[Ferrando 1993 a]
Propagation of jovian electrons in and out of the ecliptic.
P. Ferrando, R. Ducros, C. Rastoin, A. Raviart,
H. Kunow, R. Müller-Mellin, H. Sierks and G. Wibberenz.
Propagation of jovian electrons in and out of the ecliptic.
Advances in Space Research 13, 107-110. 1993
Contents
Since its switch-on in October 1990, the Kiel Electron Telescope onboard
Ulysses has detected many quiet time increases of the flux of 3-30 MeV
electrons, known to originate from Jupiter.
We report on the long term variations of this flux for the Ulysses ecliptic
journey, and at the beginning of the out of ecliptic phase.
They are well accounted for by a simple convection-diffusion model, with
diffusion coefficients along and perpendicular to the magnetic field of about
5 x 1022 and 8 x 1020sq cm/s
respectively.
In addition to the long term flux variations, several short bursts of electrons
were detected, particularly after the Jupiter fly-by at southern latitudes.
Their duration is about 1 hour or less, and they show a very strong
anisotropy in the general direction of Jupiter.
They are more numerous and are found at larger distances after encounter
than before.
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