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1.
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HL-LHC series collimators: key technical requirements, crucial production challenges and risk mitigation plan
/ Piccinni, Carla (CERN) ; Perillo Marcone, Antonio (CERN) ; Senajova, Dominika (CERN) ; Baillard, Dylan (CERN) ; Grenier-Boley, Edouard (CERN) ; Nuiry, Francois-Xavier (CERN) ; Calviani, Marco (CERN) ; Seidenbinder, Regis (CERN) ; Redaelli, Stefano (CERN)
In view of High Luminosity (HL) - Large Hadron Collider (LHC) project, an upgraded collimation system has been developed to accommodate a rise of ten times of the integrated luminosity compared to the LHC. A new series of collimators will be produced and installed in the machine during the Long Shutdown 3 (LS3) to take place during 2026-2028. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) TUPC75
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPC75
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2.
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Collimation of 400 MJ Beams at the LHC: The First Step Towards the HL-LHC Era
/ Redaelli, Stefano (CERN) ; Abramov, Andrey (CERN) ; Baillard, Dylan (CERN) ; Bruce, Roderik (CERN) ; Cai, Rongrong (CERN ; Ecole Polytechnique, Lausanne) ; Carra, Federico (CERN) ; D'Andrea, Marco (CERN) ; Di Castro, Mario (CERN) ; Giacomel, Lorenzo (CERN) ; Hermes, Pascal (CERN) et al.
An important upgrade programme is planned for the collimation system of the CERN Large Hadron Collider (LHC) in order to meet the challenges of the upcoming High-Luminosity LHC (HL-LHC) project. A first stage of the HL-LHC upgrade was already deployed during the last LHC Long Shutdown, offering important improvements of the collimation cleaning, a significant reduction of the impedance contribution and better cleaning of collisional debris, in particular for ion-ion collisions. [...]
2024 - 4 p.
- Published in : JACoW HB 2023 (2024) 603-606
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.603-606
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3.
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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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4.
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Beam-Impact Validation of HL-LHC Collimator Materials: the "MultiMat-2" Experiment
/ Carra, F (CERN) ; Accettura, C (CERN) ; Bertarelli, A (CERN) ; Berthomé, E (CERN) ; Bruce, R (CERN) ; Charitonidis, N (CERN) ; Dalemir, M (CERN) ; Farina, E (CERN) ; Guardia-Valenzuela, J (CERN) ; Guinchard, M (CERN) et al.
In 2017, a proton-impact test HL-LHC collimator materials was carried out in the HiRadMat facility at CERN. The experiment, called “MultiMat”, enabled the testing of bulk and coated materials developed at CERN for different beam collimation functionalities. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) WEPM109
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPM109
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5.
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Overview of material choices for HL-LHC collimators
/ Accettura, C (CERN) ; Biancacci, N (CERN) ; Bruce, R (CERN) ; Carra, F (CERN) ; Mounet, N (CERN) ; Kurtulus, A (CERN ; Zurich, ETH) ; Nuiry, F -X (CERN) ; Perillo Marcone, A (CERN) ; Redaelli, S (CERN)
In view of the High-Luminosity (HL-LHC) upgrade of the LHC collimation system, different materials were investigated to determine how the jaws of the new collimators could be manufactured to meet the demanding requirements of HL-LHC, such as thermomechanical robustness and stability, RF impedance, UHV, etc. During the Long-Shutdown 2 (LS2), five primary and 10 secondary low-impedance collimators were already produced using novel material. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) WEPA148
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPA148
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6.
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FIB-SEM investigation and uniaxial compression of flexible graphite
/ Solfiti, Emanuele (Norwegian U. Sci. Tech.) ; Wan, Di (Norwegian U. Sci. Tech.) ; Celotto, Ambra (Norwegian U. Sci. Tech.) ; Solieri, Nicola (CERN) ; Munoz, Pablo Andreu (CERN) ; Ximenes, Rui Franqueira (CERN) ; Heredia, Jorge Maestre (CERN) ; Martin, Claudio Leopoldo Torregrosa (CERN) ; Nuiry, Antonio Perillo Marcone Francois-Xavier (CERN) ; Nuiry, F.X. (CERN) et al.
