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| WEPLT084 |
Experimental Frequency Maps for the ESRF Storage Ring
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2047 |
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- Y. Papaphilippou, L. Farvacque, E. Plouviez, J.-L. Revol, A. Ropert
ESRF, Grenoble
- J. Laskar
IMCCE, Paris
- Ch. Skokos
Academy of Athens, Athens
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Experimental frequency maps have already revealed many unknown characteristics of the ESRF storage ring non-linear dynamics. In the past year, several efforts were undertaken in order to establish this technique as an operational on-line tool. The acquisition time was significantly reduced by collecting data from a dedicated fast BPM system. The problem of beam decoherence was limited by establishing a method for accurate tune determination in a small number of turns, using the information from all the BPMs around the ring. The possibility to explore the off-momentum dynamics by exciting the beam, with synchronous transverse and longitudinal kicks was also investigated. Finally, measurements of resonance driving term amplitudes and phase advances were used to identify the efficiency of resonance corrections.
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