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1.
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Radiation load studies for the proton target area of a multi-TeV muon collider
/ Manczak, Jerzy (CERN) ; Frasca, Alessandro (CERN) ; Portone, Alfredo (Fusion for Energy, Barcelona) ; Lechner, Anton (CERN) ; Rogers, Chris (Daresbury) ; Ahdida, Claudia (CERN) ; Schulte, Daniel (CERN) ; Calzolari, Daniele (CERN) ; Saura Esteban, Francisco Javier (CERN) ; Bottura, Luca (CERN) et al.
Muon production in the multi-TeV muon collider studied by the International Muon Collider Collaboration is planned to be performed with a high-power proton beam interacting with a fixed target. The design of the target area comes with a set of challenges related to the radiation load to front-end equipment. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPR28
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPR28
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2.
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Radiation shielding studies for superconducting magnets in multi-TeV muon colliders
/ Lechner, Anton (CERN) ; Amorim, David (CERN) ; Bottura, L (CERN) ; de Sousa, P Borges (CERN) ; Caiffi, B (INFN, Genoa) ; Calzolari, D (CERN) ; Carli, C (CERN) ; Ferreira Somoza, J (CERN) ; Frasca, A (CERN) ; Lerner, G (CERN) et al.
Circular muon colliders provide the potential to explore center-of-mass energies at the multi-TeV scale within a relatively compact footprint. Because of the short muon lifetime, only a small fraction of stored beam particles will contribute to the physics output, while most of the muons will decay in the collider ring. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPR26
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPR26
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3.
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Progress in the design of the future circular collider FCC-ee interaction region
/ Boscolo, Manuela (Frascati) ; Frasca, Alessandro (CERN) ; Novokhatski, Alexander (SLAC) ; Ciarma, Andrea (Frascati) ; Lechner, Anton (CERN) ; Ilg, Armin (Zurich U.) ; Di Pasquale, Enrico (Frascati) ; Palla, Fabrizio (INFN, Pisa ; CERN) ; Bosi, Filippo (INFN, Pisa) ; Fransesini, Francesco (Frascati) et al.
We report on the latest developments for the FCC-ee interaction region design that represents a major challenge for the collider, which has to achieve extremely high luminosity over a wide range of centre-of-mass energies. The FCC-ee will host four experimental apparatuses. [...]
FERMILAB-CONF-24-0670-PIP2.-
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) TUPC67
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPC67
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4.
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Energy deposition and radiation level studies for the FCC-ee experimental insertions
/ Frasca, Alessandro (CERN ; Liverpool U.) ; Ciarma, Andrea (Frascati) ; Lechner, Anton (CERN) ; Perillo Marcone, Antonio (CERN) ; Humann, Barbara (CERN) ; Järmyr Eriksson, Carl (CERN) ; Welsch, Carsten (Liverpool U.) ; Calzolari, Daniele (CERN) ; Lerner, Giuseppe (CERN) ; Boscolo, Manuela (Frascati) et al.
The Future Circular Collider (FCC) study foresees the construction of a 90.7 km underground ring where, as a first stage, a high-luminosity electron-positron collider (FCC-ee) is envisaged, operating at beam energies from 45.6 GeV (Z pole) to 182.5 GeV (ttbar). In the FCC-ee experimental interaction regions, various physical processes give rise to particle showers that can be detrimental to machine components as well as equipment in the tunnel, such as cables and electronics. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) TUPC66
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPC66
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5.
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Challenges and mitigation measures for synchrotron radiation on the FCC-ee arcs
/ Humann, Barbara (CERN) ; Frasca, Alessandro (CERN) ; Lechner, Anton (CERN) ; Järmyr Eriksson, Carl (CERN) ; Valchkova-Georgieva, Fani (Unlisted, CH) ; Bauche, Jeremie (CERN) ; Hofer, Michael (CERN) ; Kersevan, Roberto (CERN) ; Garcia Alia, Ruben (CERN)
In a high-energy circular electron-positron collider like the Future Circular Collider (FCC-ee) at CERN, synchrotron radiation (SR) presents a significant challenge due to the radiation load on collider magnets and equipment in the tunnel like cables, optical fibers, and electronics. The efficiency of the anticipated photon absorbers in the vacuum chambers depends on the operational beam energy, ranging from 45.6 GeV to 182.5 GeV. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) MOPG04
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPG04
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6.
