MODE LAUNCHER AS AN ALTERNATIVE APPROACH TO THE CAVITY-BASED RF COUPLER OF PERIODIC STRUCTURES

Recent studies of the accelerating structures at a high gradient showed problems associated with high surface electric fields. In particular it was observed that the input RF coupler of the structure suffered more severely from the surface damage caused by local RF breakdowns than regular accelerating cells. A new design of the RF coupler with reduced surface electric and magnetic fields is presented.

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