FINITE-ELEMENT MODELING OF CHARGED BEAMS

Modelling of charged particle beams requires the solution of an electr ostatic Poisson problem where the space charge density associated with the beam can be determined by means of iterative procedures coupling the field to the motion of the particles. The main critical points of the procedure are: the coupling of field and motion equations and comp utational burden of the whole process. A computer code for this purpos e has been developed, different algorithms for the determination of sp ace charge density and new techniques to speed up solution are present ed and results discussed.