  During solar flares fast electron beams generated in the solar corona are
non-thermal radio sources in terms of type III bursts. Sometimes they can enter
into the interplanetary space, where they can be observed by in-situ
measurements as it is done e.g. by the WIND spacecraft. On the other hand, they
can be the source of non-thermal X-ray radiation as e.g. observed by RHESSI, if
they precipitate toward the dense chromosphere due to bremsstrahlung. Since
these energetic electrons are generated in the corona and observed at another
site, the study of transport of such electrons in the corona and interplanetary
space is of special interest. The transport of electrons is influenced by the
global magnetic and electric field as well as local Coulomb collisions with the
particles in the background plasma.
