Energetic Electron Injections in Saturn's Inner Magnetosphere: Statistics and Characteristics

Details Energetic Electron Injections in Saturn's Inner Magnetosphere: Statistics and Characteristics Energetic Electron Injections in Saturn's Inner Magnetosphere: Statistics and Characteristics

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm14a..03r&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM14A-03

Physics

[2700] Magnetospheric Physics, [2732] Magnetospheric Physics / Magnetosphere Interactions With Satellites And Rings, [2740] Magnetospheric Physics / Magnetospheric Configuration And Dynamics, [2760] Magnetospheric Physics / Plasma Convection

Scientific paper

This work follows on the work by Anna Mueller (Thesis, 2010) in which she investigated energetic electron injections as detected by the Cassini Magnetospheric Imaging Instrument Low Energy Magnetospheric Measurement Spectrometer (MIMI/LEMMS) in the 25 to 200 keV energy range between 3 and 13 Rs. We extend the investigation of energetic electron injections into the region between L = 3 and 6 Rs. While nominally included in Mueller's study, this region is difficult because of high penetrating electron backgrounds. In the current work, we cover the range between 3 Rs and 6 Rs, obtaining the radial dependence of the electron intensities within the injections, as well as a determination of their nominal ages and their injection locations, both in local time and in SLS(3,4) coordinates. We find an average age for these injections of several hours, a bit longer than that found at lower energies by Chen and Hill (2008), but consistent with that found by Mueller et al. (2010). We find two boundaries where the injection intensity drops, at about 5 and again at about 4 Rs. We believe these features to be caused by interaction with the cold gas associated with Enceladus. Müller, A. L., J. Saur, N. Krupp, E. Roussos, B. H. Mauk, A. M. Rymer, D. G. Mitchell, and S. M. Krimigis (2010), Azimuthal plasma flow in the Kronian magnetosphere, J. Geophys. Res., 115, A08203, doi:10.1029/2009JA015122. Chen, Y., and T. W. Hill (2008), Statistical analysis of injection/dispersion events in Saturn's inner magnetosphere, J. Geophys. Res., 113, A07215, doi:10.1029/2008JA013166.

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