Abstract
We have studied a multi-mode Delay Line Distribution System (DLDS) as the RF power distribution system from klystrons to RF structures for linear colliders. In particular, a 2/spl times/2 DLDS has been proposed and studied at KEK for Japan Linear Collider (JLC). It has been proved that the 2/spl times/2 DLDS is simple, bus has good transmission efficiency. We have designed RF components of a basic unit of a DLDS using the High Frequency Structure Simulator (HFSS) code. They include the TE/sub 01/ extractor, the TE/sub 11/ to TE/sub 01/ converter, and the TE/sub 11/ to TE/sub 12/ converter for TE/sub 12/ mode. HFSS calculation of the system, which consists of TE/sub 01/ extractor and TE/sub 11/ to TE/sub 01/ converter, shows that the transmission efficiency of each mode is better than 95%. The components, as well as the system are being studied experimentally. A low power test model for the mode stability experiment in 55 m long wave guide in DLDS is also being developed.
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