CERN Accelerating science


Latest additions:
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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The HV DCS System for the New Small Wheel Upgrade of the ATLAS Experiment / Karentzos, Efstathios (Freiburg U.) /ATLAS Collaboration
The ATLAS muon spectrometer will exceed its design capabilities in the high background radiation as expected during the upcoming runs and at HL-LHC. In order to cope with the foreseen limitations, it was decided to replace the SW with a New SW (NSW) system, by combining two prototype detectors, the sTGC & and resistive Micromegas. [...]
2022 - 6 p. - Published in : JACoW ICALEPCS 2021 (2022) 115-120 Fulltext: PDF;
In : 18th International Conference on Accelerator and Large Experimental Physics Control Systems, Online, 18 - 22 Oct 2021, pp.115-120

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Identification of Critical Components in the Complex Technical Infrastructure of the Large Hadron Collider Using Relief Feature Ranking and Support Vector Machines / Shokry, Ahmed (Ec. Polytech., Palaiseau (main)) ; Baraldi, Piero (Milan, Polytech.) ; Castellano, Andrea (Milan, Polytech.) ; Serio, Luigi (CERN) ; Zio, Enrico (Milan, Polytech. ; U. PSL)
This work proposes a data-driven methodology for identifying critical components in Complex Technical Infrastructures (CTIs), for which the functional logic and/or the system structure functions are not known due the CTI’s complexity and evolving nature. The methodology uses large amounts of CTI monitoring data acquired over long periods of time and under different operating conditions. [...]
2021 - 19 p. - Published in : Energies 14 (2021) 6000

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Optics Measurement and Correction Strategies for HL-LHC / Buffat, Xavier (CERN) ; Carlier, Felix Simon (CERN) ; Coello De Portugal - Martinez Vazquez, Jaime Maria ; De Maria, Riccardo (CERN) ; Dilly, Joschua Werner (Humboldt University of Berlin (DE)) ; Fol, Elena (CERN) ; Fuster Martinez, Nuria ; Gamba, Davide (CERN) ; Garcia Morales, Hector ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) et al.
The baseline strategy for optics commissioning in the HL-LHC era is presented and reviewed in detail, along with recent developments and unsolved matters in the linear and nonlinear optics measurement and correction techniques..
- 2022. - 102 p.

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Methods to optimize rare-event Monte Carlo reliability simulations for Large Hadron Collider Protection Systems / Blaszkiewicz, Milosz Robert
Machine Protection Systems of the Large Hadron Collider (LHC) are safety-critical systems that adhere to stringent reliability and availability requirements [...]
CERN-THESIS-2022-037 - 111 p.

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Magnetic measurements of MCBC and MCBY orbit correctors under special cycling conditions / Chmielinska, Agnieszka (CERN) ; Fiscarelli, Lucio (CERN) ; Todesco, Ezio (CERN) ; Kozanecki, Witold (Université Paris-Saclay (FR))
In the LHC, in addition to normal beam operation, the MCBC and MCBY orbit-corrector magnets are used for deflecting the beam during the van der Meer (vdM) scans used for calibrating the absolute luminosity scale. [...]
- 2022. - 28 p.
Full text

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Induction-Coil Measurement System for Normal- and Superconducting Solenoids / Petrone, Carlo (CERN) ; Sorti, Stefano (CERN) ; Dalane, Eivind (CERN) ; Mehl, Bertrand (CERN) ; Russenschuck, Stephan (CERN)
The magnetic measurement of solenoids relies on different methods to characterize the field quality and locate the magnetic axis. Usually, Hall mappers and stretched-wire systems are used for these tasks. [...]
2022 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 32 (2022) 9000605 Fulltext: PDF;

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Assembly and Pre-Loading Specifications for the Series Production of the Nb$_3$Sn MQXFA Quadrupole Magnets for the HL-LHC / Ferracin, P (LBL, Berkeley) ; Ambrosio, G (Fermilab) ; Cheng, D W (LBL, Berkeley) ; Ferradas Troitino, J (CERN) ; Garcia Fajardo, L (LBL, Berkeley) ; Izquierdo Bermudez, S (CERN) ; Prestemon, S (LBL, Berkeley) ; Ray, K L (LBL, Berkeley) ; Solis, M J (LBL, Berkeley) ; Todesco, E (CERN) et al.
The High Luminosity LHC (HL-LHC) Project is planning to install 16 cold-masses made with Nb3Sn quadrupole magnets in the LHC Interaction Regions to significantly increase its luminosity. Half of these cold masses are fabricated at BNL, FNAL, and LBNL under the US Accelerator Research Program (AUP). [...]
2022 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4000306

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Power Test of the First Two HL-LHC Insertion Quadrupole Magnets Built at CERN / Mangiarotti, F J (CERN) ; Willering, G (CERN) ; Fiscarelli, L (CERN) ; Bajko, M (CERN) ; Bottura, L (CERN) ; Desbiolles, V (CERN) ; Devred, A (CERN) ; Ferradas Troitino, J (CERN) ; Izquierdo Bermudez, S (CERN) ; Keijzer, R (CERN ; Twente U., Enschede) et al.
The High-Luminosity project (HL-LHC) of the CERN Large Hadron Collider (LHC), requires low β* quadrupole magnets in Nb$_3$Sn technology that will be installed on each side of the ATLAS and CMS experiments. After a successful shortmodel magnet manufacture and test campaign, the project has advanced with the production, assembly, and test of full-size 7.15- m-long magnets. [...]
2022 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 32 (2022) 1-5 Fulltext: PDF;

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Conceptual Design of the HL-LHC Hollow Electron Lens Superconducting Magnet System / Foussat, Arnaud (CERN) ; Bragin, Alexey (Novosibirsk, IYF) ; Ferlin, Gerard (CERN) ; Kirby, Glyn (CERN) ; Kolehmainen, Antti (CERN) ; Nikiforov, Danila (Novosibirsk, IYF) ; Pavliuchenko, Vadim (Novosibirsk, IYF) ; Perini, Diego (CERN) ; Petrone, Carlo (CERN) ; Redaelli, Stefano (CERN) et al.
The Hollow Electron Lens (HEL) units are part of the upgrade baseline of the High-Luminosity LHC accelerator (HL-LHC) and will be installed in the machine ring at point P4 on each counter-rotating LHC proton beamline during a long shutdown in 2025-2027 at CERN. The main goal is to improve the collimation system performance by controlling beam energy loss in the beam halo. [...]
2022 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4100905

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Focus on:
High Luminosity Large Hadron Collider (HL-LHC) (1,003)
FP7 HiLumi LHC Design Study (264)