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FLUKA simulations of neutrino-induced effective dose at a Muon Collider
/ Lerner, Giuseppe (CERN) ; Frasca, Alessandro (CERN ; Liverpool U.) ; Lechner, Anton (CERN) ; Carli, Christian (CERN) ; Ahdida, Claudia (CERN) ; Manczak, Jerzy (CERN)
During the operation of a muon collider in an underground tunnel, most circulating muons decay into an electron (or positron) and a neutrino-antineutrino pair, resulting in a narrow disk of high-energy neutrinos emitted radially in the collider plane and emerging on the Earth’s surface at distances of several km. Thus, dedicated studies are required to assess any potential radiation protection risks to the public due to the interaction of such neutrinos near the surface. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPR27
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPR27
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7.
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Collimation performance of the 400MJ LHC beam at 6.8 TeV
/ Van der Veken, Frederik (CERN) ; Abramov, Andrey (CERN) ; Azzopardi, Gabriella (CERN) ; Broggi, Giacomo (CERN) ; Bruce, Roderik (CERN) ; Cai, Rongrong (CERN) ; D'Andrea, Marco (CERN) ; Dewhurst, K A (CERN) ; Frasca, Alessandro (CERN) ; Hermes, Pascal (CERN) et al.
During the third operational run of the Large Hadron Collider at CERN, starting in 2022, the beam energy was increased to 6.8 TeV and the bunch population is planned to be pushed to unprecedented levels. Already in the first year of operation, beam stored energies up to 400 MJ were achieved. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) TUPM119
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.TUPM119
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8.
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Optimizing Pb beam losses at the LHCb for maximum luminosity
/ Frasca, A (CERN) ; Bruce, R (CERN) ; Cerutti, F (CERN) ; Ciccotelli, A (CERN ; Manchester U.) ; Patecki, M (Warsaw U. of Tech.)
In addition to the physics program with proton beams, the Large Hadron Collider (LHC) also provides collisions of fully-stripped Pb beams for about one month per year. When colliding Pb-Pb nuclei, electromagnetic interactions are the dominating processes because of the intense Coulomb field produced by the ions. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPL030
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL030
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9.
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Simulations and measurements of collisional losses with Pb beams at the LHC
/ Frasca, A (CERN) ; Abramov, A (CERN) ; Bruce, R (CERN) ; Cai, R (CERN) ; Cerutti, F (CERN) ; Esposito, L (CERN) ; Lindström, B (CERN) ; Van der Veken, F (CERN) ; Ziliotto, F (CERN) ; Patecki, M (CERN)
During about one month in every operational year, the Large Hadron Collider (LHC) works as a heavy-ion collider. Four one-month Pb-Pb runs have been executed so far, as well as two p-Pb runs. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPL029
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL029
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10.
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First results of running the LHC with lead ions at a beam energy of 6.8 Z TeV
/ Bruce, R (CERN) ; Fernandez, R Alemany (CERN) ; Argyropoulos, T (CERN) ; Bartosik, H (CERN) ; Bracco, C (CERN) ; D'Andrea, M (CERN) ; Frasca, A (CERN) ; Hermes, P (CERN) ; Jowett, J M (CERN) ; Mirarchi, D (CERN) et al.
A two-day test of operation with Pb ion beams was carried out in the CERN Large Hadron Collider (LHC) in 2022, with the aim of gaining experience in view of the future high luminosity heavy-ion physics runs from 2023 onwards. The LHC experiments received the first Pb-Pb collisions at a record energy of 5.36 TeV centre-of-mass energy per colliding nucleon pair (beam energy 6.8 Z TeV). [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPL021
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL021
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