CERN Accelerating science

Projects, Upgrade and Consolidation Projects

Latest additions:
2022-07-15
07:51
Field Quality of the 4.5-m-Long MQXFA Pre-Series Magnets for the HL-LHC Upgrade as Observed During Magnet Assembly / Wang, X (LBL, Berkeley) ; Ambrosio, G (Fermilab) ; Yahia, A Ben (Brookhaven) ; Cheng, D W (LBL, Berkeley) ; DiMarco, J (Fermilab) ; Ferracin, P (LBL, Berkeley) ; Ghiorso, W (LBL, Berkeley) ; Izquierdo Bermudez, S (CERN) ; Myers, C (LBL, Berkeley) ; Pan, H (LBL, Berkeley) et al.
The U.S. High-Luminosity LHC Accelerator Upgrade Project (HL-LHC AUP) is developing MQXFA magnets, a series of 4.5 m long 150 mm aperture high-field Nb$_3$Sn quadrupole magnets for the HL-LHC upgrade at CERN. [...]
FERMILAB-PUB-22-524-TD.- 2022 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 32 (2022) 1-5

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2022-07-14
16:49
Prospects for beam-based study of dodecapole nonlinearities in the CERN High-Luminosity Large Hadron Collider / Maclean, Ewen Hamish (CERN) ; Carlier, Felix Simon (CERN) ; Dilly, Joschua Werner (Humboldt University of Berlin (DE)) ; Giovannozzi, Massimo (CERN) ; Tomas Garcia, Rogelio (CERN)
Nonlinear magnetic errors in low-β insertions can have a significant impact on the beam-dynamics of a collider such as the CERN Large Hadron Collider (LHC) and its luminosity upgrade (HL-LHC). [...]
CERN-ACC-NOTE-2022-0020.
- 2022. - 34 p.

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2022-07-14
06:23
On the effect of strand damage on the operating margin of a Nb$_3$Sn Rutherford cable / Succi, G (CERN) ; Bottura, L (CERN) ; Breschi, M (U. Bologna (main)) ; Bordini, B (CERN) ; Baffari, D (CERN)
Degradation of performance in superconducting magnets can be a major concern when a brittle material like Nb3Sn is employed. Indeed, degradation can significantly alter the transport properties of a cable if, e.g. [...]
2022 - 11 p. - Published in : Cryogenics 125 (2022) 103458 Fulltext: PDF;

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2022-07-01
13:40
Measurement of Excess Noise in Thin Film and Metal Foil Resistor Networks / Beev, Nikolai (CERN)
Low-frequency resistance fluctuations cause excess noise in biased resistors. The magnitude of these fluctuations varies significantly between different resistor types. [...]
CERN-ACC-2022-0010.- Geneva : CERN, 2022
In : 2022 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), Ottawa, Ca, 16 - 19 May 2022

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2022-07-01
13:34
A Metrology-grade Digitizer for Power Converters in the High Luminosity Large Hadron Collider / Beev, Nikolai (CERN) ; Cerqueira Bastos, Miguel (CERN) ; Martino, Michele (CERN) ; Valuch, Daniel (CERN)
The High Luminosity Large Hadron Collider project at CERN requires performance improvements in the precision powering of magnets, in particular for the new Nb3Sn based Inner Triplet magnets that provide the final focusing of the hadron beams at the interaction points of the ATLAS and CMS detectors. This work presents a new digitizer, the HPM7177, which is part of the signal chain for high precision measurements of magnet current..
CERN-ACC-2022-0009.- Geneva : CERN, 2022
In : 2022 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), Ottawa, Ca, 16 - 19 May 2022

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2022-06-12
06:06
Successful Crabbing of Proton Beams / Calaga, Rama (CERN) /HL-LHC Collaboration
Many future particle colliders require beam crabbing to recover the geometric luminosity loss from the non-zero crossing angle at the interaction point. A first demonstration experiment of crabbing with hadron beams was successfully carried out with high energy protons. [...]
Geneva : JACoW, 2021 - 6 p. - Published in : JACoW IPAC 2021 (2021) 2510-2515 Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.2510-2515

