Longitude and pitch-angle distributions of streams of high-energy electrons under Earth's radiation belts

Statistics – Computation

Scientific paper

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Cosmic Ray Albedo, Cosmic Ray Showers, High Energy Electrons, Magnetically Trapped Particles, Radiation Belts, Electron Flux Density, Longitude, Salyut Space Station, Secondary Cosmic Rays

Scientific paper

The results of measurements of fluxes of electrons with energies Ee = 460MeV in a wide range of longitudes and pitch angles are given, together with the experimental dependences of the mean fluxes of albedo and quasi-trapped electrons (determined from the pitch-angle and longitude distributions) on the drift shell parameter L and the geomagnetic cutoff rigidity threshold. The measurements were made using the Yelena-F gamma-telescope on the Salyut-6 orbital station with definite spatial orientations of the station and instrument. The station had an orbital inclination of 51.6 deg. There were nine measurement sessions with different telescope positions relative to the station axes. On the basis of the pitch-angle distributions and results of computations of the limiting pitch angle separating electrons into albedo (having reflection points in the Northern and Southern Hemispheres below the altitude h 60 km) and quasitrapped (by the geomagnetic field (H 60 km) particles it was possible to determine the fluxes of electrons of both types.

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