CERN Accelerating science

Article
Title	Achievements and Performance Prospects of the Upgraded LHC Injectors
Author(s)	Kain, Verena (CERN) ; Albright, Simon (CERN) ; Alemany-Fernández, Reyes (CERN) ; Angoletta, Maria Elena (CERN) ; Antoniou, Fanouria (CERN) ; Argyropoulos, Theodoros (CERN) ; Asvesta, Foteini (CERN) ; Balhan, Bruno (CERN) ; Barnes, Michael (CERN) ; Barrientos, Diego (CERN) ; Bartosik, Hannes (CERN) ; Baudrenghien, Philippe (CERN) ; Bellodi, Giulia (CERN) ; Biancacci, Nicolo (CERN) ; Boccardi, Andrea (CERN) ; Borburgh, Jan (CERN) ; Bracco, Chiara (CERN) ; Carlier, Etienne (CERN) ; Cotte, Denis (CERN) ; Coupard, Julie (CERN) ; Damerau, Heiko (CERN) ; Di Giovanni, Gian Piero (CERN) ; Findlay, Alan (CERN) ; Fraser, Matthew (CERN) ; Funken, Anne (CERN) ; Goddard, Brennan (CERN) ; Hagmann, Gregoire (CERN) ; Hanke, Klaus (CERN) ; Huschauer, Alexander (CERN) ; Jaussi, Michael (CERN) ; Karpov, Ivan (CERN) ; Koevener, Toke (CERN) ; Küchler, Detlef (CERN) ; Lallement, Jean-Baptiste (CERN) ; Lasheen, Alexandre (CERN) ; Levens, Thomas (CERN) ; Li, Kevin (CERN) ; Lombardi, Alessandra (CERN) ; Madysa, Nico (CERN) ; Mahner, Edgar (CERN) ; Meddahi, Malika (CERN) ; Mether, Lotta (CERN) ; Mikulec, Bettina (CERN) ; Molendijk, John (CERN) ; Montesinos, Eric (CERN) ; Nisbet, David (CERN) ; Nuiry, Francois-Xavier (CERN) ; Papotti, Giulia (CERN) ; Paraschou, Konstantinos (CERN) ; Pedrosa, Fernando (CERN) ; Prebibaj, Tirsi (CERN) ; Prodon, Sylvie (CERN) ; Quartullo, Danilo (CERN) ; Renner, Elisabeth (CERN) ; Roncarolo, Federico (CERN) ; Rumolo, Giovanni (CERN) ; Salvant, Benoit (CERN) ; Schenk, Michael (CERN) ; Scrivens, Richard (CERN) ; Shaposhnikova, Elena (CERN) ; Skowroński, Piotr (CERN) ; Spierer, Arthur (CERN) ; Tecker, Frank (CERN) ; Valuch, Daniel (CERN) ; Velotti, Francesco (CERN) ; Wegner, Rolf (CERN) ; Zannini, Carlo (CERN)
Publication	2022
Number of pages	6
In:	JACoW IPAC 2022 (2022) 1610-1615
In:	13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1610-1615
DOI	10.18429/JACoW-IPAC2022-WEIYGD1
Subject category	Accelerators and Storage Rings
Project	CERN HL-LHC
Abstract	To provide HL-LHC performance, the CERN LHC injector chain underwent a major upgrade during an almost 2-year-long shutdown. In the first half of 2021 the injectors were gradually re-started with the aim to reach at least pre-shutdown parameters for LHC as well as for fixed target beams. The strategy of the commissioning across the complex, a summary of the many challenges and finally the achievements will be presented. Several lessons were learned and have been integrated to define the strategy for the performance ramp-up over the coming years. Remaining limitations and prospects for LHC beam parameters at the exit of the LHC injector chain in the years to come will be discussed. Finally, the emerging need for improved operability of the CERN complex will be addressed, with a description of the first efforts to meet the availability and flexibility requirements of the HL-LHC era while at the same time maximizing fixed target physics output.
Copyright/License	CC-BY-3.0

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