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Risk of Halo-Induced Magnet Quenches in the HL-LHC Beam Dump Insertion
/ Potoine, Jean-Baptiste (CERN ; Montpellier U.) ; Apollonio, Andrea (CERN) ; Belli, Eleonora (CERN) ; Bracco, Chiara (CERN) ; Bruce, Roderik (CERN) ; D'Andrea, Marco (CERN) ; García Alía, Ruben (CERN) ; Lechner, Anton (CERN) ; Lerner, Giuseppe (CERN) ; Morales Vigo, Sara (CERN) et al.
After the High Luminosity (HL-LHC) upgrade, the LHC will be exposed to a higher risk of magnet quenches during periods of short beam lifetime. Collimators in the extraction region (IR6) assure the protection of magnets against asynchronous beam dumps, but they also intercept a fraction of the beam halo leaking from the betatron cleaning insertion. [...]
2021 - 4 p.
- Published in : 10.18429/JACoW-IPAC2021-MOPAB002
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.41
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2.
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Power Deposition in Superconducting Dispersion Suppressor Magnets Downstream of the Betatron Cleaning Insertion for HL-LHC
/ Waets, Andreas (CERN) ; Bahamonde Castro, Cristina (CERN) ; Belli, Eleonora (CERN) ; Bruce, Roderik (CERN) ; Fuster-Martínez, Nuria (CERN) ; Lechner, Anton (CERN) ; Mereghetti, Alessio (CERN) ; Redaelli, Stefano (CERN) ; Sabaté-Gilarte, Marta (CERN) ; Skordis, Eleftherios (CERN)
The power deposited in dispersion suppressor magnets downstream of the Large Hadron Collider (LHC) betatron cleaning insertion is governed by off-momentum particles scattered out of the primary collimators. In order to mitigate the risk of magnet quenches during periods of short beam lifetime in future High-Luminosity (HL-LHC) operation, new dispersion suppressor (DS) collimators are considered for installation (one per beam). [...]
2021 - 4 p.
- Published in : 10.18429/JACoW-IPAC2021-MOPAB001
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, Br, 24 - 28 May 2021, pp.37-40
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3.
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ebook
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4.
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Simulations of heavy-ion halo collimation at the CERN Large Hadron Collider: benchmark with measurements and cleaning performance evaluation
/ Fuster-Martínez, N. (CERN) ; Bruce, R. (CERN) ; Cerutti, F. (CERN) ; De Maria, R. (CERN) ; Hermes, P. (CERN) ; Lechner, A. (CERN) ; Mereghetti, A. (CERN) ; Molson, J. (CERN) ; Redaelli, S. (CERN) ; Skordis, E. (CERN) et al.
Protons and heavy-ion beams at unprecedented energies are brought into collisions in the CERN Large Hadron Collider for high-energy experiments. The LHC multi-stage collimation system is designed to provide protection against regular and abnormal losses in order to reduce the risk of quenches of the superconducting magnets as well as keeping background in the experiments under control. [...]
arXiv:2008.03234.-
2020-11-07 - 23 p.
- Published in : Phys. Rev. Accel. Beams 23 (2020) 111002
Fulltext: PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF;
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5.
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Collimation system studies for the FCC-hh
/ Bruce, Roderik (CERN) ; Abramov, Andrey (JAI, UK ; CERN) ; Bertarelli, Alessandro (CERN) ; Besana, Maria Ilaria (CERN) ; Carra, Federico (CERN) ; Cerutti, Francesco (CERN) ; Faus-Golfe, Angeles (Orsay, LAL) ; Fiascaris, Maria (CERN) ; Gobbi, Giorgia (CERN) ; Krainer, Alexander (CERN) et al.
The Future Circular Collider (FCC-hh) is being designed as a 100 km ring that should collide 50 TeV proton beams. At 8.3 GJ, its stored beam energy will be a factor 28 higher than what has been achieved in the Large Hadron Collider, which has the highest stored beam energy among the colliders built so far. [...]
CERN-ACC-2019-079.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPRB048
Preprint: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPRB048
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6.
