MIA analysis of FPGA BPMs and beam optics at APS

JI Da-Heng; WANG Chun-Xi; QIN Qing

doi:10.1088/1674-1137/36/11/015

Chinese Physics C> 2012, Vol. 36> Issue(11) : 1120-1125 DOI: 10.1088/1674-1137/36/11/015

MIA analysis of FPGA BPMs and beam optics at APS

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Abstract：
Model independent analysis, which was developed for high precision and fast beam dynamics analysis, is a promising diagnostic tool for modern accelerators. We implemented a series of methods to analyze the turn-by-turn BPM data. Green's functions corresponding to the local transfer matrix elements R₁₂ or R₃₄ are extracted from BPM data and fitted with the model lattice using least-square fitting. Here, we report experimental results obtained from analyzing the transverse motion of a beam in the storage ring at the Advanced Photon Source. BPM gains and uncoupled optics parameters are successfully determined. Quadrupole strengths are adjusted for fitting but can not be uniquely determined in general due to an insufficient number of BPMs.

References

[1]

Irwin J, WANG C X, YAN Y et al. Phys. Rev. Lett., 1999, 82(8): 1684[2] WANG Chun-Xi. Model Independent Analysis of Beam Centroid Dynamics in Accelerators. Ph.D. dissertation, Stanford University, 1999. Also available as SLAC-R-547[3] WANG C X, Borland M, Sajaev V, Kim K. BPM System Evaluation Using Model Independent Analysis. PAC2001, 2001, 1354[4] WANG Chun-Xi, John Irwin, Karl Bane, CAI Yun-Hai, Michiko Minty, Franz J. Decker, YAN Yi-Ton. SLAC-PUB-7909, 1999[5] WANG Chun-Xi. Phys. Rev. ST Accel. Beams, 2003, 6: 104001[6] WANG Chun-Xi. Measurement and Application of Betatron Modes with MIA. Particle Accelerator Conference, 2003

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JI Da-Heng, WANG Chun-Xi and QIN Qing. MIA analysis of FPGA BPMs and beam optics at APS[J]. Chinese Physics C, 2012, 36(11): 1120-1125. doi: 10.1088/1674-1137/36/11/015

JI Da-Heng, WANG Chun-Xi and QIN Qing. MIA analysis of FPGA BPMs and beam optics at APS[J]. Chinese Physics C, 2012, 36(11): 1120-1125. doi: 10.1088/1674-1137/36/11/015 shu

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Received: 2012-02-03
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

MIA analysis of FPGA BPMs and beam optics at APS

Corresponding author: JI Da-Heng,

Corresponding author: WANG Chun-Xi,

Received Date: 2012-02-03
Accepted Date: 1900-01-01
Available Online: 2012-11-05

Abstract: Model independent analysis, which was developed for high precision and fast beam dynamics analysis, is a promising diagnostic tool for modern accelerators. We implemented a series of methods to analyze the turn-by-turn BPM data. Green's functions corresponding to the local transfer matrix elements R₁₂ or R₃₄ are extracted from BPM data and fitted with the model lattice using least-square fitting. Here, we report experimental results obtained from analyzing the transverse motion of a beam in the storage ring at the Advanced Photon Source. BPM gains and uncoupled optics parameters are successfully determined. Quadrupole strengths are adjusted for fitting but can not be uniquely determined in general due to an insufficient number of BPMs.