Cutoff for solar cosmic rays in Earth's magnetosphere in magnetically quiet periods

Details Cutoff for solar cosmic rays in Earth's magnetosphere in magnetically quiet periods Cutoff for solar cosmic rays in Earth's magnetosphere in magnetically quiet periods

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984rpspr...6...70b&link_type=abstract

In its USSR Rept.: Space (JPRS-USP-84-003) p 70 (SEE N84-28823 19-12) Transl. into ENGLISH from Kosmich. Issled. (USSR), v. 2

Physics

Cosmic Rays, Earth Magnetosphere, Solar Electrons, Solar Protons, Solar Wind, Cosmos Satellites, Earth (Planet), Geomagnetism, Intercosmos Satellites, Solar Activity, Sun

Scientific paper

Results are presented from an observation of the cutoff for protons and electrons in solar cosmic rays during a period of increasing solar activity 22-25 November 1977 conducted simultaneously by the Cosmos-900 and the Intercosmos-17 satellites. Details are provided of satellite positions and instrumentation used during the observation. Proton and electron streams were recorded across an energy range of 1 MeV to greater than 100 MeV. It was shown that an association exists between the pressure of the solar wind on the magnetosphere and the position of the cutoff for protons at energies greater than 1 MeV. Electrons at energies greater than 30 MeV and protons at energies of 1, 4, 10 to 13, 30 and 100 MeV are cut off at lower latitudes than shown by calculation. The structure of the cutoff boundary was determined by splitting of the drift envelope and nonadiabatic effects as the particles move in an asymmetric geomagnetic field. Results were discussed in the context of earlier observations of solar cosmic ray cutoff.

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