ENGINEERING DESIGN AND FABRICATION OF X-BAND DAMPED DETUNED STRUCTURE FOR THE CLIC STUDY

A Damped Detuned Structure (DDS), known as CLIC_DDS_A [1], has been designed for the Compact Linear Collider (CLIC) study, and is presently under fabrication. The wakefield in the DDS structures is suppressed using a combination of detuning the frequencies of beam-excited higher order modes and by light damping, through slot-coupled manifolds. The broad principles of the design are similar to that used in the NLC/GLC [2]. CLIC_DDS_A is conceived to be tested for its capacity to sustain high gradients at CERN. We report on engineering design and fabrication details of the structure. This design takes into account practical mechanical engineering issues and is the result of several optimizations since the earlier CLIC_DDS concept.