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Article
Title	Reaching the Sub Per Mil Level Coupling Corrections in the LHC
Related title	REACHING THE SUB PER MIL LEVEL COUPLING CORRECTIONS IN THE LHC
Author(s)	Høydalsvik, Eirik (CERN ; Norwegian U. Sci. Tech.) ; Persson, Tobias H B (CERN)
Publication	JACoW, 2021
Number of pages	4
In:	JACoW IPAC 2021 (2021) 3752-3755
In:	12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.3752-3755
DOI	10.18429/JACoW-IPAC2021-THPAB001 (publication)
Subject category	Accelerators and Storage Rings
Abstract	The High Luminosity LHC (HL-LHC) is requiring sub per mil coupling correction, as defined by the closest tune approach. In this article, the current coupling correction strategy is analyzed in order to understand if it can robustly correct to these very low levels. The impact of realistic errors on the coupling correction is investigated with MAD-X simulations, including the influence of local coupling on the global coupling correction. Through simulations and measurements in the LHC, the effect of BPM noise on the coupling correction is analyzed.
Copyright/License	publication: © 2021 (License: CC-BY-3.0)

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