Superfish-a Computer Program for Evaluation of RF Cavities with Cylindrical Symmetry

The difference equations for axisymmetric fields are formulated in an irregular triangular mesh, and solved with a direct, noniterative method. This allows evaluation of resonance frequencies, fields, and secondary quantities in extreme geometries, and for the fundamental as well as higher modes. Finding and evaluating one mode for a 2000 point problem takes of the order of 10 sec on the CDC 7600.