Magnetospheric dynamics and wave-particle interactionsIt has been demonstrated that two general classes of wave-particle interactions are of great importance for magnetospheric dynamics. Electromagnetic and electrostatic plasma instabilities give rise to relatively narrow-banded spontaneous emissions (e.g., ELF hiss, chorus, three-halves noise, ion cyclotron and ion-plasma-frequency turbulence) that can scatter trapped particles into the loss cone, leading to modified pitch-angle distributions, stable trapping limits, diffuse aurora, proton precipitation events, etc. The current-driven plasma instabilities give rise to impulsive ion acoustic or Buneman mode turbulence that provides very effective energy transfer (via the anomalous conductivity mechanism) at the bow shock and in regions where strong field-aligned currents are observed. We review these interactions and identify significant open questions that must be investigated during the IMS.
Document ID
19760054352
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Scarf, F. L. (TRW Systems Group Redondo Beach, Calif., United States)
Russell, C. T. (California, University Los Angeles, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Subject Category
Geophysics
Meeting Information
Meeting: The scientific satellite programme during the International Magnetospheric Study