CERN Accelerating science

Article
Title	Optics Correction Strategy for Run 3 of the LHC
Author(s)	Persson, Tobias (CERN) ; Cardona, Javier (Colombia, U. Natl.) ; Carlier, Felix (CERN) ; Costa Ojeda, Andressa (CERN) ; Dilly, Joschua (CERN) ; Ferrentino, Vittorio (CERN) ; Fol, Elena (CERN) ; García Morales, Hector (CERN) ; Hofer, Michael (CERN) ; Høydalsvik, Eirik (CERN) ; Keintzel, Jacqueline (CERN) ; Le Garrec, Mael (CERN) ; Maclean, Ewen (CERN) ; Malina, Lukas (CERN) ; Soubelet, Felix (CERN) ; Tomás García, Rogelio (CERN) ; Wegscheider, Andreas (CERN) ; van Riesen-Haupt, Léon (CERN)
Publication	2022
Number of pages	4
In:	JACoW IPAC 2022 (2022) 1687-1690
In:	13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1687-1690
DOI	10.18429/JACoW-IPAC2022-WEPOST008
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHC
Abstract	After more than 3 years of shutdown the LHC is again operational in 2022. Experience from the previous Long Shutdown (LS) has shown that the local errors in the triplet quadrupoles changed significantly between Run 1 and Run 2, and first measurements in 2022 unveil further changes. In the LHC, feed-down from the Interaction Region (IR) non-linear corrections to linear errors requires an iterative approach between the two types of corrections. In this article we describe the key measurements and corrections performed in 2021 and 2022 until the write-up of this report.
Copyright/License	CC-BY-3.0

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