CERN Accelerating science

Article
Report number	FERMILAB-PUB-22-861-TD
Title	Status and challenges of the interaction region magnets for HL-LHC
Author(s)	Todesco, E (CERN) ; Izquierdo Bermudez, S (CERN) ; Foussat, A (CERN) ; Gautheron, E (CERN) ; Kirby, G (CERN) ; Felice, H (CERN) ; Perez, J C (CERN) ; Fleiter, J (CERN) ; Barth, C (CERN) ; Milanese, A (CERN) ; Prin, H (CERN) ; Lusa, N (CERN) ; Ferradas Troitino, J (CERN) ; Ferradas Troitino, S (CERN) ; Mangiarotti, F (CERN) ; Principe, R (CERN) ; Willering, G (CERN) ; Duarte Ramos, D (CERN) ; Ballarino, A (CERN) ; Russenschuck, S (CERN) ; Devred, A (CERN) ; Bednarek, M (CERN) ; Rodriguez-Mateos, F (CERN) ; Statera, M (LASA, Segrate) ; Prioli, M (LASA, Segrate) ; Sorbi, M (LASA, Segrate) ; Mariotto, S (LASA, Segrate) ; Farinon, S (INFN, Genoa) ; Bersani, A (INFN, Genoa) ; Caiffi, B (INFN, Genoa) ; Fabbricatore, P (INFN, Genoa) ; Levi, F (INFN, Genoa) ; Pampaloni, A (INFN, Genoa) ; Toral, F (Madrid, CIEMAT) ; Martins, C (Madrid, CIEMAT) ; Matos, J Garcia (Madrid, CIEMAT) ; Nakamoto, T (KEK, Tsukuba) ; Sugano, M (KEK, Tsukuba) ; Suzuki, K (KEK, Tsukuba) ; Xu, Q (Beijing, Inst. High Energy Phys.) ; Wang, Y (Beijing, Inst. High Energy Phys.) ; Wei, W (Lanzhou, Inst. Modern Phys.) ; Apollinari, G (Fermilab) ; Carcagno, R (Fermilab) ; Feher, S (Fermilab) ; Ambrosio, G (Fermilab) ; Baldini, M (Fermilab) ; Yu, M (Fermilab) ; Nobrega, A (Fermilab) ; Vouris, A (Fermilab) ; Chlachidze, G (Fermilab) ; Stoynev, S (Fermilab) ; Amm, K (RIKEN BNL) ; Schmalzle, J (RIKEN BNL) ; Anarella, M (RIKEN BNL) ; Muratore, J (RIKEN BNL) ; Yahia, A Ben (RIKEN BNL) ; Joshi, P (RIKEN BNL) ; Ferracin, P (LBL, Berkeley) ; Prestemon, S (LBL, Berkeley) ; Cheng, D (LBL, Berkeley) ; Strauss, T (LBL, Berkeley) ; Cooley, L (LBL, Berkeley)
Publication	2023
Imprint	2022
Number of pages	8
In:	IEEE Trans. Appl. Supercond. 33 (2023) 4001608
DOI	10.1109/TASC.2023.3244143
Subject category	Particle Physics - Theory
Accelerator/Facility, Experiment	CERN LHC
Project	CERN HL-LHC
Abstract	About one hundred magnets of six different types shall be installed in the High Luminosity LHC (HL-LHC) in the years 2026-2028 at CERN. The magnets design, construction and test are based on CERN collaborations with institutes and industrial partners in USA, Spain, Italy, Japan and China. Three types of correctors are based on Nb‒Ti technology and feature conductor peak fields in the 2 to 4 T range: for all of them the prototype phase has been successfully completed. The production is well advanced for the superferric correctors, and is starting for the canted cosine theta correctors and for the nested correctors. The separation and recombination Nb‒Ti dipoles D1 and D2, with a 4.5-6 T bore field range, are both in the prototype phase after the completion of the short model program. The most challenging magnet, the Nb3Sn quadrupole with conductor peak field above 11 T, is in the prototype phase at CERN and halfway through the production phase in the USA. In this paper we will give, for each type of magnet, an overview of the main achievements obtained so far and we will outline the technical points still needing validation from the prototype program.

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