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1.
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Status of CLIC Magnets Studies and R
/ Modena, Michele (CERN) ; Aloev, Alexander (CERN) ; Solodko, Evgeny (CERN) ; Thonet, Pierre-Alexandre (CERN) ; Vorozhtsov, Alexey (CERN)
Since 2009 the CERN Magnet Group (CERN-TE-MSC) started R&D; activities in order to focalize the most challenging and interesting cases to be studied among the magnets needed for CLIC the Compact Linear Collider. In the last four years several theoretic studies, models and prototypes were realized mainly in two domains: magnets for the Modules, the modular elements that are composing the backbone of the two-beam linac structure of CLIC, and the Machine Detector Interface (MDI) including the Final Focus elements, and the anti-solenoid. [...]
2014 - 4 p.
- Published in : 10.18429/JACoW-IPAC2014-TUPME007
Fulltext: PDF; External link: Full-text at JACoW Server
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.TUPME007
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2.
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Experimental Program of the HL-LHC Inner Triplet String Test at CERN
/ Yammine, S (CERN) ; Bajko, M (CERN) ; Ballarino, A (CERN) ; Bednarek, M J (CERN) ; Bozzini, D (CERN) ; Blanchard, S (CERN) ; Brüning, O (CERN) ; Cruikshank, P (CERN) ; Denz, R (CERN) ; Ramos, D Duarte (CERN) et al.
This contribution describes the experimental program already undergoing and to be completed on the High Luminosity Large Hadron Collider (HL-LHC) Inner Triplet (IT) String, an important intermediate milestone of the HL-LHC project at CERN. First, it describes the magnet circuits of the HL-LHC IT String. [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4001505
Fulltext: PDF;
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3.
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The high luminosity Large Hadron Collider project: from project to reality at CERN
/ Cantalapiedra, G Aparicio (CERN) ; Oliveira, J (CERN) ; Corso, J P (CERN) ; Fessia, P (CERN) ; Maridor, S (CERN) ; Modena, M (CERN)
The High Luminosity Large Hadron Collider (HL-LHC) project is an upgrade of the LHC aiming to increase by a factor 10 the harvested integrated luminosity foreseen early 40s. During Long Shutdown 3, scheduled to begin at the end of 2025, nearly 1.2 km of accelerator components, including a range of services spread across surface and underground facilities, will be replaced with new equipment deploying innovative key technologies. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) WEPM124
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPM124
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4.
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5.
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Project management structures, processes, and tools for the HL-LHC project
/ Vandoni, Giovanna (CERN) ; Brüning, Oliver (CERN) ; Di Girolamo, Beniamino (CERN) ; Fessia, Paolo (CERN) ; Garcia Gavela, Hector (CERN) ; Jensen, Lars (CERN) ; Modena, Michele (CERN) ; Noels, Cecile (CERN) ; Tavian, Laurent (CERN) ; Zerlauth, Markus (CERN)
At its restart after a major shutdown in 2029, the LHC will see its interaction regions upgraded by the installation of the HL-LHC equipment, with new Nb3Sn triplets and cold powering system, crab-cavities for crossing angle compensation and luminosity levelling, an upgraded collimation system, and fully remote alignment for the final focusing region. In the following operational runs, the LHC will aim at a tenfold increase of the integrated luminosity compared to the original design. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) TUPA154
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.TUPA154
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6.
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Observation of the $B^+ \rightarrow J/\psi \eta^{\prime} K^+$ decay
/ LHCb Collaboration
The $B^+ \rightarrow J/\psi \eta^{\prime} K^+$ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13TeV, corresponding to a total integrated luminosity of 9fb$^{-1}$. The branching fraction of this decay is measured relative to the known branching fraction of the $B^+ \rightarrow \psi(2S) K^+$ decays and found to be $$ \frac{\mathcal{B}( B^+ \rightarrow J/\psi \eta^{\prime}K^+)} {\mathcal{B}( B^+ \rightarrow \psi(2S)K^+) } = \left(4.91\pm 0.47\pm0.29\pm0.07\right)\times10^{-2}, $$ where the first uncertainty is statistical, the second is systematic and the third is related to external branching fractions. [...]
arXiv:2303.09443; LHCb-PAPER-2022-054; CERN-EP-2023-022.-
Geneva : CERN, 2023-08-25 - 19 p.
Fulltext: Publication - PDF; 2303.09443 - PDF; Erratum - PDF; Related data file(s): ZIP;
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7.
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The HL-LHC Project Gets Ready for Its Deployment
/ Zerlauth, Markus (CERN) ; Brüning, Oliver (CERN) ; Di Girolamo, Beniamino (CERN) ; Fessia, Paolo (CERN) ; Gaignant, Christelle (CERN) ; Garcia Gavela, Hector (CERN) ; Maclean, Ewen (CERN) ; Modena, Michele (CERN) ; Otto, Thomas (CERN) ; Tavian, Laurent (CERN) et al.
Following the successful completion of the second long shutdown (LS2), the Large Hadron Collider (LHC) is preparing for its final operational run before the majority of the High Luminosity Upgrade (HL-LHC) will be installed during the third Long Shutdown starting in 2026. The HL-LHC upgrade will enable a further tenfold increase in integrated luminosity delivered to the ATLAS and CMS experiments, starting by an upgrade of the machine protection, collimation and shielding systems in LS2, and followed by the deployment of novel key technologies, including Nb₃Sn based insertion region magnets, cold powering by MgB₂ superconducting links and integration of Nb crab-cavities to compensate the effects of a larger crossing angle. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 50-53
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.50-53
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Run3 Installation Coordination
/ Tock, Jean-Philippe (CERN) ; Bedel, Cyrille Patrick (CERN) ; Bernardini, Marzia (CERN) ; Etheridge, John Robert (CERN) ; Fessia, Paolo (CERN) ; Lambert, Anna (CERN) ; Loertscher, Yves (CERN) ; Masterson, Raoul (Ministere des affaires etrangeres et europeennes (FR)) ; Modena, Michele (CERN) ; Roesler, Stefan (CERN) et al.
After reminding the mandate and the scope of the Run3 Installation Coordinator, the Run3 team members and their respective assignments will be present-ed [...]
CERN-ACC-NOTE-2022-0037.
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2022. - 4 p.
Full text
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10.
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Observation of the doubly charmed baryon decay $ {\varXi}_{cc}^{++}\to {\varXi}_c^{\prime +}{\pi}^{+} $
/ LHCb Collaboration
The $\it{\Xi_{cc}^{++}\to \Xi_{c}^{'+}\pi^{+}}$ decay is observed using proton-proton collisions collected by the LHCb experiment at a centre-of-mass energy of $13\mathrm{\,Te\kern -0.1em V}$, corresponding to an integrated luminosity of $5.4\,\mathrm{fb}^{-1}$. The $\it{\Xi_{cc}^{++}\to \Xi_{c}^{'+}\pi^{+}}$ decay is reconstructed partially, where the photon from the $\it{\Xi_{c}^{'+} \to \Xi_{c}^{+}\gamma}$ decay is not reconstructed and the $pK^-\pi^+$ final state of the $\it{\Xi_{c}^{+}}$ baryon is employed. [...]
arXiv:2202.05648; LHCb-PAPER-2021-052; CERN-EP-2022-016.-
2022-05-06 - 19 p.
- Published in : JHEP 2205 (2022) 038
Fulltext: LHCb-PAPER-2021-052_to_arXiv_ - PDF; document - PDF; 2202.05648 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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