Accession Number : AD0810367

Title :   INNER ZONE ELECTRONS IN 1964 AND 1965.

Descriptive Note : Rept. for Aug 64-Dec 65,

Corporate Author : AEROSPACE CORP EL SEGUNDO CA LABS DIV

Personal Author(s) : Paulikas, George A. ; Blake, J. Bernard ; Freden, Stanley C.

Report Date : MAR 1967

Pagination or Media Count : 31

Abstract : Measurements of the fluxes and spectra of energetic (electron energy = or > 0.8 MeV) electrons were made in 1964 and 1965 with satellites 1964-45A and 1965-78A (OV1-2) in the inner radiation belt. At the time of these measurements the trapped electron flux was still dominated by artificially injected electrons dating from the Starfish test. In December 1964 the peak flux of electrons with energy = or > 4.5 MeV was located at the magnetic equator at L = 1.35; the flux there was 1,000,000/sq cm/sec. Decay times of electrons of 4.5 MeV energy (or greater) at the magnetic equator are 197 + or - 22 days at L = 1.25, 442 + or - 93 days at L = 1.40 and 373 + or - 67 days at L = 1.50. The decay times do not appear to differ significantly for electrons > 1.6 MeV. The electron spectrum above 1.6 MeV softens with increasing L for > 1.5; the spectrum varies only weakly along field lines. (Author)

Descriptors :   *ELECTRONS, VAN ALLEN RADIATION BELT, ENERGY, DETERIORATION, NUCLEAR EXPLOSIONS, COSMIC RAYS, DIFFUSION, PARTICLE SPECTRA, PROTONS.

Subject Categories : Astronautics

Distribution Statement : APPROVED FOR PUBLIC RELEASE