ELECTRON ACCELERATION BY RANDOM DC ELECTRIC-FIELDS

We present a global model for the acceleration of electrons in the fra mework of the statistical flare model of Vlahos et al. In this model, solar flares are the result of an internal self-organized critical (SO C) process in a complex, evolving, and highly inhomogeneous active reg ion. The acceleration of electrons is due to localized DC electric fie lds closely related to the energy-release process in the active region . Our numerical results for the kinetic energy distribution of acceler ated electrons show a power-law or an exponential-law behavior, depend ing on the maximum trapping time of the energetic particles inside the acceleration volume.