A Self-Consistent Theory of Triggered VLF Emissions

  • David Nunn
Part of the Astrophysics and Space Science Library book series (ASSL, volume 44)


This work attempts a theoretical self-consistent description of the phenomenon of artificially triggered VLF emissions. The observations of this process are well known (Helliwell, 1965). High power VLF transmitters (e.g. NAA, NPG) transmit monochromatic morse pulses ~ 14 kHz. These signals parallel propagate along a magnetospheric field line in a ducted mode. As a result of interaction with cyclotron resonant electrons such pulses are often observed to ‘trigger’ large amplitude narrow band emissions with sweeping frequencies.


Wave Field Trap Particle Duct Leakage Trapping Frequency Duct Mode 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Bell, T. F. and Helliwell, R. A.: 1971, J. Geophys. Res. 76, 8414.ADSCrossRefGoogle Scholar
  2. Helliwell, R. A.: 1965, Whistlers and Related Ionospheric Phenomena, Stanford University Press, Stanford, Calif.Google Scholar
  3. Helliwell, R. A.: 1967, J. Geophys. Res. 72, 4773.ADSCrossRefGoogle Scholar
  4. Kimura, I: 1968, J. Geophys. Res. 73, 445.ADSCrossRefGoogle Scholar
  5. Nunn, D.: 1973, J. Plasma Phys.,in press.Google Scholar
  6. Nunn, D.: 1974, Planet. Space Sci. 22, 349.ADSCrossRefGoogle Scholar
  7. Roux, A.: 1974, this volume, p. 297.Google Scholar

Copyright information

© D. Reidel Publishing Company, Dordrecht-Holland 1974

Authors and Affiliations

  • David Nunn
    • 1
  1. 1.Department of MathematicsKings CollegeLondonEngland

Personalised recommendations