Observations of centrifugal acceleration during compression of magnetosphere

Details Observations of centrifugal acceleration during compression of magnetosphere Observations of centrifugal acceleration during compression of magnetosphere

Apr 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27..915c&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 7, p. 915-918

Physics

Plasma Physics

8

Magnetospheric Physics: Magnetospheric Configuration And Dynamics, Space Plasma Physics: Charged Particle Motion And Acceleration, Space Plasma Physics: Numerical Simulation Studies, Space Plasma Physics: Transport Processes

Scientific paper

Centrifugal acceleration of escaping ionospheric plasma is one of the important and fundamental processes responsible for energizing and transporting ionospheric plasma to all regions of the magnetosphere. Normally this mechanism operates over extremely large distances. Because of this feature and limitations in particle instrumentation, it has not been possible to directly confirm from in situ plasma measurements the very specific predictions made by basic plasma theory about centrifugal acceleration. We report here data obtained near Polar satellite apogee over the northern polar cap during a magnetospheric compression event that occurred on September 24, 1998. Between 2345:18 and 2347:18 UT the magnetic field rotated by about 20° and increased in intensity. The Toroidal Imaging Mass-Angle Spectrograph (TIMAS) instrument on Polar obtained bulk velocity moments of preexisting upflowing H+, O+, He+, and He++ ions with enough precision and resolution to directly demonstrate, together with computer simulation, that the magnitude and direction of changes in plasma motion during this event follow directly from the changes in the magnetic field configuration as predicted by the equations describing centrifugal acceleration.

Affiliated with

Also associated with

No associations

Rating

Observations of centrifugal acceleration during compression of magnetosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Observations of centrifugal acceleration during compression of magnetosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations of centrifugal acceleration during compression of magnetosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-752669