CERN Accelerating science

Article
Title	Chapter 21: Beam from Injectors: The LHC Injectors Upgrade (LIU) Project
Author(s)	Meddahi, M (CERN) ; Rumolo, G (CERN) ; Alemany, R (CERN) ; Bartosik, H (CERN) ; Bellodi, G (CERN) ; Coupard, J (CERN) ; Damerau, H (CERN) ; Di Giovanni, G P (CERN) ; Funken, A (CERN) ; Garoby, R ; Gilardoni, S (CERN) ; Goddard, B (CERN) ; Hanke, K (CERN) ; Huschauer, A (CERN) ; Kain, V (CERN) ; Lombardi, A (CERN) ; Manglunki, D (CERN) ; Mikulec, B (CERN) ; Pedrosa, F (CERN) ; Prodon, S (CERN) ; Scrivens, R (CERN) ; Shaposhnikova, E (CERN)
Publication	2024
Number of pages	17
In:	Adv. Ser. Direct. High Energy Phys. 31 (2024) 457-473
In:	The High Luminosity Large Hadron Collider, pp.457-473
DOI	10.1142/9789811278952_0021
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHC
Project	CERN HL-LHC ; CERN LIU
Abstract	The LHC Injectors Upgrade (LIU) project aims at increasing the intensity and brightness in the LHC injectors in order to match the challenging requirements of the High-Luminosity LHC (HL-LHC) project, while ensuring high availability and reliable operation of the injectors complex up to the end of the HL-LHC era. Fulfilling this goal requires extensive hardware modifications and new beam dynamics solutions across the entire LHC proton and ion injection chains: the new Linac4, the Proton Synchrotron Booster (PSB), the Proton Synchrotron (PS), the Super Proton Synchrotron (SPS), together with Linac3 and the Low Energy Ion Ring (LEIR) as ion PS injectors. The great majority of the LIU hardware modifications have been implemented during the 2019-2020 CERN accelerators shutdown. This chapter describes the various project phases, highlights the past and future challenges, and concludes on the expected beam parameter reach and ramp-up, together with the risks and mitigations.
Copyright/License	© 2024 The Editor(s) (License: CC-BY-NC-4.0)

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