A simulation of ion-beam extraction mechanism from the beam-plasma heavy ion source with a folded electron collector

Ion-beam extraction mechanism from a beam-plasma heavy ion source with a folded electron collector is studied with computer simulation. The program calculates firstly equipotential lines in the extraction part of the ion source and secondly the electron trajectories drawn in the electric field. The plasma boundaries are, then, estimated graphically and finally calculated are the trajectories of the ions emitted from the estimated plasma boundaries. Some comparisons with the previous experiments are described. (author)