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Study of the performance and beam loss limitations during injection of high-intensity LHC proton beams
/ Salvachua, Belen (CERN) ; Lechner, Anton (CERN) ; Bracco, Chiara (CERN) ; Zamantzas, Christos (CERN) ; Wollmann, Daniel (CERN) ; Mirarchi, Daniele (CERN) ; Effinger, Ewald (CERN) ; Velotti, Francesco (CERN) ; Trad, Georges (CERN) ; Wenninger, Jorg (CERN) et al.
The LHC Injectors Upgrade project at CERN optimized the injection accelerator chain to deliver proton intensities per bunch of 2.3e+11 ppb. Throughout 2023, the LHC was filled with up to 2464 bunches per beam using a hybrid injection scheme, involving up to 236 bunches per injection, with a maximum intensity per bunch of 1.6e+11 ppb. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) THPR31
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.THPR31
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2.
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Operation of the LHC during the 2023 proton run
/ Calia, Andrea (CERN) ; Salvant, Benoit (CERN) ; Mirarchi, Daniele (CERN) ; Nisbet, David (CERN) ; Jacquet, Delphine (CERN) ; Métral, Elias (CERN) ; Bravin, Enrico (CERN) ; Trad, Georges (CERN) ; Wenninger, Jorg (CERN) ; Solfaroli, Matteo (CERN) et al.
In 2023 the LHC restarted after the yearly winter shutdown with a new machine configuration optimized for intensities of up to 1.8e+11 protons per bunch. In the first two months of the 2023 run the bunch intensities were pushed up to 1.6e+11 protons per bunch until a severe vacuum degradation, caused by a damaged RF bridge, occurred close to the ATLAS experiment. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) MOPC17
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPC17
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3.
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Calibration of the LHC Diamond beam loss monitors for LHC Run 3
/ Morales Vigo, Sara (CERN ; Cockcroft Inst. Accel. Sci. Tech.) ; Salvachua, Belen (CERN) ; Welsch, Carsten (Cockcroft Inst. Accel. Sci. Tech.) ; Zamantzas, Christos (CERN) ; Calvo Giraldo, Eva (CERN) ; Martinez Samblas, Javier (CERN) ; Wolfenden, Joseph (Cockcroft Inst. Accel. Sci. Tech.) ; Gonzalez-Berges, Manuel (CERN)
A set of twelve Polycrystalline Chemical Vapour Deposition (pCVD) diamond detectors are installed in the beam injection, extraction and betatron collimation areas of the Large Hadron Collider (LHC) as fast beam loss monitoring detectors. Their high-radiation tolerance and time resolution in the order of a few ns makes them an ideal candidate to monitor bunch-by-bunch losses in the LHC beams, which have a nominal bunch separation of 25 ns. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) THPL085
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPL085
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4.
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A review of the 2023 antiproton physics run in the CERN antimatter factory
/ Bojtar, Lajos (CERN) ; Lefort, Bertrand (CERN) ; Dupuy, Bruno (CERN) ; Gamba, Davide (CERN) ; Joergensen, Lars (CERN) ; Ponce, Laurette (CERN) ; Freyermuth, Pierre (CERN) ; Pasinelli, Sergio (CERN) ; Dutheil, Yann (CERN)
Despite a shorter-than-scheduled physics run due to a hardware problem, the AD/ELENA antiproton complex delivered record beam intensities to the experiments during the 2023 run. This paper reviews the performance of both the CERN Antiproton Decelerator (AD) and the Extra Low ENergy Antiproton (ELENA) decelerator and their associated transfer lines. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) TUPC08
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPC08
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5.
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Protection of extraction septa during asynchronous beam dumps in HL-LHC operation
/ Farina, E (CERN) ; Atanasov, M (CERN) ; Borburgh, J (CERN) ; Bracco, C (CERN) ; Dutheil, Y (CERN) ; Lechner, A (CERN) ; Maestre, J (CERN) ; Muñoz, P Andreu (CERN) ; Nuiry, F X (CERN) ; Schwarz, P (CERN) et al.
