NDLI: Local beam position feedback experiments on the ESRF storage ring

Content Provider	IEEE Xplore Digital Library
Author	Chung, Y. Kahana, E. Kirchman, J. Lumpkin, A. Meyer, J. Plouviez, E. Scheidt, K. Taurel, E. Ando, A. Sasaki, S. Taketani, A.
Copyright Year	1995
Description	Author affiliation: Argonne Nat. Lab., IL, USA (Chung, Y.; Kahana, E.; Kirchman, J.; Lumpkin, A.)
Abstract	This paper describes the results of local beam position feedback experiments conducted on the ESRF storage ring using digital signal processing (DSP) under the trilateral agreement of collaboration among ESRF, APS, and SPring-8. Two RF beam position monitors (BPMs) in the upstream and downstream of the insertion device (ID) and two X-ray BPMs in the sixth cell were used to monitor the electron beam and the X-ray beam emitted from the ID, respectively. The local bump coefficients were obtained using the technique of singular value decomposition (SVD) on the global response matrix for the bump magnets and all the available BPMs outside the local bump. The local response matrix was then obtained between the two three-magnet bumps and the position monitors. The data sampling frequency was 4 kHz and a proportional, integral, and derivative (PID) controller was used. The result indicates the closed-loop feedback bandwidth close to 100 Hz and clear attenuation (/spl ap/-40 dB) of the 7-Hz beam motion due to girder vibration resonance. Comparison of the results using the RF BPMs and X-ray BPMs will be also discussed.
Starting Page	2699
Ending Page	2701
File Size	306539
Page Count	3
File Format	PDF
ISBN	0780329341
DOI	10.1109/PAC.1995.505664
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-05-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Feedback Storage rings Digital signal processing Radio frequency Matrix decomposition Structural beams Collaboration Electron beams Singular value decomposition Magnets
Content Type	Text
Resource Type	Article

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