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LHC optics commissioning in 2023 and 2024
/ Persson, Tobias (CERN) ; Wegscheider, Andreas (CERN) ; Fol, Elena (CERN) ; Maclean, Ewen (CERN) ; Carlier, Felix (CERN) ; Soubelet, Felix (CERN) ; Trad, Georges (CERN) ; Keintzel, Jacqueline (CERN) ; Cardona, Javier (Columbia U.) ; Dilly, Joschua (CERN) et al.
The LHC machine configuration was changed in 2023 compared to previous years, requiring a new set of optics configurations to be measured and corrected. A telescopic optics was deployed in energy the ramp for the first time, which gave rise to a beta-beating of up to 25% [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) MOPC12
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPC12
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2.
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LHC 2023 ion optics commissioning
/ Ferrentino, Vittorio (Naples U. ; CERN) ; Wegscheider, Andreas (CERN) ; Gilardi, Antonio (CERN) ; Fol, Elena (CERN) ; Maclean, Ewen (CERN) ; Carlier, Felix (CERN) ; Soubelet, Felix (CERN) ; Keintzel, Jacqueline (CERN) ; Cardona, Javier (Colombia, U. Natl.) ; Dilly, Joschua (CERN) et al.
In 2023, about 2 months of LHC operation were devoted to Heavy Ion physics. In this paper, results of the 2023 ion optics commissioning are reported. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) MOPC20
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPC20
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3.
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LHC Run 3 optics corrections
/ Carlier, F (CERN) ; Ojeda, A Costa (CERN) ; De Maria, R (CERN) ; Dilly, J (CERN) ; Ferrentino, V (CERN) ; Fol, E (CERN) ; Hofer, M (CERN) ; Keintzel, J (CERN) ; Le Garrec, M (CERN) ; Maclean, E H (CERN) et al.
The first year of Run 3 of the Large Hadron Collider (LHC) revealed significant changes in both linear and nonlinear optics errors with respect to Run 2. Several iterations of optics corrections were required to successfully bring the linear optics within operational tolerances. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPL015
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL015
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4.
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Experimental Demonstration of Machine Learning Application in LHC Optics Commissioning
/ Fol, Elena (CERN) ; Cardona, Javier (Colombia, U. Natl.) ; Carlier, Felix (CERN) ; Dilly, Joschua (CERN) ; Hofer, Michael (CERN) ; Keintzel, Jacqueline (CERN) ; Le Garrec, Mael (CERN) ; Maclean, Ewen (CERN) ; Persson, Tobias (CERN) ; Soubelet, Felix (CERN) et al.
Recently, we conducted successful studies on the suitability of machine learning (ML) methods for optics measurements and corrections, incorporating novel ML-based methods for local optics corrections and reconstruction of optics functions. After performing extensive verifications on simulations and past measurement data, the newly developed techniques became operational in the LHC commissioning 2022. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 359-362
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.359-362
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5.
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Optics Correction Strategy for Run 3 of the LHC
/ Persson, Tobias (CERN) ; Cardona, Javier (Colombia, U. Natl.) ; Carlier, Felix (CERN) ; Costa Ojeda, Andressa (CERN) ; Dilly, Joschua (CERN) ; Ferrentino, Vittorio (CERN) ; Fol, Elena (CERN) ; García Morales, Hector (CERN) ; Hofer, Michael (CERN) ; Høydalsvik, Eirik (CERN) et al.
After more than 3 years of shutdown the LHC is again operational in 2022. Experience from the previous Long Shutdown (LS) has shown that the local errors in the triplet quadrupoles changed significantly between Run 1 and Run 2, and first measurements in 2022 unveil further changes. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 1687-1690
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1687-1690
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6.
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Progress on Action Phase Jump for LHC Local Optics Correction
/ Cardona, Javier F (Colombia, U. Natl.) ; García Morales, Hector (CERN) ; Hofer, Michael (CERN) ; Maclean, Ewen (CERN) ; Persson, Tobias (CERN) ; Rodriguez Garcia, Yohany (Colombia, U. Natl. ; Antonio Narino U.) ; Tomás García, Rogelio (CERN)
The correction of the local optics at the Interaction Regions of the LHC is crucial to ensure a good performance of the machine. This is even more important for the future LHC upgrade, HL-LHC, where the optics is more sensitive to magnetic errors. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 1850-1853
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1850-1853
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7.
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Summit of the N=40 Island of Inversion: precision mass measurements and ab initio calculations of neutron-rich chromium isotopes
/ Silwal, R. (TRIUMF ; Appalachian State U.) ; Andreoiu, C. (Simon Fraser U.) ; Ashrafkhani, B. (Calgary U.) ; Bergmann, J. (Giessen U.) ; Brunner, T. (McGill U.) ; Cardona, J. (TRIUMF ; Manitoba U.) ; Dietrich, K. (TRIUMF ; Heidelberg U.) ; Dunling, E. (TRIUMF ; York U., England) ; Gwinner, G. (Manitoba U.) ; Hockenbery, Z. (TRIUMF ; McGill U.) et al.
Mass measurements continue to provide invaluable information for elucidating nuclear structure and scenarios of astrophysical interest. The transition region between the $Z = 20$ and $28$ proton shell closures is particularly interesting due to the onset and evolution of nuclear deformation as nuclei become more neutron rich. [...]
arXiv:2204.09566.-
2022-10-10 - 12 p.
- Published in : Phys. Lett. B 833 (2022) 137288
Fulltext: PDF;
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8.
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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..
CERN-ACC-2022-0004.
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2022. - 104 p.
Full text
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9.
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HL-LHC Local Linear Optics Correction at the Interaction Regions
/ García Morales, Hector (Oxford U.) ; Cardona, Javier (Colombia, U. Natl.) ; Tomás García, Rogelio (CERN) ; Fol, E (CERN)
Magnetic imperfections of the HL-LHC inner triplet are expected to generate a significant \beta-beating. For that reason, improved local optics correction techniques at the low-\beta insertions is essential to ensure a high luminosity performance in the HL-LHC. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 628-631
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.628-631
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