Accession Number:

AD0756461

Title:

Whistler-Duct Formation: A Magnetospheric Instability.

Descriptive Note:

Rept. for Apr-Sep 72,

Corporate Author:

AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s):

Report Date:

1972-12-18

Pagination or Media Count:

13.0

Abstract:

Magnetospheric ducts that guide very-low-frequency VLF radiation are subject to spontaneous intensification by a linear instability that arises from the coupling between the magnetosphere and the ionosphere. The elements of this instability comprise a localized enhancement of electron precipitation and a field-aligned column of enhanced plasma density, each in turn causing the other. This interaction can create fully developed plasmapheric ducts spontaneously from infinitesimal fluctuations. A whistler duct thus formed attains saturation nonlinear stabilization by virtue of ionospheric recombination and the bounded supply of electrons available for precipitation. Author

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE