A New Cavity Structure for Medium Energy Proton

A new structure ACDTL (Annulus Coupled Drift Tube Linac) for proton β from 0.2 to 0.5 was studied. The structure owns some advantages such as convenient manufacture, loose requirement of the manufacture errors, small volume and big coupling k1. Through the test, some characteristics of the structure are gained. It will be helpful for the future accelerator design when this structure is adopted.