Ion Acceleration in Alfven Waves Above the Aurora From FAST

Details Ion Acceleration in Alfven Waves Above the Aurora From FAST Ion Acceleration in Alfven Waves Above the Aurora From FAST

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm72c..05c&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SM72C-05

Physics

2451 Particle Acceleration, 2455 Particle Precipitation, 2471 Plasma Waves And Instabilities, 2704 Auroral Phenomena (2407), 2752 Mhd Waves And Instabilities

Scientific paper

In this presentation we examine the ion heating process that occurs in Alfven waves above the auroral oval from FAST. Observations show that outflowing fluxes of energized ionospheric ions as large as 1010 cm-2 s-1 are observed in conjunction with intervals of Alfvenic fluctuations in fields quantities at frequencies in the spacecraft frame up to the ion gyro-frequency. These ions may represent a significant portion of the density of ionospheric ions in the plasma sheet. Through the use of simulations and observations we show that this heating/acceleration process may be closely related to the process of electron acceleration in the observed Alfven waves and the subsequent feedback response of the ionosphere.

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