Evidence for very weak pitch angle diffusion of outer zone electrons

Details Evidence for very weak pitch angle diffusion of outer zone electrons Evidence for very weak pitch angle diffusion of outer zone electrons

Nov 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.5091l&link_type=abstract

Journal of Geophysical Research, vol. 82, Nov. 1, 1977, p. 5091-5098.

Physics

Electron Diffusion, Magnetically Trapped Particles, Ogo-6, Radiation Belts, Angular Distribution, Electron Scattering, Pitch (Inclination), Satellite-Borne Instruments

Scientific paper

The low-altitude polar-orbiting satellite OGO 6 was used to measure integral fluxes of locally trapped and loss cone electrons greater than 30 keV. The observed ratios of precipitated to locally trapped electron intensities were found to be a few percent in the outer zone, weak pitch diffusion region. Ratios of backscattered to precipitated electrons were often greater than 1 in cases where they should not exceed unity. It is noted that both loss cone detectors were usually counting a significant flux of locally trapped electrons scattered off the walls of their respective collimators. The values found under conditions leading to a minimum of wall-scattered electrons in the precipitation loss cone detector are consistent with theoretical calculations for weak whistler mode magnetic field amplitudes of the scattering waves. It is suggested that previously reported loss cone/trapped flux ratios of a few percent are not representative of minimum diffusion conditions.

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