2021-05-29
09:01 |
Proton irradiation effects in Molybdenum-Carbide-Graphite composites
/ Simos, N (Brookhaven) ; Charitonidis, N (CERN) ; Simon, P (CERN) ; Whitaker, M (Brookhaven ; YITP, Stony Brook) ; Zhong, H (YITP, Stony Brook) ; Ghose, S (Brookhaven) ; Zhong, Z (Brookhaven) ; Quaranta, E (CERN) ; Guardia-Valenzuela, J (CERN) ; Accettura, C (CERN ; Milan Polytechnic) et al.
The High Luminosity upgrade of the Large Hadron Collider (HL-LHC) has prompted the investigation of novel materials for beam-intercepting devices, and in particular for the collimators responsible for protecting the machine from beam losses. The HL-LHC collimation system will inevitably experience increased levels of radiation damage and undergo changes in their crucial physio-mechanical properties. [...]
2021 - 14 p.
- Published in : J. Nucl. Mater. 553 (2021) 153049
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2021-05-29
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Progress in the Development of the Nb$_3$Sn MQXFB Quadrupole for the HiLumi Upgrade of the LHC
/ Izquierdo Bermudez, Susana (CERN) ; Ambrosio, Giorgio (Fermilab) ; Apollinari, Giorgio (Fermilab) ; Bajko, Marta (CERN) ; Bordini, Bernardo (CERN) ; Bourcey, Nicolas (CERN) ; Duarte Ramos, Delio (CERN) ; Ferracin, Paolo (LBL, Berkeley) ; Fiscarelli, Lucio (CERN) ; Feher, Sandor (Fermilab) et al.
The high-luminosity upgrade of the Large Hadron Collider (HL-LHC) requires new high field and large-aperture quadrupole magnets for the low-beta inner triplets (MQXF). With a nominal operating gradient of 132.2 T/m in a 150 mm aperture and a conductor peak field of 11.3 T, the new quadrupole magnets are based on Nb3Sn superconducting technology. [...]
FERMILAB-PUB-21-126-TD.-
2021 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4002007
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2021-05-29
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Study of the Heater-Coil Electrical Insulation for the HL-LHC Low Beta Quadrupoles
/ Marinozzi, Vittorio (Fermilab) ; Ambrosio, Giorgio (Fermilab) ; Baldini, Maria (Fermilab) ; Izquierdo Bermudez, Susana (CERN) ; Ferracin, Paolo (LBL, Berkeley) ; Krave, Steven (Fermilab) ; Muratore, Joseph (BNL, NSLS) ; Nobrega, Alfred (Fermilab) ; Parker, Marcellus (Fermilab) ; Todesco, Ezio (CERN) et al.
In the framework of the HL-LHC project, the present LHC low-β superconducting quadrupoles will be substituted with higher performance Nb3Sn magnets (MQXF) with 11.4 T coil peak field. MQXF coils are impregnated with epoxy resin to reduce risk of stress concentration on the brittle conductor. [...]
2021 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4001705
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2021-05-29
09:01 |
Completion of the Test Phase for the Hilumi LHC Skew Quadrupole Corrector Magnet
/ Prioli, M (LASA, Segrate) ; Broggi, F (LASA, Segrate) ; Campaniello, M (SAES Getters, Milan) ; Canetti, M (Rial Vacuum, Parma) ; Matteis, E De (LASA, Segrate) ; Gangini, F (Rial Vacuum, Parma) ; Imeri, L (LASA, Segrate) ; Leone, A (LASA, Segrate) ; Manini, P (SAES Getters, Milan) ; Mariotto, S (LASA, Segrate) et al.
In the family of the High-Luminosity LHC high order correctors, the skew quadrupole was the most critical magnet as three assemblies with different solutions were needed to meet the design specifications. This paper summarizes the prototyping phase of the magnet, discussing the observed nonconformities, the subsequent root cause analyses, and the adopted solutions. [...]
