Banded Electron Cyclotron Harmonic Instability — A First Comparison of Theory and Experiment

  • K. Rönnmark
  • H. Borg
  • P. J. Christiansen
  • M. P. Gough
  • D. Jones


A study, which is the first of its kind, uses information derived from simultaneously measured wave spectra and particle distributions as the input to a theoretical linear instability model of an electrostatic cyclotron harmonic wave event recorded on GEOS-1. The presence of a hot loss cone component of the particle distribution is established experimentally, and the model accounts reasonably for the observed frequencies and relative strengths of the (n+1/2)f c and upper hybrid emission features.


Electron Distribution Function Loss Cone Geomagnetic Equator Ambient Magnetic Field Hybrid Frequency 
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Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1978

Authors and Affiliations

  • K. Rönnmark
    • 1
  • H. Borg
    • 1
  • P. J. Christiansen
    • 2
  • M. P. Gough
    • 2
  • D. Jones
    • 3
  1. 1.Plasma Physics DepartmentUniversity of Umea, and Kiruna Geophysical InstituteSweden
  2. 2.Plasma and Space Physics Group, School of Mathematical & Physical SciencesUniversity of SussexUK
  3. 3.Space Sciences DivisionE.S.A., E.S.T.E.C.NoordwijkHolland

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