Mechanical design of the SNS coupled cavity accelerator

The mechanical design and manufacturing details of the Spallation Neutron Source Coupled Cavity Linac are presented. The mechanical design and manufacturing approach for the RF cavity components is and results of initial development work for manufacturing is presented. The RF cavity components include both the main accelerating cavity structure (RF Segments) and the bridge couplers. The design utilizes a relatively standard approach for the RF accelerating segments but novel packaging techniques for the bridge coupler allow a minimum length coupler to be used. The resulting structure allows for a short magnetic focusing period and straightforward tuning of the multi-segment module.