A compact phase locked module of relativistic magnetrons

In order to use groups of high power oscillators together, a suitable phase-locked geometry must be developed. We have designed a module consisting of seven S-band magnetrons as an extension of our previous experiments on phase locking of two magnetrons. This module is designed to operate from a single pulsed power driver. The individual magnetrons are 2.8 GHz sources, but all are immersed in a common magnetic field. The design goal is for 10 GW radiated power. Phase locking is achieved by waveguides connecting vanes of the various magnetrons. We discuss the possible interconnection geometries, which have been modelled to obtain locking time scales. Operational characteristics of the module experiment will be reported.