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Mechanical robustness of HL-LHC collimator designs
/ Carra, Federico (CERN) ; Bertarelli, Alessandro (CERN) ; Gobbi, Giorgia (CERN) ; Guardia-Valenzuela, Jorge (CERN ; U. Zaragoza (main)) ; Guinchard, Michael (CERN) ; Harden, Fiona (CERN) ; Pasquali, Michele (CERN) ; Redaelli, Stefano (CERN) ; Skordis, Eleftherios (CERN)
Two new absorbing materials were developed as collimator inserts to fulfil the requirements of HL-LHC higher brightness beams: molybdenum-carbide graphite (MoGr) and copper-diamond (CuCD). These materials were tested under intense beam impacts at CERN HiRadMat facility in 2015, when full jaw prototypes were irradiated. [...]
CERN-ACC-2019-162.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPTS091
Preprint: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPTS091
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7.
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Simulation Tools for Heavy-Ion Tracking and Collimation
/ Hermes, P.D. (CERN) ; Bruce, R. (CERN) ; Cerutti, F. (CERN) ; Ferrari, A. (CERN) ; Jowett, J.M. (CERN) ; Lechner, A. (CERN) ; Mereghetti, A. (CERN) ; Mirarchi, D. (CERN) ; Ortega, P.G. (CERN) ; Redaelli, S. (CERN) et al.
The LHC collimation system, which protects the LHC hardware from undesired beam loss, is less efficient with heavy-ion beams than with proton beams due to fragmentation into other nuclides inside the LHC collimators. Reliable simulation tools are required to estimate critical losses of particles scattered out of the collimation system which may quench the superconducting LHC magnets. [...]
2018 - 17 p.
- Published in : 10.23732/CYRCP-2018-002.73
Fulltext: PDF;
In : ICFA Mini-Workshop on Tracking for Collimation in Particle Accelerators, pp.73
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8.
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FLUKA coupling to Sixtrack
/ Skordis, E. ; Vlachoudis, V. ; Bruce, R. (CERN) ; Cerutti, F. (CERN) ; Ferrari, A. (CERN) ; Lechner, A. (CERN) ; Mereghetti, A. (CERN) ; Ortega, P.G. (CERN) ; Redaelli, S. (CERN) ; Pastor, D. Sinuela (CERN)
SixTrack [1] and FLUKA [2,3] are simulation tools regularly used at CERN to perform LHC collimation studies. Until recently the communication between the two codes was weakly based on the use of file exchange. [...]
2018 - 9 p.
- Published in : 10.23732/CYRCP-2018-002.17
Fulltext: PDF;
In : ICFA Mini-Workshop on Tracking for Collimation in Particle Accelerators, pp.17
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9.
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Validation of energy deposition simulations for proton and heavy ion losses in the CERN Large Hadron Collider
/ Lechner, A (CERN) ; Auchmann, B (CERN) ; Baer, T (CERN) ; Bahamonde Castro, C (CERN) ; Bruce, R (CERN) ; Cerutti, F (CERN) ; Esposito, L S (CERN) ; Ferrari, A (CERN) ; Jowett, J M (CERN) ; Mereghetti, A (CERN) et al.
Monte Carlo shower simulations are essential for understanding and predicting the consequences of beam losses in high-energy proton and ion colliders. Shower simulations are routinely used at CERN for estimating the beam-induced energy deposition, radiation damage, and radioactivity in the Large Hadron Collider (LHC). [...]
2019 - 24 p.
- Published in : Phys. Rev. Accel. Beams 22 (2019) 071003
Fulltext from Publisher: PDF;
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10.
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BLM threshold evolution and 2016 proposal
/ Kalliokoski, M (CERN) ; Auchmann, B (CERN) ; Dehning, B (CERN) ; Sousa, F S Domingues (CERN) ; Effinger, E (CERN) ; Grishin, V (CERN) ; Holzer, E B (CERN) ; Jackson, S (CERN) ; Kolad, B (CERN) ; Lechner, A (CERN) et al.
In total, over 5700 changes to the BLM thresholds were made during 2015. The new
thresholds are based on the operational experience from Run 1, on new simulation
models and on results from quench tests performed so far. [...]
Geneva : CERN, 2016 - 6 p.
- Published in : (2016) , pp. 191-196
Fulltext: PDF;
In : 6th Evian Workshop on LHC beam operation, Evian Les Bains, France, 15 - 17 Dec 2015, pp.191-196
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