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Emittance and luminosity monitoring and modelling for LHC Run 3
/ Efthymiopoulos, Ilias (CERN) ; Sterbini, Guido (CERN) ; Bartosik, Hannes (CERN) ; Kostoglou, Sofia (CERN)
A comprehensive model accurately depicts and tracks emittance and luminosity evolution in the Large Hadron Collider (LHC), considering known effects like IBS, synchrotron radiation damping, coupling and incorporating data-driven factors on emittance growth and intensity losses. Used extensively in LHC Run 2, the model is updated for compatibility with new optics and operational schemes in Run 3, featuring luminosity leveling. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPG28
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPG28
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2.
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Status of beam-beam studies for the high-luminosity LHC
/ Droin, Colas (CERN) ; Sterbini, Guido (CERN) ; Efthymiopoulos, Ilias (CERN) ; Mounet, Nicolas (CERN) ; De Maria, Riccardo (CERN) ; Tomas, Rogelio (CERN) ; Kostoglou, Sofia (CERN)
Optimizing the configuration of an operational cycle of a collider such as the LHC is a complex process, requiring various simulation studies. In particular, Dynamic Aperture (DA) simulations, based on particle tracking, serve as indispensable tools for achieving this goal. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) THPC77
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.THPC77
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3.
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4.
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Evolution of special LHC optics configurations Run 3 update
/ Efthymiopoulos, Ilias (CERN) ; Wegscheider, Andreas (CERN) ; Mirarchi, Daniele (CERN) ; Maclean, Ewen (CERN) ; Carlier, Felix (CERN) ; Van der Veken, Frederik (CERN) ; Dilly, Joschua (CERN) ; Le Garrec, Mael (CERN) ; D'Andrea, Marco (CERN ; INFN, Legnaro) ; Solfaroli, Matteo (CERN) et al.
The Large Hadron Collider (LHC) employs special optics and configurations, alongside low-beta* collision optics, to address specific experimental requirements. These include calibrating luminosity monitors (vdM) and facilitating forward physics measurements in TOTEM and ALFA experiments (high-beta). [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) MOPC16
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPC16
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5.
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Simulations and experiments for dynamic aperture studies in the LHC ion operation
/ Kostoglou, Sofia (CERN) ; Sterbini, Guido (CERN) ; Bartosik, Hannes (CERN) ; Efthymiopoulos, Ilias (CERN) ; Hostettler, Michi (CERN) ; Bruce, Roderik (CERN)
Dynamic Aperture (DA) studies, based on single-particle tracking simulations including important non-linear fields such as beam-beam effects, have played a crucial role in guiding the operation of the Large Hadron Collider (LHC) in proton-proton collisions. The correspondence between DA computed through simulations and the actual beam lifetime during operation has been established for proton beams through dedicated experiments at the LHC. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) MOPS06
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPS06
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6.
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Operational Scenario of First High Luminosity LHC Run
/ Tomás García, Rogelio (CERN) ; Arduini, Gianluigi (CERN) ; Baudrenghien, Philippe (CERN) ; Bruce, Roderik (CERN) ; Brüning, Oliver (CERN) ; Buffat, Xavier (CERN) ; Calaga, Rama (CERN) ; Cerutti, Francesco (CERN) ; De Maria, Riccardo (CERN) ; Dilly, Joschua (CERN) et al.
A new scenario for the first operational run of the HL-LHC era (Run 4) has been recently developed to accommodate a period of performance ramp-up to achieve an annual integrated luminosity close to the nominal HL-LHC design. The operational scenario in terms of beam parameters and machine settings, as well as the different phases, are described here along with the impact of potential delays on key hardware components..
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 1846-1849
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1846-1849
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7.
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Bunch Luminosity Variations in LHC Run 2
/ Efthymiopoulos, Ilias (CERN) ; Fartoukh, Stephane D (CERN) ; Iadarola, Giovanni (CERN) ; Karastathis, Nikolaos (CERN) ; Papadopoulou, Stefania (CERN) ; Papaphilippou, Yannis (CERN)
The LHC is designed to collide intense bunches of protons with tightly defined conditions, aimed to maximize the delivered recorded integrated luminosity to the experiments. One of these conditions is the maximum level of bunch-to-bunch fluctuation in the luminosity, in particular when levelling at maximum acceptable event rate at the experiments. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 4094-4097
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.4094-4097
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8.
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The Multi-Mega-Watt Target Station for the European Spallation Source Neutrino Super Beam
/ Baussan, Eric (Strasbourg, IPHC) ; Bouquerel, Elian (Strasbourg, IPHC) ; Cupial, Piotr (AGH-UST, Cracow) ; D'Alessi, Loris (Strasbourg, IPHC) ; Dracos, Marcos (Strasbourg, IPHC) ; Efthymiopoulos, Ilias (CERN) ; Koziol, Mateusz (AGH-UST, Cracow) ; Lacny, Lukasz J (AGH-UST, Cracow) ; Poussot, Pascal (Strasbourg, IPHC) ; Snamina, Jacek (AGH-UST, Cracow) et al.
One of the next challenges in fundamental physics is to understand the origin of matter/antimatter asymmetry in the Universe. In particular, intense neutrinos could play an important role to elucidate this mystery and better understand the expansion of the Universe. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 466-469
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.466-469
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9.
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HL-LHC Run 4 proton operational scenario
/ Tomas Garcia, Rogelio (CERN) ; Arduini, Gianluigi (CERN) ; Baudrenghien, Philippe (CERN) ; Bruning, Oliver (CERN) ; Bruce, Roderik (CERN) ; Buffat, Xavier (CERN) ; Calaga, Rama (CERN) ; De Maria, Riccardo (CERN) ; Dilly, Joschua Werner (Humboldt University of Berlin (DE)) ; Efthymiopoulos, Ilias (CERN) et al.
Following new findings in beam dynamics and the latest HL-LHC project decisions, an operational scenario has been developed for the first HL-LHC run, Run 4. [...]
CERN-ACC-2022-0001.
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2022. - 37 p.
Full text
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10.
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HL-LHC Experiment Data Quality Working Group Summary Report
/ Buffat, Xavier (CERN) ; Efthymiopoulos, Ilias (CERN) ; Medina Miranda, Luis David (CERN) ; Tomas Garcia, Rogelio (CERN) ; Wenninger, Jorg (CERN) ; Demers Konezny, Sarah Marie (Yale University (US)) ; Einsweiler, Kevin Frank (Lawrence Berkeley National Lab. (US)) ; Hawkings, Richard (CERN) ; Giacobbe, Benedetto (Universita e INFN, Bologna (IT)) ; Bohm, Christian (Stockholm University (SE)) et al.
This report summarizes the results of the HL-LHC Experimental Data Quality Working Group (EDQ WG). [...]
CERN-BE-2022-001.
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2022.
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