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