A New Mechanism for Excitation of Waves in a Magnetoplasma: I. Linear Theory

  1. Tom Chang,
  2. M. K. Hudson,
  3. J. R. Jasperse,
  4. R. G. Johnson,
  5. P. M. Kintner and
  6. M. Schulz
  1. G. Ganguli1,
  2. Y. C. Lee1 and
  3. P. J. Palmadesso2

Published Online: 21 MAR 2013

DOI: 10.1029/GM038p0297

Ion Acceleration in the Magnetosphere and Ionosphere

Ion Acceleration in the Magnetosphere and Ionosphere

How to Cite

Ganguli, G., Lee, Y. C. and Palmadesso, P. J. (1986) A New Mechanism for Excitation of Waves in a Magnetoplasma: I. Linear Theory, in Ion Acceleration in the Magnetosphere and Ionosphere (eds T. Chang, M. K. Hudson, J. R. Jasperse, R. G. Johnson, P. M. Kintner and M. Schulz), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM038p0297

Author Information

  1. 1

    Science Applications International Corporation, 8200 Greensboro Drive, McLean, VA 22102

  2. 2

    Naval Research Laboratory, Washington, D.C. 20375-5000

Publication History

  1. Published Online: 21 MAR 2013
  2. Published Print: 1 JAN 1986

ISBN Information

Print ISBN: 9780875900636

Online ISBN: 9781118664216

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Keywords:

  • Magnetosphere—Congresses;
  • Ionosphere—Congresses;
  • Ion flow dynamics—Congresses;
  • Space plasmas—Congresses

Summary

We suggest a new mechanism for exciting waves in a magnetoplasma containing a transverse component of a nonuniform electric field. The energy density of the waves can become negative in the region where the transverse electric field is localized while it is positive outside this region. The coupling of the two adjoining regions through a nonlocal wavepacket allows a flow of energy from the negative energy region towards the positive energy region. This enables the mode to grow. We use ion cyclotron waves as an example to display the subtler features of the mechanism.