DELAYED GENERATION OF AN ELECTROMAGNETIC PULSE IN THE IONOSPHERE AND IN OTHER MAGNETO-PLASMAS,
Abstract
This report is concerned with the physical process responsible for the delayed generation of an electromagnetic pulse in the ionosphere. This effect, which is caused by electron resonance, often shows up in high latitude, topside spread F ionograms as a trace that protrudes from the spread F of the extraordinary wave trace. It occurs at frequencies slightly greater than twice the electron gyrofrequency at the height of the satellite (E. L. Hagg, 1966). The characteristics of this trace (remote resonance trace) can be explained by the following model: a transmitted pulse of angular frequency omega propagates downward, along a magnetic field-aligned wave guide, through the height at which omega is equal to twice the angular electron gyrofrequency 2 omega sub H. A gradient in the electric field of the transmitted wave results from the wave propagating along the guide. Due to this gradient, electrons gyrating about the magnetic field with certain phases (measured from a fixed direction in a plane normal to the magnetic field) can gain energy from the wave, whereas electrons with other phases can lose energy to the wave; the electrons can thus be considered to be 'energy bunched'.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1967
- Accession Number
- AD0809025
Entities
People
- D. B. Muldrew
Organizations
- Communications Research Centre Canada