Replenishment of electrons lost in the south atlantic anomaly by gyroresonant pitchangle diffusion
Abstract
Experimental data describing the effect of the South Atlantic anomaly on E⩾ 280 keV electron flux at L = 2 and high B values, are compared to the numerical solution of a pitchangle diffusion equation with a varying loss cone. The diffusion coefficient needed to explain replenishment of the electrons lost over the anomaly is found to be 3.2 × 10 ^{2} sec ^{1} Calculation of the diffusion coefficient due to cyclotron resonant interaction with VLF electromagnetic waves leads to the conclusion that the observed wave spectral density can yield the needed diffusion coefficient.
 Publication:

Planetary and Space Science
 Pub Date:
 April 1975
 DOI:
 10.1016/00320633(75)901075
 Bibcode:
 1975P&SS...23..671B
 Keywords:

 Cyclotron Resonance;
 Diffusion Coefficient;
 Electron Diffusion;
 Ionospheric Electron Density;
 Magnetic Anomalies;
 Atlantic Ocean;
 Finite Difference Theory;
 Longitude;
 Pitch (Inclination);
 Radiation Belts;
 Replenishment;
 Wave Amplification;
 Wave Interaction;
 Geophysics