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2022-06-02
06:29
Quench Behavior of Prototype Nb-Ti HL-LHC Dipole Canted Cos-Theta Orbit Corrector Magnets / Wozniak, Mariusz (CERN) ; Ravaioli, Emmanuele (CERN) ; Mangiarotti, Franco (CERN) ; Mentink, Matthias (CERN) ; Kirby, Glyn (CERN) ; Verweij, Arjan (CERN) ; Xu, Qingjin (CAS, Beijing) ; Wu, Wei (CAS, Beijing)
The HL-LHC project is an upgrade of the LHC that requires double aperture dipole correctors. In 2015, CERN selected Canted Cos-Theta (CCT) magnet, and the development of the MCBRD magnets followed. [...]
2022 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 32 (2022) 1-5 Fulltext: PDF;

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2022-06-02
06:29
Mechanical and thermal design of the target neutral beam absorber for the High-Luminosity LHC upgrade / Santos Díaz, P (Natl. U. Sci. Tech., Moscow) ; Sanchez Galan, F (CERN) ; De Maria, R (CERN) ; Kepes, E (Unlisted, CZ) ; Steinberg, P (Brookhaven Natl. Lab.) ; Longo, R (Illinois U., Urbana) ; Mazzoni, S (CERN) ; Cerutti, F (CERN) ; Sabate Gilarte, M (Seville U.) ; Infantino, A (CERN) et al.
The High-Luminosity target neutral beam absorber (TAXN) is the radiation absorber of the neutral particle debris generated at the beam collisions carried out in the ATLAS and CMS detectors at the Large Hadron Collider (LHC). The new absorber will protect the superconducting magnets from this radiation to prevent their quenching at a design luminosity of 7.5×1034  cm−2 s−1. [...]
2022 - 17 p. - Published in : Phys. Rev. Accel. Beams 25 (2022) 053001 Fulltext: PDF;

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2022-06-02
06:29
Luminosity and physics considerations on HL-LHC–and HE-LHC–based $\mu$p colliders / Kaya, Umit (Unlisted, TR) ; Ketenoglu, Bora (Ankara U.) ; Sultansoy, Saleh (TOBB ETU, Ankara) ; Zimmermann, Frank (CERN)
Construction of the future muon collider tangential to the Large Hadron Collider will give opportunity to realize μp collisions at multi-TeV center-of-mass energies. Using the nominal parameters of high-luminosity and high-energy upgrades of the LHC, as well as the design parameters of muon colliders, it is shown that L $_{μp}$ of the order of 10$^{33}$ cm$^{−2}$s$^{−1}$ is achievable for different options with from 4.58 TeV to 12.7 TeV. [...]
2022 - 5 p. - Published in : EPL 138 (2022) 24002

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2022-05-17
20:50
Optimization of the High Order Correctors for HL-LHC Toward the Series Production / Statera, Marco (INFN, Milan) ; Alessandria, Franco (INFN, Milan ; Milan U.) ; Bellomo, Giovanni (INFN, Milan ; Milan U.) ; Broggi, Francesco (INFN, Milan) ; Imeri, Luca (INFN, Milan) ; Leone, Augusto (INFN, Milan) ; Mariotto, Samuele (INFN, Milan ; Milan U.) ; Paccalini, Antonio (INFN, Milan) ; Pasini, Alessandro (INFN, Milan) ; Pedrini, Danilo (INFN, Milan) et al.
INFN is developing at the LASA lab (Milano, Italy) the High Order (HO) corrector magnets for the High Luminosity-LHC (HL-LHC) project, which will equip the interaction regions. Five prototypes, from skew quadrupole to dodecapole, have been designed and tested at LASA. [...]
2021 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 1-5

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Focus on:
High Luminosity Large Hadron Collider (HL-LHC) (1,044)
FP7 HiLumi LHC Design Study (264)