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1.
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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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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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4.
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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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5.
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Improved Protection of the Warm Magnets of the LHC Betatron Cleaning Insertion
/ Bahamonde Castro, Cristina (CERN) ; Cerutti, Francesco (CERN) ; Fessia, Paolo (CERN) ; Lechner, Anton (CERN) ; Mereghetti, Alessio (CERN) ; Mirarchi, Daniele (CERN) ; Redaelli, Stefano (CERN) ; Skordis, Eleftherios (U. Liverpool (main) ; CERN)
After the High Luminosity (HL) upgrade in 2024-2026, the LHC is anticipated to increase its integrated luminosity by a factor of 10 beyond its original design value of 300 fb-1. In preparation for this, several improvements to the equipment will already be implemented during the next Long Shutdown (LS2) starting in 2019. [...]
CERN-ACC-2017-120.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-MOPAB004
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.MOPAB004
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6.
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7.
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Study of the 2015 Top Energy LHC Collimation Quench Tests Through an Advanced Simulation Chain
/ Skordis, Eleftherios (U. Liverpool (main) ; CERN) ; Bruce, Roderik (CERN) ; Cerutti, Francesco (CERN) ; Ferrari, Alfredo (CERN) ; Hermes, Pascal (CERN) ; Lechner, Anton (CERN) ; Mereghetti, Alessio (CERN) ; Redaelli, Stefano (CERN) ; Salvachua, Belen (CERN) ; Vlachoudis, Vasilis (CERN) et al.
While the LHC has shown record-breaking perfor-mance during the 2016 run, our understanding of the behaviour of the machine must also reach new levels. The collimation system and especially the betatron cleaning insertion region (IR7), where most of the beam halo is intercepted to protect superconducting (SC) magnets from quenching, has so far met the expectations but could nonetheless pose a bottleneck for future operation at higher beam intensities for HL-LHC. [...]
CERN-ACC-2017-300.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-MOPAB012
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.MOPAB012
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8.
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Energy Deposition in the Betatron Collimation Insertion of the 100 TeV Future Circular Collider
/ Besana, Maria Ilaria (CERN) ; Bahamonde Castro, Cristina (CERN) ; Bertarelli, Alessandro (CERN) ; Bruce, Roderik (CERN) ; Carra, Federico (CERN) ; Cerutti, Francesco (CERN) ; Ferrari, Alfredo (CERN) ; Fiascaris, Maria (CERN) ; Lechner, Anton (CERN) ; Mereghetti, Alessio (CERN) et al.
The FCC proton beam is designed to carry a total energy of about 8500 MJ, a factor of 20 above the LHC. In this context, the collimation system has to deal with extremely tight requirements to prevent quenches and material damage. [...]
CERN-ACC-2017-303.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-MOPAB003
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.MOPAB003
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9.
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Simulation of Heavy-Ion Beam Losses with the SixTrack-FLUKA Active Coupling
/ Hermes, Pascal (CERN) ; Bruce, Roderik (CERN) ; Cerutti, Francesco (CERN) ; Ferrari, Alfredo (CERN) ; Jowett, John (CERN) ; Lechner, Anton (CERN) ; Mereghetti, Alessio (CERN) ; Mirarchi, Daniele (CERN) ; Ortega, Pablo (CERN) ; Redaelli, Stefano (CERN) et al.
The LHC heavy-ion program aims to further increase the stored ion beam energy, putting high demands on the LHC collimation system. Accurate simulations of the ion collimation efficiency are crucial to validate the feasibility of new proposed configurations and beam parameters. [...]
CERN-ACC-2016-217.-
2016 - 4 p.
- Published in : 10.18429/JACoW-IPAC2016-WEPMW029
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.WEPMW029
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10.
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Power Deposition in LHC Magnets Due to Bound-Free Pair Production in the Experimental Insertions
/ Bahamonde Castro, Cristina (CERN) ; Auchmann, Bernhard (CERN) ; Besana, Maria Ilaria (CERN) ; Brodzinski, Krzysztof (CERN) ; Bruce, Roderik (CERN) ; Cerutti, Francesco (CERN) ; Jowett, John (CERN) ; Lechner, Anton (CERN) ; Mertens, Tom (CERN) ; Parma, Vittorio (CERN) et al.
The peak luminosity achieved during Pb-Pb collisions in the LHC in 2015 (3x1027cm⁻²s^{−1}) well exceeded the design luminosity and is anticipated to increase by another factor 2 after the next Long Shutdown (2019- 2020). A significant fraction of the power dissipated in ultra-peripheral Pb-Pb collisions is carried by ions from bound-free pair production, which are lost in the dispersion suppressors adjacent to the experimental insertions. [...]
CERN-ACC-2016-264.-
2016 - 4 p.
- Published in : 10.18429/JACoW-IPAC2016-TUPMW006
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.TUPMW006
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