CERN Accelerating science

HL-LHC Papers

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2023-05-04
06:01
Numerical Assessment of the Inhomogeneous Temperature Field and the Quality of Heat Extraction of Nb3Sn Impregnated Magnets for the High Luminosity Upgrade of the LHC / de Sousa, Patricia Borges (CERN) ; Puthran, Kirtana (CERN ; KIT, Karlsruhe) ; Sabaté-Gilarte, Marta (CERN) ; Cerutti, Francesco (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Todesco, Ezio (CERN) ; van Weelderen, Rob (CERN)
The High Luminosity upgrade of the Large Hadron Collider (HL-LHC) at CERN foresees the installation of Nb3Sn-based quadrupole magnets at selected interaction points of the accelerator. The precise knowledge of each magnet's thermal characteristics and heat extraction performance in response to power depositions during both nominal and ultimate conditions is essential in determining safe operating margins. [...]
2023 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4000705

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2023-05-04
06:01
Development, Construction, and Commissioning of a Fully Automated Cabling Machine for Round Multi-Layer REBCO Cables / Barth, C (CERN) ; Careil, M P (CERN) ; Zurita, A C (CERN) ; Fleiter, J (CERN) ; Ballarino, A (CERN)
High-current Superconducting Links are being developed at CERN for the powering of the superconducting magnets of the LHC High Luminosity upgrade (HL-LHC). The Superconducting Links consist of an assembly of magnesium-diboride (MgB2) cables powering different magnet circuits. [...]
2023 - 7 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4801707

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2023-05-04
06:01
First Short Orbit Nested Corrector Magnet for HL-LHC Produced in the Industry / Jardim, C Martins (Madrid, CIEMAT ; Madrid, Escuela Tec. Sup. Ing. Ind.) ; Alcázar, C (Madrid, CIEMAT) ; Domínguez, M A (Madrid, CIEMAT) ; Durán, O (Madrid, CIEMAT) ; Estévez, A (Madrid, CIEMAT) ; García-Matos, J A (Madrid, CIEMAT ; GIFT, Spain) ; García-Tabarés, L (Madrid, CIEMAT) ; González, L (Madrid, CIEMAT) ; Gómez, P (Madrid, CIEMAT) ; Jiménez, J (Madrid, CIEMAT) et al.
MCBXF magnets are nested orbit combined correctors for the upgrade of the LHC. Two prototypes and the first series magnet were manufactured at CIEMAT and assembled at CERN, in the framework of the HL-LHC project. [...]
2023 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4000505

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2023-05-04
06:01
Protection Scheme Effectiveness Study for the High-Luminosity LHC MBRD Magnet / Caiffi, Barbara (INFN, Genoa) ; Bender, Lennard (Hochschule, Eng. Econ., Karlsruhe) ; Bersani, Andrea (INFN, Genoa) ; Farinon, Stefania (INFN, Genoa) ; Foussat, Arnaud (CERN) ; Levi, Filippo (INFN, Genoa) ; Mangiarotti, Franco (CERN) ; Musenich, Riccardo (INFN, Genoa) ; Novelli, Daniel (INFN, Genoa) ; Pampaloni, Alessandra (INFN, Genoa) et al.
The MBRD (Main Bending Recombination Dipole, or D2) is one of the magnets in the interaction region of the LHC that needs to be replaced in order to fulfill the requirements of the High-Luminosity upgrade. The magnetic field must be increased up to 4.5 T in an aperture with a diameter of 105 mm and a total length of about 8 m, to reach the target integrated field of 35 T$\cdot$m. [...]
2023 - 4 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4701304

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2023-05-04
06:01
Design and Fabrication of a Canted-Cosine-Theta Double Aperture Orbit Corrector Dipole for the LHC / Pepitone, K (Uppsala U.) ; Kirby, G (CERN) ; Olvegård, M (Uppsala U.) ; Ahl, A (Scanditronix Instrument, Uppsala) ; Almström, M (Linnaeus U.) ; Dugic, I (Linnaeus U.) ; Emilsson, F (AMACC, Uppsala) ; Haralanova, V (Linnaeus U.) ; Johansson, M (Unlisted, SE) ; Karlsson, G (Linnaeus U.) et al.
A prototype CCT dipole magnet developed by a collaboration between Swedish universities, Swedish industry and CERN will be tested at Uppsala University. This 1 m long double-aperture magnet can provide a field strength of 3.3 T at 85 A in a 70 mm aperture with an integrated field of 2.8 Tm. [...]
2023 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4000405

