  The time analysis of the signal induced by the drift of charge carriers in
high purity germanium detectors provides information on the event topology.
Millions of charge carriers are produced in a typical event. Their initial
distribution, stochastic diffusion and Coulomb self-repulsion affect the time
structure of the signal. We present a comprehensive study of these effects and
evaluate their impact on the event discrimination capabilities for the three
geometries which will be used in the Legend experiment for neutrinoless
double-beta decay.
