  Charge-breeding processes in Electron Cyclotron Resonance Ion Sources are
numerically simulated by using the target helium plasma parameters obtained
with NAM-ECRIS code. Breeding efficiency is obtained as a function of 1+ ion
injection energy for some alkali ion beams. Time dependencies of extracted ions
are calculated; typical times for reaching saturation in currents are in the
range of few tens of milliseconds. Role of charge-exchange processes in
breeding of ions is discussed. Recycling of ions on the source walls is shown
to be important.
