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Characterization of bent crystals for beam collimation with 6.8 TeV proton beams at the LHC
/ D'Andrea, Marco (CERN) ; Aberle, Oliver (CERN) ; Abramov, Andrey (CERN) ; Bandiera, Laura (INFN, Ferrara) ; Bruce, Roderik (CERN) ; Cai, Rongrong (CERN ; EPFL-ISIC, Lausanne) ; Calviani, Marco (CERN) ; Demassieux, Quentin (CERN) ; Dewhurst, Kay Alana (CERN) ; Di Castro, Mario (CERN) et al.
The concept of crystal collimation exploits the peculiar properties of crystalline materials to deflect high-energy beam particles at angles orders of magnitude larger than what can be achieved with scattering by conventional materials used as primary collimators. This innovative technique is planned to be used to improve the collimation efficiency with heavy-ion beams at the Large Hadron Collider (LHC) and its High-Luminosity upgrade (HL-LHC). [...]
2023 - 8 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1060 (2024) 169062
Publication: PDF;
In : 9th International Conference on Charged & Neutral Particles Channeling Phenomena (Channeling 2023), Riccione, Italy, 4 - 9 June 2023, pp.169062
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2.
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Simulation framework and measurements of crystal collimation of proton beams at the Large Hadron Collider
/ Cai, Rongrong (CERN ; LPHE, Lausanne) ; Bruce, Roderik (CERN) ; D'Andrea, Marco (CERN) ; Salvatore Esposito, Luigi (CERN) ; Hermes, Pascal (CERN) ; Lechner, Anton (CERN) ; Mirarchi, Daniele (CERN) ; Nevay, Laurence (CERN) ; Potoine, Jean Baptiste (CERN ; Montpellier U.) ; Redaelli, Stefano (CERN) et al.
Thanks to its versatility in deploying large kicks with high efficiency, crystal channeling is being integrated more and more into modern particle accelerators. For example, at the CERN Large Hadron Collider, crystals are used, or planned to be used for collimation and fixed-target opportunities for the Physics Beyond Colliders studies. [...]
2023 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1060 (2024) 169038
Fulltext: PDF;
In : 9th International Conference on Charged & Neutral Particles Channeling Phenomena (Channeling 2023), Riccione, Italy, 4 - 9 June 2023, pp.169038
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3.
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Crystal collimation performance at the LHC with a 6.8 TeV proton beam
/ D'Andrea, M (CERN) ; Aberle, O (CERN) ; Abramov, A (CERN) ; Bruce, R (CERN) ; Cai, R (CERN ; Ecole Polytechnique, Lausanne) ; Calviani, M (CERN) ; Demassieux, Q (CERN) ; Dewhurst, K A (CERN) ; Di Castro, M (CERN) ; Esposito, L S (CERN) et al.
Crystal collimation is studied to improve the collimation efficiency with ion beams at the High-Luminosity Large Hadron Collider (HL-LHC). Bent crystals are used instead of conventional primary collimators to deflect high-energy halo particles at angles orders of magnitude larger than what can be achieved with scattering by conventional materials. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPL023
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL023
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Evaluation of Power Deposition in HL-LHC with Crystal-assisted Heavy Ion Collimation
/ Rodin, Volodymyr (CERN) ; Bruce, Roderik (CERN) ; Cai, Rongrong (CERN) ; D'Andrea, Marco (CERN) ; Esposito, Luigi Salvatore (CERN) ; Lechner, Anton (CERN) ; Potoine, Jean-Baptiste (CERN) ; Redaelli, Stefano (CERN) ; Schoofs, Philippe (CERN)
The future LHC heavy-ion program, utilizing 208Pb⁸²⁺ beams at up to 7 Z TeV, is anticipated to operate with substantial intensity upgrade. During periods of short beam lifetime, a potential performance limitation may arise from secondary ions produced by electromagnetic dissociation and hadronic fragmentation in the collimators of the betatron cleaning insertion. [...]
2024 - 5 p.
- Published in : JACoW HB 2023 (2024) 236-240
Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.236-240
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LHC crystal collimation tests with 6.8 Z TeV Pb beams
/ Cai, R (CERN ; Ecole Polytechnique, Lausanne) ; Aberle, O (CERN) ; Bruce, R (CERN) ; Calviani, M (CERN) ; D'Andrea, M (CERN) ; Demassieux, Q (CERN) ; Dewhurst, K (CERN) ; Di Castro, M (CERN) ; Esposito, L S (CERN) ; Gilardoni, S (CERN) et al.
In the next heavy ion runs at the LHC, the cleaning of the beam halo will rely on crystal collimation. A test system installed in the collimation cleaning insertion is being upgraded for the operational challenges of the ion runs. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) TUPM120
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.TUPM120
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6.
