A multi-moded RF Delay Line Distribution System for the next linear collider

The Delay Line Distribution System (DLDS) (1) is an alternative to conventional pulse compression which enhances the peak power of an rf soul ce while matching the. long pulse of that source to the shorter tilling rime of the accelerator structure. We present a variation on that scheme that combines the parallel delay lilies of the system into one single line. The power of several sources; is combined into a single waveguide delay? line using a multi-mode launcher. The output mode of the launcher is determined by the phase coding of the input signals. The combined power is extracted using several mode extractors, each of which extracts only one single mode. Hence, the phase coding of the sources controls the output port of the combined power. The power is then fed to the local accelerator structures. We present a derailed design of such a system, including several implementation methods for the launchers, extractors, and ancillary high power rf components. The system is designed so that it can handle the 600 MW peak power required by; the NL design, while maintaining high efficiency.