First Author: Fennell, J. F.,

Co-Authors: J. L. Roeder, M. W. Chen, W. K. Peterson, K. J. Trattner,  T. I. Pulkkinen,  T. A. Fritz, R. Sheldon,  M. Grande, C. Perry,  and S. Livi,

Title: Multiple Discrete Ion Features in the Inner Magnetosphere: Polar CAMMICE Observations,

Reference: AGU Spring Meeting, Boston, MA, May 26-29, 1998.

Reference Type: Contributed Talk

CEPPAD: true

CAMMICE: true

RAPID: false

Abstract: 
Since launch in February 1996 the Polar satellite has made numerous traversals of the high latitude dayside  magnetosphere. These traversals have covered the high altitude regions of the low latitude boundary layer (LLBL), cusp, cleft, mantle and polar cap. Often, as the Polar satellite leaves the soft precipitation  region of the cusp or cleft and enters into the mantle plasma the angular distribution of 1 to 10 keV ions changes character from a convecting near isotropic one to trapped. Sometimes the trapped ions are observed throughout the cusp, cleft, and mantel. These trapped ion signatures are relatively common and the energy of the trapped ions is generally less than 10 keV. The energy of the most poleward trapped population generally decreases with increasing latitude as is expected for the mantle plasma. The angular distributions of the less than 10 keV ions have large "loss cones" indicative of a relatively weak mirror geometry. These trapped soft ion fluxes will be discussed in the context of their occurrence relative to IMF conditions, their spatial positions, and their species and charge state composition.