Flexible graphite (FG) with 1 - 1.2 g/cm$^3$ density is employed as beam energy absorber material in the CERN's Large Hadron Collider (LHC) beam dumping system. However, the increase of energy deposited expected for new HL-LHC (High-Luminosity LHC) design demanded for an improvement in reliability and safety of beam dumping devices, and the need for a calibrated material model suitable for high-level FE simulations has been prioritized. [...]
arXiv:2304.04021.-
2023-07-26 - 16 p.
- Published in : Materials & Design 233 (2023) 112187
Fulltext: 2304.04021 - PDF; Publication - PDF;
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7.
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Irradiation of Low-Z Carbon-Based Materials with 440 GeV/c Proton Beam for High Energy & Intensity Beam Absorbers: The CERN HiRadMat-56-HED Experiment
/ Andreu Muñoz, Pablo (CERN) ; Calviani, Marco (CERN) ; Charitonidis, Nikolaos (CERN) ; Cherif, Ahmed (CERN) ; Farina, Edoardo (CERN) ; Krainer, Alexander (CERN) ; Lechner, Anton (CERN) ; Maestre, Jorge (CERN) ; Nuiry, Francois-Xavier (CERN) ; Seidenbinder, Regis (CERN) et al.
The beam stored energy and the peak intensity of CERN Large Hadron Collider (LHC) will grow in the next few years. The former will increase from the 320 MJ values of Run2 (2015-2018) to almost 540 MJ during Run3 (2022 onwards) and 680 MJ during the HL-LHC era putting stringent requirements on beam intercepting devices, such as absorbers and dumps. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 2883-2886
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2883-2886
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8.
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Achievements and Performance Prospects of the Upgraded LHC Injectors
/ Kain, Verena (CERN) ; Albright, Simon (CERN) ; Alemany-Fernández, Reyes (CERN) ; Angoletta, Maria Elena (CERN) ; Antoniou, Fanouria (CERN) ; Argyropoulos, Theodoros (CERN) ; Asvesta, Foteini (CERN) ; Balhan, Bruno (CERN) ; Barnes, Michael (CERN) ; Barrientos, Diego (CERN) et al.
To provide HL-LHC performance, the CERN LHC injector chain underwent a major upgrade during an almost 2-year-long shutdown. In the first half of 2021 the injectors were gradually re-started with the aim to reach at least pre-shutdown parameters for LHC as well as for fixed target beams. [...]
2022 - 6 p.
- Published in : JACoW IPAC 2022 (2022) 1610-1615
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1610-1615
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9.
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Conceptual Design of the FCC-ee Beam Dumping System
/ Krainer, Alexander (CERN) ; Andreu Muñoz, Pablo (CERN) ; Bartmann, Wolfgang (CERN) ; Calviani, Marco (CERN) ; Dutheil, Yann (CERN) ; Lechner, Anton (CERN) ; Nuiry, Francois-Xavier (CERN) ; Perillo-Marcone, Antonio (CERN) ; Ramjiawan, Rebecca (JAI, UK ; CERN)
The Future Circular electron-positron Collider (FCC-ee) will feature stored beam energies of up to 18 MJ. This is a factor 100 higher than any current or past lepton collider. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 1753-1756
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1753-1756
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10.
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Sigraflex® Studies for LHC CERN Beam Dump: Summary and Perspective
/ Heredia, Jorge (CERN) ; Alvaro, Antonio (SINTEF, Oslo) ; Berto, Filippo (Norwegian U. Sci. Tech.) ; Calviani, Marco (CERN) ; Franqueira Ximenes, Rui (CERN) ; Grenier, Damien (CERN) ; Kershaw, Keith (CERN) ; Lechner, Anton (CERN) ; Andreu-Muñoz, Pablo Andreu (CERN) ; Nuiry, Francois-Xavier (CERN) et al.
The Large Hadron Collider (LHC) beam dump (TDE) is essential for safe and reliable operation of the collider. It absorbs particles extracted from the accelerator whenever required. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 3571-3574
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.3571-3574
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