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TUOB02 |
Optics Measurements in Storage Rings: Simultaneous 3-Dimensional Beam Excitation and Novel Harmonic Analysis |
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- L. Malina, J.M. Coello de Portugal, J. Dilly, P.K. Skowroński, R. Tomás
CERN, Geneva, Switzerland
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Optics measurements in storage rings employ turn-by-turn data of transversely excited beams. Chromatic parameters need measurements to be repeated at different beam energies, which is time-consuming. We present an optics measurement method based on adiabatic simultaneous 3-dimensional beam excitation, where no repetition at different energies is needed. In the LHC, the method has been successfully demonstrated utilising AC-dipoles combined with RF frequency modulation. It allows measuring the linear optics parameters and chromatic properties at the same time without resolution deterioration. We also present a new accurate harmonic analysis algorithm that exploits the noise cleaning based on singular value decomposition to compress the input data. In the LHC, this sped up harmonic analysis by a factor up to 300. These methods are becoming a "push the button" operational tool to measure the optics.
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Slides TUOB02 [1.117 MB]
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IBIC2018-TUOB02
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About • |
paper received ※ 04 September 2018 paper accepted ※ 10 September 2018 issue date ※ 29 January 2019 |
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