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Magnetic Reconnection is an efficient and fast acceleration mechanism bymeans of direct electric field acceleration parallel to the magnetic field.Thus, acceleration of particles in reconnection regions is a very importanttopic in plasma astrophysics. This paper shows that the conventional analyticalmodels and numerical test particle investigations can be misleading concerningthe energy distribution of the accelerated particles, since they oversimplifythe electric field structure by the assumption that the field is homogeneous.These investigations of the acceleration of charged test particles are extendedby considering three-dimensional field configurations characterized bylocalized field-aligned electric fields. Moreover, effects of radiative lossesare discussed. The comparison between homogeneous and inhomogeneous electricfield acceleration in reconnection regions shows dramatic differencesconcerning both, the maximum particle energy and the form of the energydistribution.Comment: 11 pages, 21 figure

Particle acceleration in three-dimensional reconnection regions: A new test particle approach