Microwave Instrumentation for Accelerator RF Sysems

In order to make detailed measurements of the rf amplifier-accelerator systems for the Los Alamos Meson Physics Facility (LAMPF) proton accelerator, it was necessary to develop better directional couplers and slotted lines. The degree of precision required in the construction and adjustment of these devices when measurements of a few percent accuracy are desired in complicated, mismatched, high-power systems is surprising. The theoretical considerations and the mechanical refinements necessary to achieve good performance are outlined in this paper.