The LHC beam dump system was developed to safely and reliably dispose of the LHC beams at the end of physics fills or in case of emergency aborts. The beams are extracted by means of kicker magnets, deflecting the beams horizontally, and septa, which provide a vertical kick. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPA100
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPA100
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6.
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Beam lifetime monitoring using beam loss monitors during LHC Run 3
/ Morales Vigo, S (CERN ; Cockcroft Inst. Accel. Sci. Tech.) ; Salvachua, B (CERN) ; Welsch, C P (Cockcroft Inst. Accel. Sci. Tech.) ; Zamantzas, C (CERN) ; Wolfenden, J (Cockcroft Inst. Accel. Sci. Tech.) ; Hermes, P (CERN) ; Redaelli, S (CERN)
The Beam Loss Monitoring (BLM) system of the Large Hadron Collider (LHC) at CERN is essential for the protection of machine elements against energy deposition from beam losses. Employing around 4000 detectors placed around the 27-km LHC ring, the BLM system measures secondary particles continuously and can trigger beam extraction in less than 3 turns, in case the signals exceed certain predetermined thresholds. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) THPL086
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPL086
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7.
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Improved antiproton production beam at CERN
/ Lombard, Cedric (CERN ; ESS, Lund) ; Albright, Simon (CERN) ; Asvesta, Foteini (CERN) ; Chapuis, Fabrice (CERN) ; Damerau, Heiko (CERN) ; Dutheil, Yann (CERN) ; Di Giovanni, Gian Piero (CERN) ; Huschauer, Alexander (CERN) ; Lasheen, Alexandre (CERN) ; Mikulec, Bettina (CERN) et al.
Antiprotons are generated at CERN by extracting a high-intensity proton beamfrom the Proton Synchrotron (PS) onto a target. The resulting antiprotons arecaptured in the Antiproton Decelerator (AD) ring. [...]
2023
- Published in : JACoW IPAC 2023 (2023) TUPM075
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.TUPM075
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8.
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Beam Loss Signal Calibration for the LHC Diamond Detectors During Run 2
/ Morales Vigo, Sara (CERN ; Liverpool U.) ; Calvo Giraldo, Eva (CERN) ; Effinger, Ewald (CERN) ; Salvachua, Belen (CERN) ; Welsch, Carsten P (Liverpool U.) ; Wolfenden, Joseph (Liverpool U.) ; Zamantzas, Christos (CERN)
Chemical Vapour Deposition (CVD) diamond detectors can be used as fast beam loss monitors in particle accelerators. In the Large Hadron Collider (LHC) at CERN, they are installed in the betatron collimation region, a high-radiation environment. [...]
JACoW, 2021 - 4 p.
- Published in : JACoW IBIC 2021 (2021) 290-293
Fulltext: PDF;
In : 10th International Beam Instrumentation Conference (IBIC 2021), Online, Korea, 13 - 17 Sep 2021, pp.290-293
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9.
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Hybrid on-axis and off-axis top-up injection at the future circular lepton collider
/ Yue, Sen (CERN) ; Dutheil, Yann (CERN) ; Bartmann, Wolfgang (CERN) ; Johnson, Eliott (CERN) ; Martinek, Petr (CERN)
In order to maximize the integrated luminosity of the future circular lepton collider (FCC-ee), a top-up injection scheme is required. Amongst the four operation modes of FCC-ee, the Z operation mode has the highest stored beam energy in the collider ring with about 20 MJ per beam. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPR13
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPR13
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10.
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Flat-bottom instabilities in the CERN SPS
/ Schwarz, Markus (CERN) ; Iliakis, Konstantinos (CERN) ; Lasheen, Alexandre (CERN) ; Papotti, Giulia (CERN) ; Repond, Joël (CERN) ; Shaposhnikova, Elena (CERN) ; Timko, Helga (CERN)
At intensities of $2.6 \times 10^{11}$ protons per bunch (ppb), required at SPS injection for the High Luminosity LHC beam, longitudinal instabilities can degrade the beam quality delivered by the SPS, the LHC injector at CERN. In this paper, we concentrate on beam instability at flat bottom. [...]
CERN-ACC-2019-106.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPTS049
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPTS049
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