The effect of Ion Cyclotron Waves on energetic electrons in the radiation belts of Saturn
RadiationBelt
Emma
Woodfield
Date Submitted
2019-03-15 10:17:19
British Antarctic Survey
E. E. Woodfield (British Antarctic Survey), S. A. Glauert (British Antarctic Survey), R. B. Horne (British Antarctic Survey)
Electromagnetic Ion Cyclotron Waves (EMIC) at the Earth are thought to scatter very high energy electrons out of the Earth’s radiation belts. In contrast to the Earth where EMIC generation is not continuous, EMIC waves at Saturn are always present at all local times from the orbit of the moon Enceladus out to near the orbit of Dione. Freshly ionized neutral particles from the Enceladus plume are accelerated by the corotating magnetospheric plasma and this gives rise to a ring distribution in velocity space which is the source of the ion cyclotron waves. This band of strong water group EMIC waves gives us a unique opportunity to study the role of EMIC waves in the scattering process both at Saturn and in comparison to the Earth. We use cold plasma dispersion calculations from the PADIE code combined with quasi-linear theory in the BAS Radiation Belt Model to show the effect this band of EMIC waves has on the energetic electron population of the radiation belt at Saturn.
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