Self-consistent theory of triggered whistler emissions

Details Self-consistent theory of triggered whistler emissions Self-consistent theory of triggered whistler emissions

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.5665m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, June 1, 1988, p. 5665-5683. Navy-sponsored research.

Physics

29

Kinetic Theory, Very Low Frequencies, Whistlers, Atmospheric Physics, Polar Regions

Scientific paper

A kinetic theory of triggered VLF whistler emissions is presented together with the first results obtained from it. The theory is capable of predicting, from a small-scale numerical implementation, the observed emission forms and frequency-time characteristics. The triggering process is explained, and the threshold behavior is demonstrated together with the generation of specific falling frequency emissions whose falling rate compares favorably with typical observations made at the Siple Station, Antarctica. The theoretical triggering mechanism is shown to account for the observed threshold behavior, when short triggering pulses of nominal amplitude of about 1 pT and duration of 100 ms or less cannot generate an emission, whereas those in the range of 200 ms and longer do. Similar sensitivity is found with respect to initial frequency.

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