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2023-05-04
06:00
First Prototype of the Long Orbit Nested Corrector for HL-LHC / Toral, F (Madrid, CIEMAT ; Madrid, Escuela Tec. Sup. Ing. Ind.) ; Alcázar, C (Madrid, CIEMAT) ; Domínguez, M (Madrid, CIEMAT) ; Durán, O (Madrid, CIEMAT) ; Estévez, A (Madrid, CIEMAT) ; García-Matos, J A (Madrid, CIEMAT ; GIFT, Spain) ; García-Tabarés, L (Madrid, CIEMAT) ; González, L A (Madrid, CIEMAT) ; Gómez, P (Madrid, CIEMAT) ; Jiménez, J (Madrid, CIEMAT) et al.
2.5-m-long nested orbit correctors (so-called MCBXFA) are necessary for the upgrade of LHC, in the framework of HL-LHC project. These magnets provide 2.1 T in vertical and horizontal direction and they share the same cross-section of their shorter version MCBXFB, for which two prototypes and the first two series magnets have been manufactured and tested. [...]
2023 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4001105

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2023-04-22
07:32
Fabrication of the Fermilab Pre-Series Cold Mass for the HL-LHC Accelerator Upgrade Project / Vouris, A (Fermilab) ; Bossert, R (Fermilab) ; DiMarco, J (Fermilab) ; Feher, S (Fermilab) ; Martin, L (Fermilab) ; Strauss, T (Fermilab) ; Wilson, C (Fermilab) ; Prin, H (CERN) ; Todesco, E (CERN)
Fermilab is fabricating ten full length cold masses for the high-luminosity Large Hadron Collider Accelerator Upgrade Project (HL-LHC AUP). One practice assembly and one pre-series assembly have been completed. [...]
FERMILAB-PUB-22-841-TD.- 2023 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 1-5

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2023-04-22
07:32
Long term stability studies in the presence of crab cavities and high order multipoles in the CERN super proton synchrotron and high luminosity large hadron collider / Alekou, A (CERN ; Manchester U.) ; Appleby, R B (Manchester U.) ; Cruz-Alaniz, E (CERN ; U. Liverpool (main)) ; Bartosik, H (CERN) ; Carlà, M (CERN) ; Kostoglou, S (CERN) ; Papaphilippou, Y (CERN)
In 2018 the world’s first Crab Cavity (CC) experiments with protons were successfully performed, aiming to study the CC effect on a proton beam and evaluate the engineering challenges. Before the commencement of these experiments, the impact of the CCs and their multipoles on the long term particle stability of the SPS was studied using dynamic aperture simulations. [...]
2023 - 15 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1050 (2023) 168178 Fulltext: PDF;

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2023-03-31
05:22
Analysis of the Mechanical Performance of the 4.2-m-Long MQXFA Magnets for the Hi-Lumi LHC Upgrade / Garcia Fajardo, L. (LBL, Berkeley) ; Ambrosio, G. (Fermilab) ; Yahia, A. Ben (Brookhaven) ; Cheng, D.W. (LBL, Berkeley) ; Ferracin, P. (LBL, Berkeley) ; Ferradas Troitino, J. (CERN) ; Izquierdo Bermudez, S. (CERN) ; Muratore, J. (Brookhaven) ; Prestemon, S. (LBL, Berkeley) ; Ray, K.L. (LBL, Berkeley) et al.
Under the U.S. High Luminosity LHC Accelerator Upgrade Project (HL-LHC AUP), the 150 mm bore, high-field Nb3Sn low-{̱e̱ṯa̱}̱ MQXFA quadrupole magnets are being fabricated, assembled and tested, in the context of the CERN Hi-Luminosity LHC (HL-LHC) upgrade. [...]
arXiv:2303.16795; FERMILAB-PUB-23-116-TD.- 2023-08 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4003205 Fulltext: 2303.16795 - PDF; 4b8cc3a91b35c5867bfac57ac156409a - PDF; External link: Fermilab Library Server

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2023-03-25
06:30
A Novel Design for Improving the Control on the Stainless-Steel Vessel Welding Process for Superconducting Magnets / Vallone, G (LBL, Berkeley) ; Ambrosio, G (Fermilab) ; Anderssen, E (LBL, Berkeley) ; Fehrer, S (Fermilab) ; Ferracin, P (LBL, Berkeley) ; Ferradas Troitino, J (CERN)
Stainless steel vessels see widespread use in superconducting magnets for particle accelerator applications. [...]
FERMILAB-PUB-22-858-TD.
- 2022. - 5 p.
Fermilab Library Server - Fulltext

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