CERN Accelerating science

Projects, Upgrade and Consolidation Projects

Ostatnio dodane:
2021-07-20
18:28
Mechanical Behavior of the Shielded HL-LHC Beam Screen during a Magnet Quench / Morrone, Marco (CERN) ; Garion, Cedric (CERN) ; Chiggiato, Paolo (CERN) ; Sacristan De Frutos, Oscar ; Guinchard, Michael (CERN) ; Fiscarelli, Lucio (CERN)
In the framework of the High-Luminosity Large Hadron Collider (HL-LHC) project, larger and shielded beam screens will be installed in the beam pipe of the superconducting magnets of the insertion next to the ATLAS and CMS detectors. The beam screen is a complex assembly that guarantees the vacuum requirements while shielding the magnet cold mass from the induced heat loads. [...]
CERN-ACC-2021-0005.- Geneva : CERN, 2021 - 24 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 9000616 Fulltext: PDF;

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2021-06-24
06:16
Development and Coil Fabrication for the LARP 3.7-m Long Nb3Sn Quadrupole / LARP Collaboration
The U.S. LHC Accelerator Research Program (LARP) has started the fabrication of 3.7-m long Nb$_3$Sn quadrupole models. [...]
FERMILAB-PUB-08-459-TD.- 2009 - 4 p. - Published in : IEEE Trans. Appl. Supercond. 19 (2009) 1231-1234 Fulltext: PDF; External link: Fermilab Library Server (fulltext available)
In : Applied Superconductivity Conference 2008, Chicago, IL, USA, 17 - 22 Aug 2008, pp.1231-1234

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2021-06-23
06:01
Development and test of LARP technological quadrupole (TQC) magnet / Feher, S (Fermilab) ; Bossert, R C (Fermilab) ; Ambrosio, G (Fermilab) ; Andreev, N (Fermilab) ; Barzi, E (Fermilab) ; Carcagno, R (Fermilab) ; Kashikhin, V S (Fermilab) ; Kashikhin, V V (Fermilab) ; Lamm, M J (Fermilab) ; Nobrega, F (Fermilab) et al.
In support of the development of a large-aperture superconducting quadrupole for the Large Hadron Collider (LHC) luminosity upgrade, two-layer quadrupole models (TQC and TQS) with 90 mm aperture are being constructed at Fermilab and LBNL within the framework of the US LHC Accelerator Research Program (LARP). This paper describes the construction and test of model TQC01. [...]
FERMILAB-PUB-06-296-TD.- 2007 - 4 p. - Published in : IEEE Trans. Appl. Supercond. 17 (2007) 1126-1129
Fulltext: PDF; External link: Fermilab Library Server (fulltext available)
In : Applied Superconductivity Conference, Seattle, WA, USA, 27 Aug - 1 Sep 2006, pp.1126-1129

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2021-06-18
06:16
First demonstration of the use of crab cavities on hadron beams / Calaga, R (CERN) ; Alekou, A (Manchester U.) ; Antoniou, F (CERN) ; Appleby, R B (Manchester U.) ; Arnaudon, L (CERN) ; Artoos, K (CERN) ; Arduini, G (CERN) ; Baglin, V (CERN) ; Barriere, S (CERN) ; Bartosik, H (CERN) et al.
Many future particle colliders require beam crabbing to recover geometric luminosity loss from the nonzero crossing angle at the interaction point (IP). A first demonstration experiment of crabbing with hadron beams was successfully carried out with high energy protons. [...]
2021 - 6 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 062001 Fulltext: PDF;

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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
09:01
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 Fulltext: PDF;

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2021-05-29
09:01
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
09:01
Analysis of Geometry and Field Quality Along the Series Production of the 11 T Dipole for the High Luminosity LHC / Pulikowski, Dariusz (CERN) ; Devred, Arnaud (CERN) ; Fiscarelli, Lucio (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Fernandez, Jose Luis Rudeiros (CERN) ; Savary, Frederic (CERN) ; Succi, Giovanni (CERN)
The first series production of Nb3Sn Accelerator Magnets is approaching its end. The LHC dipole upgrade within the scope of the High Luminosity project consists of collared assemblies of 5.6 m-long coils targeted for a nominal field of 11 T at 11.85 kA and 60 mm aperture. [...]
2021 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4001006

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2021-05-29
09:01
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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High Luminosity Large Hadron Collider (HL-LHC) (912)
HiLumi LHC (264)