Surface integral equation analysis of quasi-optical launchers

Modern high-power gyrotrons typically use a mode converter and launcher to convert the high-order cavity mode to a Gaussian like output mode. Efficiencies of the conversion are usually only 85%-90%. The analysis codes used to design these systems are based on approximate techniques which are not sufficiently accurate to allow design of higher efficiency converters. We have developed an analysis code based on the magnetic field integral equation. This approach will give engineers a tool for design of more efficient converter and launcher systems.