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Settings for Improved Betatron Collimation in the First Run of the High Luminosity LHC
/ Lindström, Bjorn (CERN) ; Abramov, Andrey (CERN) ; Bruce, Roderik (CERN) ; De Maria, Riccardo (CERN) ; Hermes, Pascal (CERN) ; Molson, James (CERN) ; Redaelli, Stefano (CERN) ; Van der Veken, Frederik (CERN)
The current betatron collimation system in the LHC is not optimized to absorb off-momentum particles scattered out from the primary collimators. The highest losses are concentrated in the downstream dispersion suppressor (DS). [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 1366-1369
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1366-1369
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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
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Collimation Strategies for Secondary Beams in FCC-hh Ion-Ion Operation
/ Hunt, James (CERN) ; Bruce, Roderik (CERN) ; Carra, Federico (CERN) ; Cerutti, Francesco (CERN) ; Guardia-Valenzuela, Jorge (CERN) ; Molson, James (CERN)
The target peak luminosity of the CERN FCC-hh during Pb-Pb collisions is more than a factor of 50 greater than that achieved by the LHC in 2018. As a result, the intensity of secondary beams produced in collisions at the interaction points will be significantly higher than previously experienced. [...]
JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) WEPAB025
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.WEPAB025
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Gamma Factory for CERN initiative - progress report
/ Dutheil, Yann (CERN) ; Abramov, Andrey (Royal Holloway, U. of London) ; Alden, Siobhan (Royal Holloway, U. of London) ; Alemany Fernandez, Reyes (CERN) ; Antsiferov, Pavel (Troitsk, IZMIRAN) ; Apyan, Armen (NAS Armenia, Yerevan) ; Bartosik, Hannes (CERN) ; Bessonov, Evgeny (Lebedev Inst.) ; Biancacci, Nicolo (CERN) ; Bieron, Jacek (Jagiellonian U.) et al.
The Gamma Factory (GF) initiative proposes to use partially stripped ion (PSI) beams as drivers of a new type of high-intensity and high-energy (0.1–400 MeV) photon source. As part of the ongoing Physics Beyond Collider studies, initial beam tests were carried out in 2017 and 2018 at the SPS and LHC with partially stripped xenon and lead beams [...]
CERN-PBC-CONF-2021-006.-
SISSA, 2020 - 10 p.
- Published in : PoS EPS-HEP2019 (2020) 020
Fulltext from publisher: PDF;
In : European Physical Society Conference on High Energy Physics (EPS-HEP) 2019, Ghent, Belgium, 10 - 17 Jul 2019, pp.020
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Run 2 Collimation Overview
/ Fuster Martinez, N. (CERN) ; Abramov, A (CERN ; Royal Holloway, U. of London) ; Azzopardi, G (CERN ; Malta U.) ; Belli, E (CERN) ; Boscolo-Meneguolo, C (CERN) ; Bruce, R (CERN) ; D' Andrea, M. (CERN ; Padua U.) ; Di Castro, M. (CERN) ; Fiascari, M (CERN) ; Fomin, A (CERN ; Kharkov, KIPT) et al.
The LHC 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 the background in the experiments. All Run 2 proton and ion runs were successfully completed with no magnet quenches from slow losses of the circulating beam. [...]
2019 - 16 p.
- Published in : , pp. 149-164
Fulltext: PDF;
In : 9th LHC Operations Evian Workshop, Evian Les Bains, France, 30 Jan - 1 Feb 2019, pp.149-164
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ebook
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Merlin++, a flexible and feature-rich accelerator physics and particle tracking library
/ Appleby, Robert B. (U. Manchester (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Barlow, Roger J. (Huddersfield U.) ; Kruecker, Dirk (DESY) ; Molson, James (CERN) ; Rowan, Scott (Huddersfield U.) ; Tygier, Sam (U. Manchester (main)) ; Rafique, Haroon (CERN) ; Walker, Nicholas (DESY) ; Wolski, Andrzej (U. Liverpool (main) ; Cockcroft Inst. Accel. Sci. Tech.)
Merlin++ is a C++ charged-particle tracking library developed for the simulation and analysis of complex beam dynamics within high energy particle accelerators. Accurate simulation and analysis of particle dynamics is an essential part of the design of new particle accelerators, and for the optimization of existing ones. [...]
arXiv:2011.04335.-
2022-02 - 17 p.
- Published in : Comput. Phys. Commun. 271 (2022) 108204
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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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