Title: Acceleration processes in a collapsing magnetic trap

Author_list: Karlicky, M.

Abstract: We study the acceleration processes in a collapsing magnetic
trap formed in the cusp structure of the flare model, using a
test-particle numerical method. Coulomb collisions and scattering are
included. It was found that if the trap collapse is sufficiently fast
and the energies of the injected electrons are sufficiently high,
electrons can be accelerated in this secondary acceleration process to
very high energies. This process gives us a new  possibility to explain
the formation of loop-top sources observed in hard X-ray and radio
emission.