2021 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4001205
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2021-05-29
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2021-05-29
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Powering Performance and Endurance Beyond Design Limits of HL-LHC Low-Beta Quadrupole Model Magnets
/ Mangiarotti, Franco J (CERN) ; Ferradas Troitino, Salvador (CERN) ; Duda, Michal (Cracow, INP) ; Bajko, Marta (CERN) ; Bottura, Luca (CERN) ; Desbiolles, Vincent (CERN) ; Elekes, Gyopar (Babes-Bolyai U.) ; Ferradas Troitino, Jose (METROLAB, Geneva ; CERN) ; Feuvrier, Jerome (CERN) ; Ferracin, Paolo (LBNL, Berkeley) et al.
For the High Luminosity Upgrade project (HL-LHC) of the CERN Large Hadron Collider (LHC), lower β* quadrupole magnets based on advanced Nb 3 Sn conductors will be installed on each side of the ATLAS and CMS interaction points. To quantify the endurance and technological limits of these magnets, beyond their maximum operational conditions, two short length model magnets have been extensively tested at the CERN SM18 test facility. [...]
2021 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4000805
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2021-05-29
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Assembly and Warm Magnetic Measurement of MQYYM: A 90 mm NbTi Quadrupole Magnet Option for HL-LHC
/ Perraud, S (IRFU, Saclay) ; Simon, D (IRFU, Saclay) ; Felice, H (IRFU, Saclay) ; Segreti, M (IRFU, Saclay) ; Madur, A (IRFU, Saclay) ; Rifflet, J M (IRFU, Saclay) ; Machado, R Correia (IRFU, Saclay) ; Godon, R (IRFU, Saclay) ; Bouziat, D (IRFU, Saclay) ; Naini, S Emami (CERN) et al.
In the framework of the HL-LHC project, a NbTi double aperture quadrupole magnet MQYY is being developed as an option to replace the LHC magnet MQY. This 90 mm double aperture cos-2θ quadrupole has an operating gradient of 120 T/m at 1.9 K. [...]
2021 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4000705
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2021-05-29
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Fabrication and Power Test of the Second MCBXFB Nested Orbit Corrector Prototype for HL-LHC
/ García-Matos, Jesús A (Madrid, CIEMAT ; Madrid, Polytechnic U.) ; Calero, Jesús (Madrid, CIEMAT) ; Domínguez, Manuel (Madrid, CIEMAT) ; Fernández, Alejandro (Madrid, CIEMAT) ; Gómez, Pablo (Madrid, CIEMAT) ; García-Tabarés, Luis (Madrid, CIEMAT) ; Martínez, Teresa (Madrid, CIEMAT) ; Jardim, Carla Martins (Madrid, CIEMAT) ; Munilla, Javier (Madrid, CIEMAT) ; Pardo, Jose A (Madrid, CIEMAT) et al.
The second prototype of the MCBXFB nested orbit corrector for the upgrade of the LHC has been manufactured at CIEMAT and assembled at CERN, in the framework of the HL-LHC project. This paper describes the changes introduced with respect to the first prototype in order to test some design improvements intended for the series magnets. [...]
2021 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4000605
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2021-05-29
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The Development of the Superconducting Dipoles D2 for the High Luminosity Upgrade of LHC
/ Caiffi, Barbara (INFN, Genoa) ; Bersani, Andrea (INFN, Genoa) ; Cereseto, Roberto R (INFN, Genoa) ; Fabbricatore, Pasquale (INFN, Genoa) ; Farinon, Stefania (INFN, Genoa) ; Fiscarelli, Lucio (CERN) ; Foussat, Arnaud (CERN) ; Levi, Filippo (U. Genoa) ; Mangiarotti, Franco (CERN) ; Pampaloni, Alessandra (INFN, Genoa) et al.
The recombination dipoles D2 (MBRD) for the luminosity upgrade of the Large Hadron Collider (LHC) are double aperture magnets to be placed on each side of ATLAS and CMS experiments, generating 4.5 T along a magnetic length of 7.78 m and a bore diameter of 105 mm. Its development plan foresees the construction of a short model 1.6 m long, followed by a prototype and by the series of 6 magnets. [...]
2021 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 1-5
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2021-05-29
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