Wake force computation in time and frequency domain for cylindrically symmetric structures excited by bunches of electrons at the speed of light

In high energy electron/positron accelerators and storage rings intense bunches of charged particles pass cylindrically symmetric structures at almost the speed of light. These charges excite electromagnetic self fields having in general all six components. The induced fields produce highly nonlinear self forces in all three spatial directions which do limit the performance of most of existing and planned high energy machines. Two complementary approaches are presented for the computation of the electromagnetic fields in either time or frequency domain by means of a mesh method allowing for arbitrarily shaped geometries. Results of these computer codes represent a key element in analysis and prediction of performance for future high energy facilities.