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1.
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Beam coupling impedance of the main extraction kickers in the CERN PS
/ Neroni, M (CERN ; U. Rome La Sapienza (main)) ; Barnes, M J (CERN) ; Lasheen, A (CERN) ; Mostacci, A (U. Rome La Sapienza (main)) ; Popovic, B (Argonne) ; Vollinger, C (CERN)
In view of the High Luminosity (HL) upgrade of the LHC, thebeam intensity must be doubled in the injector chain. To performreliable beam dynamics simulations, the beam coupling impedance inthe injectors, such as the Proton Synchrotron (PS), must be followedclosely by including all contributing elements into the impedancemodel. [...]
2024 - 12 p.
- Published in : JINST 19 (2024) T08001
Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.T08001
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2.
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High voltage consolidation of the temperature measurement channels of the LHC superconducting current leads
/ Trikoupis, N (CERN) ; Casas-Cubillos, J (CERN) ; Bustamante, E (CERN)
Recurrent dielectric breakdowns on the cryogenics instrumentation during the CERN LHC Electrical Quality Assurance (ELQA) campaigns led to an investigation of their root causes. During the CERN Long Shutdown 2 (LS2), several weaknesses were identified like floating wires or cable screens, cabling non-conformities, connector assembly issues, and weakness of the electronic conditioning cards. [...]
2023 - 8 p.
- Published in : JINST 18 (2023) C02010
In : Topical Workshop on Electronics for Particle Physics 2022 (TWEPP 2022), Bergen, Norway, 19 - 23 Sep 2022, pp.C02010
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3.
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Radiation test of commercial of the shelf (COTS) optical transceivers in the frame of the beam position monitor (BPM) consolidation project for the Large Hadron Collider (LHC)
/ Marin, M Barros (CERN) ; Boccardi, A (CERN) ; Ozdogan, S Can (CERN) ; Danzeca, S (CERN) ; Ferraro, R (CERN) ; Scialdone, A (CERN)
The consolidation of the Large Hadron Collider (LHC) beam position monitor (BPM) requires the deployment of about 5000 single-mode radiation-tolerant optical transmitters, working at 10 Gbps during 20 years of operation. While the use of the custom devices being designed at CERN remains the baseline for the project, 8 commercial of the shelf (COTS) optical transceivers have been evaluated as an alternative. [...]
2024 - 9 p.
- Published in : JINST 19 (2024) C03040
Fulltext: PDF;
In : Topical Workshop on Electronics for Particle Physics 2023 (TWEPP 2023), Geremeas, Sardinia, Italy, 1 - 6 Oct 2023, pp.C03040
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4.
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Impact of beam-coupling impedance on the Schottky spectrum of bunched beam
/ Lannoy, C (CERN ; LPHE, Lausanne) ; Lasocha, K (CERN) ; Pieloni, T (LPHE, Lausanne) ; Alves, D (CERN) ; Mounet, N (CERN)
The Schottky monitors of the Large Hadron Collider (LHC) canbe used for non-invasive beam diagnostics to estimate various bunchcharacteristics, such as tune, chromaticity, bunch profile orsynchrotron frequency distribution. However, collective effects, inparticular beam-coupling impedance, can significantly affectSchottky spectra when large bunch charges are involved. [...]
2024 - 21 p.
- Published in : JINST 19 (2024) P03017
Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.P03017
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Quench Protection of the HL-LHC Hollow Electron Lens Superconducting Solenoid Magnets
/ Wozniak, Mariusz (CERN) ; Foussat, Arnaud (CERN) ; Yammine, Samer (CERN) ; Steckert, Jens (CERN) ; Ravaioli, Emmanuele (CERN) ; Verweij, Arjan (CERN) ; Kolehmainen, Antti (CERN) ; Redaelli, Stefano (CERN) ; Rossi, Adriana (CERN)
The High-Luminosity LHC (HL-LHC) project is an upgrade of the Large Hadron Collider (LHC) and comprises the installation of two Hollow Electron Lens (HEL) systems, each acting on one beam on both sides of LHC Point 4. The systems aim for a controlled depletion of hadron beam tails and an enhanced hadron beam halo collimation. [...]
2022 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4701205
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.4701205
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8.
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The Separation-Recombination Dipole MBRD for the High-Luminosity LHC: From Prototype to Series
/ Levi, F (INFN, Genoa ; Genoa U.) ; Bersani, A (INFN, Genoa) ; Caiffi, B (INFN, Genoa) ; Cereseto, R (INFN, Genoa) ; Fabbricatore, P (INFN, Genoa) ; Farinon, S (INFN, Genoa) ; Foussat, A (CERN) ; Lonardo, F (Milan, Polytech.) ; Pampaloni, A (INFN, Genoa) ; Todesco, E (CERN)
The next upgrade for the Large Hadron Collider (LHC), called High-Luminosity LHC, has the aim of increasing the rate of collisions of the accelerator by a factor of ten. To achieve this goal, the dipole and quadrupole magnets before and after the interaction region of the ATLAS and CMS experiments will be replaced. [...]
2022 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4003905
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.4003905
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9.
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Magnetic Measurements Results and Analysis of the First Batches of Superferric Magnets for the HL-LHC High Order Field Correction
/ Matteis, E De (LASA, Segrate ; Milan U.) ; Mariotto, S (LASA, Segrate ; Milan U. ; INFN, Milan) ; Broggi, F (LASA, Segrate ; Milan U.) ; Paccalini, A (LASA, Segrate ; Milan U.) ; Palmisano, A (LASA, Segrate ; Milan U.) ; Pasini, A (LASA, Segrate ; Milan U.) ; Pedrini, D (LASA, Segrate ; Milan U.) ; Prioli, M (LASA, Segrate ; Milan U.) ; Rossi, L (LASA, Segrate ; Milan U.) ; Sorbi, M (LASA, Segrate ; Milan U. ; INFN, Milan) et al.
In agreement with CERN the LASA laboratory of INFN (National Institute for Nuclear Physics) of Milan has carried out the industrial development of a novel type of magnet, for the High Order (HO) correctors of the High Luminosity - LHC (HL-LHC) project. These corrector magnets are based on a superferric design and will be installed in the new HL-LHC insertion regions for the ATLAS and CMS Experiments at CERN. [...]
2022 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4004905
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.4004905
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10.
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Numerical Assessment of the Inhomogeneous Temperature Field and the Quality of Heat Extraction of Nb3Sn Impregnated Magnets for the High Luminosity Upgrade of the LHC
/ de Sousa, Patricia Borges (CERN) ; Puthran, Kirtana (CERN ; KIT, Karlsruhe) ; Sabaté-Gilarte, Marta (CERN) ; Cerutti, Francesco (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Todesco, Ezio (CERN) ; van Weelderen, Rob (CERN)
The High Luminosity upgrade of the Large Hadron Collider (HL-LHC) at CERN foresees the installation of Nb3Sn-based quadrupole magnets at selected interaction points of the accelerator. The precise knowledge of each magnet's thermal characteristics and heat extraction performance in response to power depositions during both nominal and ultimate conditions is essential in determining safe operating margins. [...]
2023 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4000705
In : Applied Superconductivity Conference, Honolulu, Hawaii, United States, 23 - 28 Oct 2022
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