1.
|
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
|
|
2.
|
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
|
|
3.
|
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
|
|
4.
|
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
|
|
5.
|
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
|
|
6.
|
Updated High-Energy LHC design
/ Zimmermann, Frank (CERN) ; Abelleira, Jose Luis (JAI, UK) ; Abramov, Andrey (JAI, UK ; Royal Holloway, U. of London) ; Amorim, David (CERN) ; Antipov, Sergey (CERN) ; Apyan, Armen (Yerevan Phys. Inst.) ; Arsenyev, Sergey (CERN) ; Barranco, Javier (Ecole Polytechnique, Lausanne) ; Benedikt, Michael (CERN) ; Bruce, Roderik (CERN) et al.
We present updated design parameters for a future High-Energy LHC. A more realistic turnaround time has led to a revision of the target peak luminosity, as well as a choice of a larger IP beta function, and longer physics fills. [...]
CERN-ACC-2019-089.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPMP037
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPMP037
|
|
7.
|
Analysis and Operational Feedback on the New Design of the High Energy Beam Dump in the CERN SPS
/ Rios Rodriguez, Paula (CERN) ; Briz Monago, Jose (CERN) ; Calviani, Marco (CERN) ; Cornelis, Karel (CERN) ; De Man, Sven (CERN) ; Esposito, Raffaele (CERN) ; Gilardoni, Simone (CERN) ; Goddard, Brennan (CERN) ; Grenard, Jean-Louis (CERN) ; Grenier, Damien (CERN) et al.
CERN's Super Proton Synchrotron (SPS) high-energy internal dump (Target Internal Dump Vertical Graphite, known as TIDVG) is required to intercept beams from 10² to 450 GeV. The equipment installed in 2014 (TIDVG#3) featured an absorbing core composed of different materials surrounded by a water-cooled copper jacket, which hold the UHV of the machine. [...]
CERN-ACC-2017-172.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-WEPVA110
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.WEPVA110
|
|
8.
|
Beam Profile Measurements as Part of the Safe and Efficient Operation of the New SPS Beam Dump System
/ Topaloudis, Athanasios (CERN) ; Bravin, Enrico (CERN) ; Burger, Stephane (CERN) ; Jackson, Stephen (CERN) ; Velotti, Francesco (CERN) ; Veyrunes, Eric (CERN)
In the framework of the LHC Injectors Upgrade (LIU) project, the Super Proton Synchrotron (SPS) accelerator at CERN is undergoing a profound upgrade including a new high-energy beam dump. The new Target Internal Dump Vertical Graphite (TIDVG#5) is designed to withstand an average dumped beam power as high as 235 kW to cope with the increased intensity and brightness of the LIU beams whose energies in the SPS range from 14 to 450 GeV. [...]
2022 - 4 p.
- Published in : JACoW ICALEPCS2021 (2022) 764-767
Fulltext: PDF;
In : 18th International Conference on Accelerator and Large Experimental Physics Control Systems, Online, 18 - 22 Oct 2021, pp.764-767
|
|
9.
|
Experimental Test of a New Method to Verify Retraction Margins Between Dump Absorbers and Tertiary Collimators at the LHC
/ Wiesner, Christoph (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Bruce, Roderik (CERN) ; Molson, James (CERN) ; Schaumann, Michaela (CERN) ; Staufenbiel, Christian (CERN) ; Uythoven, Jan (CERN) ; Valette, Matthieu (CERN) ; Wenninger, Jorg (CERN) et al.
The protection of the tertiary collimators (TCTs) and the LHC triplet aperture in case of a so-called asynchronous beam dump relies on the correct retraction between the TCTs and the dump region absorbers. A new method to validate this retraction has been proposed, and a proof-of-principle experiment was performed at the LHC. [...]
JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 115-118
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.115-118
|
|
10.
|
The Effect of a Partially Depleted Halo on the Criticality and Detectability of Fast Failures in the HL-LHC
/ Hernalsteens, Cédric (CERN) ; Lannoy, Christophe (CERN) ; Tuormaa, Oskari (CERN) ; Villén Basco, Meritxell (CERN) ; Wiesner, Christoph (CERN) ; Wollmann, Daniel (CERN)
In the High Luminosity LHC (HL-LHC) era, the bunch intensity will be increased to 2.2 $\times$ 10$^{11}$ protons, which is almost twice the nominal LHC intensity. The stored energy in each of the two beams will increase to 674 MJ. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 1866-1869
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1866-1869
|
|