Accession Number : ADA185437

Title :   Observations of Electron Cyclotron Harmonic Emissions Associated with Field-Aligned Electron Beams.

Descriptive Note : Technical rept.,

Corporate Author : AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS

Personal Author(s) : Koons, Harry C ; Edgar, Bruce C ; Fennell, Joseph F ; Gorney, David J

PDF Url : ADA185437

Report Date : 01 Jul 1987

Pagination or Media Count : 29

Abstract : Several cases have been found in plasma wave and electron distribution function data from the SCATHA satellite in which strong gyrofrequency emissions near 1.5 times the local electron gyrofrequency, f sub g, correlate in time with field-aligned electron beams. The energy of the electron beams ranges from 100 to 800 eV. Before the beam appears the emissions are observed at a lower frequency, typically 1.1 to 1.2 f sub g. As the beam develops, the emissions rise in frequency and grow in amplitude. Above 2 keV the electrons had a normal loss-cone distribution. This loss cone deepened by a small amount when the beams appeared at lower energy. These observations were made near local midnight between L=7.0 and 7.8 R sub e.

Descriptors :   *PLASMA WAVES, *IONOSPHERIC DISTURBANCES, *ELECTRON BEAMS, CYCLOTRON WAVES, HARMONICS, ALIGNMENT, ELECTRIC FIELDS

Subject Categories : Atmospheric Physics
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE