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Forchi', V.

Paper Title Page
RPPA20 A Fast Orbit Feedback for the ELETTRA Storage Ring 558
  • D. Bulfone, V. Forchi', G. Gaio, L. Pivetta, M. Lonza
    ELETTRA, Basovizza, Trieste
  A fast global orbit feedback using digital Beam Position Monitor (BPM) detectors has been installed and commissioned at Elettra. The system uses 96 BPMs and 82 steerer magnets to correct closed orbit errors at a 10-kHz repetition rate. The feedback processing is performed by twelve VME stations equipped with commercial CPU boards running the Linux operating system with real-time extension and connected to each other by a low-latency fiber optic network. The system is fully controlled by a Tango based control system. A number of diagnostic and visualization software tools have been developed to easily operate the feedback and detect anomalous sources of orbit distortion. The operational experience and the achieved results are presented. Plans for further improvements of orbit stability are also discussed.