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Collimation of 400 MJ Beams at the LHC: The First Step Towards the HL-LHC Era
/ Redaelli, Stefano (CERN) ; Abramov, Andrey (CERN) ; Baillard, Dylan (CERN) ; Bruce, Roderik (CERN) ; Cai, Rongrong (CERN ; Ecole Polytechnique, Lausanne) ; Carra, Federico (CERN) ; D'Andrea, Marco (CERN) ; Di Castro, Mario (CERN) ; Giacomel, Lorenzo (CERN) ; Hermes, Pascal (CERN) et al.
An important upgrade programme is planned for the collimation system of the CERN Large Hadron Collider (LHC) in order to meet the challenges of the upcoming High-Luminosity LHC (HL-LHC) project. A first stage of the HL-LHC upgrade was already deployed during the last LHC Long Shutdown, offering important improvements of the collimation cleaning, a significant reduction of the impedance contribution and better cleaning of collisional debris, in particular for ion-ion collisions. [...]
2024 - 4 p.
- Published in : JACoW HB 2023 (2024) 603-606
Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.603-606
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7.
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Power deposition studies for standard and crystal-assisted heavy ion collimation in the CERN Large Hadron Collider
/ Potoine, J.B. (Montpellier U. ; CERN) ; Bruce, R. (CERN) ; Cai, R. (CERN ; Ecole Polytechnique, Lausanne) ; Cerutti, F. (CERN) ; D'Andrea, M. (CERN) ; Esposito, L. (CERN) ; Hermes, P.D. (CERN) ; Lechner, A. (CERN) ; Mirarchi, D. (CERN) ; Redaelli, S. (CERN) et al.
The LHC heavy-ion program with $^{208}$Pb$^{82+}$ beams will benefit from a significant increase of the beam intensity when entering its High-Luminosity era in Run~3 (2023). The stored energy is expected to surpass 20~MJ per beam. [...]
arXiv:2304.03628.-
2023-09-01 - 24 p.
- Published in : Phys. Rev. Accel. Beams 26 (2023) 093001
Fulltext: 2304.03628 - PDF; Publication - PDF;
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8.
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Simulation of Heavy-Ion Beam Losses with Crystal Collimation*
/ Cai, Rongrong (CERN) ; Bruce, Roderik (CERN) ; D'Andrea, Marco (CERN) ; Esposito, Luigi Salvatore (CERN) ; Hermes, Pascal (CERN) ; Lechner, Anton (CERN) ; Mirarchi, Daniele (CERN) ; Potoine, Jean-Baptiste (CERN ; IES, Montpellier) ; Redaelli, Stefano (CERN) ; Salvat Pujol, Francesc (CERN) et al.
With the higher stored energy envisioned for future heavy-ion runs in the LHC and the challenging fragmentation aspect of heavy-ion beams due to interaction with collimator material, the need arises for even more performing collimation systems. One promising solution is crystal channeling, which is used in the HL-LHC baseline and starts with Run III for heavy-ion collimation. [...]
2022 - 5 p.
- Published in : JACoW IPAC 2022 (2022) 2082-2086
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2082-2086
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Advancements in experimental techniques for measuring dipole moments of short-lived particles at the LHC
/ Neri, N (INFN, Milan ; Milan U. ; CERN) ; Akiba, K (NIKHEF, Amsterdam) ; Alessio, F (CERN) ; Bandiera, L (INFN, Ferrara) ; Benettoni, M (INFN, Padua ; Padua U.) ; Cai, R (CERN) ; Cardinale, R (Genoa U.) ; Cesare, S (INFN, Milan ; Milan U.) ; Citterio, M (INFN, Milan ; Milan U.) ; Coco, V (CERN) et al.
ALADDIN is a proposed fixed-target experiment at the LHC for the direct measurement of charm baryon dipole moments. The detector features a spectrometer and a Cherenkov detector, while the experimental technique is based on the phenomena of particle channelling and spin precession in bent crystals. [...]
2024 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1069 (2024) 169875
Fulltext: PDF;
In : 16th Pisa Meeting on Advanced Detectors (Pisameet 2024), La Biodola, Isola D'elba, Italy, 26 May - 1 Jun 2024, pp.169875
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10.
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Crystal Collimation of 20 MJ Heavy-Ion Beams at the HL-LHC
/ D'Andrea, Marco (CERN) ; Bruce, Roderik (CERN) ; Di Castro, Mario (CERN) ; Galluccio, Francesca (INFN, Naples) ; Lamas Garcia, Inigo (CERN) ; Masi, Alessandro (CERN) ; Mirarchi, Daniele (CERN) ; Nevay, Laurence (Royal Holloway, U. of London ; CERN) ; Redaelli, Stefano (CERN) ; Rossi, Roberto (CERN) et al.
The concept of crystal collimation at the Large Hadron Collider (LHC) relies on the use of bent crystals that can deflect halo particles by a much larger angle than the standard multi-stage collimation system. Following an extensive campaign of studies and performance validations, a number of crystal collimation tests with Pb ion beams were performed in 2018 at energies up to 6.37 Z TeV. [...]
2021 - 4 p.
- Published in : 10.18429/JACoW-IPAC2021-WEPAB023
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, Br, 24 - 28 May 2021, pp.2644-2647
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