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| WEPB21 |
Kicker Based Tune Measurement for DELTA
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277 |
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- P. Hartmann, J. Fürsch, T. Weis, K. Wille
DELTA, Dortmund
- R. Wagner
Bergische Universität Wuppertal, Wuppertal
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We have set up a tune measurement for the electron storage ring Delta based on broadband beam excitation with a kicker magnet and measurement of the relaxation betatron oscillations turn-by-turn. By averaging over several kicks the kick amplitude may be as low as 600 nrad in standard user runs at nominal current, leading to negligible beam distortion. Signal to noise ratios in excess of 10 are reliably achieved down to 200 uA beam current using a maximum kicker amplitude of 10 urad. A simple tune feedback algorithm compensates for tune shifts due to vacuum chamber movement and orbit movement in sextupoles.
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