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(100)

Simulated impact of the HL-LHC beam on a graphite target / Hjelle, Ingrid (CERN) ; Lechner, Anton (CERN ; Rome U.) ; Piccini, Audrey (CERN) ; Wiesner, Christoph (CERN) ; Wollmann, Daniel (CERN) ; Carra, Federico (CERN) ; Heron, John (CERN) ; Pasquali, Michele (CERN)
In the High Luminosity Large Hadron Collider (HL-LHC) era, the intensity of the circulating bunches will increase to 2.2e+11 protons per bunch, almost twice the nominal LHC value. Besides detailed studies of known and new failure cases for HL-LHC, it is also required to investigate failures beyond nominal design. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) MOPC18 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPC18

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(91)

Study of Hydrodynamic-Tunnelling Effects Induced by High-Energy Proton Beams in Graphite / Wiesner, Christoph (CERN) ; Carra, Federico (CERN) ; Don, Jeppe (CERN) ; Kolthoff, Inken (CERN) ; Lechner, Anton (CERN) ; Rasile, Silvio (CERN) ; Wollmann, Daniel (CERN)
The design and assessment of machine-protection systems for existing and future high-energy accelerators comprises the study of accidental beam impact on machine elements. In case of a direct impact of a large number of high-energy particle bunches in one location, the damage range in the material is significantly increased due to an effect known as hydrodynamic tunnelling. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 1870-1873 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1870-1873

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(86)

Efficient Coupling of Hydrodynamic and Energy-Deposition Codes for Hydrodynamic-Tunnelling Studies on High-Energy Particle Accelerators / Wiesner, Christoph (CERN) ; Carra, Federico (CERN) ; Kruse-Hansen, Jens (CERN) ; Masci, Marco (CERN) ; Nie, Yuancun (KIT, Karlsruhe) ; Wollmann, Daniel (CERN)
The machine-protection evaluation of high-energy accelerators comprises the study of beyond-design failures, including the direct beam impact onto machine elements. In case of a direct impact, the nominal beam of the Large Hadron Collider (LHC) would penetrate more than 30 meters into a solid copper target. [...]
2021 - 4 p. - Published in : 10.18429/JACoW-IPAC2021-MOPAB024 Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, Br, 24 - 28 May 2021, pp.119-122

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(72)

Energy deposition challenges for the HL-LHC beam dump / Farina, E (CERN) ; Banks, T G (CERN) ; Bracco, C (CERN) ; Calviani, M (CERN) ; Dutheil, Y (CERN) ; Lechner, A (CERN) ; Solieri, N (CERN)
The LHC beam dump system has the task of safely and reliably disposing of the extracted beams from 450 GeV to 7 TeV. The present dump assembly consists of a multi-segment graphite core, which is contained in a duplex stainless steel vessel with titanium windows. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) MOPA101 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPA101

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(69)

Simulation of Hydrodynamic Tunneling Caused by High-Energy Proton Beam in Copper through Coupling of FLUKA and Autodyn / Nie, Yuancun (CERN) ; Bertarelli, Alessandro (CERN) ; Carra, Federico (CERN) ; Fichera, Claudio (CERN) ; Mettler, Linus (UC, Berkeley (main)) ; Schmidt, Ruediger (Darmstadt, Tech. U.) ; Wollmann, Daniel (CERN)
For machine protection of high-energy colliders, it is important to assess potential damages caused to accelerator components in case large number of bunches are lost at the same place. The numerical assessment requires an iterative execution of an energy-deposition code and a hydrodynamic code, since the hydrodynamic tunneling effect will likely play an important role in the beam-matter interactions. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-MOPMF046 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF046

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(57)

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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(53)

Effect of a Spurious CLIQ Firing on the Circulating Beam in HL-LHC / Hernalsteens, Cédric (CERN) ; Lindström, Bjorn (CERN) ; Ravaioli, Emmanuele (CERN) ; Tuormaa, Oskari (CERN) ; Villén Basco, Meritxell (CERN) ; Wiesner, Christoph (CERN) ; Wollmann, Daniel (CERN)
he High Luminosity LHC (HL-LHC) will reach a nominal, levelled luminosity of 5$\times$10$^{34}$ cm$^{-1}$ s$^{-2}$ and a stored energy of nearly 700 MJ in each of the two proton beams. The new large-aperture final focusing Nb$_3$Sn quadrupole magnets in IR1 and IR5, which are essential to achieve the luminosity target, will be protected using the novel Coupling Loss Induced Quench (CLIQ) system. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 1862-1865 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1862-1865

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(53)

Design of the Target Dump Injection Segmented (TDIS) in the Framework of the High Luminosity Large Hadron Collider (HL-LHC) Project / Teofili, Lorenzo (CERN ; Rome U. ; INFN, Rome) ; Carbajo Perez, David (CERN) ; Lamas Garcia, Inigo (CERN) ; Migliorati, Mauro (CERN ; INFN, Rome ; Rome U.) ; Perillo, Antonio (CERN)
The High Luminosity Large Hadron Collider (HL-LHC) Project at CERN calls for increasing beam brightness and intensity. In this scenario, most equipment has to be re- designed and rebuilt. [...]
2018 - 5 p. - Published in : 10.18429/JACoW-HB2018-TUP2WE04 Fulltext: PDF;
In : 61st ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Daejeon, Korea, 17 - 22 Jun 2018, pp.TUP2WE04

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(52)

Simulation of hydrodynamic tunneling induced by high-energy proton beam in copper by coupling computer codes / Nie, Y (CERN) ; Fichera, C (CERN) ; Mettler, L (CERN) ; Carra, F (CERN) ; Schmidt, R (CERN) ; Tahir, N A (Darmstadt, GSI) ; Bertarelli, A (CERN) ; Wollmann, D (CERN)
The design of machine protection systems for high-energy accelerators with high-intensity beams requires analyzing a large number of failures leading to beam loss. One of the most serious failures is an accidental impact of a large number of bunches at one location, for example, due to a deflection of the particle beams by the extraction kicker magnets with the wrong strength. [...]
2019 - 16 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 014501 Fulltext from Publisher: PDF;

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Disassembly of the HRMT-65 experiment
The HRMT-65 HLTDE experiment performed at CERN is [...]
10-09-2024

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