Replenishment of electrons lost in the south atlantic anomaly by gyroresonant pitch-angle diffusion

Margalit Ben-Ari, Aharon Eviatar

Research output: Contribution to journalArticlepeer-review

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 pitch-angle 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 electro-magnetic waves leads to the conclusion that the observed wave spectral density can yield the needed diffusion coefficient.

Original languageEnglish
Pages (from-to)671-691
Number of pages21
JournalPlanetary and Space Science
Volume23
Issue number4
DOIs
StatePublished - Apr 1975

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