Solar modulation and interplanetary gradients of the galactic electrons flux, 1977 - 1984

Details Solar modulation and interplanetary gradients of the galactic electrons flux, 1977 - 1984 Solar modulation and interplanetary gradients of the galactic electrons flux, 1977 - 1984

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....5..197c&link_type=abstract

In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 5 p 197 (SEE N85-34991 23-93)

Computer Science

Cosmic Rays, Electrons, Galactic Radiation, Interplanetary Medium, Protons, Flux (Rate), Interplanetary Space, Pioneer 10 Space Probe, Voyager 1 Spacecraft, Voyager 2 Spacecraft

Scientific paper

The flux of electrons with energy from approx. 10 to 180 MeV measured with the electron telescope on the Voyager 1 and 2 spacecraft in the heliocentric radial range 1 - 22 AU between 1977 and 1984 is reported. Jovian electrons were clearly observable between 1978 and 1983 (radial range 2 - 12 AU) at energies below approx. 50 MeV. Above approx. 50 MeV the electron intensity exhibited temporal variations generally related to the 11 year modulation of protons 75 MeV. The overall magnitude of the electron intensity changes between the maximum intensity observed in 1977 and the minimum intensity in 1981 was a factor approx. 2, also comparable to that observed for 75 MeV protons. By early 1985 the electron intensity had apparently recovered to the level observed in 1977 whereas the proton intensity was still about 20% lower. A detailed interpretation of these electron variations in all energy channels depends on an accurate subtraction of background induced by energetic protons of a few 100 MeV. This subtraction is facilitated by calibration results at several energies.

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