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) : Schulz,Michael ; Koons,Harry C.
Report Date : 18 DEC 1972
Pagination or Media Count : 13
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)
Descriptors : (*MAGNETOSPHERE, WHISTLERS), VERY LOW FREQUENCY, MATHEMATICAL MODELS, IONOSPHERIC DISTURBANCES, STABILITY
Subject Categories : Atmospheric Physics
Distribution Statement : APPROVED FOR PUBLIC RELEASE