month, bursts of energetic O+ were observed in the magnetosheath. The energy of the O+ extended to the upper range of the instrument, 80 keV. The occurrence of O+ correlated with periods of high solar wind velocity. We will compare these observations with observations of O+ in the near-earth magnetosheath, as observed by CLUSTER, and discuss the possible sources and transport paths for these ions.

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