  The Coupled Cavity Drift Tube Linac (CCDTL) used in the Accelerator for the
Production of Tritium (APT) is fully described elsewhere [1]. The modules are
composed of several machined and brazed segments that must account for the
accumulation of dimensional tolerances in the build up of the stack. In
addition, space requirements dictate that power fed to the accelerator cannot
be through the accelerating cavities. As well, we would like to remove a single
segment of the accelerator without removing additional segments. These
requirements combined with phasing relationships of the design and space
limitations have resulted in a different bridge coupling method used in the
module comprising 3-gap segments. The coupling method, phasing relationships
and other features that enhance the flexibility of the design will be
discussed.
