MOPC13

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URL	https://doi.org/10.18429/JACoW-IPAC2024-MOPC13
Title	Sextupole RDTs in the LHC at injection and in the ramp
Authors	S. Horney, A. Wegscheider, E. Fol, E. Maclean, F. Soubelet, J. Keintzel, J. Dilly, L. Deniau, M. Le Garrec, M. Hofer, R. Tomas, T. Persson European Organization for Nuclear Research F. Carlier, L. van Riesen-Haupt Ecole Polytechnique Fédérale de Lausanne P. Burrows John Adams Institute V. Ferrentino University of Naples Federico II
Abstract	During 2023, examination of the action dependence of sextupolar resonance driving terms (RDT) in the LHC at injection, as measured with an AC-dipole, demonstrated that a robust measurement of the RDTs could still be achieved even with very small amplitude kicks, typically used for linear optics studies. Consequently, analysis of optics measurements from 2022 and 2023 during the LHC energy ramp allowed a first measurement of the sextupole resonance evolution. A large asymmetry was observed between the two LHC beams, with the clockwise circulating beam (LHCB1) significantly worse than the counter-clockwise circulating beam (LHCB2), and a clear increase in the RDT strength during the ramp was observed. Results are presented and compared to MAD-X simulations, in this report.
Paper	download: MOPC13.pdf
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Conference	15th International Particle Accelerator Conference
Series
Location	Nashville, TN
Date	19-24 May 2024
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	Fulvia Pilat - Oak Ridge National Laboratory Wolfram Fischer - Brookhaven National Laboratory Robert Saethre - Oak Ridge National Laboratory Petr Anisimov - Los Alamos National Laboratory Ivan Andrian - Elettra-Sincrotrone Trieste S.C.p.A.
Online ISBN	978-3-95450-247-9
Online ISSN	2673-5490
Received	13 May 2024
Revised	23 May 2024
Accepted	23 May 2024
Issued	01 July 2024
DOI	10.18429/JACoW-IPAC2024-MOPC13
Pages	71-74
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