Analysis of ion extraction and collecting by electrostatic field method

Several ion extraction methods were numerically simulated by using two dimensional electron non-equilibrium model. The influence of the model to potential was analyzed. Ion extraction and collecting character under different voltage, the relation of collecting time with shield stripping, and collision and sputtering effect were simulated. The results show that the improved M type electrode method is better than the parallel electrode method for both collecting time and collecting rate. (authors)