Abstract:
The closed orbit measurement system at the Duke storage ring
is comprised of 34 Bergoz beam position monitors (BPMs). To
accommodate many different operation modes of the storage
ring, the BPM system needs to be tailored to work with a
wide range of signal levels. In the first part of the paper,
we report the recent work on improving the performance of
the BPM system for a variety of beam conditions. The second
part of the paper focuses on the closed orbit correction and
feedback systems on the Duke storage ring, including local
orbit bumps for insertion devices and end-of-arc orbit
compensation, a global orbit correction system, and a slow
orbit feedback system. We report the measurements and
performance of the orbit orrection and feedback system.