Accession Number:

ADA053647

Title:

Nonlinear Analysis of Plasma Instability Excited by the Auroral Electrojet.

Descriptive Note:

Final rept. 1 Oct 76-31 Dec 77,

Corporate Author:

MICHIGAN UNIV ANN ARBOR SPACE PHYSICS RESEARCH LAB

Report Date:

1978-01-24

Pagination or Media Count:

20.0

Abstract:

The two-fluid electron and ion continuity and momentum equations are expanded in terms of the amplitudes of the fluctuations, and the nonlinear dispersion relation is derived. From this expression the threshold condition when the growth rate 0 as well as the condition for instability when the growth rate 0 are obtained. In addition, the order of magnitude of the density fluctuations is estimated which agrees with that observed by Booker. It is shown that these results can be obtained only with the nonlinear theory. Finally, it is shown that as a result of electric field measurements by Kelley and Mozer our theory predicts that the wave propagation vector of the irregularities must have a small, but nonvanishing, component parallel to the east-west direction. Author

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE