Bobby McKee

We have implemented 3 major improvements to the damping ring RF-cavities. We have designed, fabricated, and installed in two locations a new tuner assembly that uses wire-scanner ball-screws for improved reliability. This assembly is pre-aligned for ease of installation. We have also designed and released for procurement the thicker RF-cavity windows. The ceramic is now .600 inches thick. This is twice as thick as the present windows installed on the cavities. We hope to install one of these on RFC-590 this downtime. Finally, we installed RF screens that double as flange gaskets in all the HIPs on all the cavities. Data is showing significant improvement of the RF-cavity vacuum.