Energetic particle injections in Saturn's magnetosphere

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Read Full Article (file size: 263704 bytes) Cited by GEOPHYSICAL RESEARCH LETTERS, VOL. 32, L14S05, doi:10.1029/2005GL022485, 2005 Energetic particle injections in Saturn's magnetosphere B. H. Mauk Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USA J. Saur Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USA D. G. Mitchell Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USA E. C. Roelof Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USA P. C. Brandt Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USA T. P. Armstrong Fundamental Technologies, Lawrence, Kansas, USA D. C. Hamilton Department of Physics, University of Maryland, College Park, Maryland, USA S. M. Krimigis Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USA N. Krupp Max-Planck Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany S. A. Livi Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USA J. W. Manweiler Fundamental Technologies, Lawrence, Kansas, USA C. P. Paranicas Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USA Abstract Measurements from the Cassini Magnetospheric Imaging Instrument (MIMI) beginning in July 2004 reveal that sudden planetward injections of energetic ions (5–200 keV) and electrons (20–200 keV) over confined regions of azimuth are pervasive events in Saturn's magnetosphere over the radial range of 3.8 to 11.2 Saturn radii (R_S). Saturn is thus similar to both Earth and Jupiter in the pervasiveness of such injections. At Saturn with Cassini, unlike Jupiter with Galileo, effects of the large radial gradients in the global azimuthal rotational flow pattern often dominates the dispersive particle injection signatures. Accurate knowledge of rotational flow patterns is required to calculate the age and formation positions of injections that are more than several hours old. Here we develop procedures to derive the needed flow profiles from the injections themselves. Received 19 January 2005; accepted 4 March 2005; published 11 June 2005. Index Terms: 2720 Magnetospheric Physics: Energetic particles: trapped; 2740 Magnetospheric Physics: Magnetospheric configuration and dynamics; 2756 Magnetospheric Physics: Planetary magnetospheres (5443, 5737, 6033); 2788 Magnetospheric Physics: Magnetic storms and substorms (7954); 5737 Planetary Sciences: Fluid Planets: Magnetospheres (2756). Read Full Article (file size: 263704 bytes) Cited by Citation: Mauk, B. H., et al. (2005), Energetic particle injections in Saturn's magnetosphere, Geophys. Res. Lett., 32, L14S05, doi:10.1029/2005GL022485. Copyright 2005 by the American Geophysical Union.

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