Program for simulating ion storage in electron beams

The ION program meant for simulating processes in electron-ion beams using the large-sized particle method is described. The program permits to study electron-ion and ion-ion processes, as well as dynamics of the distribution functions considering at the same time up to 10000 particles representing the electron and several ion components. The calculation results for accumulation of ions with four different charges in an electron beam and the data characterizing variations of root-mean-square dimensions of the electron and ion components depending on the beam neutralization factor are given