Cluster Observations of a Polar Cap Boundary

Details Cluster Observations of a Polar Cap Boundary Cluster Observations of a Polar Cap Boundary

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm21b09p&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SM21B-09

Physics

2764 Plasma Sheet

Scientific paper

On January 14, 2001, Cluster crossed the outer boundary of the plasma sheet into the lobe at a radial distance of about 4.4Re (-3.2 Re, -2.5Re, 1.7Re). The Cluster spacecraft during this crossing were separated by several hundred km. The Cluster Ion Spectrometer (CIS) experiment was operating in fixed energy mode detecting ions between 650-850 eV/charge. Preliminary CIS measurements here indicate presence of field-aligned ions of H+, He+, He++ and O+ and the Electric Field and Wave (EFW) experiment measured fields larger than 40 mV/m across the boundary. Time delays and varying features were recorded by the different spacecraft. This crossing was observed during the recovery phase of a substcorm. This talk will discuss the spatial, temporal and dynamical aspects of this event.

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