Fine structure of the polar cusp as deduced from the plasma wave and plasma measurements
Abstract
The plasma waves are one of the most significant feature of plasma. They are very sensitive indicator of the boundaries and inner structure of different regions in space plasmas. The data gathered onboard of Interball 1 and Magion 4 in the polar cusp indicate that plasma wave intensity changes very rapidly with some characteristic period different to satellite rotation period. Comparison with plasma data suggest that it could be associated with real inner structure of the polar cusp. Similar effect has been seen in the data from Prognoz 8 and Freja satellites. CLUSTER data also confirm these effects. In our presentation we will give the analysis of the wave and plasma data from these satellites associated with fine (filamentary) structures in the cusp. This kind of filamentary structure plasma is often associated with current instabilities and the polar cusp can be assumed as a laboratory for studies of the plasma nonlinear processes.
- Publication:
-
34th COSPAR Scientific Assembly
- Pub Date:
- 2002
- Bibcode:
- 2002cosp...34E2130B